sodium-polyacrylate聚丙烯酸钠大学毕业论文外文文献翻译及原文

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1、毕业设计（论文）外文文献翻译文献、资料中文题目：聚丙烯酸钠文献、资料英文题目：SodiumPolyacrylate文献、资料来源:文献、资料发表（出版）日期:院（部）：专业:班级.•名:学号:指导教师:外文文献原稿和译文原稿SodiumPolyaerylate:Alsoknownassuper-absorbentor“SAP’’(superabsorbentpolymer)，KimberlyClarkusedtocallitSAM(superabsorbentmaterial).Itistypicallyusedinfinegranularfo

2、rm(liketablesalt).Ithelpsimprovecapacityforbetterretentioninadisposablediaper，allowingtheproducttobethinnerwithimprovedperformanceandlessusageofpinefluffpulp.Themolecularstructureofthepolyacrylatehassodiumcarboxylategroupshangingoffthemainchain.Whenitcomesincontactwithwater，

3、thesodiumdetachesitself,leavingonlycarboxylions.Beingnegativelycharged，theseionsrepeloneanothersothatthepolymeralsohascross-links，whicheffectivelyleadstoathree-dimensionalstructure.Ithashigemolecularweightofmorethanamillion;thus，insteadofgettingdissolved，itsolidifiesintoagel

4、.TheHydrogeninthewater(H-O-H)istrappedbytheacrylateduetotheatomicbondsassociatedwiththepolarityforcesbetweentheatoms.Electrolytesintheliquid，suchassaltminerals(urinecontains0.9%ofminerals)，reducepolarity,therebyaffectingsuperabsorbentproperties，especiallywithregardtothesuper

5、absorbentcapacityforliquidretention.ThisisthemainreasonwhydiaperscontainingSAPshouldneverbetestedwithplainwater.Linearmolecularconfigurationshavelesstotalcapacitythannon-linearmoleculesbut，ontheotherhand，retentionofliquidinalinearmoleculeishigherthaninanon-linearmolecule，due

6、toimprovedpolarity.ForalistofSAPsuppliers，pleaseusethislink:SAP，thesuperabsorbentcanbedesignedtoabsorbhigheramountsofliquids(withlessretention)orveryhighretentions(butlowercapacity).Inaddition，asurfacecrosslinkercanbeaddedtothesuperabsorbentparticletohelpitmoveliquidswhileit

7、issaturated.Thishelpsavoidformationof"gelblocks’’，thephenomenonthatdescribestheimpossibilityofmovingliquidsonceaSAPparticlegetssaturated.HistoryofSuperAbsorbentPolymerChemistryUntilthe1980’s，waterabsorbingmaterialswerecellulosicorfiber-basedproducts.Choicesweretissuepaper，co

8、tton,sponge，andfluffpulp.Thewaterretentioncapacityofthesetypesofmaterialsis