Influence of the monomers type on the morphology of polyamide microcapsules.
Influence of the monomers type on the morphology of polyamide microcapsules.
复制标题
单体类型对聚酰胺微胶囊形貌的影响。
DOI：
10.2174/1567201043479984
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发表时间：
2004
影响因子：
2.4
通讯作者：
M. Burgard
中科院分区：
文献类型：
--
作者：
A. Laguecir;M. Louhaichi;M. Burgard
以脂肪族二胺乙二胺（EDA）、1，6-己二胺（HMDA）和芳香族二胺1，4-苯二胺（PDA）为原料，对苯二甲酰氯为原料，采用反相乳液（油包水）界面缩聚法制备了聚酰胺微胶囊。因此获得三种类型的聚酰胺微胶囊并分别标记为：CAPS EDA、CAPS HMDA和CAPS PDA。研究了不同取代度对聚酰胺微胶囊的粒径分布、膜的微观结构、孔隙率、比表面积和含水量的影响。聚酰胺膜的粗糙度、孔隙率和孔体积按CAPS EDA < CAPS HMDA < CAPS PDA的顺序增加。进行氯化钠渗透实验以深入了解结构变化对微胶囊对离子物质的渗透性的影响。NaCl在微胶囊中的扩散系数和渗透系数分别为10（-8）cm ~ 2/s和10（-5）cm ~ 2/s。
Various polyamide microcapsules were prepared via an inverse emulsion system (water in oil) by interfacial polycondensation of terephthaloyl dichloride with the aliphatic diamines ethylene diamine (EDA) and 1,6-hexane diamine (HMDA), and the aromatic diamine 1,4-phenylene diamine (PDA). Three types of polyamide microcapsules were thus obtained and labeled: CAPS EDA, CAPS HMDA, and CAPS PDA, respectively. The influence that the various substitutions had on particle size distribution, membrane microstructure, porosity and specific surface area and water content of the polyamide microcapsule was investigated. The roughness, porosity and porous volume of the polyamide membrane increased in the order: CAPS EDA < CAPS HMDA < CAPS PDA. Sodium chloride permeation experiments were performed to obtain an insight into the impact of structural changes on the permeability of the microcapsules to ionic species. The NaCl diffusion and permeability coefficients through the microcapsules were found to be in the order of 10(-8) cm2/s and 10(-5) cm/s, respectively.