Formation of Supramolecular Soft Materials from Amylosic Inclusion Complexes with Designed Guest Polymers Obtained by Vine-Twining Polymerization

Abstract

Amylose forms supramolecular inclusion complexes with polymeric guests in the phosphorylase-catalyzed enzymatic polymerization field, so-called “vine-twining polymerization”. However, such inclusion complexes have not exhibited specific properties and processability as functional supramolecular materials. In this study, we found that amylosic inclusion complexes, which were obtained by vine-twining polymerization using a designed guest polymer, that is, an amphiphilic triblock copolymer poly(2-methyl-2-oxazoline- block -tetrahydrofuran- block -2-methyl-2-oxazoline), exhibited gel and film formation properties. The characterization results of the products suggested that enzymatically elongated amylose chains complexed with the polytetrahydrofuran block in the triblock copolymer. Accordingly, the outer poly(2-methyl-2-oxazoline) blocks constructed hydrophilic spaces among the inclusion complex segments. Furthermore, the presence of such outer blocks affected the lower regularity of crystalline alignment among the inclusion complex segments in the products. Such higher-order structures probably induced the formation of supramolecular soft materials, such as gels and films.

Experimental and Molecular Docking Studies on Enzyme-Driven Biohybrid-Inspired Micromotors Based on Amylose-b-(PEG-co-PBA) Inclusion Complexes

“…This is because the driving force behind the formation of inclusion complexes by amylose is a hydrophobic interaction. Therefore, the longer hydrophilic blocks present at the end of the hydrophobic block hinder the complexation by amylose . According to the proposed theoretical framework, PEGBA was produced through a chemical reaction between the resulting compound of a polycondensation reaction of adipoyl chloride and butylene glycol with poly­(ethylene glycol) (Scheme S1).…”

Review on the Analysis Methods of Starch, Amylose, Amylopectinin Food and Agricultural Products

“…Amylose is a soluble part of the starch. Amylose has a straight-chain polymer structure formed by an arrangement of about 1000 α-glucose molecular units bound by α-(1,4)-glycosidic bonds to form a straight-chain polymer [21], [22]. Amylose has a solid helical structure; therefore, amylose is more resistant to digestion than other starch molecules, which is an important characteristic of resistant starch.…”

Chiral Graphene Hybrid Materials: Structures, Properties, and Chiral Applications

“…Amylose can form host–guest inclusion complex with guest substances and even with polymer chains, through hydrophobic interactions between the guests and the helical‐shaped cavity formed along amylose macromolecule chains. [ 228,229 ] Amylose has been substantially used as chiral selectors in chiral chromatography. [ 147,230 ] Compared with other biomacromolecules, e.g., proteins and DNA, amylose shows advantages due to the low cost, easy availability, convenient manipulation, etc.…”