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《Journal of Southwest University(Natural Science Edition)》 2019-01
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Preparation and Characterization of a Dendrocalamus sinicusBased All-Component Acetate Membrane

SHI Chun;YANG Jing;YANG Hai-yan;DENG Jia;ZHAO Yi-he;ZHANG Jia-yan;WU Chun-hua;HE Ming-yu;SHI Zheng-jun;University Key Laboratory of Biomass Chemical Refinery and Synthesis, Southwest Forestry University;Key Laboratory for Forest Resources Conservation and Use in the Mountains of Southwest China, Southwest Forestry University;Yunnan Academy of Forestry;  
Dendrocalamus sinicus,which is of great value for development and utilization in Yunnan Province,was selected as the research object.Bamboo powder was pretreated with an NMI/DMSO(1-methylimidazole/dimethyl sulfoxide)solvent system,and acetylation was performed by adding acetic anhydride to carry out acetylation reaction.Acetylated raw materials were used to prepare an all-component membrane and plasticizer polyethylene glycol(PEG)was used to modify the material.Through the determination of raw material composition,infrared spectroscopy,ultraviolet spectroscopy,contact angle,scanning electron microscopy and mechanical property testing,the membrane material was characterized.The contents of lignin,cellulose and hemicellulose of the acetylated raw material were shown to be 22.3%,63.2%and 13.6%respectively,demonstrating that all the three major components of bamboo were well utilized.Fourier transform infrared(FTIR)spectroscopy indicated that the acetylation reaction had an obvious effect on the substitution of hydroxyl groups.The UV transmittance of the base film was zero,and the visible light area transmittance was also low,but with the increase in the amount of the polyethylene glycol added,the transmittance of the membrane increased.The mechanical properties of the modified film were significantly improved.The addition of 50% PEG gave the best results,with an increase in tensile strength by 168%and in elongation by 250%.Contact angle measurement proved that the addition of polyethylene glycol made the hydrophilic properties of the film better.
【Fund】: 国家自然科学基金项目(31760195 31560195);; 云南省创新人才项目(2016HB005)
【CateGory Index】: TB383.2
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