氯化胆碱
结晶度
深共晶溶剂
淀粉
草酸
支链淀粉
层状结构
共晶体系
化学工程
无定形固体
溶剂
材料科学
核化学
化学
高分子化学
有机化学
微观结构
复合材料
直链淀粉
工程类
作者
Qian Xiao,Miaoqi Dai,Hui Zhou,Min Huang,Loong‐Tak Lim,Chaoxi Zeng
标识
DOI:10.1016/j.carbpol.2022.119105
摘要
In this study, we report a top-down approach to fabricate starch nanoplatelets (SNPs) based on a deep eutectic solvent (DES) comprised of choline chloride and oxalic acid dihydrate. When subjecting waxy maize starch (WMS) to 2 h of DES treatment, the SNPs of oxalate half-ester were successfully fabricated. The formation mechanism of SNPs was studied by monitoring the changes in nanoplatelet morphology, amylopectin chain distribution, long-range crystallinity, and semi-crystalline lamellar structure of the DES-treated WMS at various treatment times. During the DES treatment, relative crystallinity values of WMS gradually decreased from 28.7 to 25.2%. With increasing DES treatment time from 0 to 1.5 h, the thickness of crystalline lamellae decreased from 6.38 to 5.57 nm, whereas the opposite trend was observed for the thickness of amorphous lamellae. The method developed in this work offers a green and efficient route to prepare non-toxic starch nanomaterials.
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