WO1999035186A1 - Nanocomposite material - Google Patents
Nanocomposite material Download PDFInfo
- Publication number
- WO1999035186A1 WO1999035186A1 PCT/NL1999/000007 NL9900007W WO9935186A1 WO 1999035186 A1 WO1999035186 A1 WO 1999035186A1 NL 9900007 W NL9900007 W NL 9900007W WO 9935186 A1 WO9935186 A1 WO 9935186A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- anions
- nanocomposite material
- layered double
- double hydroxide
- polymeric matrix
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
Definitions
- This invention relates to a nanocomposite material, a method for the preparation of a nanocomposite material and to a shaped article of a nanocomposite material.
- a cationic clay is first modified with a swelling agent, which increases the interlayer distance of the clay structure.
- swelling agents used as swelling agents are surfactants, with a head group formed by an ammonium, pyridinium, sulfonium or phosphonium group, and one or more non-polar tails.
- the cationic head group of the surfactant is exchanged with cations between the crystalline layers of the clay and the tails should be compatible with the polymeric material.
- the modified clay is mixed with monomeric material, which can enter into a bonding interaction with the tails of the swelling agent.
- the monomeric material is then polymerized, the polymers are formed between the layers of the clay and a nanocomposite material is obtained.
- a disadvantage of these known nanocomposite materials is that the quality of the end product is very highly dependent on the quality of the clay used.
- Cationic clay is virtually always a natural product, which is not homogeneous in composition. This inhomogeneity of the clay leads to inhomogeneities in the composition of the nanocomposite material, which means that the desired properties are not always achieved in a sufficient quality. It is therefore desirable to make it possible to incorporate into polymeric material a kind of clay that has a better controllable quality and composition.
- U.S. Patent 5,658,653 describes a polymer composite comprising a polymeric matrix in which a filler is incorporated.
- the polymeric matrix can be a polyolefin, polystyrene, polyurethane , epoxy resin, polyimide, polyacetal, polyester, polyvinyl , polyether or polyacryl .
- the filler is a mixed metal hydroxide that satisfies a specific formula.
- the surface of the filler has been modified in that particular groups have been provided thereon.
- groups can be, for instance, organic acids, salts of sulfonic acids or phosphonic acids.
- anions of the filler have been exchanged with groups that form hydrogen bridges with the polymeric matrix.
- a disadvantage of the material described in the above U.S. patent specification is that the filler is not homogeneously dispersed in the polymeric matrix. This inhomogeneity is presumably due to the fact that only the surface of the filler is modified.
- the object of the present invention is to provide a method for preparing a nanocomposite material comprising a polymeric matrix in which a clay is incorporated, which nanocomposite material is very homogeneous in composition. It is further contemplated for the clay to be of a kind that has a properly controllable quality and composition.
- this object is achieved by incorporating a layered double hydroxide in a polymeric material, which layered double hydroxide is modified in a specific manner-.
- Layered double hydroxides are anionic clays, which, surprisingly, have presently been found to be modifiable so as to allow of homogeneous dispersion in a polymeric material.
- the invention relates to a nanocomposite material based on a polymeric matrix and a layered double hydroxide, wherein the polymeric matrix is present in an amount of at least 50% by weight, based on the nanocomposite material, and wherein the layered double hydroxide contains an amount of anions of at least 20%, based on the total number of anions of the layered double hydroxide, which anions are compatible and/or reactive with the polymeric matrix, and wherein at least 5% of said amount of anions contain a second charge-carrying group.
- a nanocomposite material according to the invention has highly favorable properties.
- the heat resistance, the mechanical strength and the impact resistance of a polymeric material in which a layered double hydroxide is incorporated to obtain a nanocomposite material according to the invention are strongly improved compared with the same properties of the polymeric material in which no layered double hydroxide is incorporated.
- the permeability to gases and liquids, such as oxygen, water vapor and hydrocarbons has been reduced to a considerable extent. Since layered double hydroxides can be prepared synthetically, it is possible, according to the invention, to prepare a nanocomposite material of a constant, controllable quality. It has furthermore been found that, partly due to the specific anions which are present in the layered double hydroxide, a very homogeneous distribution of the layered double hydroxide in the polymeric matrix is accomplished.
- a particular kind of layered double hydroxide can be incorporated into a halogen-containing rubber composition as an acid-acceptor to improve the water resistance of the rubber composition.
- the hydrotalcite aggregates used can be modified with at most 10% by weight of a surfactant. What is involved here, however, is only a modification of the surface of the aggregates, whereby the clay is not sufficiently modified to allow of homogeneous dispersal in the rubber composition.
