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Preparation and Material Application of Amylose-Polymer Inclusion Complexes by Enzymatic Polymerization Approach

Department of Chemistry, Biotechnology, and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 860-0065, Japan
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Polymers 2017, 9(12), 729; https://doi.org/10.3390/polym9120729
Received: 23 November 2017 / Revised: 10 December 2017 / Accepted: 13 December 2017 / Published: 18 December 2017
(This article belongs to the Special Issue Host-Guest Polymer Complexes)
This review presents our researches on the preparation and material application of inclusion complexes that comprises an amylose host and polymeric guests through phosphorylase-catalyzed enzymatic polymerization. Amylose is a well-known polysaccharide and forms inclusion complexes with various hydrophobic small molecules. Pure amylose is produced by enzymatic polymerization by using α-d-glucose 1-phosphate as a monomer and maltooligosaccharide as a primer catalyzed by phosphorylase. We determined that a propagating chain of amylose during enzymatic polymerization wraps around hydrophobic polymers present in the reaction system to form inclusion complexes. We termed this polymerization “vine-twining polymerization” because it is similar to the way vines of a plant grow around a rod. Hierarchical structured amylosic materials, such as hydrogels and films, were fabricated by inclusion complexation through vine-twining polymerization by using copolymers covalently grafted with hydrophobic guest polymers. The enzymatically produced amyloses induced complexation with the guest polymers in the intermolecular graft copolymers, which acted as cross-linking points to form supramolecular hydrogels. By including a film-formable main-chain in the graft copolymer, a supramolecular film was obtained through hydrogelation. Supramolecular polymeric materials were successfully fabricated through vine-twining polymerization by using primer-guest conjugates. The products of vine-twining polymerization form polymeric continuums of inclusion complexes, where the enzymatically produced amylose chains elongate from the conjugates included in the guest segments of the other conjugates. View Full-Text
Keywords: amylose host; enzymatic polymerization; hierarchical structured material; inclusion complex; vine-twining polymerization amylose host; enzymatic polymerization; hierarchical structured material; inclusion complex; vine-twining polymerization
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Orio, S.; Yamamoto, K.; Kadokawa, J.-I. Preparation and Material Application of Amylose-Polymer Inclusion Complexes by Enzymatic Polymerization Approach. Polymers 2017, 9, 729.

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