Kev Tshawb Fawb Txog Kev Nyuaj Siab Mechanism ntawm Nano-Composite Flame Retardants ntawm Cov Khoom Siv Khoom

Nrog rau kev txhim kho ntawm cov ntaub ntawv tshawb fawb, cov tshuaj tua hluav taws nano-composite tau txais kev saib xyuas tseem ceeb hauv kev lag luam ntawm cov khoom siv hluav taws xob vim lawv cov txiaj ntsig zoo tshwj xeeb. Cov tshuaj tua hluav taws nano-composite ib txwm muaj xws li montmorillonite (MMT) thiab graphene tuaj yeem txhim kho cov khoom siv hluav taws xob ntawm cov ntaub ntawv thaum muaj cov teebmeem nyuaj rau lawv cov khoom siv kho tshuab. Kev nkag siab tob txog lawv cov txheej txheem cuam tshuam rau cov khoom siv yog qhov tseem ceeb heev rau kev txhim kho cov khoom siv hluav taws xob ua haujlwm siab.

Txheej txheem cej luam ntawm Nano-Composite Nplaim Retardants

Cov tshuaj tua hluav taws xob nano-composite yog hais txog cov tshuaj tua hluav taws xob uas muaj qhov loj me txog li nanometer. Lawv muaj cov yam ntxwv xws li thaj chaw tshwj xeeb siab thiab cov teebmeem me me. Piv nrog cov tshuaj tua hluav taws xob ib txwm muaj, lawv tuaj yeem ua rau muaj cov teebmeem tua hluav taws xob zoo ntawm qib ntxiv qis thiab txo cov teebmeem tsis zoo rau lwm yam khoom siv.

Montmorillonite yog txheej txheej silicate av nplaum ntxhia, thiab nws cov qauv lamellar endows nws nrog tshwj xeeb barrier zog. Exchangeable cations muaj nyob nruab nrab ntawm lamellae. Los ntawm kev sib pauv ion ions, cov organic cations tuaj yeem ua tswvcuab rau organomodification, txhim kho kev sib raug zoo nrog polymer matrices thiab ua kom muaj kev sib txawv ntau dua hauv cov polymers.

Graphene yog ob-dimensional carbon nanomaterial tsim los ntawm carbon atoms nrog sp² hybrid orbitals tsim ib hexagonal honeycomb lattice. Nws muaj cov cuab yeej zoo heev, thermal conductivity, thiab thaj chaw loj heev. Cov yam ntxwv no ua rau graphene muaj peev xwm zoo hauv kev txhim kho cov khoom siv kho tshuab thiab txhim kho cov nplaim hluav taws xob ua haujlwm.

 

Influence Mechanism ntawm nplaim taws Retardant Properties of Materials

Condensed-Phase Flame Retardant Mechanism

• Tsim Barrier Char LayerThaum lub sij hawm cov khoom combustion, cov qauv lamellar ntawm montmorillonite migrates thiab enriches nyob rau saum npoo ntawm lub polymer, tsim ib tug multi-layered tshav kub-resistant hard plhaub tiv thaiv txheej muaj li ntawm carbon-muaj aluminosilicate. Piv txwv li, nyob rau hauv polypropylene / montmorillonite nanocomposites, MMT lamellae maj mam tsiv mus rau cov khoom nto thaum lub sij hawm combustion los ua ib tug tuab barrier txheej, tiv thaiv kev khiav tawm ntawm combustible gases thiab influx ntawm sab nraud tshav kub, zoo li muab ib tug "fireproof tsho tiv no" ntawm cov khoom.
• Kev txhawb nqa ntawm Char FormationOb leeg montmorillonite thiab graphene tuaj yeem txhawb nqa cov tshuaj tiv thaiv charring ntawm polymers. Cov qauv lamellar ntawm montmorillonite tuaj yeem ua tus qauv rau kev tsim char, inducing kev txiav txim thiab carbonization ntawm polymer molecules ntawm nws nto. Lub siab thermal conductivity ntawm graphene tuaj yeem hloov cov cua kub sai sai, txo qhov kub ntawm lub polymer, txo qis thermal decomposition tus nqi, txhawb cov charring cov tshuaj tiv thaiv, nce tus nqi ntawm cov residual char, thiab yog li txhim kho cov nplaim retardant zog ntawm cov khoom.

