Development of Inorganic Silica Reverse Osmosis Membranes by Using a Counter-Diffusion Chemical Vapor Deposition Method
Development of Inorganic Silica Reverse Osmosis Membranes by Using a Counter-Diffusion Chemical Vapor Deposition Method
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DOI：
10.1252/jcej.13we293
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发表时间：
2014-07-01
影响因子：
0.8
通讯作者：
Nomura, Mikihiro
中科院分区：
文献类型：
--
作者：
Ikeda, Ayumi;Matsuyama, Emi;Nomura, Mikihiro
利用反扩散化学气相沉积(CVD)方法开发了用于反渗透(RO)膜的二氧化硅杂化膜。在300℃下将硅源(苯基三甲氧基硅烷；PhTMOS)和O-3提供在多孔氧化铝衬底的两侧90min。反渗透试验是在3.0MPa100 mg L-1Nacl溶液中进行的。当总通量为1.7 kg m(-2)h(-1)时，氯化钠截留率最高可达94.2%。组件长度是获得高选择性反渗透膜的重要因素。短节段(6 Cm)较好，因为短节段内O-3浓度较高。讨论了PtMOS水解粉在二氧化硅表面的苯基分解条件。红外光谱分析表明，在300℃下经O-3处理90min后，二氧化硅表面保留了苯基，而在300℃下经O-3处理后，硅醇基团减少了约30%，膜对Na+的截留率较高。
Silica hybrid membranes have been developed for use as reverse osmosis (RO) membranes by using a counter-diffusion chemical vapor deposition (CVD) method. A silica source (phenyltrimethoxysilane; PhTMOS) and O-3 were provided at opposite sides of a porous alumina substrate at 300 degrees C for 90 min. The RO permeation test was conducted for 100 mg L-1 NaCl at 3.0 MPa. The highest NaCl rejection was 94.2% for a total flux of 1.7 kg m(-2) h(-1). The module length is an important factor in obtaining highly selective RO membranes. The short module (6 cm) was better because of the higher O-3 concentration in the module. The decomposition conditions of phenyl groups on the silica surface are discussed for the hydrolysis powder of PhTMOS. According to FT-IR measurements, phenyl groups remained on the silica surface after O-3 treatment for 90 min at 300 degrees C, whereas the number of silanol groups decreased by approximately 30% upon O-3 treatment at 300 degrees C. The high Na+ rejection can be explained by the reduction of the silanol groups in the membrane.