本文主要研究内容
作者金中茜(2019)在《聚醚砜/醋酸纤维素共混膜的结构和性能改性研究》一文中研究指出:膜分离过程的分离效率高、运行成本低,已广泛用于水处理行业。近年来,膜材料是膜分离过程的研究热点。聚醚砜(PES)是一种聚砜类聚合物,作为最常用的相转化法制膜原料之一,因其良好的耐热性、耐化学性、机械性能、水解稳定性及生物相容性等优点,在膜分离材料的开发与应用领域引起了人们的关注。然而,聚醚砜膜存在亲水性能差,抗污染性能差等缺点,降低了膜的寿命,限制了膜在水处理等领域的应用。醋酸纤维素具有优异的亲水性能,且价格低廉易得。本文采用添加共混的方式,制备聚醚砜/醋酸纤维素共混膜,可将两者的优点相结合,从而制备出性能优良、价格低廉的膜分离材料。主要研究内容及结论如下:为提高PES膜的抗污染性和亲水性,以不同酯化度的醋酸纤维素(CA、CDA、CTA)为聚合物添加剂,PES为基膜材料,采用浸没沉淀相转化法制备一系列不对称结构的共混平板膜,采用SEM观察膜的微观形貌、ATR-FTIR对膜的基团进行表征,分析成膜过程中醋酸纤维素的质量分数和酯化度对膜的力学性能、孔径、孔隙率、水接触角、纯水通量、BSA截留率、抗污染性的影响。结果表明,添加醋酸纤维素后,三种共混平板膜的拉伸强度、亲水性、纯水通量,抗污染性均比原膜提高,但断裂伸长率有所下降。CDA的质量分数为2.8%时,共混平板膜的综合性能最好,此时膜的平均孔径为0.2517μm,最大孔径为0.2815μm,水接触角为68.06°,BSA截留率为85.44%,通量恢复率为60%,纯水通量为99.83L/(m~2·h),比纯PES原膜提高了5倍。与原膜相比,合理控制添加醋酸纤维素的质量分数和酯化度可以制备具有同时增强亲水性、分离性能和抗污染性的共混平板膜。在第二章的实验结论基础上,以PES和CDA为聚合物原料,DMAc为溶剂,去离子水为凝固浴,制备出PES/CDA共混平板膜。研究铸膜液中添加的丙三醇质量分数和醇的种类对PES/CDA共混平板膜结构和性能的影响,表征了膜的微观形貌,测试了膜的力学性能、孔径、水接触角、纯水通量等性能。结果表明:随着丙三醇质量分数增加,膜表面微孔数目增多且分布越来越均匀,膜截面的指状孔逐渐消失,开始出现圆状空腔结构。丙三醇作为添加剂时,质量分数为6.0%时综合性能最好,此时膜的平均孔径为0.2104μm,最大孔径为0.2230μm,纯水通量为134.51L/(m~2·h),水接触角为79.61°。质量分数相同时,添加乙二醇所得膜的纯水通量最大,添加异丙醇所得膜的水接触角最小。
Abstract
mo fen li guo cheng de fen li xiao lv gao 、yun hang cheng ben di ,yi an fan yong yu shui chu li hang ye 。jin nian lai ,mo cai liao shi mo fen li guo cheng de yan jiu re dian 。ju mi feng (PES)shi yi chong ju feng lei ju ge wu ,zuo wei zui chang yong de xiang zhuai hua fa zhi mo yuan liao zhi yi ,yin ji liang hao de nai re xing 、nai hua xue xing 、ji xie xing neng 、shui jie wen ding xing ji sheng wu xiang rong xing deng you dian ,zai mo fen li cai liao de kai fa yu ying yong ling yu yin qi le ren men de guan zhu 。ran er ,ju mi feng mo cun zai qin shui xing neng cha ,kang wu ran xing neng cha deng que dian ,jiang di le mo de shou ming ,xian zhi le mo zai shui chu li deng ling yu de ying yong 。cu suan qian wei su ju you you yi de qin shui xing neng ,ju jia ge di lian yi de 。ben wen cai yong tian jia gong hun de fang shi ,zhi bei ju mi feng /cu suan qian wei su gong hun mo ,ke jiang liang zhe de you dian xiang jie ge ,cong er zhi bei chu xing neng you liang 、jia ge di lian de mo fen li cai liao 。zhu yao yan jiu nei rong ji jie lun ru xia :wei di gao PESmo de kang wu ran xing he qin shui xing ,yi bu tong zhi hua du de cu suan qian wei su (CA、CDA、CTA)wei ju ge wu tian jia ji ,PESwei ji mo cai liao ,cai yong jin mei chen dian xiang zhuai hua fa zhi bei yi ji lie bu dui chen jie gou de gong hun ping ban mo ,cai yong SEMguan cha mo de wei guan xing mao 、ATR-FTIRdui mo de ji tuan jin hang biao zheng ,fen xi cheng mo guo cheng zhong cu suan qian wei su de zhi liang fen shu he zhi hua du dui mo de li xue xing neng 、kong jing 、kong xi lv 、shui jie chu jiao 、chun shui tong liang 、BSAjie liu lv 、kang wu ran xing de ying xiang 。