Abstract
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.
Highlights
Biopolymers such as polysaccharides, proteins, and nucleic acids are common in Nature and play important in vivo roles [1,2,3]
This review summarizes preparation and material application of amylose-polymer application of amylose-polymer complexes fabricated by the vine-twining polymerization inclusion complexes fabricated inclusion by the vine-twining polymerization approach achieved in our approach achieved in our research group
We presented our studies on the precision preparation of amylose-polymer
Summary
Biopolymers such as polysaccharides, proteins, and nucleic acids are common in Nature and play important in vivo roles [1,2,3]. Amylose can act as a host to form host-guest inclusion complexes with hydrophobic guest molecules of low molecular weight through hydrophobic interactions (Figure 1) [4,5]. Additional methods to directly form amylose-polymer inclusion amylose-polymer inclusion complexes include inclusion polymerization and guest-exchange complexes include inclusion polymerization and guest-exchange approaches [8,9,10]. This review summarizes preparation and material application of amylose-polymer application of amylose-polymer complexes fabricated by the vine-twining polymerization inclusion complexes fabricated inclusion by the vine-twining polymerization approach achieved in our approach achieved in our research group. Preparation of Amylose-Polymer Inclusion Complexes by Enzymatic Polymerization Filed
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