- a nanocomposite material according to the invention consists for the most part of the material of the polymeric matrix, comprising at least 50% and preferably at least 70% by weight thereof . Both homopolymers and copolymers can serve as polymeric matrix.
- any polymeric matrix can be modified with a layered double hydroxide.
- those skilled in the art are enabled to prepare, for any desired application, a combination of a particular layered double hydroxide and a particular polymeric material, and thereby a desired nanocomposite material .
- Suitable polymeric materials to serve as polymeric matrix in a nanocomposite material according to the invention are both poly-adducts and polycondensates .
- the polymeric matrix has a degree of polymerization of at least 20, more preferably of at least 50.
- degree of polymerization for a definition of the degree of polymerization, reference is made to P.J. Flory, "Principles of Polymer Chemistry", New York, 1953.
- polyolefins such as polyethylene or polypropylene
- vinyl polymers such as polystyrene, polymethyl methacrylate, polyvinyl chloride, polyvinydaye chloride or polyvinylidene fluoride
- polyesters such as polyethylene terephthalate or polycaprolactone
- polycarbonates such as polyaryl ethers, polysulfones, polysulfides, polyamides, polyether imides, polyether esters, polyether ketones, polyether ester ketones, polysiloxanes, poly- urethanes and polyepoxides .
- polyolefins Preferably used are polyolefins, vinyl polymers, polyesters, polycarbonates, polyamides, polyurethanes or polyepoxides, because the properties of these materials show a very strong improvement owing to the presence of a layered double hydroxide.
- a nanocomposite material according to the invention is based, in addition to a polymeric matrix, on a layered double hydroxide (LDH) .
- LDH layered double hydroxide
- This material is a so-called anionic clay, consisting of small crystalline sheets of dimensions of a few nanometers, between which anions are located. By these anions are meant anions other than hydroxyl groups.
- a layered double hydroxide can be both natural and synthetic in nature.
- the layered double hydroxide has a large contact surface and an ion exchange capacity of 0.5 to 6 milliequivalents per gram.
- An LDH preferably used is a hydrotalcite or a hydrotalcite-like material, because these materials can be readily prepared synthetically, while the desired properties can be eminently controlled.
- hydrotalcites that satisfy the formula (I) : [M u _ x) 2+ M x 3+ (OH) 2 ] [A x/y y . n H 2 0] ( I ) , wherein M + is a bivalent cation, M 3+ is a trivalent cation, x is a number between 0.15 and 0.5 , y is 1 or 2 , n is a number from 1 to 10, and A is an anion selected from the group consisting of Cl “ , Br " , N0 3 , S0 4 2 ⁇ and C0 3 2" .
- the bivalent cation is preferably selected from the group of bivalent magnesium, zinc, nickel, iron, copper, cobalt, calcium and manganese ions and combinations of these bivalent cations. Most preferably, the bivalent cation is a magnesium, zinc or calcium ion or a combination thereof.
- the trivalent cation is preferably selected from the group of trivalent aluminum, chromium, iron, cobalt and manganese ions and combinations of these trivalent cations. Most preferably, the trivalent cation is an aluminum, chromium or iron ion or a combination thereof .
- the layered double hydroxide Before a layered double hydroxide can be incorporated in a polymeric matrix for forming a nanocomposite material according to the invention, it should be modified so as to be compatible and/or reactive with the material of the polymeric matrix.
- the layered double hydroxide comprises at least 20%, preferably at least 60%, more preferably at least 80%, based on the total number of anions of the layered double hydroxide, of an amount of anions that are reactive and/or compatible with the polymeric matrix.
- the total number of anions on which the specified amounts of reactive and/or compatible anions are based is understood not to include the hydroxyl groups present in the layered double hydroxide.
- the layered double hydroxide contains at least 95%, based on the total number of anions of the layered double hydroxide, of an amount of anions that are reactive and/or compatible with the polymeric matrix. It has been found that a very homogeneous dispersion of the layered double hydroxide in the polymeric matrix is obtained when such a large amount of reactive and/or compatible anions is present. This dispersion forms a nanocomposite material having uncommonly favorable properties . When a natural layered double hydroxide is used in a nanocomposite material according to the invention, this natural material will normally not contain the desired compatible and/or reactive anions.
- the anions naturally present in natural hydrotalcites such as chloride or nitrate ions
- the desired anions may already have been introduced in the synthesis of the material.
