Kev piav qhia txog cov ntaub ntawv ua npuas ncauj polyurethane: los ntawm microstructure mus rau macroscopic kev ua tau zoo
Ua ib qho ntawm cov khoom siv polymer siv dav tshaj plaws niaj hnub no, qhov sib txawv ntawm kev ua tau zoo ntawm polyurethane ua npuas ncauj feem ntau yog los ntawm cov qauv tsim sib txawv ntawm cov qauv pore. Txawm hais tias ua npuas ncauj kaw thiab ua npuas ncauj qhib muaj cov tshuaj sib xws, lawv qhia cov khoom sib txawv kiag li vim muaj qhov sib txawv ntawm microstructure, uas tsis tuaj yeem sib cais los ntawm kev tswj hwm meej ntawm polyurethane catalysts.
Tus yam ntxwv ntawm cov ua npuas ncauj kaw yog tias txhua lub npuas yog ib puag ncig los ntawm phab ntsa polymer tiav los tsim ib qho microstructure ywj pheej thiab kaw. Cov qauv no muab cov khoom siv zoo heev thermal rwb thaiv tsev (thermal conductivity feem ntau yog 0.018-0.028W / (m · K)) thiab lub zog siab (compression zog tuaj yeem ncav cuag 150-500kPa). Qhib-cell ua npuas ncauj ua tiav qhov kev ua tau zoo acoustic (NRC tuaj yeem ncav cuag 0.6-0.9) thiab huab cua permeability (huab cua ncig tus nqi tshaj 90%) los ntawm kev sib txuas pore network. Kev nkag siab txog cov txheej txheem tsim thiab kev ua tau zoo sib txawv ntawm ob lub npuas ncauj no yog qhov tseem ceeb rau kev xaiv cov txheej txheem catalyst thiab kev ua kom zoo dua ntawm cov txheej txheem ntau lawm.
Cov txheej txheem tshuaj lom neeg ntawm kev tsim cov qauv pore thiabcov tshuaj ua kom lub cev muaj zogkev tswj hwm
Mechanism ntawm kev tsim ua npuas ncauj kaw-cell
Kev tsim cov qauv kaw-cell yog ib qho txheej txheem sib npaug, uas feem ntau nyob ntawm peb yam tseem ceeb hauv qab no:
1. Tus nqi tsim roj: txiav txim siab los ntawm tus nqi tshuaj tiv thaiv ntawm isocyanate thiab dej (ua npuas dej ua rau muaj kev kub ntxhov)
2. Kev loj hlob ntawm lub zog ntawm polymer matrix: txiav txim siab los ntawm qhov kev ua haujlwm ntawm isocyanate thiab polyol (gel reaction)
3. Kev ruaj khov ntawm qhov chaw: tswj los ntawm cov nyhuv synergistic ntawm surfactant thiab catalyst
Thaum qhov kev ua haujlwm ntawm gel sai txaus, cov polymer matrix tuaj yeem tsim cov phab ntsa uas muaj zog txaus ua ntej lub siab sab hauv ntawm lub npuas ncav cuag qhov tseem ceeb, yog li ua kom cov qhov hws tsis hloov pauv. Peb cov ntaub ntawv sim qhia tau tias kev siv lub kaw lus catalyst tshwj xeeb tuaj yeem ua rau qhov ceev ntawm lub cell kaw ntau ntxiv los ntawm 85% mus rau ntau dua 95%, thiab cov coefficient thermal conductivity raug txo los ntawm 15-20% raws li.
Lub hauv paus ntsiab lus ntawm kev npaj ntawm cov ua npuas ncauj qhib-cell
Qhov kev tsim cov qauv qhib-cell nyob ntawm lub tshuab "window rupture" uas tswj tau zoo. Thaum ua tau raws li cov xwm txheej hauv qab no, phab ntsa cell yuav tawg raws sijhawm los tsim cov qauv qhib-cell:
- Qhov tshuaj tiv thaiv gel qeeb qeeb, yog li ntawd phab ntsa cell tseem ductile thaum lub sijhawm nthuav dav.
- Tus nqi tsim roj thiab tus nqi txhim kho lub zog polymer ncav cuag qhov piv zoo tshaj plaws
- Qhov kev nruj ntawm qhov chaw raug txo kom tsawg ntawm qhov tseem ceeb
Los ntawm kev kho qhov piv ntawm amine catalyst rau cov hlau catalyst, peb tuaj yeem tswj tau qhov sib piv ntawm lub cell qhib kom raug hauv qhov ntau ntawm 80-98% kom ua tau raws li cov kev xav tau ntawm daim ntawv thov sib txawv. Piv txwv li, cov ua npuas ncauj acoustic feem ntau xav tau qhov sib piv ntawm lub cell qhib ntau dua 92%, thaum cov ntaub ntawv lim dej yuav xav tau cov qauv qhib tag nrho.
