Likhomaretsi tsa lithaele ke lisebelisoa tsa bohlokoa kahong, li fana ka sekhomaretsi se tiisang lithaele ho li-substrates tse fapaneng. Leha ho le joalo, liqholotso tse kang ho pepeseha ha mocheso le ho qhibiliha ha leqhoa li ka senya botšepehi ba likhomaretsi tsena, tse lebisang ho hloleheng le mathata a sebopeho. Hydroxypropyl methylcellulose (HPMC) e hlahile e le tlatsetso e tšepisang ho ntlafatsa ho hanyetsa mocheso le botsitso ba ho qhibiliha ha li-adhesive tsa lithaele. Sengoliloeng sena se lekola mekhoa ea lintlafatso tsena, phello ea HPMC ts'ebetsong ea sekhomaretsi, le lintlha tse sebetsang tsa ho e kenyelletsa mefuteng.
Likhomaretsi tsa lithaele li phetha karolo ea bohlokoa mohahong oa sejoale-joale e le sekhomaretsi se kopanyang lithaele ho substrates tse kang konkreite, lehong kapa plasterboard. Likhomaretsi tsena li tlameha ho khona ho mamella maemo a sa tšoaneng a tikoloho, ho kenyelletsa le ho fetoha ha mocheso le ho pepeseha ha mongobo, ho netefatsa botšepehi ba nako e telele ba holim'a tile. Leha ho le joalo, li-adhesives tsa setso li ka thatafalloa ho boloka ts'ebetso ea tsona tlas'a mocheso o feteletseng kapa makhetlo a mangata a ho qhibiliha a leqhoa, e leng se lebisang ho hloleheng ha bond le ho tlosoa ha lithaele. E le ho rarolla mathata ana, bafuputsi le bahlahisi ba ntse ba hlahloba tšebeliso ea li-additives tse kang hydroxypropyl methylcellulose (HPMC) ho matlafatsa ho hanyetsa mocheso le ho tsitsisa ho qhibiliha ha li-adhesive tsa lithaele.
Tlhaloso ea sekhomaretsi sa lithaele
Pele o kenella ka karolo ea HPMC, hoa hlokahala ho utloisisa sebopeho le mesebetsi ea sekhomaretsi sa lithaele. Hangata li-binders tsena li na le motsoako oa samente ea Portland, aggregate e ntle, li-polymers le li-additives. Samente ea Portland e sebetsa e le setlamo sa mantlha, ha li-polymer li eketsa ho tenyetseha, ho khomarela le ho hanyetsa metsi. Keketso ea li-additives e ka fetola thepa e itseng joalo ka nako ea pheko, nako e bulehileng le rheology. Ts'ebetso ea li-adhesives tsa lithaele e hlahlojoa ho latela lintlha tse kang matla a tlamo, matla a ho kuta, ho feto-fetoha ha maemo le ho hanyetsa khatello ea tikoloho.
Mathata a Ts'ebetso ea Sekhomaretsi sa Lithaele
Leha ho na le tsoelo-pele ea theknoloji ea sekhomaretsi, ho kenya lithaelese ho ntse ho tobane le mathata a ka senyang ho tšoarella ha eona. Lintlha tse peli tsa bohlokoa ke ho pepeseha ha mocheso le ho qhibiliha ha leqhoa. Lithempereichara tse phahameng li potlakisa ts'ebetso ea sekhomaretsi, e bakang ho omella pele ho nako le ho fokotsa matla a tlamo. Ka lehlakoreng le leng, ho pepesehela mocheso o batang le ho qhibiliha ho ka etsa hore mongobo o kene 'me o atolose ka har'a lera la sekhomaretsi, e leng se etsang hore tile e theohe le ho petsoha. Liqholotso tsena li hloka nts'etsopele ea likhomaretsi tse nang le khanyetso e phahameng ea mocheso le maqhubu a ho qhibiliha.
Karolo ea HPMC ho ntlafatsa thepa ea sekhomaretsi
HPMC e tsoa ho selulose 'me e thahasella thepa ea eona e mengata ea thepa ea kaho. Ha e eketsoa ho li-adhesives tsa lithaele, HPMC e sebetsa joalo ka mofetoleli oa rheology, thickener, sesebelisoa sa ho boloka metsi, le sekhomaretsi. Sebopeho sa limolek'hule tsa HPMC se e nolofalletsa ho theha maqhama a hydrogen le limolek'hule tsa metsi, ho etsa gel ea viscous e ntlafatsang ts'ebetso le ho atolosa nako e bulehileng. Ho phaella moo, HPMC e ntlafatsa ho khomarela ka ho etsa filimi e sireletsang holim'a tile ea ceramic, e fokotsa ho kenngoa ha metsi, le ho matlafatsa tšebelisano pakeng tsa sekhomaretsi le substrate.
