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1、物理化學學報(WuliHuaxueXuebao)JanuaryActaP．-Chim．Sin．2014，30(1)，11l一120【Article】doi：10．3866／PKU．WHXB201310313、nnⅣ．whxb．pku．edu．Cll新型半纖維素基磁性水凝膠的制備及性能李亞婧孫曉鋒葉青劉柏辰吳耀國(西北工業(yè)大學，空間應用物理與化學教育部重點實驗室，西安710129)摘要：采用H：0．Vc氧化還原體系引發(fā)半纖維素衍生物，以表面修飾的Fe。O粒子作為磁性組分，利用接枝共聚方法制備了新型半纖維素基磁性水凝膠．分別用傅里葉變換EPI-(FTIR)光譜、X射線光電子能譜(XPS)和掃
2、描電子顯微鏡(SEM)對水凝膠的結構及形貌進行了表征，利用X射線衍射(XRD)~I：I振動樣品磁強計(VSM)對水凝膠的晶型結構及磁性能進行了分析，發(fā)現(xiàn)Fe。O粒子均勻分散在凝膠網(wǎng)絡中，半纖維素基磁性水凝膠表現(xiàn)出良好的順磁性．考察了丙烯酸／半纖維素比例、Fes0粒子含量及交聯(lián)劑用量對水凝膠溶脹性能的影響，并探討了該水凝膠的溶脹機理，它在pH8緩沖溶液中的溶脹較好符合Fickian和Scho~動力學模型．通過SEM和溶脹性能分析表明，隨著pH值的升高水凝膠的孔徑增大，水凝膠的溶脹率逐漸增大．制備的水凝膠被用于溶菌酶吸附研究，結果表明磁性凝膠的吸附量大于非磁性水凝膠，水凝膠的吸附行為符合Fr
3、eundlich和Temkin等溫模型．關鍵詞：半纖維素：Fe。0：水凝膠：溶脹動力學：溶菌酶：吸附中圖分類號：0648；0636．1PreparationandPropertiesofaNovelHemicellulose—BasedMagneticHydrogelLl、一JingSUNXiao—FengYEQingLIUBai-ChenWUYao-Guo(KeyLaboratoryofSpaceAppliedPhysicsandChemistry,MinistryofEducation，NorthwesternPolytechnicalUniversity,xinn710129,PR
4、．China)Abstract：HydrogelsareimportantfunctionaImaterialswithmanypotentialapplications．AnoveIhemicellulose—basedmagnetichydrogelwassynthesizedusingagraftcopolymermethod，withH202-Vcasaredoxinitiatorsystemtoinitiatethehemicellulosicderivativeandsurface—modifiedFe3O4particlesasthemagneticcomponent．Th
5、estructuresandmorphologiesofthepreparedmagnetichydrogelswereinvestigatedusingFourier-transforminfrared(FTIR)spectroscopy，X-rayphotoelectronspectroscopy(XPS)，andscanningelectronmicroscopy(SEM)．ThecrystalstructureofthemodifiedFe304particlesandthemagneticbehaviorsofthehemicellulose-basedmagnetichydr
6、ogelswereanalyzedusingX-raydifraction(XRD)andavibrationsamplemagnetometer(VSM)，respectively．TheresultsshowedthattheFe3o4particleswerewelIdispersedinthehydrogelmatrixandthepreparedhydrogelshadparamagneticproperties．Theefectsoftheacrylicacid／hemicelluloseratioandtheamountsofFe3O4particlesandcross．1
7、inkerontheswellingratioofthehydrogelswerestudied。andtheswellingmechanismofthehydrogelswasexplored．TheswellingbehaviorsofthehydrogelsweresimulatedusingFickianandSchofkineticmodelsinapH8bufersolution．Theporesizeandswelli
