New surface cross‐linking method to fabricate positively charged nanofiltration membranes for dye removal

Wang Xiao; Ju Xiaohui; Jia Tian‐Zhi; Xia Qian‐Cheng; Guo Jia‐Lin; Wang Chen; Cui Zhaoliang; Wang Yong; Xing Weihong; Sun Shi‐Peng

摘要

Abstract <section xml:id="jctb5571-sec-0001" numbered="no"> <title type="main">BACKGROUND >At present, most commercial nanofiltration (NF) membranes are negatively charged. An effective way to prepare a positively charged NF membrane is to cross‐link polyimide (PI) substrate with polyethyleneimine (PEI). However, the lack of an efficient process for selecting proper cross‐linking conditions is an important issue. Therefore, the major objective of this work is to develop an efficient method to cross‐link only the top surface of the membranes. </section> <section xml:id="jctb5571-sec-0002" numbered="no"> <title type="main">RESULTS >The optimum cross‐linking condition was found to be at a cross‐linking temperature of 70 °C, cross‐linking time of 80 minutes and stirring speed of 500 rpm. Comparing the membrane before and after cross‐linking, the molecular weight cut‐off changed from 17520 Da to 458 Da and the membrane surface changed from positive from negative. The cross‐linked membrane showed high rejection (95%) for basic dyes with different molecular weights and relatively high antifouling properties to these dyes (flux recovery ratio 92%, total flux decline ratio 26.7%, irreversible flux decline ratio 7.3%). </section> <section xml:id="jctb5571-sec-0003" numbered="no"> <title type="main">CONCLUSIONS >Stirring speed was found to greatly influence the membrane performance. It was found that there exists an optimum stirring speed at which the cross‐linker distributes evenly on the membrane surface for the most effective cross‐linking to take place. The newly developed surface cross‐linking method also may have the potential to modify other types of membrane surfaces. ? 2018 Society of Chemical Ind </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract XMLNS =“http://www.wiley.com/namespaces/wiley”type =“main”xml：lang =“en”> <title type =“main”>抽象</ title> <section XML：ID =“JCTB5571-SEC-0001”编号=“否”> <标题类型=“main”>背景</标题> >目前，大多数商业纳米滤波（NF）膜被带负电。制备带正电荷的NF膜的有效方法是用聚乙烯亚胺（PEI）交联聚酰亚胺（PI）底物。然而，缺乏选择适当的交联条件的有效过程是一个重要问题。因此，这项工作的主要目标是开发一种有效的方法来仅交联膜的顶表面。</ p> </段> <章节XML：ID =“JCTB5571-SEC-0002”编号=“。否“> <标题类型=”main“>结果</ title> >最佳交联条件被发现为70°C的交联温度，交联时间为80分钟和搅拌速度500 rpm。在交联之前和之后比较膜，分子量截止从17520Da变为458Da，膜表面从阳性变为阳性。交联膜显示出具有不同分子量的基本染料的高排斥（＆ 95％）与这些染料的相对高的防污性能（助焊剂回收率＆ 92％，总通量下降率＆ 26.7％，不可逆转的助焊剂比率＆ 7.3％）。</ p> </ section> <secto xml：id =“JCTB5571-SEC-0003”编号=“否”> <标题类型=“main”>结论</ title> >发现搅拌速度大大影响膜性能。发现，在膜表面上存在最佳搅拌速度，其在膜表面上均匀地分布，以进行最有效的交联。新开发的表面交联方法还可具有改变其他类型的膜表面的可能性。还2018年化学学会 </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" > 著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-33908/'>《Journal of Chemical Technology & Biotechnology 》</a> <b style="margin: 0 2px;">|</b><span>2018年第8期</span><b style="margin: 0 2px;">|</b> <span>共11页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Wang Xiao&option=202" target="_blank" rel="nofollow">Wang Xiao;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Ju Xiaohui&option=202" target="_blank" rel="nofollow">Ju Xiaohui;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Jia Tian‐Zhi&option=202" target="_blank" rel="nofollow">Jia Tian‐Zhi;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Xia Qian‐Cheng&option=202" target="_blank" rel="nofollow">Xia Qian‐Cheng;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Guo Jia‐Lin&option=202" target="_blank" rel="nofollow">Guo Jia‐Lin;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Wang Chen&option=202" target="_blank" rel="nofollow">Wang Chen;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Cui Zhaoliang&option=202" target="_blank" rel="nofollow">Cui Zhaoliang;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Wang Yong&option=202" target="_blank" rel="nofollow">Wang Yong;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Xing Weihong&option=202" target="_blank" rel="nofollow">Xing Weihong;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Sun Shi‐Peng&option=202" target="_blank" rel="nofollow">Sun Shi‐Peng;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>State Key Laboratory of Materials‐Oriented Chemical Engineering;</p> <p>State Key Laboratory of Materials‐Oriented Chemical Engineering;</p> <p>State Key Laboratory of Materials‐Oriented Chemical Engineering;</p> <p>State Key Laboratory of Materials‐Oriented Chemical Engineering;</p> <p>State Key Laboratory of Materials‐Oriented Chemical Engineering;</p> <p>State Key Laboratory of Materials‐Oriented Chemical Engineering;</p> <p>State Key Laboratory of Materials‐Oriented Chemical Engineering;</p> <p>State Key Laboratory of Materials‐Oriented Chemical Engineering;</p> <p>State Key Laboratory of Materials‐Oriented Chemical Engineering;</p> <p>State Key Laboratory of Materials‐Oriented Chemical Engineering;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li> <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span> <a href="https://www.zhangqiaokeyan.com/clc/180.html" title="生物工程学（生物技术）">生物工程学（生物技术） ;</a> <a href="https://www.zhangqiaokeyan.com/clc/20827.html" title="生物化学过程">生物化学过程 ;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=positively charged nanofiltration membrane&option=203" rel="nofollow">positively charged nanofiltration membrane;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=surface cross‐linking&option=203" rel="nofollow">surface cross‐linking;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=polyamide‐imide (PAI)&option=203" rel="nofollow">polyamide‐imide (PAI);</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=polyethyleneimine (PEI)&option=203" rel="nofollow">polyethyleneimine (PEI);</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=basic dyes&option=203" rel="nofollow">basic dyes;</a> </p> <div class="translation"> 机译：带正电荷的纳滤膜;表面交联;聚酰胺 - 酰亚胺（PAI）;聚乙烯亚胺（PEI）;基本染料; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li 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