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低甲醛释放量刨花板用脲醛树脂结构的研究(英文).docx

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低甲醛释放量刨花板用脲醛树脂结构的研究(英文) Introduction: Inrecentyears,peoplehaveincreasinglybecomeconcernedaboutindoorairqualityandhealth.Oneareaofconcernisformaldehydeemissionsfrombuildingmaterials,whichcancontributetoindoorairpollution.Asaresult,manycountrieshaveimplementedregulationsonformaldehydeemissionsfromwood-basedmaterials,includingparticleboardsusedasflooring,furniture,andwallpanels.Oneoptiontoreduceformaldehydeemissionsisthroughtheuseofurea-formaldehyderesinsinthestructureofparticleboards.Thispaperwillexploretheresearchontheuseofurea-formaldehyderesinsinthestructureoflowformaldehydeemissionparticleboards. Background: Formaldehydeisacolorlessgaswithapungentodorthatiswidelyusedinthemanufacturingofvariousproducts,includingbuildingmaterials,textiles,andhouseholdproducts.However,exposuretoformaldehydecancauseavarietyofhealthproblems,includingirritationoftheeyes,nose,andthroat,aswellasrespiratoryproblems.Duetothesehealthconcerns,manycountrieshavesetstandardsforformaldehydeemissionsfromwood-basedmaterials. Oneofthemaintypesofwood-basedmaterialsthatarecommonlyusedintheconstructionindustryisparticleboards.Theseboardsaremadefromwoodparticlesthatarebondedtogetherunderheatandpressureusingsyntheticresins.Urea-formaldehyde(UF)resinsarethemostcommonresinsusedinthemanufacturingofparticleboardsduetotheirlowcostandgoodbondingproperties.However,theuseofUFresinscanalsoresultinformaldehydeemissionsfromparticleboards. ResearchonLowFormaldehydeEmissionParticleboards: Inrecentyears,researchershavebeenexploringwaystoreduceformaldehydeemissionsfromparticleboards.OneapproachthathasbeenstudiedistheuseofUFresinswithlowformaldehydeemissionlevels.LowformaldehydeemissionUFresinsareachievedbyreducingtheamountoffreeformaldehydeintheresinthroughtheadditionofscavengersorbycontrollingthepHleveloftheresinduringmanufacturing. AnotherapproachthathasbeenstudiedistheuseofmodifiedUFresinsintheparticleboardstructure.OnetypeofmodifiedUFresinismelamine-modifiedUF(MUF)resin.MUFresinsaremadebyaddingmelaminetoUFresins,wh