組裝法制備水鎂石基氫氧化鎂阻燃劑及其阻燃EVA應(yīng)用研究

組裝法制備水鎂石基氫氧化鎂阻燃劑及其阻燃EVA應(yīng)用研究組裝法制備水鎂石基氫氧化鎂阻燃劑及其阻燃EVA應(yīng)用研究

摘要：針對(duì)EVA（乙烯-醋酸乙烯共聚物）在高溫條件下易燃及釋放有毒物質(zhì)的問題，本文采用組裝法制備了一種水鎂石基（Mg-Al-Si-O-H）氫氧化鎂阻燃劑，并將其作為EVA的阻燃劑。首先通過熱重分析（TGA）和傅里葉紅外光譜（FT-IR）對(duì)氫氧化鎂進(jìn)行表征，并對(duì)其在EVA中的阻燃效果進(jìn)行測(cè)試。結(jié)果發(fā)現(xiàn)，添加3wt%的水鎂石基氫氧化鎂阻燃劑可以有效地提高EVA的阻燃性能，且該阻燃劑的熱穩(wěn)定性較好。同時(shí)，通過掃描電子顯微鏡（SEM）觀察了EVA/水鎂石基氫氧化鎂復(fù)合材料的斷口形貌，發(fā)現(xiàn)該阻燃劑能夠有效地充填EVA的孔隙結(jié)構(gòu)，并與EVA基體良好地結(jié)合在一起。因此，本文的研究為開發(fā)新型的高效阻燃材料提供了一種新思路。

關(guān)鍵詞：組裝法；水鎂石基；氫氧化鎂阻燃劑；EVA；阻燃性能

Abstract:InviewoftheproblemthatEVA(ethylene-vinylacetatecopolymer)ispronetocombustionandreleaseoftoxicsubstancesunderhightemperatureconditions,thispaperusesassemblymethodtoprepareawater-likemagnesiumsilicate(Mg-Al-Si-O-H)ThemagnesiumhydroxideflameretardantisusedasaflameretardantforEVA.Firstly,themagnesiumhydroxidewascharacterizedbythermogravimetryanalysis(TGA)andFourierinfraredspectroscopy(FT-IR),andtheflameretardanteffectinEVAwastested.Theresultsshowedthatadding3wt%ofwater-basedmagnesiumsilicatehydroxideflameretardantcaneffectivelyimprovetheflameretardancyofEVA,andthethermalstabilityoftheflameretardantisgood.Atthesametime,thefracturemorphologyofEVA/water-basedmagnesiumsilicatehydroxidecompositematerialswasobservedbyscanningelectronmicroscopy(SEM),anditwasfoundthattheflameretardantcaneffectivelyfilltheporestructureofEVAandcombinewellwiththeEVAmatrix.Therefore,thisstudyprovidesanewideaforthedevelopmentofnewefficientflameretardantmaterials.

Keywords:Assemblymethod;water-basedmagnesiumsilicate;magnesiumhydroxideflameretardant;EVA;flameretardantperformanceTheassemblymethodofawater-basedmagnesiumsilicatehydroxideflameretardantwassuccessfullydeveloped.TheexperimentalresultsshowedthattheflameretardantperformanceoftheEVAcompositematerialwasgreatlyimprovedbyusingthisassemblymethod.Thetimeofflameretardancewassignificantlyprolonged,andthepeakheatreleaseratedecreasedsignificantly.ThethermalstabilityoftheEVAcompositematerialwaseffectivelyimprovedbythewater-basedmagnesiumsilicatehydroxideflameretardant.

SEManalysisshowedthattheflameretardantwaseffectivelyfilledintheporestructureofEVA,andthecompatibilitybetweentheflameretardantandEVAmatrixwasgreatlyimproved.Thesefindingsprovideanewideaforthedevelopmentofnewefficientflameretardantmaterials.

Insummary,theassemblymethodofawater-basedmagnesiumsilicatehydroxideflameretardantisaneffectivemethodforimprovingtheflameretardantperformanceofEVAcompositematerials.ThismethodcanprovidebetterthermalstabilityandflameretardanceforEVAmaterials,makingitapromisingsolutionforflameretardantapplicationsinthefutureFurthermore,thewater-basedmagnesiumsilicatehydroxideflameretardantassemblymethodhasadvantagesovertraditionalhalogen-basedflameretardants.Halogen-basedflameretardantshavebeenwidelyusedinmanyindustriesduetotheirhighflameretardancy.However,theyhavebeenproventobeharmfultohumanhealthandtheenvironment.Ontheotherhand,magnesiumsilicatehydroxide,beinganaturalmineral,haslowtoxicityandisenvironmentallyfriendly.

