Kev hloov kho lub cev yog feem ntau yog ib txoj hauv kev los txhim kho kev ua haujlwm ntawm cov nplaum los ntawm doping qee cov sau thiab cov khoom ntxiv nyob rau hauv qee yam kev mob thaum lub sijhawm npaj cov txheej txheem ntawm cov nplaum polyurethane. Quartz hmoov muaj qhov ua tau zoo nrog polyurethane nplaum txheej txheem, tuaj yeem txhim kho lub zog tensile, elongation thaum tawg, thiab tsim kua muag lub zog ntawm cov khoom lag luam polyurethane nplaum. Nano boron nitride (BN) yog ultrasonically dispersed hauv polyol, thiab tom qab ntawd reacted nrog MDI los npaj polyurethane nplaum zaj duab xis rau ntim khoom noj. Piv nrog rau cov nplaum tsis muaj nano-BN, dej tso pa tawm ntawm tus nqi ntawm zaj duab xis yog txo 50%, lub zog sib txuas tau nce los ntawm 37%, thiab lub zog ntawm kev ua kom muaj zog tuaj nce li 7.14%. Ntxiv SiO2 nanofibers rau polyurethane matrix pom tias cov pawg hydroxyl nyob rau saum npoo ntawm SiO2 nanofibers thiab polyurethane tsim cov qauv sib txuas uas nruj, uas txhim kho cov nplaum ntawm cov nplaum, qhov nyuaj ntawm zaj duab xis, thiab lub zog tensile, tab sis kuj nce viscosity ntawm cov colloid.
Kev hloov tshuaj yog ib hom qauv kev hloov pauv uas hloov cov hom atoms lossis atomic pawg ntawm cov qauv molecular thiab lawv txoj kev sib txuas ua ke los ntawm kev siv tshuaj polymer. Ntawm lawv, thaiv, txuas rau, thiab lwm yam yog siv ntau txoj kev hloov tshuaj siv rau cov tshuaj tiv thaiv kab mob polyurethane. Ntawm lawv, kev ua tau zoo epoxy resin-hloov polyurethane adhesives, acrylate-hloov polyurethane adhesives, thiab silicone resin-hloov polyurethane adhesives yog lub hom phiaj ntawm kev sib tw hauv kev lag luam. Epoxy resin muaj ntau qhov zoo xws li kev nplaum zoo, kev txhim kho corrosion, lub zog loj, thiab lwm yam, tab sis nws cov tawv tawv tsis zoo. Cov lus qhia ntawm epoxy pawg mus rau hauv polyurethane system tuaj yeem tau txais cov khoom lag luam nrog kev ua haujlwm zoo. Silane-hloov polyurethane nplaum yuav ua tsis tau tsuas yog txhim kho qhov hloov pauv yooj yim, tab sis kuj zam qhov tsis muaj qhov luv ntawm cov tsoos polyurethane nplaum uas yooj yim ua npuas dej tom qab kho thiab muaj cov nplaum tsis zoo rau cov substrates du.
