低取代羟丙基纤维素的溶解性及其表征方法  

Solubility and characterization of low-substituted hydroxypropyl cellulose

作　　者：陆红星 张伟[2] 周正华[2,3,4] 潘志娟[2,3,4] 刘兆峰 朱新生[2,3,4] 

机构地区：[1]常熟绣珀纤维有限公司,江苏常熟215522 [2]苏州大学纺织与服装工程学院,江苏苏州215021 [3]南通苏州大学纺织研究院,江苏南通226004 [4]现代丝绸国家工程实验室(苏州),江苏苏州215123

出　　处：《合成纤维工业》2013年第5期36-38,共3页China Synthetic Fiber Industry

基　　金：江苏高校优势学科建设工程资助;南通苏州大学纺织研究院资助;常熟绣珀纤维有限公司的资助

摘　　要：采用偏光显微镜、旋转黏度计和广角X射线衍射仪表征了低取代羟丙基纤维素(HPC)在氢氧化钠水溶液中的溶解性能。结果表明:在质量分数为8%的NaOH溶液中,-5℃下可以较好地溶解HPC,高相对分子质量HPC溶解性较差,而低相对分子质量HPC溶解性较好,且动力黏度小;彩色偏光显微照片中紫红色背景区域意味着HPC大分子链呈胶束状溶解分散状态(即尚未充分溶解),充分溶解的HPC溶液则呈现淡蓝色的背景颜色,而未溶解且保持纤维状的HPC则可能呈现红、黄和蓝三色;偏光显微镜法和旋转黏度计法可以用来表征HPC的溶解性,X射线衍射法则不适宜表征其溶解性。The solubility of low-substituted hydroxypropyl cellulose（HPC） in alkaline aqueous solution was characterized with polarizing microscope,rotational viscometer and wide-angle X-ray diffractometer.The results showed that HPC can be well dissolved in 8% NaOH solution by mass fraction at-5 ℃ ; the solubility of HPC was poor when the relative molecular mass was high,but was relativoly good and the dynamic viscosity was low when the relative molecular mass was low; the purple background area in the color polarizing micrographs implied the micelle-like dispersion state of HPC macromolecules （not being sufficiently dissolved） when the light blue background indicated a fully dissolved HPC solution,on the other hand,undissoluble fibrous cellulose derivative may present red,yellow and/or blue colors.Polarizing microscopy and rotational viscometry can be used to characterize the solubility of HPC when X-ray diffraction was not a rational choice.

关 键 词：羟丙基纤维素 溶解性能 偏光显微镜 动力黏度 特性黏数 结晶度 X射线衍射 

分 类 号：TQ352.9[化学工程]