Preparation and Properties of Vegetable-Oil-Based Thioether Polyol and Ethyl Cellulose Supramolecular Composite Films  

作　　者：Ruyu Yan Jian Fang Xiaohua Yang Na Yao Mei Li Yuan Nie Tianxiang Deng Haiyang Ding Lina Xu Shouhai Li 

机构地区：[1]College of Materials Science and Technology,Beijing Forestry University,Beijing,100083,China [2]Institute of Chemical Industry of Forestry Products,CFA,Nanjing,210042,China [3]National Engineering Lab.for Biomass Chemical Utilization,Nanjing,210042,China [4]Key Lab.of Chemical Engineering of Forest Products,National Forestry and Grassland Administration,Nanjing,210042,China [5]Key Lab.of Biomass Energy and Material,Nanjing,210042,China [6]Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing,210042,China

出　　处：《Journal of Renewable Materials》2023年第4期1937-1950,共14页可再生材料杂志（英文）

基　　金：supported by Jiangsu Province Biomass Energy and Materials Laboratory,China(Grant No.JSBEM-S-202007).

摘　　要：Ethyl cellulose(EC),an important biomass-based material,has excellent film-forming properties.Nevertheless,the high interchain hydrogen bond interaction leads to a high glass transition temperature of EC,which makes it too brittle to be used widely.The hydroxyl group on EC can form a supramolecular system in the form of a non-covalent bond with an effective plasticizer.In this study,an important vegetable-oil-based derivative named dimer fatty acid was used to prepare a novel special plasticizer for EC.Dimer-fatty-acid-based thioether polyol(DATP)was synthesized and used to modify ethyl cellulose films.The supramolecular composite films of DATP and ethyl cellulose were designed using the newly-formed van der Waals force.The thermal stability,morphology,hydrophilicity,and mechanical properties of the composite films were all tested.Pure EC is fragile,and the addition of DATP makes the ethyl cellulose films more flexible.The elongation at the break of EC supramolecular films increased and the tensile strength decreased with the increasing DATP content.The elongation at the break of EC/DATP(60/40)and EC/DATP(50/50)was up to 40.3%and 43.4%,respectively.Noticeably,the thermal initial degradation temperature of the film with 10%DATP is higher than that of pure EC,which may be attributed to the formation of a better supramolecular system in this composite film.The application of bio-based material(EC)is environmentally friendly,and the novel DATP can be used as a special and effective plasticizer to prepare flexible EC films,making it more widely used in energy,chemical industry,materials,agriculture,medicine,and other fields.

关 键 词：Ethyl cellulose dimeric fatty acid based thioether polyol supramolecular system composite films 

分 类 号：TB332[一般工业技术—材料科学与工程]