高取代氰乙基纤维素膜材料的合成及其性能

本文针对采用高取代氰乙基纤维素(HCEC)作为膜材料进行一系列合成条件试验,对产物的取代度、特性粘度及膜的反渗透性能进行测试,并用红外光谱图及X-射线衍射表征,实验表明HCEC是一种较理想的膜材料,它能很好地溶于丙酮,易成膜,用它制成的反渗透膜除具有较好的反渗透性能外,还具有耐酸、碱水解和抗微生物分解性能。此外,可以按一定比例与CA共混,制成除具有优良的反渗透性能外,抗微生物分解性能以及透水量都比CA膜较好的膜。三种不同膜的横截面电镜图显示其内部结构有明显差别。

The Synthesis and Properties of Highly Cyanoethylate Cellulose Membranous Materials

This Paper mainly reports a series of experiments of synthe tical condition of HCEC, and the suitable manufacture procedure or making HCEC membrane material has been obtained. The degree of substitute and intrinsic viscosity of HCEC, the RO performance characterization of HCEC membrane, IR spectrum and X-rayspectrum of HCEC had been measured. The experiments has indicated that HCEC is a good, membrane material, It can dissolve in many polar solvents. The RO performance characterition of HCEC membrane is satisfactory, as Well as It is much better than CA membrane in microbial dec omposition. acid and basicity hydrolysic. HCEC can be blend with CA compatalty tn a certain proposition. The membrane of HCEC-CA has higher flux and salt rejection than CA,than as well as, It can resist microbile decomposition, The cross-section of three membranes by SEM photographare are shwn apparently differente.