Kev xaiv thiab kev ua kom zoo dua ntawmcov tshuaj ua kom lub cev muaj zoglub kaw lus
Lub kaw lus catalyst tshwj xeeb rau cov ua npuas ncauj kaw
Kev tsim cov ua npuas ncauj kaw-cell ua haujlwm siab yuav tsum tau sib npaug peb qhov kev cuam tshuam tseem ceeb:
1. Cov tshuaj ua npuas ncauj (tsim roj): triethylenediamine (TEDA) catalysts xws li MXC-102 feem ntau raug xaiv
2. Kev ua tshuaj gel (polymer tsim): Stannous octoate MXC-T12 series raug pom zoo
3. Kev ua kom trimerization (ua kom tsis txhob kub dhau): Cov tshuaj catalysts tshwj xeeb isocyanurate xws li MXC-15
Cov tshuaj catalysts sib xyaw ua ke MXC-CF200 series uas peb tau tsim yog tsim tshwj xeeb rau cov ntawv thov ua npuas ncauj kaw-cell thiab muaj cov yam ntxwv hauv qab no:
- Tus nqi kaw-cell ruaj khov ntawm ntau dua 93%
- Qhov hloov pauv ntawm qhov ntev <1.5% (70 ℃, 48h)
- Kev sib raug zoo meej nrog cov neeg sawv cev HFO
- Ua raws li cov qauv kev tiv thaiv hluav taws hauv kev lag luam kev tsim kho
Cov tshuaj catalyst tshwj xeeb rau kev ua npuas ncauj qhib
Tus yuam sij rau kev tsim cov ua npuas qhib-cell yog ncua qhov kev ua haujlwm gel thaum ua kom ntseeg tau tias muaj kev kho tom qab. Peb cov MXC-OF300 series muaj:
- Tswj tau qhov qhib porosity (85-99% adjustable)
- Kev ua kom rov qab zoo heev (pob rov qab zoo dua 65%)
- Cov yam ntxwv tsw qab tsawg (VOC < 50μg/m³)
- Kev sib raug zoo nrog cov nplaim taws retardants
Nws yog ib qho tseem ceeb tshwj xeeb uas peb cov catalyst MXC-OF350 tshiab tsim tau ua tiav kev tswj hwm qhov qhib cell qauv los ntawm kev siv lub tshuab ua haujlwm qeeb, daws tau qhov teeb meem kaw cell defect uas feem ntau pom hauv cov ua npuas dej siab.
Cov qauv kev txhim kho thev naus laus zis thiab cov kev daws teeb meem tshiab
Nrog rau cov kev cai ib puag ncig uas nruj zuj zus thiab ntau yam kev xav tau ntawm kev siv lub davhlau ya nyob twg, cov thev naus laus zis polyurethane catalyst tab tom ntsib cov teeb meem tshiab thiab cov cib fim tshiab:
1. Lub kaw lus ua npuas ncauj kaw uas muaj cua sov tsawg heev:
- Tsim cov catalysts uas phim cov tiam tshiab ntawm HFO blowing agents
- Nanocomposite catalytic technology txhim kho kev ruaj ntseg ntawm cov hlwb kaw
- Lub hom phiaj thermal conductivity: <0.018W / (m·K)
2. Kev siv tshuab ua npuas ncauj qhib-cell ntse:
- Kev tswj qhov qhib porosity gradient (porosity sib txawv hauv thaj chaw sib txawv)
- Lub kaw lus catalyst teb rau ib puag ncig
- Cov tshuaj ua npuas ncauj qhib uas siv tau dua tshiab
3. Cov kev daws teeb meem catalytic uas ruaj khov:
- Kev tsim cov tshuaj catalyst uas siv bio-based
- Lub kaw lus tso pa tawm VOC tsawg
- Kev siv tshuab kho kom sov tsawg (txuag hluav taws xob ntau dua 30%)
Kev txhawb nqa thiab kev pabcuam tshaj lij
Peb muab kev txhawb nqa kev txawj ntse rau cov chaw tsim khoom polyurethane thoob ntiaj teb:
- Kev pabcuam kuaj hauv chaw kuaj mob: muab daim ntawv qhia txog kev kuaj ua ntej hauv 72 teev
- Kev txhim kho kab ntau lawm: kev taw qhia txog kev siv tshuab thiab kev hloov kho cov txheej txheem
- Kev tsim kho tshwj xeeb: tsim cov txheej txheem catalyst tshwj xeeb raws li qhov xav tau tshwj xeeb
- Kev cob qhia txuj ci: Tsis tu ncua tuav cov kev cob qhia txog kev siv tshuab ua npuas ncauj thiab kev siv catalyst
Yog xav paub ntxiv txog kev siv tshuab lossis thov kev ntsuam xyuas dawb, thov hu rau peb pab neeg ua haujlwm los ntawm cov hauv qab no:
- Email: info@mingxuchem.com
- Lub Vev Xaib: https://www.mingxuchem.com/
Kev xaiv lub tshuab catalyst zoo yog ib kauj ruam tseem ceeb hauv kev ua kom zoo dua qub thiab txhim kho kev ua haujlwm ntawm cov khoom. Cia peb ua haujlwm ua ke los txhawb kev tsim kho tshiab ntawm cov thev naus laus zis polyurethane ua npuas ncauj.
Lub sijhawm tshaj tawm: Tsib Hlis-06-2025