超临界CO_2流体温度对大豆纤维结构的影响  

Effect of Temperature on the Structure of Soybean Fiber in Supercritical CO_2 Fluid

作　　者：肖国栋[1,2] 唐人成[1,2] 龙家杰[1,2] 

机构地区：[1]现代丝绸国家工程实验室(苏州),江苏苏州215123 [2]苏州大学纺织与服装工程学院,江苏苏州215021

出　　处：《东华大学学报（自然科学版）》2012年第6期655-659,699,共6页Journal of Donghua University(Natural Science)

基　　金：江苏省自然科学基金资助项目(BK2008163);江苏省第十一批科技创新与成果转化专项引导资金资助项目(BE2008066);苏州大学在职获得博士学位人员科研资助项目(Q4115806;14115806)

摘　　要：采用X-射线衍射(XRD)、傅里叶红外光谱(FT-IR)、热重分析(TGA)、差式扫描量热法(DSC)和扫描电子显微镜(SEM)技术,研究了超临界CO2系统中流体温度对大豆纤维结构的影响.研究结果表明,随着超临界CO2流体处理温度的升高,大豆纤维大分子链段相互作用增强,有重排及重结晶现象,纤维结晶比例、晶面间距增大,而晶粒尺寸有减小趋势,同时,纤维热稳定性有所提高,流体介质对大豆纤维表面的溶解或刻蚀更为显著.The effects of temperature on the structure of soybean fiber in supercritical CO2 fluid were investigated by X-ray diffraction （XRD）, Fourier transform infrared spectroscopy （FT-IR）, thermogravimetry analysis （TGA）, differential scanning calorimetry （DSC） and scanning electron microscope （SEM） technology. The results indicated that with the increasing of temperature in supercritical CO2 fluid, the interactions among the macromolecular chains of soybean fiber were increased with a recomposition and recrystallization among them, also the crystal ratio and interplanar crystal spacing were increased accompanying with a decrease in crystal size in soybean fiber. Furthermore, thermal stability of soybean fiber was enhanced, and a more notable dissolving or etching effect on fiber surface were observed.

关 键 词：超临界CO流体 大豆纤维 纤维结构 热稳定性 表面形态 

分 类 号：TS102.1[轻工技术与工程—纺织工程]