Saamaynta budada Emulsion dib loo cusboonaysiin karo ee Qaab dhismeedka slurry

Budada cinjirka ee dib loo cusboonaysiin karo waa walxo gelling organic ah oo caadi ahaan la isticmaalo oo lagu buufiyo-qallajinta emulsion polymerka leh alkolada polyvinyl sida kolloid ilaalin ah. Waxaa dib loogu kala firdhi karaa si siman biyaha si loo sameeyo emulsion marka ay la kulmaan biyaha. Ku darista budada cinjirka ee dib loo cusboonaysiin karo waxay wanaajin kartaa waxqabadka hoobiye sibidhka oo dhawaan la isku daray.

Sida ugu dhakhsaha badan walxaha sibidhka ku salaysan ee lagu daray budada cinjirka ah ee biyaha latex, falcelinta fuuq-celinta ayaa bilaabma, iyo xalka calcium hydroxide si dhakhso ah u gaaro saturation iyo crystals ayaa la soo dejiyey, isla mar ahaantaana, crystals ettringite iyo calcium silicate hydrate gels ayaa la sameeyay. Qaybaha adag waxaa lagu shubaa jel iyo qaybo sibidh ah oo aan biyo lahayn. Marka fal-celinta fuuq-celinta ay sii socoto, alaabooyinka fuuq-baxa ayaa kordha, qaybaha polymer-ka ayaa si tartiib tartiib ah ugu soo urura daloollada xididada, iyaga oo samaynaya lakab cufan oo dusha sare ah ee jelka iyo qaybaha sibidhka ee aan la nadiifin. Qaybaha polymer-ka ee la isku daray ayaa si tartiib tartiib ah u buuxiya daloollada, laakiin si buuxda uma aha dusha gudaha ee daloollada. Maaddaama biyaha ay sii yaraanayaan fuuq-baxa ama qalajinta, qaybaha polymer-ka ee si dhow u xirxiran ee jelka iyo daloollada ku jira waxay isku darsamaan filim joogto ah, samaynta isku-dhafka isdhexgalka oo leh koollada sibidhka ee fuuq-baxa iyo hagaajinta fuuq-celinta Isku-xidhka alaabta iyo isku-darka.

Sababtoo ah badeecooyinka fuuq-celinta ee leh polymers waxay sameeyaan lakab daboolaya is-dhexgalka, waxay saameyn kartaa korriinka ettringite iyo crystals calcium hydroxide; iyo sababta oo ah polymers-ku waxay isku ururiyaan filimada ku jira daloolada aagga kala-guurka interface, walxaha sibidhka polymer-ku-salaysan Aagga kala-guurka waa cufan. Kooxaha firfircoon ee molecules polymer-ka qaarkood waxay sidoo kale soo saari doonaan falcelin isku-dhafan oo leh Ca2 + iyo A13+ ee alaabada fuuq-celinta sibidhka si ay u sameeyaan curaarta buundada gaarka ah, hagaajinta qaabdhismeedka jireed ee walxaha ku salaysan sibidhka ee adag, yaraynta walbahaarka gudaha, iyo yaraynta jiilka microcracks.

Sida qaab-dhismeedka jelka sibidhka uu kobcayo, biyaha waa la wada baabbi'iyey, qaybaha polymer-ka ayaa si tartiib tartiib ah ugu xaddidan daloolada. Marka sibidhku sii fuuqbaxo, qoyaanka daloolada xididada ayaa hoos u dhacaya, qaybaha polymer-ka ayaa isku-darka dusha sare ee shayga fuuq-celinta sibidhka jelka/isku-darka walxaha sibidhka ee aan biyo lahayn iyo isku-darka, taas oo samaynaysa lakab joogto ah oo xidhxidhan oo leh daloolo waaweyn oo Buuxsan. oo leh qaybo polymer ah oo dhegdheg leh ama is-xabag ah.

Emulsion-ka kala firdhiyey ee budada cinjirka ah ee dib loo cusboonaysiin karo waxay samayn kartaa filim joogto ah oo aan biyo-milmi karin (jidhka shabakadda polymer) ka dib marka la qalajiyo, iyo tan hoose ee modules-lastic polymer body network waxay hagaajin kartaa waxqabadka sibidhka; Isla mar ahaantaana, molecule-ka polymer-ka Kooxaha polar-ka qaarkood ee sibidhka ayaa si kiimiko ah uga falceliya alaabada fuuq-celinta sibidhka si ay u sameeyaan buundooyin gaar ah, hagaajinta qaabdhismeedka jireed ee alaabta fuuq-celinta sibidhka, oo ay yareeyaan oo ay yareeyaan jiilka dildilaaca. Ka dib marka lagu daro budada cinjirka ee dib loo cusboonaysiin karo, heerka fuuq-celinta bilowga ah ee sibidhka ayaa hoos u dhacaya, filimka polymer-ka ayaa qayb ahaan ama gebi ahaanba duubi kara qaybaha sibidhka, si sibidhka si buuxda u fuuqbaxo oo sifooyinkeeda kala duwan loo wanaajiyo.