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时间:2020-03-27
《酵母菌发泡PVALCMC多孔复合材料的制备-.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第44卷,第11期工程塑料应用Vol.44,No.11222016年11月ENGINEERINGPLASTICSAPPLICATIONNov.2016doi:10.3969/j.issn.1001-3539.2016.11.005*酵母菌发泡PVAL/CMC多孔复合材料的制备1,21211张敏,杨鱼,李成涛,李八军,刘智勇(1.陕西科技大学教育部轻化工助剂化学与技术重点实验室,西安710021;2.陕西科技大学环境科学与工程学院,西安710021)摘要:采用微生物发泡法,将酵母菌作为微生物发泡剂,结合循环冷冻–解冻法制备聚乙烯
2、醇(PVAL)/羧甲基纤维素(CMC)多孔复合材料。通过单因素试验探讨了酵母菌与葡萄糖比例(Y/G)、发泡时间、发泡温度和CMC与4PVAL比例(CMC/PVAL)对发泡效果的影响,采用L9(3)正交试验进一步优化了发泡条件,通过傅立叶变换红外光谱和扫描电子显微镜(SEM)表征了PVAL/CMC多孔复合材料的结构。结果表明,当Y/G比例为2.8/1、发泡温度为31℃、发泡时间为60min、CMC/PVAL比例为0.7/1时,PVAL/CMC多孔复合材料发泡效果最佳,其中CMC/PVAL比例为主要影响因素,此外,Y/G比例对发泡
3、效果的影响也较为显著。SEM照片显示,以酵母菌为发泡剂制备的PVAL/CMC多孔复合材料具有较高的孔隙率,大孔平均孔径在180μm左右,小孔平均孔径在15μm左右,呈现大孔套小孔的开孔结构。关键词:聚乙烯醇;羧甲基纤维素;酵母菌;微生物发泡;多孔复合材料中图分类号:TQ325.9文献标识码:A文章编号:1001-3539(2016)11-0022-05PreparationofPVAL/CMCPorousCompositesbyMicrobialFoamingMethod1,21211ZhangMin,YangYu,LiChe
4、ngtao,LiBajun,LiuZhiyong(1.KeyLaboratoryofAuxiliaryChemistry&TechnologyforChemicalIndustry,MinistryofEducation,ShaanxiuniversityofScience&Technology,Xi’an710021,China;2.CollegeofEnvironmentalScienceandEngineering,ShaanxiUniversityofScience&Technology,Xi’an710021,Chi
5、na)Abstract:Thepolyvinylalcohol(PVAL)/carboxymethylcellulose(CMC)porouscompositeswerepreparedbymicrobialfoamingandcyclicfreezing-thawingmethod.TheyeastwasmixedintoPVAL/CMCcompositesasmicrobialfoamingagent.TheeffectsofY/Gproportion,foamingtime,foamingtemperature,andC
6、MC/PVALproportiononporouscompositeswerediscussed4bysinglefactorexperiments.L9(3)orthogonaltestwasadoptedtooptimizethefoamingcondition.ThestructuresofPVAL/CMCporouscompositeswerecharacterizedbyFTIRandSEM.Theresultsshowthatwhenthefoamingtimeis60minat31℃,theproportiono
7、fCMC/PVALis0.7/1,theproportionofY/Gis2.8/1,thefoamingeffectisbest.TheproportionofCMC/PVALratioisthemostsignificantfactoronthefoamingbehavior.Inaddition,theeffectofY/Gratioisalsosignificant.SEMphotographsshowthatthePVAL/CMCporouscompositeshavehighporosity,presentingope
8、nporestructureswhichlargecellsaresleevedbysmallcells.Theaveragediameteroflargecellandsmallcellisabout180μmand15μmrespectively.Keywords:pol
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