- the anions that are compatible and/or reactive with the polymeric matrix can be introduced by exchange .
- the exchange can be carried out in any known manner, for instance as described by Sugahara et al . , in Ceramics International, 14(1988), 163-167.
- the ion exchange is carried out by suspending the layered double hydroxide in water, whereafter the pH of the suspension is reduced to a value of less than 4.
- a layered double hydroxide can be modified with anions that are solely compatible, solely reactive, or both, with the polymeric matrix, to obtain a homogeneous dispersion of the layered double hydroxide in the polymeric matrix.
- Suitable compatible anions can be selected from anions of carboxylic acids, sulfonic acids, phosphonic acids and sulfate acids which contain an alkyl or an alkyl phenyl group having 6 to 22 carbon atoms. Of course, it is also possible to use combinations of these anions.
- One skilled in the art will be able to select suitable anions for a polymeric material whose properties he seeks to improve by incorporating a layered double hydroxide.
- Anions that are reactive with the polymeric matrix can likewise be selected from the above group of anions of carboxylic acids, sulfonic acids, phosphonic acids and hydrogen sulfates which contain an alkyl or an alkyl phenyl group having 6 to 22 carbon atoms.
- the alkyl or alkyl phenyl chain should comprise a group which is reactive with the polymeric matrix.
- This reactive group can be present both attached to a terminal methylene group of the chain and at a different position in the chain. Examples of such reactive groups are hydroxy, amino, epoxy, vinyl, isocyanate, carboxy, hydroxyphenyl and anhydride.
- combinations of the above reactive anions can be used.
- the choice of the reactive group can be suitably based by the artisan on the nature of the material of the polymeric matrix. It has been found that a nanocomposite material based on a layered double hydroxide that contains the reactive anions mentioned is exceptionally stable. Depending on the nature of the polymeric matrix, the reactive anions mentioned may also be compatible with the polymeric matrix, which yields a still stabler nanocomposite material .
- An important aspect of the invention is that at least 5%, preferably at least 20%, of the above-described compatible and/or reactive anions further contain a second charge-carrying group.
- the first charge-carrying group is the carbonate, sulfonate, phosphonate, or sulfate group, already mentioned above.
- a second charge-carrying group provides a repellent force which forces apart the sheets from which the layered double hydroxide is made up.
- the layered structure of the layered double hydroxide is eliminated and a homogeneous mixing with a polymeric matrix is possible.
- charge-carrying groups examples include ammonium, phosphonium, sulfonium, carboxylate, sulfonate, phosphonate and sulfate groups.
- the second charge-carrying group is a cationic group.
- charge-carrying group is understood also to include groups, such as amino groups, which can be ionized under certain conditions. Further, it will be clear that some of the charge-carrying groups mentioned may also be reactive with the polymeric matrix. It has been found that the use of anions which contain these charge-carrying groups leads to a particularly homogeneous nanocomposite material.
- the invention further relates to a method for preparing a nanocomposite material as described above. That preparation can take place by first preparing a synthetic layered double hydroxide which contains the desired anions, but it is also possible to start from a ready layered double hydroxide and subject this to an ion exchange. Further, the layered double hydroxide modified with the desired anions is mixed with the polymeric matrix to form the nanocomposite material . Instead of mixing the layered double hydroxide with a polymeric material, it is also possible to mix the layered double hydroxide with monomeric material, from which, in a polymerization reaction in the presence of the layered double hydroxide, the polymeric matrix can be formed.
- a nanocomposite material according to the invention it is preferred to grind or pulverize the layered double hydroxide beforehand.
- Such a pretreatment of the layered double hydroxide enables readier and better mixing of the various ingredients.
- Bringing together the ingredients of a nanocomposite material according to the invention can be carried out by any suitable method, provided such method yields a proper mixing. Examples of methods for bringing together the ingredients comprise prolonged stirring at elevated temperature and extrusion. Suitable conditions for the mixing depend on the nature of the selected ingredients and can be simply determined by one skilled in the art.
- the extrusion for instance, can be carried out between 40 and 250°C in an extruder with a double screw.
- nanocomposite materials according to the invention are particularly suitable to be used for a large variety of applications.
- the materials are eminently processable and can be shaped in conventional shaping steps, such as injection molding and extrusion processes. Shaped articles of a variety of natures can be manufactured from the present nanocomposite material. Examples comprise any application for which the material of the polymeric matrix is suited. As preferred applications, fibers, packaging materials and construction materials can be mentioned.
