制备zif-pan复合材料及其气体吸附性能的研究.

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1、广东石油化工学院毕业论文：制备ZIF-8/PAN复合材料的制备及其气体吸附性能的研究摘要本文以甲醇为溶剂使用溶剂热法合成ZIF-8晶体,接着将晶体分散在PAN/DMF溶液中，然后用静电纺丝的方法制备出一系列ZIF-8/PAN复合纤维膜。对所制得的复合纤维膜进行N2吸附实验、扫描电镜（SEM）和热重（TG）的表征分析以及CO2吸附性能研究。从N2吸附曲线来看，相对于纯PAN纤维膜，ZIF-8/PAN复合纤维膜的比表面积具有很大的提高，ZIF-8负载量的增加有利于增强复合材料的孔性能。通过对SEM图进行比较，

2、发现随着ZIF-8晶体负载量的增加，复合膜纤维表面的串珠结构也随之增加，分布也更加均匀,也即复合纤维膜表面的ZIF-8晶体随着ZIF-8负载量的增加而逐渐增加。通过对热重（TG）曲线进行分析并分别计算复合纤维膜中ZIF-8和PAN的实际含量，发现复合材料中ZIF-8的实际含量大于理论值。CO2吸附曲线结果表明了ZIF-8/PAN复合纤维膜对于CO2的吸附性能与其比表面积的趋势一致，即随着ZIF-8含量的提高，复合材料对CO2的吸附量就越高，这预示着若能优化复合纤维膜中ZIF-8的负载量，所得的复合纤维膜将

3、会在CO2吸附应用上有很好的发展前景。作为比较，本文还通过了原位生长法制备ZIF-8/PAN复合纤维膜并作了简单的比较。关键词：ZIF-8，PAN，复合材料，气体吸附性能，静电纺丝，原位生长I目录AbstractInthispaper,ZIF-8crystalsweresynthesizedbyusingmethanolassolventviasolvent-thermalmethod,andinthenextstepacertainamountoftheobtainedcrystalsweredispe

4、rsedinPAN/DMFsolution,afterthataseriesofZIF-8/PANcompositefibermembraneswerepreparedthroughelectrostaticspinningmethod.TheN2ads-desorptionexperiment,thermogravimetricanalysis(TG),scanningelectronmicroscopy(SEM)andCO2adsorptiontestswereconductedontheseprep

5、aredcompositefibermembranes.FromtheN2ads-desorptioncurves,thespecificsurfaceareaofcompositefibermembranesislargerthanpurethatofpurePANfibermembrane,andtheincreasingloadingofZIF-8crystalsisbenefittoenhancetheporepropertiesofcompositefibermembranes.Bycompar

6、ingtheSEMimages,thebeadedstructuresonthesurfaceofcompositefibermembranesincreasedanddistributedmoreevenly,whichmeansthenumberofZIF-8crystalsonthesurfaceofcompositemembranesincreasedgraduallywiththeloadingofZIF-8increasing.Byanalyzingthethermo-gravimetric(

7、TG)curveandcalculatingtheactualcontentofZIF-8andPANinthecompositefibermembranes，respectively，wefoundthattheactualcontentofZIF-8inthecompositewaslargerthanthetheoreticalvalue.TheCO2adsorptioncurvesshowedthattheCO2adsorptionpropertiesofZIF-8/PANcompositefib

8、ermembranesareinperfectaccordancewiththeirspecificsurfaceareatrend,whichmeanscompositefibermembraneshavehigherCO2adsorptioncapacitieswiththeincreaseofZIF-8contents.ItindicatesthatiftheloadingofZIF-8canbeoptimized,th