Waterborne polyurethane wani sabon nau'in tsarin polyurethane ne wanda ke amfani da ruwa maimakon abubuwan kaushi na halitta azaman matsakaici mai tarwatsawa. Yana da abũbuwan amfãni daga rashin gurbatawa, aminci da aminci, kyawawan kayan aikin injiniya, dacewa mai kyau, da sauƙi mai sauƙi.
Duk da haka, kayan polyurethane suma suna fama da ƙarancin juriya na ruwa, juriya na zafi, da juriya mai ƙarfi saboda rashin kwanciyar hankali na haɗin giciye.
Sabili da haka, ya zama dole don haɓakawa da haɓaka kayan aikin aikace-aikacen daban-daban na polyurethane ta hanyar gabatar da monomers masu aiki kamar Organic fluorosilicone, resin epoxy, acrylic ester, da nanomaterials.
Daga cikin su, nanomaterial modified polyurethane kayan iya muhimmanci inganta inji Properties, sa juriya, da thermal kwanciyar hankali. Hanyoyin gyare-gyare sun haɗa da hanyar haɗin kai, hanyar polymerization a cikin wuri, hanyar haɗakarwa, da dai sauransu.
Nano Silica
SiO2 yana da tsarin cibiyar sadarwa mai girma uku, tare da adadi mai yawa na ƙungiyoyin hydroxyl masu aiki a saman sa. Zai iya inganta cikakkun kaddarorin abubuwan da aka haɗa bayan an haɗa su tare da polyurethane ta hanyar haɗin gwiwa da ƙarfin van der Waals, irin su sassauci, tsayin daka da ƙananan zafin jiki, juriya na tsufa, da dai sauransu Guo et al. haɗe-haɗe nano-SiO2 da aka gyara polyurethane ta amfani da in-wurin hanyar polymerization. Lokacin da abun ciki na SiO2 ya kasance kusan 2% (wt, juzu'i mai yawa, iri ɗaya a ƙasa), ƙarfin juzu'i da ƙarfin kwasfa na manne an inganta ta asali. Idan aka kwatanta da polyurethane mai tsafta, babban juriya na zafin jiki da ƙarfin ƙwanƙwasa shima ya ƙaru kaɗan.
Nano Zinc oxide
Nano ZnO yana da ƙarfin injiniya mai ƙarfi, kyawawan ƙwayoyin cuta da bacteriostatic, kazalika da ƙarfin ƙarfi don ɗaukar radiation infrared da kariya ta UV mai kyau, yana sa ya dace da yin kayan aiki tare da ayyuka na musamman. Awad et al. yayi amfani da hanyar nano positron don haɗa filaye na ZnO cikin polyurethane. Binciken ya gano cewa akwai hulɗar haɗin gwiwa tsakanin nanoparticles da polyurethane. Ƙara abun ciki na nano ZnO daga 0 zuwa 5% ya ƙara yawan zafin jiki na gilashin (Tg) na polyurethane, wanda ya inganta kwanciyar hankali na thermal.
Nano Calcium Carbonate
Ƙaƙƙarfan hulɗar tsakanin nano CaCO3 da matrix yana haɓaka ƙarfin ƙarfi na kayan polyurethane. Gao et al. da farko gyara nano-CaCO3 tare da oleic acid, sa'an nan kuma shirya polyurethane/CaCO3 ta in-wuri polymerization. Gwajin Infrared (FT-IR) ya nuna cewa nanoparticles an tarwatsa su iri ɗaya a cikin matrix. Dangane da gwaje-gwajen aikin injiniya, an gano cewa polyurethane da aka gyara tare da nanoparticles yana da ƙarfi mai ƙarfi fiye da polyurethane mai tsabta.
Graphene
Graphene (G) wani tsari ne mai ɗorewa wanda aka haɗe ta hanyar SP2 hybrid orbitals, wanda ke nuna kyakkyawan aiki, ƙarfin zafi, da kwanciyar hankali. Yana da babban ƙarfi, mai kyau tauri, kuma yana da sauƙin tanƙwara. Wu et al. haɗakar Ag / G / PU nanocomposites, kuma tare da haɓakar abun ciki na Ag / G, kwanciyar hankali na thermal da hydrophobicity na kayan haɗin gwiwar sun ci gaba da ingantawa, kuma aikin ƙwayoyin cuta ya karu daidai da haka.
Carbon Nanotubes
Carbon nanotubes (CNTs) nau'ikan nanomaterial tubular masu girma ɗaya ne da ke haɗe da hexagons, kuma a halin yanzu ɗaya ne daga cikin kayan da ke da aikace-aikace iri-iri. Ta hanyar yin amfani da ƙarfinsa mai girma, ƙaddamarwa, da kayan haɗin gwiwar polyurethane, ana iya inganta kwanciyar hankali na thermal, kayan aikin injiniya, da ƙaddamar da kayan aiki. Wu et al. gabatar da CNTs ta hanyar in-wuri polymerization don sarrafa girma da samuwar emulsion barbashi, kunna CNTs da za a uniformly tarwatsa a cikin polyurethane matrix. Tare da karuwar abun ciki na CNTs, ƙarfin juzu'i na kayan haɗin gwiwar ya inganta sosai.
Kamfaninmu yana samar da Silica Fumed mai inganci,Ma'aikatan Anti-hydrolysis (ma'aikatan haɗin gwiwa, Carbodiimide), UV absorbers, da dai sauransu, wanda ke inganta aikin polyurethane mai mahimmanci.
Lokacin aikawa: Janairu-10-2025