Moreover,theuseofwaterasasolventintheassemblyprocessofmagnesiumsilicatehydroxideflameretardantalsomakesitamoresustainableandcost-effectivesolution.Waterisacheapandabundantresource,andtheproductionofwater-basedflameretardantsgenerateslesswastecomparedtosolvent-basedmethods.

Additionally,theEVAcompositematerialproducedusingthewater-basedmagnesiumsilicatehydroxideflameretardantassemblymethodcanalsohaveimprovedmechanicalproperties.Thisisbecausemagnesiumsilicatehydroxideactsasareinforcingagent,enhancingthestiffnessandstrengthofthematerial.Therefore,theresultingEVAcompositematerialcanhavebetteroverallperformance,makingitsuitableforawiderrangeofapplications.

Inconclusion,thewater-basedmagnesiumsilicatehydroxideflameretardantassemblymethodhasshowngreatpotentialforimprovingtheflameretardantperformanceofEVAcompositematerials.Itisasustainable,cost-effective,andenvironmentallyfriendlysolutionthatcanprovidebetterthermalstability,flameretardance,andmechanicalpropertiestoEVAmaterials.Asthedemandforflameretardantmaterialscontinuestogrow,thismethodcanprovideaninnovativeandpromisingsolutionfortheindustryTheuseofflameretardantmaterialshasbecomeincreasinglycriticalinvariousindustries,especiallyinconstruction,electronics,andtransportation.Sincetheprimaryobjectiveofthesematerialsistopreventfireoutbreaks,ithasbecomeimperativetoensurethattheypossessthedesiredthermalstability,flameretardance,andmechanicalproperties.Thesecharacteristicsarecriticaltoensurethatthematerialscanwithstandafireoutbreakandlimitthespreadofflamesandsmoke.However,thechallengehasbeentodevelopacost-effectiveandenvironmentallyfriendlysolutionthatcanprovideoptimalflameretardantpropertiesforvariousmaterials.

Theemergingtechnologyoftheexfoliatedvermiculite-basedmagnesiumsilicatehydroxideflameretardantassemblyhasshowngreatpotentialinimprovingtheflameretardantperformanceofEVAcompositematerials.Themethodisbasedontheincorporationofexfoliatedvermiculite-basedmagnesiumsilicatehydroxideasaflameretardantintoEVAcompositematerials.Themethodinvolvestheassemblyofthemagnesiumsilicatehydroxidenanosheetsonthesurfaceofvermiculitelayers,whichcreatesanexcellentbarrierforheatandflamepropagation.Theassemblyprocessimprovestheefficiencyandeffectivenessoftheflameretardantagentasitprovidesalargersurfaceareafortheretardantagent.

Oneofthesignificantadvantagesofusingtheexfoliatedvermiculite-basedmagnesiumsilicatehydroxidemethodisthatitiscost-effectiveandenvironmentallyfriendly.Themethodutilizesreadilyavailablematerials,suchasvermiculiteandmagnesiumsilicatehydroxide,whichareabundantandcost-effective.Additionally,themethodiseasytoimplementanddoesnotrequirecomplexequipment,makingitaviablesolutionforsmallandmedium-scaleindustries.

Furthermore,theexfoliatedvermiculite-basedmagnesiumsilicatehydroxidemethodenhancesthemechanicalpropertiesoftheEVAcompositematerials.Thisisbecausethevermiculitelayersserveasareinforcingagent,whichimprovesthestiffnessandstrengthofthematerial.Theadditionofmagnesiumsilicatehydroxidefurtherenhancesthemechanicalpropertiesbyincreasingtheinterfacialadhesionbetweenthefillerandthepolymermatrix.

Theexfoliatedvermiculite-basedmagnesiumsilicatehydroxidemethodalsoimprovesthethermalstabilityofEVAcompositematerials.Theflameretardantagentactsasathermalbarrier,whichreducesheattransferandtheriskofignition.Thisresultsinmaterialsthatcanwithstandhighertemperaturesandwithstandfireoutbreaksformoreextendedperiods,providingampletimeforevacuationandminimizingdamagetopropertyandlossoflife.

Inconclusion,theexfoliatedvermiculite-basedmagnesiumsilicatehydroxideflameretardantassemblymethodprovidesasustainable,cost-effective,andenvironmentallyfriendlysolutionforimprovingtheflameretardantpropertiesofEVAcompositematerials.Thetechnologyofferstremendouspotentialfo