作　　者： ; ; ; ; ;

机构地区： 华南理工大学轻工与食品学院制浆造纸工程国家重点实验室

出　　处： 《造纸科学与技术》 2004年第6期50-52,共3页

摘　　要： 在本实验中 ,羟乙基纤维素 (HEC)的水溶液为剪切变稀的非牛顿流体。其表观粘度随溶液浓度非线性增大 ,表明在该水溶液中除HEC分子主链间有相互作用外 ,还存在较少量的HEC分子侧链间的弱缠结 ;其水溶液的特性粘度为 0 .9488。在HEC水溶液达到初始粘度后 ,最初HEC分子链由于受到水分子的较大作用而造成粘度急剧下降。随之 ,HEC分子链间的作用与HEC与水分子间的相互作用会产生一个暂时平衡 ,使其溶液的粘度趋于平稳。其后 ,HEC分子链的运动加速 ,同时水分子与HEC链间较强的相互作用破坏了HEC分子侧链的缠结 ,使溶液体系的粘度进一步下降直到趋于平衡。 In this paper, hydroxyethyl cellulese(HEC) aqueous solution is a non-Newtonian fluid with shear thinning. Its apparent viscosity nonlinearly rises with increasing of the concentration. This suggests that, in the solution, there are both interaction of HEC interchain and a little entanglement between side chains of HEC. The intrinsic viscosity of the HEC solution is 0.9488. After reaching initial viscosity, the viscosity of the HEC solution decreases sharply, due to the effect of the H 2O on HEC chains. Late, it makes the viscosity of HEC solution to few changes, because of achieving a balance between the interaction of HEC interchain and the interaction between chain of HEC and H 2O. And then, the movements of the HEC chains accelerate and stronger interaction between HEC chains and H 2O destroys the entanglement between side chains of HEC, the viscosity of the HEC solution decreases until it goes balance.

关 键 词： 分子链 羟乙基纤维素 水溶液 剪切变稀 特性粘度 侧链 粘度特性 下降 平衡

领　　域： [轻工技术与工程] [轻工技术与工程] [经济管理]