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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/55131
標題: | 聚丙烯腈表面改質之探討 Surface modification studies of polyacrylonitrile |
作者: | Heng-Soon Chee 朱興順 |
指導教授: | 徐治平 |
關鍵字: | 聚丙烯?,胺丙基三乙氧基矽烷,四乙氧基矽烷,3-環氧丙醇三甲氧基矽烷,(3-巰基丙基)三甲氧基矽烷,二階段改質,三階段改質,奈米過濾薄膜, polyacrylonitrile,(3-aminopropyl)trimethoxysilane,tetraethylorthosilicate,(3-glycidoxypropyl)trimethoxysilane,(3-mercaptopropyl)trimethoxysilane,second-phase modification,third-phase modification,nanofiltration membrane., |
出版年 : | 2015 |
學位: | 碩士 |
摘要: | 在研究論文中,以聚丙烯腈(polyacrylonitrile,PAN)不對稱膜做為薄膜基材,在第一階段表面改質中,利用矽烷(silane)胺丙基三乙氧基矽烷((3-aminopropyl)triethoxysilane,APTES)在無水(anhydrous)狀態下使與PAN上的-CN官能基鍵結,以產生後續改質中的接枝點(grafting point),在第二階段表面改質中,利用silane 四乙氧基矽烷(tetraethylorthosilicate , TEOS)將第一階段分散的接枝點連結起來,在PAN_A表面產生一緻密立體網狀的二氧化矽(SiO2,silica)無機層,在第三階段表面改質中,利用不同種類silane(包括APTES 、3-環氧丙醇三甲氧基矽烷((3-glycidoxypropyl)trimethoxysilane,GPTMS)、與(3-巰基丙基)三甲氧基矽烷 ((3-mercaptopropyl)trimethoxysilane,MPTMS)),經水解(hydrolysis)反應後,在第二階段改質後的PAN_A_T薄膜表面二氧化矽無機層上鍵接,以製備新型奈米過濾(nanofiltration,NF)薄膜。由實驗結果分析重點主要得包括:(1)PAN基材製備時PAN厚度的過高會造成低層結構過於疏鬆,而透過SEM的截面分析可以決定成膜的最適厚度;(2)第一階段表面改質中,反應時間會對PAN表面化學結構與機械強度的影響,必須分析改質後薄膜特性以找出適當的反應時間;(3)分析第二階段和第三階段表面改質後,PAN表面緻密性,以及表面接上官能基特性;(4)分析PAN厚度與其表面親水性的改變,對於過濾水通量的影響。 In this research thesis, asymmetric polyacrylonitrile (PAN) membrane as supporting material, in the first-phase surficial modification, (3-aminopropyl)triethoxysilane (APTES) is bonded with -CN on PAN under anhydrous state, to provide the grafting points for condensation reaction in subsequent surficial modification, in the second-phase surficial modification, reaction of tetraethyl orthosilicate (TEOS) will crosslink the scattered grafting points to become a tight, steric-mesh, inorganic silica (SiO2) film on PAN_A surface, in the third-phase surficial modification, silanes (including APTES, (3-glycidoxypropyl)trimethoxysilane (GPTMS), and (3-mercaptopropyl)trimethoxysilane, (MPTMS)), after hydrolysis and condensation, and are grafted onto SiO2 film on PAN_A_T surface, to prepare a new type of nanofiltration (NF) membrane. By mainly focused on analysis of experimental results include: (1) The preparation of PAN thickness is thick that will cause the lower substrate structure is very friable, and through cross-sectional SEM analysis can determine the optimum thickness of a membrane; (2) At first-phase surficial modification, chemical structure and mechanical strength are affected by reaction times, analysis relations between reaction times and membrane properties can find appropriate reaction times; (3) After the second-phase and three-phase surface modification, surface analysis of PAN membranes shows where density increase, and new functional groups change surface properties; (4) Analysis thickness and hydrophilicity of PAN membranes change, for filtered water flux influence. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/55131 |
全文授權: | 有償授權 |
顯示於系所單位: | 化學工程學系 |
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