jie guo biao ming ,tian jia cu suan qian wei su hou ,san chong gong hun ping ban mo de la shen jiang du 、qin shui xing 、chun shui tong liang ,kang wu ran xing jun bi yuan mo di gao ,dan duan lie shen chang lv you suo xia jiang 。CDAde zhi liang fen shu wei 2.8%shi ,gong hun ping ban mo de zeng ge xing neng zui hao ,ci shi mo de ping jun kong jing wei 0.2517μm,zui da kong jing wei 0.2815μm,shui jie chu jiao wei 68.06°,BSAjie liu lv wei 85.44%,tong liang hui fu lv wei 60%,chun shui tong liang wei 99.83L/(m~2·h),bi chun PESyuan mo di gao le 5bei 。yu yuan mo xiang bi ,ge li kong zhi tian jia cu suan qian wei su de zhi liang fen shu he zhi hua du ke yi zhi bei ju you tong shi zeng jiang qin shui xing 、fen li xing neng he kang wu ran xing de gong hun ping ban mo 。zai di er zhang de shi yan jie lun ji chu shang ,yi PEShe CDAwei ju ge wu yuan liao ,DMAcwei rong ji ,qu li zi shui wei ning gu yu ,zhi bei chu PES/CDAgong hun ping ban mo 。yan jiu zhu mo ye zhong tian jia de bing san chun zhi liang fen shu he chun de chong lei dui PES/CDAgong hun ping ban mo jie gou he xing neng de ying xiang ,biao zheng le mo de wei guan xing mao ,ce shi le mo de li xue xing neng 、kong jing 、shui jie chu jiao 、chun shui tong liang deng xing neng 。jie guo biao ming :sui zhao bing san chun zhi liang fen shu zeng jia ,mo biao mian wei kong shu mu zeng duo ju fen bu yue lai yue jun yun ,mo jie mian de zhi zhuang kong zhu jian xiao shi ,kai shi chu xian yuan zhuang kong qiang jie gou 。bing san chun zuo wei tian jia ji shi ,zhi liang fen shu wei 6.0%shi zeng ge xing neng zui hao ,ci shi mo de ping jun kong jing wei 0.2104μm,zui da kong jing wei 0.2230μm,chun shui tong liang wei 134.51L/(m~2·h),shui jie chu jiao wei 79.61°。zhi liang fen shu xiang tong shi ,tian jia yi er chun suo de mo de chun shui tong liang zui da ,tian jia yi bing chun suo de mo de shui jie chu jiao zui xiao 。
论文参考文献
论文详细介绍
论文作者分别是来自浙江理工大学的金中茜,发表于刊物浙江理工大学2019-05-08论文,是一篇关于聚醚砜膜论文,醋酸纤维素论文,共混平板膜论文,小分子醇论文,浸没沉淀相转化法论文,亲水性能论文,抗污染性论文,浙江理工大学2019-05-08论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自浙江理工大学2019-05-08论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
标签:聚醚砜膜论文; 醋酸纤维素论文; 共混平板膜论文; 小分子醇论文; 浸没沉淀相转化法论文; 亲水性能论文; 抗污染性论文; 浙江理工大学2019-05-08论文;