Karolo ea Hydroxypropyl Methylcellulose (HPMC) ho Lihlahisoa tse thehiloeng ho Gypsum

Hydroxypropyl methylcellulose (HPMC) ke tlatsetso e sebelisoang hangata lihlahisoa tse thehiloeng ho gypsum, e bapala karolo ea bohlokoa ho ntlafatseng ts'ebetso le thepa ea tsona. E kenella ka har'a tšusumetso ea HPMC ho thepa ea bohlokoa joalo ka ho sebetsa, ho boloka metsi, nako ea ho beha, nts'etsopele ea matla, le ho tšoarella ha lisebelisoa tse thehiloeng ho gypsum. litšebelisano pakeng tsa HPMC le li-constituents tsa gypsum li tšohloa, ho fana ka leseli mabapi le mekhoa e ka sehloohong ea katleho ea eona. Ho utloisisa karolo ea HPMC lihlahisoa tse thehiloeng ho gypsum ho bohlokoa bakeng sa ho ntlafatsa libopeho le ho fihlela litšobotsi tse lakatsehang tsa ts'ebetso.

1.Selelekela
Lihlahisoa tse thehiloeng ho Gypsum, ho kenyeletsoa samente, metsoako e kopaneng le thepa ea kaho, li sebelisoa haholo liindastering tse fapaneng joalo ka kaho, meaho le mekhabiso ea kahare. Lisebelisoa tsena li itšetlehile ka li-additives ho ntlafatsa tshebetso ea tsona le ho finyella litlhoko tse khethehileng tsa kopo. Har'a li-additives tsena, hydroxypropyl methylcellulose (HPMC) e hlahella e le motsoako o sebetsang ka mokhoa o fapaneng le o sebetsang oa gypsum formulations. HPMC ke non-ionic cellulose ether e nkiloeng ho selulose ea tlhaho, e tsebahalang haholo ka ho boloka metsi, ho tenya, le thepa ea rheological. Ka lihlahisoa tse thehiloeng ho gypsum, HPMC e bapala karolo e ngata ho ntlafatsa ts'ebetso, ho beha litšoaneleho, nts'etsopele ea matla, le ho tšoarella.

2.Mesebetsi le Melemo ea HPMC ho Lihlahisoa tse thehiloeng ho Gypsum
2.1 Ntlafatso ea Ts'ebetso
Ho sebetsa ke thepa ea bohlokoa ka thepa e thehiloeng ho gypsum, e amang boiketlo ba bona ba kopo le ho qeta. HPMC e sebetsa joalo ka rheology modifier, e fana ka boitšoaro ba pseudoplastic ho motsoako, ka tsela eo e ntlafatsa ho ata ha eona le bonolo ba ho sebetsana le eona. Ho eketsoa ha HPMC ho tiisa kabo e tšoanang ea metsi ho pholletsa le motsoako, ho fella ka ts'ebetso e matlafalitsoeng le kotsi e fokotsehileng ea karohano kapa mali.

2.2 Poloko ea Metsi
Ho boloka metsi a lekaneng ho bohlokoa bakeng sa ts'ebetso ea hydration le ho beha ka nepo lihlahisoa tse thehiloeng ho gypsum. HPMC e bonts'a thepa e ntle ea ho boloka metsi, e etsa filimi e sireletsang ho potoloha likaroloana tsa gypsum le ho thibela tahlehelo e potlakileng ea metsi ka ho fetoha mouoane. Nako ena e telele ea hydration e thusa kholo e nepahetseng ea kristale ea gypsum mme e matlafatsa matla le ho tšoarella ha thepa.

2.3 Ho beha Taolo ea Nako
Nako ea ho beha e laoloang e bohlokoa bakeng sa ho fihlela litšobotsi tse lakatsehang tsa ho sebetsa le ho netefatsa tlamahano e nepahetseng lits'ebetsong tse thehiloeng ho gypsum. HPMC e susumetsa boits'oaro ba gypsum ka ho liehisa ho qala ha kristale le ho eketsa nako ea ho beha. Sena se fana ka nako e lekaneng ea ho etsa kopo, ho phethoa le ho lokisa, haholo-holo mererong e meholo ea kaho moo ho hlokahalang ho sebetsa nako e telele.

