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1、萬方數(shù)據(jù)學(xué)校代碼:10225學(xué)號:080179學(xué)位論文堿木質(zhì)素殼聚糖復(fù)合膜的制備及其性能表征指導(dǎo)教師姓名:申請學(xué)位級別:論文提交日期:授予學(xué)位單位:李珊珊方桂珍教授碩士2008年4月東北林業(yè)大學(xué)學(xué)科專業(yè):林產(chǎn)化學(xué)加工工程論文答辯日期:2008年6月授予學(xué)位日期:答辯委員會主席:論文評閱人:素夕厶櫛素大學(xué)萬方數(shù)據(jù)UniversityCode:10225RegisterCode:080179DissertationfortheDegreeofMasterPREPARATIONANDCHARACTERIZAT
2、IONOFALKAI,ILIGNIN.CHITOSANCOMPOSITEMEMBRANECandidate:LiShanshanSupervisor:Pro.FangGuizhenAcademicDegreeAppliedfor:MasterSpeciality:DateofOralExamination:University:ChemicalProcessingEngineeringofForestryProductsJune,2008NortheastForestry萬方數(shù)據(jù)摘要堿木質(zhì)素是我國造紙工
3、業(yè)的主要副產(chǎn)物,直接排放會造成嚴(yán)重環(huán)境污染,而且堿木質(zhì)素是芳香族可再生資源,以污染物大量排放是對資源的極大浪費。因此對堿木質(zhì)素的開發(fā)和利用,不僅可以減少對環(huán)境的污染,還可緩解資源危機,維持可持續(xù)發(fā)展。本文將堿木質(zhì)素制成膜材料并探索膜的用途,先后制備了堿木質(zhì)素殼聚糖共混膜和堿木質(zhì)素殼聚糖反應(yīng)膜。由于堿木質(zhì)素反應(yīng)活性低,因此先用甲醛在堿性條件下對堿木質(zhì)素進行改性,使其總羥基提高57.6%,醇羥基提高150.9%,酚羥基提高16.2%,得到了活性較高的羥甲基化堿木質(zhì)素。用羥甲基化堿木質(zhì)素和殼聚糖先后合成了堿木
4、質(zhì)素殼聚糖共混膜和堿木質(zhì)素殼聚糖反應(yīng)膜,并測定了膜的物理性能并探討膜的用途。堿木質(zhì)素殼聚糖共混膜對二價銅離子的螯合性能較好,靜態(tài)飽和吸附量是303.75,ug/cm2,比殼聚糖膜提高了50.2%:同樣動態(tài)過濾500mL硫酸銅溶液,堿木質(zhì)素殼聚糖共混膜對二價銅離子單位面積膜的累積螯合量是47.41,ug/cm2,比殼聚糖膜提高了52.39%。用戊二醛將羥甲基化堿木質(zhì)素和殼聚糖交聯(lián)制備堿木質(zhì)素殼聚糖反應(yīng)膜,此膜具有極好的抗酸性能,可以在pH=0.1的強酸條件下保持完整和強度,但是膜對二價銅離子的螯合性能比殼
5、聚糖膜下降。本文還探討了堿木質(zhì)素殼聚糖反應(yīng)膜對尿素的緩釋效果和膜對漆酶的固定化效果。堿木質(zhì)素基成膜性研究比較成功但是堿木質(zhì)素基膜材料的應(yīng)用尚需要進一步的研究和探討,將來可以探索堿木質(zhì)素殼聚糖反應(yīng)膜在反應(yīng)型緩釋肥料或農(nóng)藥、農(nóng)業(yè)地膜等方面的使用性能。關(guān)鍵詞羥甲基化木質(zhì)素;殼聚糖;堿木質(zhì)素殼聚糖共混膜;堿木質(zhì)素殼聚糖反應(yīng)膜萬方數(shù)據(jù)AbstractAlkaliligninisthemainby.productinpaperindustryinChina,whosedirectemissionwillcauses
6、erioUSenvironmentalpollutionandresultinagreatwasteofresources.AsalkaliligniniSaromaticrenewableresource,itsdevelopmentandutilizationCannotonlyreduceenvironmentalpollution,butalsoalleviatethecrisisofresourcestomaintainsustainabledevelopment.Thispaperistom
7、akealkaliligninmembranematerialandexploretheusage.Ithasproducedalkalilignin.chitosanmixedmembraneandalkalilignin-chitosanblendedmembrane.Becauseofthelowreactivityofalkalilignin,itshouldbemodifiedbyformaldehydeunderthealkalineconditionfirstly.whichmakesth
8、etotalhydroxyincreaseby57.6%,hydroxy-alcohol150.9%,andphenolhydroxyl16.2%,thengetsthemoreactivehydroxymethylalkalilignin.Withhydroxymethylalkaliligninandchitosan,ithassynthesizedalkalilignin-chitosanmixedmembraneandalkalil