Mokhoa o ntlafalitsoeng oa ho hanyetsa mocheso
Ho eketsoa ha HPMC ho li-adhesives tsa lithaele ho ntlafatsa ho hanyetsa mocheso ka mekhoa e mengata. Taba ea pele, HPMC e sebetsa joalo ka sehatsetsi sa mocheso, e fokotsa phetiso ea mocheso ka lera la sekhomaretsi le ho fokotsa ho fetoha ha mocheso. Taba ea bobeli, HPMC e ntlafatsa ts'ebetso ea hydration ea likaroloana tsa samente mme e khothaletsa sebopeho sa gel ea hydrated calcium silicate (CSH), ka hona e ntlafatsa thepa ea mochini oa sekhomaretsi ka mocheso o phahameng. Ho feta moo, HPMC e fokotsa kotsi ea ho phatloha ha mocheso ka ho fokotsa shrinkage le khatello ea maikutlo ka hare ho matrix a sekhomaretsi.
Mekhoa ea morao-rao e ntlafetseng ea ho qhibiliha ha leqhoa
HPMC e bapala karolo ea bohlokoa ho ntlafatseng botsitso ba ho qhibiliha ha likhomaretsi tsa lithaele ka ho fokotsa litlamorao tse mpe tsa ho kenella ha mongobo le katoloso. Tlas'a maemo a leqhoa, HPMC e etsa mokoallo o sireletsang o thibelang ho kenella ha metsi ka har'a lera la sekhomaretsi. Ho feta moo, mofuta oa hydrophilic oa HPMC o e nolofalletsa ho boloka mongobo ka har'a matrix a sekhomaretsi. ix, thibela desiccation le ho boloka ho tenyetseha ha maemo nakong ea leqhoa-thaw cycles. Ho feta moo, HPMC e sebetsa joalo ka pore ea pele, e theha marang-rang a li-micropores tse amohelang katoloso ea metsi ntle le ho etsa hore thaele e senyehe kapa e phatlohe.
Phello ea HPMC ho thepa ea sekhomaretsi
Ho eketsoa ha HPMC ho ama thepa e fapaneng ea likhomaretsi tsa lithaele, ho kenyelletsa le viscosity, ho sebetsa, matla a tlamo le ho tšoarella. Maemo a phahameng a HPMC ka kakaretso a fella ka ho eketseha ha viscosity le ho ntlafatsa ho hanyetsa ho sag, ho lumella lits'ebetso tse otlolohileng le tse holimo ntle le ho putlama. Leha ho le joalo, litaba tsa HPMC tse fetelletseng li ka etsa hore matla a bond e fokotsehe le bolelele nakong ea khefu, ka hona, metsoako e hloka ho ntlafatsoa ka hloko. Ho feta moo, khetho ea sehlopha sa HPMC le boima ba limolek'hule e ama ts'ebetso ea sekhomaretsi tlasa maemo a fapaneng a tikoloho.
Lintlha tse sebetsang bakeng sa ho kopanya HPMC
Ha o kenyelletsa HPMC ho li-adhesives tsa lithaele, lintlha tse 'maloa tse sebetsang li tlameha ho nahanoa ho ntlafatsa ts'ebetso le ho netefatsa hore li lumellana le mekhoa e teng. Khetho ea limaraka tsa HPMC e lokela ho nahana ka lintlha tse kang viscosity, ho boloka metsi, le ho lumellana le lisebelisoa tse ling. Phatlalatso e nepahetseng ea likaroloana tsa HPMC ke ea bohlokoa ho fihlela ho ts'oana le ho thibela agglomeration ka matrix a sekhomaretsi. Ntle le moo, maemo a pheko, ho lokisoa ha substrate, le mekhoa ea ts'ebeliso e lokela ho fetoloa ho holisa melemo le ho fokotsa likotsi tse ka bang teng tsa HPMC.
Hydroxypropyl methylcellulose (HPMC) e na le monyetla o moholo oa ho matlafatsa ho hanyetsa mocheso le ho tsitsisa ha li-adhesive tsa lithaele tsa ceramic. Lintho tse ngata tse sebetsang tsa HPMC joalo ka mofetoleli oa rheology, sesebelisoa sa ho boloka metsi le sekhomaretsi se ntlafatsa ts'ebetso ea sekhomaretsi, ho khomarela le ho tšoarella maemong a thata a tikoloho. Ka ho utloisisa mekhoa ea ts'ebetso e ntlafetseng ea HPMC le ho sebetsana le lintlha tse sebetsang bakeng sa ho kenyelletsoa ha eona, bafuputsi le bahlahisi ba ka etsa li-adhesives tse matla, tse ka tšeptjoang haholoanyane tse netefatsang botšepehi ba nako e telele ba bokaholimo ba lithaele lits'ebetsong tse fapaneng tsa kaho.
Nako ea poso: Feb-28-2024