引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 583次   下载 734 本文二维码信息
码上扫一扫!
分享到: 微信 更多
Study on Mechanism of Association between Hydroxy Ethyl Cellulose and Polyvinylpyrrolidone
Yang Yanlian,Luan Yuxia,Pang Bin,Xu Guiying*
Author NameAffiliationE-mail
Yang Yanlian Key Laboratory of Colloid & Interface Chemistry of Ministry of Education, Shandong University, Jinan 250100  
Luan Yuxia Key Laboratory of Colloid & Interface Chemistry of Ministry of Education, Shandong University, Jinan 250100  
Pang Bin Key Laboratory of Colloid & Interface Chemistry of Ministry of Education, Shandong University, Jinan 250100  
Xu Guiying* Key Laboratory of Colloid & Interface Chemistry of Ministry of Education, Shandong University, Jinan 250100 ciclab@sdu.edu.cn 
Abstract:
The mechanism of association between hydroxy ethyl cellulose (HEC) and polyvinylpyrrolidone (PVP) has been studied by viscosity, UV, FTIR and DSC methods. The results indicated that the viscosity of PVP/HEC mixed systems displayed negative synergic effect, but the viscosity of HEC resistant to NaCl was enhanced in the presence of PVP. The reduced viscosity of the HEC solution was decreased when NaCl was being added and it became smaller with the concentration of NaCl increasing. The maximum absorb spectrum of the PVP/HEC mixed system had a red shift compared with their single systems. There appeared a new peak at 2370 cm-1in the FTIR spectrum for the complex system. Both UV and FTIR spectra showed that PVP/HEC complex was formed through the hydrogen bond. The investigation of DSC showed that the macromolecule chains were tightened due to the formation of the complexes.
Key words:  Hydroxy ethyl cellulose (HEC), Polyvinylpyrrolidone (PVP), Association, Complex
FundProject:教育部科学技术研究重点资助项目(99183).
PVP/HEC分子间缔合作用机理探讨
杨延莲,栾玉霞,庞玢,徐桂英*
摘要:
通过粘度、紫外光谱、红外光谱和DSC谱的测定,探讨了PVP/HEC分子间的缔合机理.结果表明,PvP/HEC复合体系相对于单一体系产生了粘度的负协同效应,NaCl的加入使单一体系和复合体系的粘度均下降;在紫外可见吸收光谱中,PVP/HEC复合体系的最大吸收波长λmax相对于PVP、HEC各自的λmax都发生红移;PVP/HEC复合物的红外光谱在2370 cm-1出现新的吸收峰;DSC谱中复合物的峰温高于简单混合物,而其焓变低于简单混合物,这一切均证明HEC与PVP之间未发生疏水缔合,而是HEC的羟基与PV
关键词:  羟乙基纤维素(HEC)  聚乙烯吡咯烷酮(PVP)  缔合作用  复合物
DOI:10.1088/1674-0068/15/2/141-145
分类号: