Txoj kev siv hluav taws xob ntawm lub cev ntawm lub cev ntawm cov polyurethane uas siv cov dej ntshiab los ua cov khoom nruab nrab. Nws muaj qhov zoo ntawm tsis muaj kev nyab xeeb, kev nyab xeeb thiab kev ntseeg tau, zoo heev kev sib xws, thiab kev hloov kho yooj yim.
Txawm li cas los xij, cov ntaub ntawv polyurethane kuj raug kev txom nyem los ntawm cov dej tsis zoo, kub tsis kam, thiab feem ntau yog qhov tsis muaj qhov sib txuas sib txuas.
Yog li ntawd, nws yog qhov tsim nyog los txhim kho thiab ua kom zoo dua cov khoom thov ntawm polyurethane los ntawm cov organic fluorosilicone, epoxy cob, acrylic ester, thiab nanomaterials.
Ntawm lawv, nanomention hloov polyurethane cov ntaub ntawv tuaj yeem txhim kho lawv cov cuab yeej siv ntau dua, hnav tsis kam, thiab thermal stability. Txoj kev hloov kho muaj xws li cov qauv sib xyaw ua ke, hauv hom-situ polymerization txoj kev, kev sib xyaw ua ke, thiab lwm yam.
Nano silica
Sio2 muaj ib qho cuab yeej sib tw uas muaj peb-seem, nrog cov pab pawg hydroxyl coob ntawm nws qhov chaw. Nws tuaj yeem txhim kho qhov kev nkag siab ntawm cov khoom sib xyaw tom qab tau ua ke nrog polyurethane los ntawm kev sib tw polyurethane, thiab kub tsis kam, etc. GUO li al. synthesized nano-siude2 hloov polyurethane siv hauv-situ polymerization. Thaum Sio2 cov ntsiab lus tau kwv yees li 2% (WT, pawg feem hauv qab no), cov shear viscosity thiab tev lub zog ntawm cov nplaum tau txhim kho. Piv nrog rau cov polyurethane ntshiab, qhov kub siab kuj thiab lub zog tensile kuj tau nce me ntsis ntxiv.
Nano zinc oxide
Nano zno muaj cov kev siv tshuab zog muaj zog, cov tshuaj tua kab mob hnyav, ua kom haum rau cov khoom siv nrog cov haujlwm tshwj xeeb. Awad li al. Siv nano positron txoj kev los tso cov Zno fillers rau hauv polyurethane. Txoj kev tshawb nrhiav pom tias muaj kev cuam tshuam sib cuam tshuam ntawm nanoparthans thiab polyurethane. Ua kom cov ntsiab lus ntawm Nano Zno zno ntawm 0 mus rau 5% nce lub khob hloov cua kub (tg) ntawm polyurethane, uas tau txhim kho nws qhov kev ruaj khov.
Nano calcium carbonate
Qhov kev sib cuam tshuam muaj zog ntawm nano caco3 thiab cov matrix tseem ua rau lub zog tensile lub zog ntawm polyurethane cov khoom siv. Gao et al. Thawj zaug hloov Nano-CACO3 nrog oleic acid, thiab tom qab ntawd npaj polyurethane / CACO3 los ntawm hauv-situ polymerization. Infrared (FT-IR) Kev kuaj mob uas tau qhia tias nanoparticles tau uniformly dispersed hauv matrix. Raws li kev xeem tshuab, nws tau pom tias polyurethane hloov nrog nanoparticles muaj ntau dua tensile muaj zog dua li cov polyurethane ntshiab dua li cov neeg huv huv siab dua.
Hoob
Graphene (g) yog tus qauv fawm kib uas tau sib khi los ntawm SP2 hybrid Orbitals, uas ua kom pom tseeb zoo tshaj plaws, thermal conductivity, thiab kev ruaj khov. Nws muaj lub zog siab, lub zog zoo, thiab yog qhov yooj yim khoov. WU li al. synthesized ag / g / pu nanocomposites, thiab nrog kev nce ntawm ag / g cov ntsiab lus ntawm cov khoom siv hluav taws xob txuas ntxiv txhim kho, thiab cov tshuaj tua kab mob antibacterial kuj tau nce raws li.
Cov Nanotubes
Cov Nanotubes (CNTs) yog ib-seem tubular nanomaterials txuas los ntawm Hexagons, thiab tam sim no yog ib qho ntawm cov ntaub ntawv nrog ntau cov ntawv thov. Los ntawm kev siv nws lub zog siab, kev ua haujlwm, thiab polyurethan no cov khoom, cov khoom siv hluav taws xob, thiab kev coj ua ntawm cov khoom tuaj yeem hloov kho. WU li al. Qhia tau CNTs los ntawm hauv-situ polymerization kom tswj cov kev loj hlob thiab tsim ntawm emulsion hais, ua kom cov cnected dispersed nyob rau hauv cov polyurethane latrix. Nrog rau cov ntsiab lus nce ntawm CNTs, lub zog tensile ntawm cov khoom siv sib xyaw tau zoo heev.
Peb lub tuam txhab muab cov fumed zoo silica,Los tiv thaiv hydrolysis cov neeg sawv cev (cov neeg sawv cev ntawm cov neeg sawv cev, Carbodiimide), UV nqus, thiab lwm yam, uas txhim kho kev ua tau zoo ntawm polyurethane.
Lub Sijhawm Post: Jan-10-2025