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1、第*期赵芬,胡飞:淀粉-丙烯酸盐-普鲁兰多糖Semi-IPN的合成及性能·5·淀粉化学品淀粉-丙烯酸盐-普鲁兰多糖Semi-IPN的合成及性能201803230203赵芬,胡飞*(华南理工大学食品科学与工程学院,广东广州510640)摘要:以马铃薯淀粉为基本骨架,小分子丙烯酸(AA)、弹性直链普鲁兰多糖(PULL)为原料,在过硫酸钾为引发剂,N,N'-亚甲基双丙烯酰胺(MBA)为交联剂的条件下,通过两步水溶液微波法制备了淀粉-丙烯酸盐-普鲁兰多糖半互穿网络聚合材料(st-AA-PULL);采用FTI
2、R、SEM、BET对材料的结构进行了表征,并重点考察了产品的水合特性。结果表明:st-AA-PULL在蒸馏水中的平衡溶胀率高达1333g/g,在自来水和生理盐水中的平衡溶胀率分别为536、126g/g;与传统接枝淀粉聚合材料相比,半互穿网络聚合材料具有更优良的保水性,在60℃高温下放置90min仍保有近30%(质量分数)的水分,重复吸水5次后,吸水率仍可达近60%;在NaCl浓度0.02~0.10mol/L内,耐盐性也有较大提高,在NaCl浓度为0.10mol/L时平衡溶胀率仍保持在130g/g关键
3、词:淀粉;普鲁兰多糖;互穿网络;水合特性中图分类号:Q814.2文献标识码:A文章编号:201803230203SynthesisandCharacteristicsofStarch-AA-PULLSemi-IPNPolymericMaterialZHAOFen,HUFei*(SchoolofFoodScienceandEngineering,SouthChinaUniversityofTechnology,Guangzhou510640,Guangdong,China)Abstract:Starc
4、h-acrylate-pullulansemi-interpenetratingnetworkpolymer(st-AA-PULL)waspreparedbytwo-stepaqueoussolutionmicrowavemethodusingpotatostarchasbasicskeleton,smallmoleculeacrylicacid(AA),structurallyelasticstraightpullulan(PULL)asrawmaterials,potassiumpersulfa
5、teasinitiator,N,N'-methylenebisacrylamideascross-linkingagent.FTIR,SEM,andBETwereusedtocharacterizetheresultingst-AA-PULL,anditshydrationcharacteristicswereinvestigated.Theresultsshowedthattheequilibriumswellingrateofst-AA-PULLindistilledwaterwasashigh
6、as1333g/g,andthatintapwaterandphysiologicalsalinewere536g/gand126g/g,respectively.Thesemi-interpenetratingnetworkmaterialhadbetterwaterretentioncomparedwithtraditionalpolymericmaterials,whichretainednearly30%ofmoistureafterstandingat60℃for90min.Thewate
7、rabsorptionratecouldstillreachnearly60%aftertherepeatedwaterabsorptionforfivetimes.Whentheconcentrationofsodiumchloridesolutionrangedfrom0.02to0.10mol/L,thesalttoleranceofst-AA-PULLwasalsogreatlyimproved.Theequilibriumswellingin0.10mol/Lsodiumchlorides
8、olutionmaintainedat130g/g.Keywords:starch;pullulan;interpenetratingnetwork;hydrationcharacteristics第*期赵芬,胡飞:淀粉-丙烯酸盐-普鲁兰多糖Semi-IPN的合成及性能·5·淀粉是一种来源广泛、价格低廉、可生物降解的天然可再生材料[1],在很多领域均得到广泛的研究和开发,由于其具有不溶于冷水、抗剪切性差、耐水性差等缺点,使其难以单独作为一种高分子材料使用[2],需要对