Abstract
Description
Claims
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020007007573A KR20010033982A (en) | 1998-01-09 | 1999-01-08 | Nanocomposite material |
BR9906822-2A BR9906822A (en) | 1998-01-09 | 1999-01-08 | Nanocomposite material based on a polymeric matrix and a double layer hydroxide, process for preparing the same, modified double layer hydroxide, and shaped article. |
AT99900363T ATE223940T1 (en) | 1998-01-09 | 1999-01-08 | NANOCOMPOSITE MATERIAL |
DK99900363T DK1045877T3 (en) | 1998-01-09 | 1999-01-08 | Nano Composite Material |
CA002317641A CA2317641C (en) | 1998-01-09 | 1999-01-08 | Nanocomposite material |
AU18920/99A AU744006B2 (en) | 1998-01-09 | 1999-01-08 | Nanocomposite material |
DE69902873T DE69902873T2 (en) | 1998-01-09 | 1999-01-08 | NANO COMPOSITE |
EP99900363A EP1045877B1 (en) | 1998-01-09 | 1999-01-08 | Nanocomposite material |
JP2000527581A JP2002500254A (en) | 1998-01-09 | 1999-01-08 | Nano composite materials |
US09/582,900 US6365661B1 (en) | 1998-01-09 | 1999-01-08 | Nanocomposite material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1008003 | 1998-01-09 | ||
NL1008003A NL1008003C2 (en) | 1998-01-09 | 1998-01-09 | Nanocomposite material. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999035186A1 true WO1999035186A1 (en) | 1999-07-15 |
Family
ID=19766324
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NL1999/000006 WO1999035185A1 (en) | 1998-01-09 | 1999-01-08 | Nanocomposite material |
PCT/NL1999/000007 WO1999035186A1 (en) | 1998-01-09 | 1999-01-08 | Nanocomposite material |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NL1999/000006 WO1999035185A1 (en) | 1998-01-09 | 1999-01-08 | Nanocomposite material |
Country Status (14)
Country | Link |
---|---|
US (2) | US6365661B1 (en) |
EP (2) | EP1045876B1 (en) |
JP (2) | JP2002500253A (en) |
KR (2) | KR20010033982A (en) |
AT (2) | ATE223940T1 (en) |
AU (2) | AU747957B2 (en) |
BR (2) | BR9906830A (en) |
CA (2) | CA2317641C (en) |
DE (2) | DE69930609T2 (en) |
DK (1) | DK1045877T3 (en) |
ES (1) | ES2184403T3 (en) |
NL (1) | NL1008003C2 (en) |
PT (1) | PT1045877E (en) |
WO (2) | WO1999035185A1 (en) |
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1998
- 1998-01-09 NL NL1008003A patent/NL1008003C2/en not_active IP Right Cessation
-
1999
- 1999-01-08 DK DK99900363T patent/DK1045877T3/en active
- 1999-01-08 ES ES99900363T patent/ES2184403T3/en not_active Expired - Lifetime
- 1999-01-08 WO PCT/NL1999/000006 patent/WO1999035185A1/en active IP Right Grant
- 1999-01-08 US US09/582,900 patent/US6365661B1/en not_active Expired - Fee Related
- 1999-01-08 AT AT99900363T patent/ATE223940T1/en not_active IP Right Cessation
- 1999-01-08 JP JP2000527580A patent/JP2002500253A/en active Pending
- 1999-01-08 AT AT99900362T patent/ATE321808T1/en not_active IP Right Cessation
- 1999-01-08 EP EP99900362A patent/EP1045876B1/en not_active Expired - Lifetime
- 1999-01-08 DE DE69930609T patent/DE69930609T2/en not_active Expired - Lifetime
- 1999-01-08 WO PCT/NL1999/000007 patent/WO1999035186A1/en not_active Application Discontinuation
- 1999-01-08 CA CA002317641A patent/CA2317641C/en not_active Expired - Fee Related
- 1999-01-08 KR KR1020007007573A patent/KR20010033982A/en not_active Application Discontinuation
- 1999-01-08 US US09/582,901 patent/US6372837B1/en not_active Expired - Fee Related
- 1999-01-08 AU AU18919/99A patent/AU747957B2/en not_active Ceased
- 1999-01-08 KR KR1020007007572A patent/KR20010033981A/en not_active Application Discontinuation
- 1999-01-08 JP JP2000527581A patent/JP2002500254A/en active Pending
- 1999-01-08 CA CA002317643A patent/CA2317643C/en not_active Expired - Fee Related
