Nanocomposites Prepared by Threading Polymer Chains through Zeolites, Mesoporous Silica, or Silica Nanotubes

Frisch, H. L.; Mark, J. E.

doi:10.1021/cm960046k

Cited by 145 publications

(85 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This reinforcement filler effect of TS-1 zeolite may come from interfacial interaction between the TS-1 zeolite and PBS because of the high surface energy of the zeolite causing the high dispersibility of TS-1 zeolite particles. 53 We hypothesized that TS-1 zeolite incorporation in PBS could change the surface characteristics and enzymatic hydrolysis of the nanocomposite. Hydrophilicity of the film surface is an important factor for enzymatic hydrolysis.…”

Section: Pbs/ts-1 Zeolite Hybrid Compositesmentioning

confidence: 99%

The synthesis of copolymers, blends and composites based on poly(butylene succinate)

Hwang

Yoo

2012

Polym J

View full text Add to dashboard Cite

Poly(butylene succinate) (PBS) is one of the most available environmentally degradable polymers used in industrial applications. Biodegradable polyesters including PBS have low thermal stability, poor mechanical properties and slow crystallization rates. For this reason, many researchers have investigated PBS composites, especially nanocomposites with functional inorganic materials, to identify other advanced properties. We used two inorganic materials to investigate how nanoparticles could be dispersed in a PBS matrix and to identify the properties that could be advanced by fabricating well-dispersed PBS nanocomposites. Clay and zeolite were used for the nano components because they are well known and widely used inorganic materials in polymer-inorganic nanocomposites. The most challenging problem when fabricating the clay-polymer nanocomposite has been how to separate the clay layers in the composite to overcome the very strong cohesive energies between the clay layers. Numerous studies have introduced modifiers into silicate layers to increase the basal space and facilitate easier polymer chain incorporation. We introduce a urethane group on a clay surface to develop physically enhanced PBS/montmorillonite (MMT) nanocomposites. A series of PBS-based ionomers are synthesized by two-step polycondensation. This study focuses on the effect of the ionic group on dynamic mechanical properties, melt rheology, crystallization behavior and enzymatic hydrolysis. INTRODUCTIONThere has been considerable interest in aliphatic biodegradable polyesters over the last decade because of increased concerns about environmental conservation. 1-9 Among aliphatic biodegradable polyesters, poly(butylene succinate) (PBS) is considered to be a promising material in many fields because it has excellent biodegradability, melt processibility and chemical resistance. However, PBS has limited applications because of its poor thermal stability and mechanical properties.PBS/inorganic nanocomposites have been proposed to overcome these drawbacks, and are being developed as the next generation of biodegradable materials. Numerous studies of clay-based biodegradable polymer nanocomposites have focused on changes in preparation methods and morphological properties, as well as the enhancement of mechanical and thermal properties. 10,11 Ray et al. 10 investigated the degree of exfoliation of PBS/clay nanocomposites with various clay types and demonstrated control of the flocculation of dispersed silicate layers in PBS/clay nanocomposites. The achievement of a fine dispersion of the nanofiller in a polymer matrix is a key problem when attempting to produce biodegradable polymer/clay nanocomposites. As noted above, homogeneous clay dispersions in biodegradable polymer matrix are difficult to achieve because of the strong tendency of clay particles to agglomerate. In previous studies, biodegradable polymer nanocomposites with fully dispersed clay were obtained only when the following factors were considered:

show abstract

Section: Pbs/ts-1 Zeolite Hybrid Compositesmentioning

confidence: 99%

The synthesis of copolymers, blends and composites based on poly(butylene succinate)

Hwang

Yoo

2012

Polym J

View full text Add to dashboard Cite

show abstract

“…Com materiais poliméricos de elevado peso molecular, podem ainda surgir limitações adicionais devido ao tamanho das macromoléculas, às diferentes conformações ou à fraca mobilidade. Frish et al 55 prepararam nanocompósitos através da mistura de dois tipos de materiais microporosos (zeólitos 3A e 13X) com poli(dimetilsioxano) (PDMS). Os autores registaram para ambos os compósitos uma melhoria das propriedades mecânicas do elastómero (PDMS), em particular para o nanocompósito contendo o zeólito com poros de maior dimensão (zeólito 13X) 55 .…”

Section: Utilização De Materiais Micro E Mesoporososunclassified

Nanocompósitos de matriz polimérica: estratégias de síntese de materiais híbridos

