Impact of Hydrogen Peroxide/Thiourea Redox Pretreatment on the Performances of Degummed Fibers for Apocynum Degumming  

作　　者：李长龙 王宗乾 孙瑞霞 李昂 

机构地区：[1]Anhui Key Laboratory of Textile Materials,Anhui Polytechnic University

出　　处：《Journal of Donghua University(English Edition)》2012年第5期450-454,共5页东华大学学报（英文版）

基　　金：Fund of Anhui Province Science Research Projects,China (No. 1106b0105062 );Natural Science Foundation of Anhui Provincial Education Department,China (No. KJ2012B026);Open Fund of Key Laboratory of Advanced Textile Materials and Manufacturing Technology(Zhejiang Sci-Tech University),Ministry of Education,China(No. 201105)

摘　　要：The degnmming pretreatment mechanism was investigated to improve degnmming performance and the spinnability of degummed fibers. Apocynum was treated with redox system in the degumming pretreatment process and the pretreatment parameters had been optimized, besides the effects of pretreatment on property index of degnmmed apocynum fiber were investigated. The results showed that the redox system degumming process reduced alkali boiling time and had good advantages over the traditional degumming process in extraction rate, single fiber length and strength. SEM was used to test the longitudinal morphology changes of fibers before and after pretreatment. At the same time, pretreatment solution was analyzed by UV spectra and electron paramagnetic resonance spectrometer （ESR）, and its pH value was also tested. The results showed that the pretreatment solution could release acid constantly to keep the stability of the pH which caused the swelling and dissolution of pectic substances in apocynum bast. Meanwhile, pretrcatment solution could activate the free radicals from apocynam bast and reduce the activation energy of non- cellulosic composition in apocynum bast.The degumming pretreatment mechanism was investigated to improve degumming performance and the spinnability of degummed fibers. Apocynum was treated with redox system in the degumming pretreatment process and the pretreatment parameters had been optimized, besides the effects of pretreatment on property index of degummed apocynum fiber were investigated. The results showed that the redox system degumming process reduced alkali boiling time and had good advantages over the traditional degumming process in extraction rate, single fiber length and strength. SEM was used to test the longitudinal morphology changes of fibers before and after pretreatment. At the same time, pretreatment solution was analyzed by UV spectra and electron paramagnetic resonance spectrometer (ESR), and its pH value was also tested. The results showed that the pretreatment solution could release acid constantly to keep the stability of the pH which caused the swelling and dissolution of pectic substances in apocynum bast. Meanwhile, pretreatment solution could activate the free radicals from apocynum bast and reduce the activation energy of non-cellulosic composition in apocynum bast.

关 键 词：apocynum redox system degumming pretreatment free radical electron paramagnetic resonance spectrometer （ESR） 

分 类 号：TS19[轻工技术与工程—纺织化学与染整工程]