Effects of chitin nanocrystals on coverage of coating layers and water retention of coating color
作者机构：Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesCollege of Light Industry and Food EngineeringNanjing Forestry UniversityNanjing 210037China
出 版 物：《Journal of Bioresources and Bioproducts》 (生物质资源与工程（英文）)
年 卷 期：2022年第7卷第3期
页 面：201-210页
核心收录：
学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
基 金：support for this work from National Natural Science Foundation of China(No.31370583)
主 题：Chitin TEMPO oxidation Nanocrystals Coating coverage Water retention
摘 要：This study assessed the applicability of chitin nanocrystals prepared by 2,2,6,6-Tetramethyl-1-Piperidine-1-oxyl radical(TEMPO)-mediated oxidation in traditional papermaking coating color ***𝛼-chitin nanocrystals(CTNCs)with different carboxyl content,size,and morphology were prepared from crab shells by alkali pretreatment and TEMPO-mediated oxidation in the water at pH 10,and then the ratio of CTNCs to latex was applied to traditional coating color system to replace part of *** results showed that when the amount of NaClO added as co-oxidant in the oxidation was 15.0 mmol/g of chitin,the carboxyl content of alkali-pretreated CTNCs was up to 0.76 mmol/*** amount of carboxyl groups presented a linear relation with the degree of individualization of nanocrystals and *** the ratio of latex to CTNCs was 90꞉10,the water retention value of the coating was 92%lower than that of the pure latex system,and the rheological property was *** relationship between the addition amount of CTNCs and the surface strength and the coverage of coating layers were also studied,and results showed that when the ratio of latex to CTNCs was 95꞉5,the surface strength was the highest of 1.45 m/s,and the coverage of coating layers rate reached the highest of 78%.
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