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中文摘要：
引言 界面聚合是制备超薄复合膜的一种方法，成功地应用于反渗透复合膜、纳滤复合膜等方面^[1-5]。它是通过两种互不相溶的单体溶液在多孔支撑的表面进行聚合，再经热处理、洗涤等工艺后得到超薄复合膜。将完成界面聚合反应而未经后处理（热处理、洗涤等）的膜称为初生态膜（IniM），见图1。
英文摘要：
Initial reverse osmosis composite membrane （IniM） is a thin-film-composite （TFC） membrane prepared through the interracial polymerization technique without post-treatment, such as water washing, heating, etc. Trimesoyl chloride （TMC） and m-phenylenediamine （MPD） were used to prepare some IniMs through the interracial polymerization technique on the polysulphone supporting membrane without heattreatment and washing. Then the in situ modification was performed with tetraethylenepentamine （TEPA） on the surface of IniMs. Modified membranes were characterized by using X-ray photoelectronic spectroscopy （XPS）, contacting angle and permeation experiments with salt water of different pH values. The results showed that tetraethylenepentamine reacted with acyl chloride （--COCl） on the surface of IniM, because the ratio of O/N of the modified membrane surface was lower than that of unmodified membrane. Furthermore, the contacting angle of modified membrane was larger than that of unmodified membrane. It is interesting that the water flux and rejection of modified membrane decreased with increasing pH value for sodium chloride solution, while the unmodified membrane was just on the contrary. The reason was that functional groups on the modified and unmodified membrane were different, the former were amino （--NH2） and imino （-NH）, and the latter was carboxyl （--COOH）.
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