文献类型：期刊文献

英文题名：Stearic acid esterified pectin: Preparation, characterization, and application in edible hydrophobic pectin/chitosan composite films

作者：Wang, Pengkai[1,2];Fei, Peng[3];Zhou, Chunxia[1,2];Hong, Pengzhi[1,2]

机构：[1]Guangdong Ocean Univ, Guangdong Prov Modern Agr Sci & Technol Innovat C, Guangdong Prov Key Lab Aquat Product Proc & Safet, Coll Food Sci & Technol,Guangdong Prov Engn Techn, Zhanjiang 524088, Peoples R China;[2]Southern Marine Sci & Engn Guangdong Lab Zhanjian, Zhanjiang 524025, Peoples R China;[3]Minnan Normal Univ, Sch Biol Sci & Biotechnol, Zhangzhou 363000, Peoples R China

年份：2021

卷号：186

起止页码：528

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：SCI-EXPANDED(收录号：WOS:000688434600009)、、Scopus(收录号：2-s2.0-85110116384)、WOS

基金：The authors gratefully acknowledge the financial support from the Innovation and Development Project about Marine Economy Demon-stration of Zhanjiang City (XM-202008-01B1) ; the Innovation Team Construction Project of Modern Agricultural Industry Technology Sys-tem in Guangdong Province (2019KJ150) ; the Fund of Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang) (ZJW-2019-07) ; the financial assistance supported by Natural Science Foun-dation of Fujian Province of China (No. 2019J05109) and Natural Sci-ence Foundation of Zhangzhou of China (ZZ2019J22) .

语种：英文

外文关键词：Pectin; Stearic acid; Hydrophobic film; Edible film

外文摘要：This work investigated the modification of low-methoxy pectin with stearic anhydride through microwave action with 4-dimethylaminopyridine as catalyst. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses indicated that stearic acid was grafted on the pectin through esterification reaction, with the maximum stearic acid grafting ratio (SGR) of 10.7% for the modified pectin. The introduction of stearic acid was shown to significantly improve the emulsifying activity and stability of pectin. Composite films were prepared by blending the modified pectins and chitosan, and compared with the contact angle of 65.3 degrees for the film with native low-methoxy pectin (PC0), the films with modified pectins showed a significant angle increase, with the highest contact angle reaching 101.9 degrees, indicating a hydrophobic surface. Moreover, an appropriate amount of aliphatic chains could improve the tensile strength and elongation at break of the composite films due to the "anchoring effect".