兩步光接枝法制備pH敏感膜的研究.pdf

1、重慶大學(xué)碩士學(xué)位論文兩步光接枝法制備pH敏感膜的研究姓名：何霞申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：應(yīng)用化學(xué)指導(dǎo)教師：杜軍20070420重慶大學(xué)碩士學(xué)位論文英文摘要ABSTRACTpHresponsivemembraneisonekindofenvironmentallyresponsivemembrane，itspermeabilitycanbetunedbyalteringthesurroundingpHvalueBecausepHrespon

2、sivemembraneCanbesensitivetopHvalue，itcanbeusedinmanyfieldssuchascontrolleddrugdeliveryseparation，chemicalsensols，watertreatmenteta1ThereforemuchattentionhasrecentlybeenfocusedonthedevelopmentofpHresponsivemembraneUltrav

3、iolet(Uv)inducedgraftingpolymerizationmethodisapopularwaytoimprovetheperformancesofmembranesItiseasytooperatecontinuouslyandthecostofthewholereactiveequipmentsislowMeanwhileexposuretoultravioletisoflittleinfluencingonthe

4、hostmaterials’propertiesHoweverthesimultaneousUVinducedgraftingpolymerizationcallproduceaconsiderableamountofhomopolymcrs，whichresultinthewastesofrawmaterialsThereforeasequentialphotoinducedlivinggraftpolymerizationmetho

5、dwasusedinthestudyInthismethod，theamountofhomopolymcrcanbereducedsignificantlyAlso，initiatorformationandgraftpolymerizationoccurindependentlyinthesuccessivesteps，SOgraftingdensity(numberofgraftingsites)and目aftedpolymerch

6、ainlengthcanalsobecontrolledindependentlywhichisveryimportanttotheresearchofthepHresponsivemembraneInthepresentwork，polypropylene(PP)membraneWasusedasthehostmembraneandthepHresponsivemembraneswerepreparedbythesequentialp

7、hotoinducedliving蓼疏polymerizationmethodwhenbenzphenone(BP)Wasusedasthephotoinitiatorandacrylicacid(AA)WasusedasthemonomerTheinfluencesoftheconcentrationofphotoinitiatortheConcentrationofmonomerthereactiontimeandthereacti

8、ontemperatureonthegraftingyieldincludinggraftingdensityandgraftedpolymerchainlength，WerediscusseddetailedlyAlso，theeffectsofdifferentpolymerizationconditionsonthepHresponsibilityofthegraftedmembranewerestudiedandtheoptim

9、umpolymerizationconditionswereobtainedInthesecondstepofthereaction，differingfromthetraditionalsolventethanol，thesolventofwaterandthemixedsolventofwaterandethanolwerediscussedAttheend，aparticularratioofmixedethanolandwate

10、rWasselectedastheoptimumreactionsolventATRFTIRtechniqueWasusedtoverifythechemicalcompositionofthemembranes，anditindicatedthattheacrylicacidgroupshadbeengraftedontothehostmembranesThermalanalysisshowedthattheacrylicacidgr