2.4 Ntlafatso ea Matla
Keketso ea HPMC e ka ama thepa ea mochini le nts'etsopele ea matla ea lihlahisoa tse thehiloeng ho gypsum. Ka ho khothaletsa hydration e ts'oanang le ho fokotsa tahlehelo ea metsi, HPMC e kenya letsoho ho thehoeng ha matrix a gypsum a teteaneng le a momahaneng, e leng se etsang hore ho be le matla a matla a ho hatella, a tsitsipano le a flexural. Ho feta moo, phello ea matlafatso ea likhoele tsa HPMC ka har'a matrix ea gypsum e ntlafatsa le ho feta ho ts'epahala ha sebopeho le ho hana ho qhekella kapa ho senyeha.

2.5 Ntlafatso ea nako e telele
Ho tšoarella ke mokhoa oa mantlha oa ts'ebetso bakeng sa lisebelisoa tse thehiloeng ho gypsum, haholo lits'ebetsong tse tlas'a mongobo, ho fapana ha mocheso le khatello ea mochini. HPMC e ntlafatsa ho tšoarella ha lihlahisoa tsa gypsum ka ho ntlafatsa ho hanyetsa ho honyela, ho peperana le efflorescence. Ho ba teng ha HPMC ho thibela ho falla ha letsoai le qhibilihang 'me ho fokotsa kotsi ea bokooa ba holim'a metsi, kahoo ho lelefatsa bophelo ba tšebeletso le ho boloka boipiletso ba botle.

3.Litšebelisano pakeng tsa HPMC le Gypsum Constituents
Ho sebetsa hantle ha HPMC mekhoeng e thehiloeng ho gypsum ho bakoa ke tšebelisano ea eona le likarolo tse fapaneng tsa sistimi, ho kenyeletsoa likaroloana tsa gypsum, metsi le li-additives tse ling. Ha li kopanya, limolek'hule tsa HPMC li hydrate ebe li etsa sebopeho se kang gel, se koahelang likaroloana tsa gypsum ebe se kenya metsi ka har'a matrix. Tšitiso ena ea 'mele e thibela ho felloa ke metsi pele ho nako mme e khothaletsa kabo e tšoanang ea likristale tsa gypsum nakong ea ho beha le ho thatafala. Ho phaella moo, HPMC e sebetsa e le dispersant, fokotsa phatsa agglomeration le ho ntlafatsa homogeneity ea motsoako. Ho lumellana pakeng tsa HPMC le gypsum ho susumetsoa ke lintlha tse kang boima ba molek'hule, tekanyo ea ho fetola, le mahloriso a HPMC ha ho etsoa.

Lisebelisoa tsa HPMC ho Lihlahisoa tse thehiloeng ho Gypsum
HPMC e fumana lits'ebetso tse fapaneng ho gypsum-bas

Lihlahisoa tsa 4.ed, ho kenyelletsa:

Li-plaster le li-renders tsa bokaholimo ba mabota a kahare le kantle
Metsoako e kopaneng bakeng sa ho phethela ka mokhoa o se nang moeli oa likopano tsa gypsum board
Mekhabiso e ka tlas'a lefatše e ikemetseng le metsoako ea fatše
Mokhabiso oa ho bōpa le ho lahla thepa
Mefuta e ikhethang ea khatiso ea 3D le tlhahiso ea tlatsetso

Hydroxypropyl methylcellulose (HPMC) e bapala karolo ea bohlokoa ho ntlafatseng ts'ebetso le thepa ea lihlahisoa tse thehiloeng ho gypsum. Ka ts'ebetso ea eona e ikhethang, ho kenyelletsa ntlafatso ea ts'ebetso, ho boloka metsi, ho beha taolo ea nako, nts'etsopele ea matla, le ntlafatso ea nako e telele, HPMC e kenya letsoho ho thehoeng ha lisebelisoa tsa boleng bo holimo tsa gypsum bakeng sa lits'ebetso tse fapaneng. Ho utloisisa litšebelisano lipakeng tsa HPMC le likarolo tsa gypsum ho bohlokoa bakeng sa ho ntlafatsa libopeho le ho fihlela litšobotsi tse lakatsehang tsa ts'ebetso. Ka lipatlisiso tse tsoelang pele le boqapi, HPMC e ntse e tsoela pele ho hlaha e le tlatsetso ea bohlokoa ntlafatsong ea litharollo tse tsoetseng pele tse thehiloeng ho gypsum, tse hlokomelang litlhoko tse tsoelang pele tsa indasteri ea kaho le makala a amanang.