Gas-Phase Flame Retardant Mechanism

• Dilution ntawm Combustible GasesQee cov nano-composite nplaim retardants decompose ntawm qhov kub thiab txias los tsim cov roj uas tsis yog-combustible xws li carbon dioxide thiab dej vapor. Cov roj no tuaj yeem dilute qhov concentration ntawm combustible gases nyob rau hauv combustion cheeb tsam, ua rau nws nyuaj rau combustion cov tshuaj tiv thaiv mus ntxiv. Piv txwv li, tej yam organomodified montmorillonites tso carbon dioxide thiab lwm yam gases nyob rau hauv high kub, txo cov ntsiab lus ntawm combustible gases thiab yog li inhibiting combustion.
• Radical TrapingGraphene muaj qhov ua haujlwm siab rau cov dawb radicals thiab tuaj yeem ntes cov dawb radicals tsim thaum lub sij hawm combustion, cuam tshuam cov dawb radical saw cov tshuaj tiv thaiv, txo cov nplaim hluav taws kub, thiab tua cov nplaim taws. Hauv cov roj theem, graphene tuaj yeem ntes cov dawb radicals zoo heev, tiv thaiv cov saw hlau xa mus ntawm cov dawb radicals thiab ua rau nws nyuaj rau kev txhawb nqa cov tshuaj tiv thaiv combustion.

Synergistic Nplaim Retardant Mechanism

Nano-composite nplaim retardants xws li montmorillonite thiab graphene kuj tuaj yeem tsim cov nplaim hluav taws sib xyaw nrog lwm cov nplaim hluav taws kub. Piv txwv li, thaum montmorillonite thiab phosphorus-muaj nplaim retardants koom ua ke ntxiv rau polymers, phosphorus-muaj nplaim retardants decompose los tsim phosphoric acid, metaphosphoric acid, thiab lwm yam, thaum combustion. Cov tshuaj no tuaj yeem txhawb nqa lub cev qhuav dej thiab carbonization ntawm cov polymers, thaum montmorillonite tsim ib txheej thaiv ntawm qhov chaw. Ob leeg ua hauj lwm ua ke los txhim kho cov nplaim retardant zoo ntawm cov khoom.

 

Influence Mechanism ntawm Mechanical Properties of Materials

Kev txhawb zog ntxiv

• Hloov kev ntxhov siabGraphene muaj cov khoom siv zoo heev, nrog lub zog 100 npaug ntawm cov hlau. Thaum tsis sib xws nyob rau hauv ib lub polymer matrix, graphene tuaj yeem ua rau muaj kev ntxhov siab sab nraud thiab hloov mus rau tag nrho cov matrix. Thaum lub sij hawm ncab, kev sib cuam tshuam ntawm cov nplooj ntawv graphene thiab cov saw hlau polymer ua rau muaj kev ntxhov siab tsis sib xws, yog li txhim kho lub zog tensile ntawm cov khoom.
• Kev txwv ntawm Molecular Chain MovementCov qauv lamellar ntawm montmorillonite tuaj yeem txwv txoj kev txav ntawm cov saw hlau molecular. Thaum cov polymer raug rau sab nraud quab yuam, cov qauv lamellar tuaj yeem cuam tshuam qhov zawv zawg thiab rov kho cov saw hlau molecular, ua kom cov khoom nruj, thiab yog li txhim kho cov elastic modulus ntawm cov khoom. Piv txwv li, nyob rau hauv nylon 6 / montmorillonite nanocomposites, lub xub ntiag ntawm MMT lamellae zoo txwv tsis pub txav ntawm nylon 6 molecular chains, ua kom cov elastic modulus ntawm cov khoom.

Toughening nyhuv

• Crack Deflection thiab PinningThaum cov khoom raug cuam tshuam, graphene lossis montmorillonite tuaj yeem ua rau tawg deflection thiab pinning. Thaum tawg tawg thiab ntsib ib daim ntawv graphene lossis daim ntawv montmorillonite, qhov tawg hloov nws txoj kev nthuav tawm vim yog kev sib cuam tshuam ntawm daim ntawv thiab cov matrix, siv zog ntau dua thiab yog li txhim kho qhov cuam tshuam toughness ntawm cov khoom.
• Txhim kho ntawm Interfacial CompatibilityOrganic hloov kho ntawm montmorillonite thiab kev hloov kho saum npoo ntawm graphene tuaj yeem txhim kho lawv cov kev sib raug zoo nrog cov polymer matrices. Kev sib raug zoo ntawm kev sib raug zoo tuaj yeem txhim kho lub zog sib txuas ntawm nano-fillers thiab matrix, ua kom muaj txiaj ntsig zoo rau kev hloov pauv kev ntxhov siab thiab yog li txhim kho cov khoom siv txhua yam ntawm cov khoom.

