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盐酸溶液通过交替沉积的聚电解质自组装多层膜的渗透实验研究 被引量:2

Experimental Study on Hydrochloride Acid Permeation across Layer-by-Layer Self-assembled Polyelectrolyte Membranes
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摘要 采用交替沉积的自组装方法在多孔支撑体上制备了PAH/PSS、PVA/PVS、PDADMAC/PSS三种聚电解质超薄膜,研究了盐酸溶液在浓度梯度下通过所制备膜的渗透行为。实验发现在一定条件下,盐酸的渗透通量随盐酸浓度的增加而增加、与聚电解质自组装膜的组装层数n和膜材料的电荷密度ρc分别成如下的关系:J=5.221+11.755e-n/15.279及J=1.624+102.851e-ρc/0.028(J的单位为:10-10mol?cm?2?s?1)。研究表明:膜的组装层数越多(厚度越大)或膜材料的电荷密度越高时,盐酸的渗透通量越小;通过控制膜的组装层数(厚度)或合成不同电荷密度的膜,可有效地控制膜的渗透速率。 The polyelectrolyte multilayer PAH/PSS, PVA/PVS, PDADMAC/PSS membranes were prepared by alternating layer-by-layer deposition of cationic and anionic polyelectrolyte on the porous PAN/PET supporting membranes, and the transport behavior of hydrochloride acid across the prepared membranes was investigated under the different concentration gradients. It is found that the permeation flux (J) of hydrochloride acid increases with the increase of the feed concentration of hydrochloride acid, and depends on the number of dipping cycles (n) and the charge density (φc) of polyelectrolyte membrane material, which could be expressed respectively as follows: J=5.221+11.755 e-n/15.279 and J=1.624+102.851 e-φc/0.028 (where J is in the unit of 10-10 mol&middotcm-2&middots-1). Experiments show that the permeation flux of membrane decreases with the increase of the membrane thickness and the charge density of the polyelectrolyte material, which indicates that by controlling the number of dipping cycles in membrane preparation or using various polyelectrolyte materials with different charge density to prepare the membrane, the permeation rate of the membranes can be controlled. The polyelectrolyte multilayer membranes may be useful for separation of acids and control of acidity in some reaction systems.
出处 《高校化学工程学报》 EI CAS CSCD 北大核心 2005年第4期445-449,共5页 Journal of Chemical Engineering of Chinese Universities
基金 国家重点基础研究发展计划(973计划)(2003CB615702) 国家自然科学基金项目(20125168 20446002)
关键词 聚电解质 交替沉积 自组装膜 盐酸 渗透 Acidity Gas permeable membranes Hydrochloric acid Multilayers Self assembly Separation
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参考文献12

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同被引文献18

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  • 2苗晶,陈国华,高从堦,蔺存国,王铎,孙明昆.戊二醛交联的壳聚糖硫酸酯/聚砜复合纳滤膜的制备及截留特性[J].高校化学工程学报,2007,21(2):227-232. 被引量:14
  • 3王宏琳,杨大令,张守海,王志鹏,闻学秋,蹇锡高.分离丙烯/丙烷的超薄聚电解质中空纤维复合膜的制备[J].应用化学,2007,24(3):241-244. 被引量:5
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