Catalytic and interfacial aspects of enzymatic polymer synthesis in reversed micellar systems

Rao, A. Sambasiva; John, Vijay T.; Gonzalez, Richard; Akkara, Joseph A.; Kaplan, David L.

doi:10.1002/bit.260410505

Cited by 105 publications

(53 citation statements)

References 15 publications

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“…During polymerization, the polymer precipitates out of the reaction solution, which limits the applicability of this method [11]. Although several strategies have been used to avoid this precipitation, such as modification of monomer structures [12,13], synthesis in micellar media [14], reverse micelles [15,16], and interfacial polymerizations [17], the final conductivity of the obtained PANI is poor in most cases. This poor solubility is said to be due to the presence of different structures in the polymer, giving a highly branched instead of a predominantly head-to-tail linear structure, as is formed in the traditional chemical polymerization of aniline.…”

Section: Peroxidases In Polymer Synthesismentioning

confidence: 99%

Oxireductases in the Enzymatic Synthesis of Water-Soluble Conducting Polymers

Ochoteco

Mecerreyes

2010

Advances in Polymer Science

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This chapter reviews recent advances in the field of biocatalytic synthesis of water-soluble conducting polymers. Biocatalysis is proposed as a versatile tool for synthesis of conducting polymers. First, the enzymatic synthesis of conducting polymers and its mechanism is discussed as well as the use of different type of enzymes. Next, we describe the use of a new bifunctional template (sodium dodecyl diphenyloxide disulfonate) in the synthesis of polyaniline as a strategy to improve the water solubility and electrical conductivity in the obtained polymer. The recent development of enzyme-catalyzed polymerization of 3,4-ethylenedioxythiophene (EDOT) in the presence of polystyrenesulfonate is discussed. This method results in PEDOT materials that show an electrical conductivity of 2 × 10 −3 S cm −1 and posses excellent film formation ability, as confirmed by atomic force microscopy images. Finally, a simple method for immobilizing horseradish peroxidases in the biocatalytic synthesis of water-soluble conducting polymers is presented. This method is based on a biphasic catalytic system in which the enzyme is encapsulated inside the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate, while other components remain in the aqueous phase. The enzyme is easily recovered after reaction and can be reused several times.

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Section: Peroxidases In Polymer Synthesismentioning

confidence: 99%

Oxireductases in the Enzymatic Synthesis of Water-Soluble Conducting Polymers

Ochoteco

Mecerreyes

2010

Advances in Polymer Science

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“…In the conventional chemical dehalogenation and polycondensation of crystalline plastics with melting points above 3008C, high reaction temperatures are usually needed and equal molar amounts of halogenated compounds result as by-products. Using an enzymatic approach, however, polyethylphenol was synthesized with HRP in micellar solutions [12] and both the molecular weight and dispersity could be controlled by solubility parameters of the reaction medium [13].…”

Section: The Synthesis Of Phenolic and Acrylic Polymers With Oxidoredmentioning

confidence: 99%

New substrates for reliable enzymes: enzymatic modification of polymers

Gübitz

Paulo

2003

Current Opinion in Biotechnology

129

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Recent studies clearly indicate that the modification of synthetic and natural polymers with enzymes is an environmentally friendly alternative to chemical methods using harsh conditions. New processes using lipases, proteases, nitrilases and glycosidases have been developed for the specific non-destructive functionalization of polymer surfaces. The specificity of enzymes has also been exploited in polymer synthesis; for example, lipases have been used for the production of optically active polyesters. Oxidoreductases have been used for the cross-linking and grafting of lignaceous materials and for the production of polymers from phenolics. Recent successes in this area are mainly attributable to advances in the design of reaction systems (e.g. biphasic systems and micellar solutions), while the enzymes are mainly from commercial sources.

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“…Reversed micellar systems were also applicable to HRP-catalyzed polymerization of p-ethylphenol. 5 Kommareddi et al 6 reported that an iron/polymer composite was prepared by HRP-catalyzed polymerization of p-alkylphenols in reversed micelles containing iron oxide. Previously, we reported the oxidative polymerization of o-, m-, and p-phenylenediamines (PDA) by HRP in reversed micellar systems.…”

Section: Introductionmentioning

confidence: 99%

Oxidative polymerization of phenylenediamines by enzyme and magnetic properties of the products

Ichinohe

Muranaka

Kise

1998

J. Appl. Polym. Sci.

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Oxidative polymerization of m-phenylenediamine was carried out using H 2 O 2 as an oxidant and horseradish peroxidase as a catalyst in mixtures of aqueous buffer solution and 1,4-dioxane or in reversed micellar solutions. When the reaction mixture was brought into contact with a stainless steel stick, the obtained polymer responded to a permanent magnet at room temperature in the air. From the ICP emission spectroscopic analysis, it was found that these polymers contained small amounts of transition metals, such as Fe and Ni. The magnetic properties of the obtained polymers were studied with a superconducting quantum interference device (SQUID). The M (magnetization)-H (magnetic field) curves showed sigmoid behavior at 300 K, but did not exhibit a residual magnetization and a coercive force. These properties resembled those of soft ferromagnetic materials. The ferromagnetic behavior was indicated even at 800 K. Polymers of o-and p-phenylenediamines exhibited lower values of saturation magnetization than polymers of m-phenylenediamine.

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Catalytic and interfacial aspects of enzymatic polymer synthesis in reversed micellar systems

Cited by 105 publications

References 15 publications

Oxireductases in the Enzymatic Synthesis of Water-Soluble Conducting Polymers

Oxireductases in the Enzymatic Synthesis of Water-Soluble Conducting Polymers

New substrates for reliable enzymes: enzymatic modification of polymers

Oxidative polymerization of phenylenediamines by enzyme and magnetic properties of the products

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