Titanate coupling agents yog ib chav kawm ntawm kev ua hauj lwm additives nrog tetravalent titanium atoms ua lub hauv paus, bridging inorganic fillers thiab organic polymers los ntawm ester pawg. Lawv qhov tshwm sim thiab kev loj hlob tshwm sim los ntawm qhov xav tau ceev hauv kev lag luam niaj hnub no rau kev hla -kev qhuab qhia kev sib koom ua ke ntawm cov khoom siv. Txij li thaum lawv cov kev taw qhia nyob rau hauv nruab nrab-20th caug xyoo, nrog kev nce ntawm cov ntaub ntawv polymer, cov ntaub ntawv sib xyaw, thiab kev lag luam tshuaj zoo, titanate coupling cov neeg ua haujlwm tau maj mam txav los ntawm chav kuaj mus rau cov ntawv thov kev lag luam, dhau los ua qhov nruab nrab tseem ceeb ntawm kev sib tshuam ntawm cov khoom siv tsis zoo thiab cov organic, thiab tuav txoj haujlwm tseem ceeb hauv cov ntaub ntawv science thiab engineering.
Qhov tsim ntawm qhov kev lag luam keeb kwm yav dhau los no yog hauv paus hauv kev loj hlob sai ntawm kev lag luam cov ntaub ntawv sib xyaw thiab cov kev txwv ntawm cov tsoos interface hloov kho thev naus laus zis. Inorganic fillers (xws li calcium carbonate, talc, thiab iav fiber) yog siv dav hauv cov yas, roj hmab, coatings, thiab lwm yam kev lag luam vim lawv cov nqi qis thiab kev ua haujlwm zoo. Txawm li cas los xij, qhov sib txawv polarity ntawm lawv thiab cov organic matrix ua rau tsis zoo ntawm kev sib raug zoo ntawm kev sib raug zoo, yooj yim ua rau muaj teeb meem xws li kev ntxhov siab, kev tsis sib haum xeeb, thiab kev ua haujlwm tsis zoo. Thaum silane coupling cov neeg ua haujlwm tau siv ua ntej, lawv muaj qhov tsis zoo hauv dej tsis kam, siab - qhov kub thiab txias, thiab kev sib raug zoo nrog tsis yog -polar resins. Titanate coupling agents, nrog rau lawv muaj peev xwm sib koom tes muaj peev xwm ntawm titanium atoms thiab saj zawg zog ester qauv tsim, muaj peev xwm ib txhij thauj tog rau nkoj inorganic nto thiab integrate rau hauv cov organic tes hauj lwm, zoo kov yeej no interfacial barrier thiab qhib ib tug tshiab tshooj nyob rau hauv industrial daim ntaub ntawv.
Los ntawm kev pom macro, kev txhim kho ntawm titanate coupling cov neeg ua haujlwm muaj kev tsav tsheb ob qho tib si ntawm cov khoom siv thiab kev txhim kho kev lag luam. Nyob rau theem kev ua tau zoo ntawm cov khoom siv, los ntawm kev txhim kho kev sib txuas ntawm lub zog sib txuas, nws txhim kho cov khoom siv kho tshuab (xws li lub zog tensile thiab kev cuam tshuam toughness), thermal stability, thiab huab cua tsis kam ntawm cov ntaub ntawv sib xyaw, thaum tseem txhim kho kev ua haujlwm fluidity thiab txo qhov system viscosity, ua rau tsim lub teeb yuag, siab - zog, thiab cov ntaub ntawv tawv. Nyob rau theem kev lag luam, nws daim ntawv thov nthuav dav qhov kev siv ntawm cov khoom siv tsis zoo hauv cov khoom siv hauv siab hauv siab - tus nqi- ntxiv cov teb, pab cov kev lag luam ib txwm muaj xws li yas, roj hmab, thiab cov coatings kom hloov mus rau qib siab - cov khoom kawg, thiab muab cov khoom tseem ceeb rau kev lag luam tawm tswv yim xws li lub zog tshiab (xws li, cov ntaub ntawv hluav taws xob lithium, lithium roj teeb sib cais). cov ntaub ntawv encapsulation), thiab biomedicine (xws li, kho pob txha scaffolds).
Tsis tas li ntawd, kev txhim kho ntawm titanate coupling tus neeg sawv cev kev lag luam echoes cov ntsiab lus niaj hnub ntawm kev tsim ntsuab thiab kev txhim kho kom ruaj khov. Los ntawm kev ua kom zoo ntawm cov qauv molecular thiab kev tshawb nrhiav cov txheej txheem ntsuab synthesis, hydrolysis-resistant, low- toxicity, thiab biodegradable cov khoom tau tshwm sim tas li, txo cov kev cuam tshuam ib puag ncig thaum tsim khoom thiab siv thaum ua tau raws li cov kev cai nruj, yog li tsav cov saw hlau rau qis - carbon thiab ncig txoj kev loj hlob.
Tam sim no, kev sib tw thoob ntiaj teb hauv kev lag luam cov ntaub ntawv tshiab tau nce zuj zus, thiab qhov kev thov rau kev hloov kho thev naus laus zis tau nce zuj zus. Raws li "tus choj molecular" txuas cov khoom siv tsis zoo thiab cov organic, titanate coupling cov neeg ua haujlwm tau nkag siab tob rau hauv kev nce qib hauv cov ntaub ntawv kev tshawb fawb thiab kev txhim kho cov kev xav tau ntawm kev lag luam. Lawv qhov tseem ceeb tau dhau los ntawm ib qho kev sib ntxiv, dhau los ua lub hauv paus tseem ceeb rau kev ua tiav kev ua haujlwm siab, kev ua haujlwm ntau, thiab kev ruaj khov hauv cov khoom siv niaj hnub no, thiab yuav txuas ntxiv txhawb nqa siab - kev txhim kho zoo ntawm kev tsim khoom lag luam.
