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《【高分子材料与工程】【毕业设计+开题报告+文献综述】聚氨酯杂化复合膜材料的制备与应用》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、(20届)本科毕业设计聚氨酯杂化复合膜材料的制备与应用49摘要:聚氨酯杂化复合膜是常用作聚氨酯膜改性,赋予其新性能的一种加工方法。本文采用聚氨酯与聚N-异丙基丙烯酰胺复合加工的方式制备一种新型的智能材料,可以广泛应用于智能织物、皮革等领域满足人们特殊与极端环境条件下的动态、多元及智能化过程控制着装方式,在医用方面可用于药物温敏控制释放,这些应用日益受到人们的关注。本文在在聚氨酯溶液中原位合成PNIPAm形成互穿聚合物网络体系,并分别在水、乙醇、异丙醇中湿法成膜的方式,制备了多孔聚氨酯杂化复合膜,并对其孔隙率、拉伸性能和溶胀性进行测试。结果表明,在不同成膜介质得到的聚氨酯
2、杂化复合膜的物理性质不同。当交联剂用量为2%和5%时,溶剂之间置换速率是造成膜材料孔隙大小的主要因素,而当交联剂用量为8%时,PNIPAAm的溶解性能是膜孔隙大小的主导因素。以异丙醇为成膜介质得到的复合膜的力学性能最好,但是以水为成膜介质得到的复合膜的溶胀性能最佳。随着交联剂用量的增加,以异丙醇为成膜介质得到的膜的力学性能一直下降,而以水和乙醇为成膜介质得到的膜的力学性能先降低后增加;当交联剂用量为2%时,在乙醇中成的膜的吸湿溶胀性要好于在水中成的膜,当交联剂用量为5%、8%时在水中成的膜的吸湿溶胀性最好。关键词:聚氨酯杂化膜温敏性交联剂吸湿溶胀率49Polyureth
3、anehybridcompositemembranespreparationandapplicationAbstract:Polyurethanehybridpolyurethanecompositemembraneiscommonlyusedformembranemodification,giventheperformanceofanewprocessingmethod.Inthispaper,polyurethaneandpolyn-isopropylacrylamidePreparationofcompositeprocessing,anewwayofsmartm
4、aterials,canbewidelyusedinsmartfabrics,leatherandotherfieldstomeetthepeopleandtheextremeenvironmentalconditionsuniquedynamic,diverseandintelligentprocessDresscontrolmethodscanbeusedinthemedicalaspectsofthermo-sensitivecontrolledreleaseofdrug,theseapplicationshavebecomeanincreasingconcern
5、.Inthispaper,insitusolutionPNIPAmpolyurethaneinterpenetratingpolymernetworksystemformed,respectively,inwater,ethanol,isopropanolwetfilminthewayofpreparingtheporouspolyurethanehybridcompositefilm,anditsporosity,Tensilepropertiesandswellingtest.Theresultsshowedthatindifferentmediabypolyure
6、thanefilmhybridcompositefilmswithdifferentphysicalproperties.Whenthecross-linkingagentis2%and5%,thesolventexchangerateisthemainfactorintheporesizeofmembranematerials,andwhenthecross-linkingagent8%,PNIPAAmsolubilityisthedominantfactorinmembraneporesize.Isopropylalcoholasfilmmediagetthebes
7、tmechanicalpropertiesofcompositefilm,butwaterasthefilmmedium,theswellinggetthebest.Withtheincreaseofcross-linkertoisopropylalcoholasthefilmmediumbythemechanicalpropertiesofthemembranehasbeendeclining,whilethefilmofwaterandethanolmediabythemechanicalpropertiesofthemembrane