Esteves¹,

Barros‐Timmons²,

Trindade³

2004

Quím. Nova

View full text Add to dashboard Cite

Recebido em 24/10/03; aceito em 5/2/04; publicado na web em 17/6/04 POLYMER BASED NANOCOMPOSITES: SYNTHETIC STRATEGIES FOR HYBRID MATERIALS. Associating the well known advantages of hybrid materials to the wide potential of nanomaterials, the new and featuring class of polymer nanocomposites turned into one of the most intensively researched areas. This review highlights recent developments in the field of the synthesis of polymer based nanocomposites. Important issues related to the surface modification of fillers, in order to promote the compatibility between the inorganic/organic components, are also reported. The enhancement of the physical properties and the potential applications of polymer nanocomposites are considered in typical examples, given for each synthetic method described.Keywords: nanocomposites; polymers; chemical synthesis. INTRODUÇÃOEncontramos na mitologia grega um dos registos mais antigos da existência de híbridos como seres prodigiosos e fantásticos que povoaram a imaginação dos humanos. O grifo, por exemplo, aliava a força de um corpo de leão à perspicácia e capacidade de voar conferida pela cabeça e asas de uma águia, resultando num temeroso guardião do templo dos Deuses (Figura 1) 1 . Na própria natureza existem materiais híbridos admiráveis, sintetizados através de processos quími-cos em meio aquoso, sob condições de pressão e temperatura ambientes, com mecanismos de "automontagem" envolvendo interacções electroestáticas, ligações de pontes de hidrogénio ou forças de van der Waals 2 . Alguns dos nanocompósitos que ocorrem na natureza apresentam uma arquitectura molecular e sinergia perfeitas entre os seus componentes. Alguns exemplos típicos são o nacre (revestimento das pérolas) que consiste em lamelas nanométricas de aragonite (CaCO 3 ) dispersas numa mistura de proteínas e polissacarídeos, os ossos, os dentes e as conchas de alguns moluscos, que apresentam propriedades mecânicas extraordinárias 2 . Talvez seguindo esta bioinspiração os investigadores começaram por estudar uma forma de reproduzir estas propriedades, tentando aproximar-se do nível de controlo da estrutura e propriedades dos compósitos naturais, numa tentativa de obter materiais avançados. A bio-mineralização é de facto um campo de investigação actual em grande desenvolvimento e com forte repercussão no campo dos materiais híbridos 3,4 . A tendên-cia actual na área dos nanocompósitos é a preparação de materiais em que a interacção entre os componentes ocorre à escala nanométrica ou molecular. Os nanocompósitos obtidos deste modo, apresentam propriedades distintas dos compósitos tradicionais, podendo ser estabelecidas no processo de síntese , tintas e revestimentos 9 e como materiais retardadores de chama 10 . Os nanocompósitos são materiais híbridos em que pelo menos um dos componentes tem dimensões nanométricas. Tal como acontece nos compósitos tradicionais, um dos componentes serve de matriz, na qual as partículas do segundo material se encontram dispersas. Os componentes de um nanocompósito podem ser de natureza...

show abstract

“…For example, for nanocomposites where the organic material is the minority component, incorporation of this organic component is equally critical. Thus, intercalation of proteins inside single-crystal lattices [113,114] or threading of polymer chains through mesoporous materials [115] can be crucial factors in achieving the desired properties for nanostructured materials. An in-depth description of biomineralization processes is beyond the scope of the present review, and the interested reader is referred to the review by Mann [3].…”

Section: Biopolymer Templatesmentioning

confidence: 99%

Nanofabrication in polymer matrices

Liu

Bürger

Chu

2003

Progress in Polymer Science

203

View full text Add to dashboard Cite

Polymeric systems have played important roles as templates for nanofabrication since they can offer nanotemplates with different morphologies and tunable sizes, can be easily removed after reactions, and can be further modified with different functional groups to enhance the interactions. This review covers recent advances in polymer-assisted fabrication of nanomaterials with emphasis on ordered polymeric nanostructures. Examples could include self-assembled amphiphilic block co-polymers/surfactants, cross-linkable polymers, dendrimers, microemulsions, latex particles, biomacromolecules, electric-or shear-induced structures as templates to fabricate inorganic, organic/inorganic composites and polymeric materials with nanoscale modifications. The phase behavior of block co-polymers in water and the use of templates to form ordered nanostructures are reviewed in detail. Modern physical techniques for nanoscale characterization are briefly discussed. q

show abstract

Nanocomposites Prepared by Threading Polymer Chains through Zeolites, Mesoporous Silica, or Silica Nanotubes

Cited by 145 publications

References 67 publications

The synthesis of copolymers, blends and composites based on poly(butylene succinate)

The synthesis of copolymers, blends and composites based on poly(butylene succinate)

Nanocompósitos de matriz polimérica: estratégias de síntese de materiais híbridos

Nanofabrication in polymer matrices

Contact Info

Product

Resources

About