文献类型：期刊文献

英文题名：Glutaraldehyde Crosslinked High Content of Amylose/Polyvinyl Alcohol Blend Films with Potent Tensile Strength and Young's Modulus

作者：Wang, Xinqing[1];Huang, Zhenhua[1];Niu, Zhaoyang[1];Chen, Fangping[1,2];Liu, Changsheng[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：14

期号：24

外文期刊名：POLYMERS

收录：;EI(收录号：20225213307718);WOS:【SCI-EXPANDED(收录号:WOS:000904873200001)】；

基金：1. Shanghai Science and Technology Agriculture Project (No. 202002080002F01474); 2. National Natural Science Foundation of China (No. 51772100); 3. Shanghai Pujiang Program (No. 16PJD015); 4. Joint Fund for equipment pre-research of the ministry of education (No. 6141A02022618).

语种：英文

外文关键词：high content of amylose; amylose; PVA blend film; crosslinking; mechanical property; starch

摘要：In recent years, with the development of green environmental protection, starch film has become of interest due to the wide availability of sources, low price, and biodegradability. Amylose/polyvinyl alcohol (PVA) blend films crosslinked with different amounts of glutaraldehyde (GLU) were prepared by a solution casting method. The cross-linking degree, water sorption, tensile property, crystallization and section morphology of the films were examined. With the increase in glutaraldehyde concentration, the cross-linking degree of the blend film was improved. The wide-angle X-ray scattering (WAXS) result indicated that cross-linking hindered the crystallization of film. The section morphology of films was examined by scanning electron microscope (SEM). The results showed that the cross-linking degree of amylose film improved while the crystallinity decreased with the increase in glutaraldehyde content. Cross-linking had no obvious effect on the water sorption property of the blend films. The cross-linking modification significantly enhanced the tensile strength and Young's modulus, while it reduced the elongation at break of the blend films. It was found that the film with 0.5 wt % glutaraldehyde possessed the best performance: the tensile strength increased by 115%, while the elongation at break decreased by 18% even at high relative humidity (RH) of 90% compared to non-crosslinked films. The developed amylose/PVA blend films have promising application prospects as agricultural mulch films and packaging materials.