Fungal laccase grafts acrylamide onto lignin in presence of peroxides

Mai, Carsten; Milstein, O.; Hüttermann, A.

doi:10.1007/s002530051428

Cited by 58 publications

(23 citation statements)

References 13 publications

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“…The authors suggest covalent attachment of the poly(acrylamide) chain to the starch backbone via H-abstraction at the glycosidic C-atom ( Figure 22). Poly(acrylamide) grafting onto lignin has been reported in the presence of organic hydroperoxides [162,163]. The proposed mechanism (Figure 23.)…”

Section: Polymer Modificationmentioning

confidence: 99%

Enzyme Initiated Radical Polymerizations

2012

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Section: Polymer Modificationmentioning

confidence: 99%

Enzyme Initiated Radical Polymerizations

2012

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“…One of the fields in which enzymes are increasingly capturing the interest of researchers across the globe is material science. There are several interesting examples describing the functionalization of natural fibers using enzymes in order to increase antibacterial properties [12], antioxidant capacity [12][13][14], or to increase compatibility with synthetic materials [15]. Nevertheless, it is still a challenge to find suitable enzymes for the biotransformation of non-natural and polymeric substrates.…”

Section: Introductionmentioning

confidence: 99%

A New Esterase from Thermobifida halotolerans Hydrolyses Polyethylene Terephthalate (PET) and Polylactic Acid (PLA)

et al. 2012

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Abstract:A new esterase from Thermobifida halotolerans (Thh_Est) was cloned and expressed in E. coli and investigated for surface hydrolysis of polylactic acid (PLA) and polyethylene terephthalate (PET). Thh_Est is a member of the serine hydrolases superfamily containing the -GxSxG-motif with 85-87% homology to an esterase from T. alba, to an acetylxylan esterase from T. fusca and to various Thermobifida cutinases. Thh_Est hydrolyzed the PET model substrate bis(benzoyloxyethyl)terephthalate and PET releasing terephthalic acid and mono-(2-hydroxyethyl) terephthalate in comparable amounts (19.8 and 21.5 mmol/mol of enzyme) while no higher oligomers like bis-(2-hydroxyethyl) terephthalate were detected. Similarly, PLA was hydrolyzed as indicated by the release of lactic acid. Enzymatic surface hydrolysis of PET and PLA led to a strong hydrophilicity increase, as quantified with a WCA decrease from 90.8° and 75.5° to 50.4° and to a complete spread of the water drop on the surface, respectively. OPEN ACCESSPolymers 2012, 4 618

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“…Laccase catalyzed the polymerization of acrylic compounds onto lignosulfonates (191). Laccase in the presence of specific peroxides also grafted acrylamide onto lignin (192). Incubation of lignin with wood-based fibers in the presence of laccase formed covalent attachments with carbohydrate polymers (193).…”

Section: Enzyme Use In Fiber Modificationsmentioning

confidence: 97%

Enzyme Processes for Pulp and Paper: A Review of Recent Developments

Kenealy¹,

Jeffries

2003

ACS Symposium Series

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The pulp and paper industry is applying new, ecologically sound technology in its manufacturing processes. Many interesting enzymatic applications have been proposed in the literature. Implemented technologies tend to change the existing industrial process as little as possible. Commercial applications include xylanases in prebleaching kraft pulps and various enzymes in recycling paper. In the future, value-added products could be built around enzyme processes. When new applications are proposed that do not fit into existing practices, either the process or the enzyme must be altered. The decision depends on process economics and the feasibility of changing the technology. We review here new applications of enzymes in the pulp and paper industry and how they might be changed to implement the technology on an industrial scale. Also, this review suggests how existing enzymes may be used by process engineers to improve the efficiency of unit operations, the pulp products, or both.

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Fungal laccase grafts acrylamide onto lignin in presence of peroxides

Cited by 58 publications

References 13 publications

Enzyme Initiated Radical Polymerizations

Enzyme Initiated Radical Polymerizations

A New Esterase from Thermobifida halotolerans Hydrolyses Polyethylene Terephthalate (PET) and Polylactic Acid (PLA)

Enzyme Processes for Pulp and Paper: A Review of Recent Developments

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