Kev Hloov Tsis Zoo

Yog hais tias nano-composite nplaim retardants yog unevenly dispersed nyob rau hauv lub polymer matrix, agglomerates yuav tsim. Agglomerates tsis tsuas yog ua tsis tau tsuas yog ua kom muaj zog ntxiv thiab toughening los tab sis kuj ua qhov tsis xws luag hauv cov khoom, yooj yim ua rau muaj kev ntxhov siab thaum muaj kev ntxhov siab, ua rau poob ntawm cov khoom siv kho tshuab. Tsis tas li ntawd, ntau ntxiv ntawm nano-composite nplaim retardants tuaj yeem cuam tshuam kev cuam tshuam ntawm cov saw hlau polymer, cuam tshuam rau kev ua haujlwm thiab cov khoom siv kho tshuab ntawm cov khoom.

 

Kev Tshawb Fawb Cov Ntaub Ntawv thiab Kev Tshawb Fawb Cov Ntaub Ntawv

Ntau qhov kev tshawb fawb tau lees paub qhov cuam tshuam ntawm nano-composite nplaim retardants ntawm cov khoom siv los ntawm kev sim. Hauv kev tshawb fawb ntawm epoxy resin / graphene nanocomposites, qhov sib ntxiv ntawm qhov tsim nyog ntawm graphene nce lub zog tensile los ntawm 30%, lub zog flexural los ntawm 25%, thiab qhov txwv qhov ntsuas oxygen (LOI) los ntawm 22% mus rau 28%, qhia txog kev txhim kho tseem ceeb hauv ob qho tib si txhua yam thiab nplaim hluav taws.

Rau montmorillonite-hloov cov ntaub ntawv polypropylene, thaum MMT ntxiv qib yog 3%, lub siab tshaj plaws tso tawm tus nqi ntawm cov khoom txo los ntawm 40%, UL-94 ntsug combustion ntsuam xyuas mus txog V-0, thiab elastic modulus ntawm cov khoom nce 20%.

Txawm li cas los xij, thaum nano-composite nplaim retardants yog unevenly dispersed los yog ntxiv nyob rau hauv ntau npaum li cas, cov kev ua tau zoo txhim kho cov nyhuv yuav tsis muaj zog los yog txawm qhia tsis zoo. Piv txwv li, nyob rau hauv ib txoj kev tshawb no, vim graphene agglomeration, qhov cuam tshuam lub zog ntawm cov khoom sib xyaw txo los ntawm 15%.

Xaus thiab Outlook

Cov tshuaj tua hluav taws xob Nano-composite xws li montmorillonite thiab graphene txhim kho cov khoom siv tua hluav taws xob ntawm cov ntaub ntawv los ntawm kev sib xyaw ua ke ntawm cov nplaim hluav taws xob, cov roj-theem nplaim hluav taws xob, thiab cov txheej txheem tua hluav taws xob synergistic, thaum ua rau muaj kev cuam tshuam rau cov khoom siv kho tshuab los ntawm cov txheej txheem xws li kev hloov pauv kev ntxhov siab, kev txwv ntawm kev txav mus los ntawm cov saw hlau, thiab kev tawg thiab pinning. Hauv kev siv ua haujlwm, kev hloov kho thiab kev faib tawm tsim nyog yog qhov yuav tsum tau siv tag nrho cov txiaj ntsig ntawm cov nplaim hluav taws xob nano-composite thiab zam kev cuam tshuam tsis zoo los ntawm kev sib sau ua ke thiab lwm yam teeb meem. Kev tshawb fawb yav tom ntej tuaj yeem tshawb nrhiav ntxiv cov kab ke sib xyaw ntawm cov nplaim hluav taws xob nano-composite nrog lwm cov nplaim hluav taws xob tshiab lossis cov ntaub ntawv ua haujlwm los tsim cov ntaub ntawv ua tau zoo nrog cov nplaim hluav taws xob zoo heev thiab cov khoom siv kho tshuab uas ua tau raws li qhov xav tau ntawm cov xwm txheej thov sib txawv.

Yog xav paub ntxiv txog phau ntawv qhia txog kev tshawb nrhiav txog cov txheej txheem cuam tshuam ntawm cov tshuaj nano-composite flame retardants rau cov khoom siv, koj tuaj yeem mus saib Deepmaterial ntawm https://www.adhesivesmanufacturer.com/ kom paub ntau ntxiv.