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1、第63卷第3期化工學(xué)報(bào)V0l_63No.32012年3月CIESCJournalMarch2012尿尼平交聯(lián)大豆蛋白/殼聚糖復(fù)合凝膠的控釋段麗紅,金蓓。,高利軍,馮宗財(cái)。(中山大學(xué)化學(xué)與化學(xué)工程學(xué)院高分子研究所,廣東廣州510275;湛江師范學(xué)院化學(xué)科學(xué)與技術(shù)學(xué)院,廣東湛江524048;。湛江師范學(xué)院化學(xué)與材料研究中心,廣東湛江524048)摘要:利用天然無毒的京尼平交聯(lián)大豆蛋白(SB)和殼聚糖(cs)制備復(fù)合水凝膠(HD)并用作茶堿的控釋載體。同時(shí)對其在模擬胃腸液和pH7.4緩沖液(PBS)中的控釋特性進(jìn)行了
2、研究。結(jié)合掃描電鏡和紅外光譜以及核磁共振表征了復(fù)合凝膠的表觀形態(tài)和結(jié)構(gòu)。結(jié)果表明,復(fù)合水凝膠中大豆蛋白和殼聚糖通過京尼平發(fā)生了明顯的交聯(lián)作用,并呈現(xiàn)致密的片層結(jié)構(gòu)。復(fù)合凝膠在模擬胃腸液和pH7.4PBS中均呈現(xiàn)溶脹現(xiàn)象,在模擬胃液中的溶脹度較低。而且凝膠在pil1.2模擬胃液中的釋放量比模擬腸液和pH7.4PBS液中的低,并發(fā)現(xiàn)該凝膠具有pH響應(yīng),在120h內(nèi)可實(shí)現(xiàn)對茶堿的可控釋放。因此,這種京尼平交聯(lián)的復(fù)合凝膠具有作為藥物在胃腸道中定向運(yùn)送載體的潛力。關(guān)鍵詞:京尼平;大豆蛋白;殼聚糖;復(fù)合凝膠;可控釋放;定向
3、運(yùn)送載體DOI:10.3969/j.issn.0438—1157.2012.03.041中圖分類號:O636.1文獻(xiàn)標(biāo)志碼:A文章編號:0438—1157(2012)03—0962—08Genipin—crosslinkedsoybeanpr0tein/chit0sanhydrogelsforcontrolledreleaseDUANLihong,JINBei。GAOLijun,F(xiàn)ENGZongcai(InstituteofPolymerScience,SchoolofChemistryandChemicalE
4、ngineering,SunYat—senUniversity,Guangzhou510275,Guangdong,China;SchoolofChemistryScienceandTechnology,ZhanjiangNormalUniversity,Zhanjiang524048,Guangdong,China;。ResearchCenterofChemistryandMaterialsScience,ZhanjiangNormalUniversity,Zhanjiang524048,Guangdong,
5、China)Abstract:Anovelhydrogelsystem(HD)composedofsoybean(SB)proteinandchitosan(CS)blendedwithnaturallynon—toxicgenipinwasdevelopedforcontrollingtheophyllinedelivery.Additionally,thereleaseprofileofamodeldrug(theophylline)fromtesthydrogelswasinvestigatedinsim
6、ulatedgastricandintestinalfluidaswellaspH7.4buffer.Thesurfacemorphologyandstructureofcompositechitosan—basedhydrogelswerecharacterizedbyinfraredspectrophotometryandscanningelectronmicroscopyaswellasHNMRspectra.Theseresultsshowedobviouscrosslinkingsystemsfors
7、oybeanproteinandchitosanbygenipininthecompositehydrogels.Thesecompositehydrogelshadretainedcompactsheets.AllhydrogelsswelledinthesimulatedgastricandintestinalsolutionaswellaspH7.4buffer,buttheswellingratioofthehydrogelsinthesimulatedgastricmediumwaslow.Inadd
8、ition,theamountoftheophyllinereleasedinthesimulatedgastricmedium(pil1.2)waslowerthanthatinintestinalfluid(pH6.8)andpH7.4buffer.ThesecompositehydrogelswerefoundtobepH—sensitive.Thecontrolledrelea