- 1999-01-08 EP EP99900363A patent/EP1045877B1/en not_active Expired - Lifetime
- 1999-01-08 DE DE69902873T patent/DE69902873T2/en not_active Expired - Lifetime
- 1999-01-08 AU AU18920/99A patent/AU744006B2/en not_active Ceased
- 1999-01-08 BR BR9906830-3A patent/BR9906830A/en not_active Application Discontinuation
- 1999-01-08 PT PT99900363T patent/PT1045877E/en unknown
- 1999-01-08 BR BR9906822-2A patent/BR9906822A/en not_active Application Discontinuation
Patent Citations (3)
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US4810734A (en) * | 1987-03-26 | 1989-03-07 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Process for producing composite material |
WO1993011190A1 (en) * | 1991-11-26 | 1993-06-10 | Allied-Signal Inc. | Polymer nanocomposites formed by melt processing of a polymer and an exfoliated layered material derivatized with reactive organo silanes |
WO1996008526A1 (en) * | 1994-09-12 | 1996-03-21 | Cornell Research Foundation, Inc. | Layered silicate-epoxy nanocomposites |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6372837B1 (en) | 1998-01-09 | 2002-04-16 | Nederlandse Organisatie Voor Toegepast Natuurweten Schappelijk Onderzoek Tno | Nanocomposite material |
US6403231B1 (en) | 2000-05-12 | 2002-06-11 | Pechiney Emballage Flexible Europe | Thermoplastic film structures having improved barrier and mechanical properties |
US6447860B1 (en) | 2000-05-12 | 2002-09-10 | Pechiney Emballage Flexible Europe | Squeezable containers for flowable products having improved barrier and mechanical properties |
US6709759B2 (en) | 2000-05-12 | 2004-03-23 | Pechiney Emballage Flexible Europe | Thermoplastic film structures having improved barrier and mechanical properties |
US6841211B1 (en) | 2000-05-12 | 2005-01-11 | Pechiney Emballage Flexible Europe | Containers having improved barrier and mechanical properties |
WO2003066734A1 (en) * | 2002-02-08 | 2003-08-14 | Toyo Boseki Kabushiki Kaisha | Polyester resin composition and process for producing the same |
EP1918320A1 (en) | 2002-12-20 | 2008-05-07 | Huntsman Advanced Materials (Switzerland) GmbH | Flame retardant polymer compositions |
US7635728B2 (en) | 2002-12-20 | 2009-12-22 | Huntsman Advanced Materials Americas Llc | Flame retardant polymer compositions |
US8372899B2 (en) | 2002-12-20 | 2013-02-12 | Huntsman Advanced Materials Americas Llc | Flame retardant polymer compositions |
EP1469034A1 (en) * | 2003-04-04 | 2004-10-20 | Vem S.P.A. | Polimeric nanocomposite material flame retarded, process for preparation and use thereof |
Also Published As
Publication number | Publication date |
---|---|
AU1892099A (en) | 1999-07-26 |
EP1045876B1 (en) | 2006-03-29 |
ES2184403T3 (en) | 2003-04-01 |
CA2317641C (en) | 2009-09-01 |
ATE321808T1 (en) | 2006-04-15 |
DE69930609T2 (en) | 2007-01-11 |
AU747957B2 (en) | 2002-05-30 |
CA2317641A1 (en) | 1999-07-15 |
JP2002500254A (en) | 2002-01-08 |
JP2002500253A (en) | 2002-01-08 |
BR9906822A (en) | 2000-10-17 |
EP1045877A1 (en) | 2000-10-25 |
WO1999035185A1 (en) | 1999-07-15 |
AU744006B2 (en) | 2002-02-14 |
US6365661B1 (en) | 2002-04-02 |
CA2317643A1 (en) | 1999-07-15 |
CA2317643C (en) | 2008-05-20 |
AU1891999A (en) | 1999-07-26 |
NL1008003C2 (en) | 1999-07-12 |
BR9906830A (en) | 2000-10-17 |
KR20010033982A (en) | 2001-04-25 |
DK1045877T3 (en) | 2003-01-20 |
ATE223940T1 (en) | 2002-09-15 |
EP1045876A1 (en) | 2000-10-25 |
DE69930609D1 (en) | 2006-05-18 |
DE69902873D1 (en) | 2002-10-17 |
DE69902873T2 (en) | 2003-05-28 |
EP1045877B1 (en) | 2002-09-11 |
PT1045877E (en) | 2003-01-31 |
KR20010033981A (en) | 2001-04-25 |
US6372837B1 (en) | 2002-04-16 |
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