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	聚乙烯醇/二氧化硅杂化膜的制备及渗透蒸发分离环己醇(酮)/环己烷
	肖佩佩 ; 韩笑颜 ; 曾楚怡 ; 赵虹 ; 周继承 ; 李继定 ; XIAO Peipei ; HAN Xiaoyan ; ZENG Chuyi ; ZHAO Hong ; ZHOU Jicheng ; LI Jiding
	2016-03-30 ; 2016-03-30
关键词	膜 分离 聚乙烯醇 二氧化硅 渗透蒸发 membrane separation polyvinyl alcohol silica dioxide pervaporation TQ051.893
其他题名	Pervaporation separation of cyclohexanol(cyclohexanone)/cyclohexane mixture by polyvinyl alcohol(PVA)/silica(SiO_2) hybrid membrane
中文摘要	以聚乙烯醇(PVA)和正硅酸乙酯(TEOS)为原料,经溶胶-凝胶(sol-gel)法制备了不同二氧化硅(SiO2)含量的PVA/SiO2杂化膜。傅里叶变换红外光谱(FT-IR)表明,随着SiO2含量增大,1060cm-1和970cm-1处Si—O—Si特征吸收峰的相对强度逐渐加强,说明TEOS与PVA发生了交联反应;同时膜的分解温度从248℃升高到342℃。杂化膜的SiO2含量从10%增大到40%,其玻璃态温度从115℃升高到124℃。以水为溶剂,测定了杂化膜的耐溶剂性能,与PVA膜相比,杂化膜的耐溶剂性能显著提高。以质量比为0.950/0.025/0.025的环己烷/环己醇/环己酮为原料,测定杂化膜的分离性能,结果表明SiO2含量从10%增大到40%,通量从15.94 g/(m2·h)升高到75.69 g/(m2·h),环己醇的分离因子从1.8升高到2.65。; Polyvinyl alcohol(PVA) / silica(SiO2) hybrid membranes with various silica contents were prepared with the sol-gel method. Fourier transform infrared(FT-IR) spectra showed that the relative intensities of Si—O—Si characteristic absorption peaks at 1060cm-1 and 970cm-1 gradually increased with increasing SiO2 content,indicating crosslinking reaction between tetraethoxysilane(TEOS)and PVA. Thermal gravimetric analysis(TGA) results showed that breakdown temperature increased from 248℃ to 342℃ along with SiO2 content rising from 0 to 40%. Differential scanning calorimetry(DSC) results showed that glass transition temperatures(Tg) rose from 115℃ to 124℃ with increasing SiO2 content from 10% to 40%. Compared with the PVA membrane,solvent resistance of PVA/SiO2 hybrid membranes was significantly improved in water. Using cyclohexane /cyclohexanol/ cyclohexanone mixture with mass fraction of 0.950/0.025/0.025 as feed,separation performance of the hybrid membrane was determined. Total flux increased from 15.94 to 75.69 g/(m2·h) and selectivity ofcyclohexanol increased from 1.8 to 2.65 with increasing SiO2 content from 10% to 40%.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/144092]
专题	清华大学
推荐引用方式 GB/T 7714	肖佩佩,韩笑颜,曾楚怡,等. 聚乙烯醇/二氧化硅杂化膜的制备及渗透蒸发分离环己醇(酮)/环己烷[J],2016, 2016.
APA	肖佩佩.,韩笑颜.,曾楚怡.,赵虹.,周继承.,...&LI Jiding.(2016).聚乙烯醇/二氧化硅杂化膜的制备及渗透蒸发分离环己醇(酮)/环己烷..
MLA	肖佩佩,et al."聚乙烯醇/二氧化硅杂化膜的制备及渗透蒸发分离环己醇(酮)/环己烷".(2016).

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