Hydroxypropyl Methylcellulose (HPMC) ke tlatsetso e fapaneng e sebelisoang hangata ho li-adhesives le li-grouts bakeng sa bokhoni ba eona ba ho ntlafatsa ts'ebetso le ts'ebetso. Thepa ea eona e kenya letsoho likarolong tse sa tšoaneng tsa mokhoa oa ho khomarela le oa grouting, o amang lintlha tse kang matla a ho kopanya, ho boloka metsi, nako e bulehileng, ho hanyetsa sag, le ho tšoarella ka kakaretso. Ho utloisisa hore na HPMC e sebetsa joang linthong tsena ho hloka ho hlahlobisisa sebopeho sa eona sa lik'hemik'hale, tšebelisano ea eona le metsi, le karolo ea eona lits'ebetsong tsa sekhomaretsi le tsa grouting.
Sebopeho sa Lik'hemik'hale sa HPMC:
HPMC ke cellulose ether e nkiloeng ho cellulose ea tlhaho, polysaccharide e fumanoang limela.
Sebopeho sa eona sa lik'hemik'hale se na le liketane tsa mokokotlo oa cellulose tse nang le hydroxypropyl le methyl substituent.
The degree of substitution (DS) ea lihlopha tsena e etsa qeto ea thepa ea HPMC, ho kenyelletsa le ho qhibiliha ha eona, matla a ho boloka metsi, le boitšoaro ba rheological.
Paballo ea Metsi:
HPMC e na le kamano e phahameng ea metsi ka lebaka la tlhaho ea eona ea hydrophilic, e etsa li-bonds tsa hydrogen le limolek'hule tsa metsi.
Likhomaretsing tsa lithaele, HPMC e sebetsa e le moemeli oa ho boloka metsi, e lelefatsa nako e bulehileng ea sekhomaretsi.
Nako ena e atolositsoeng e bulehileng e lumella ho sebetsa hantle le ho khomarela ho ntlafatsa ka ho thibela ho omisoa pele ho nako ea sekhomaretsi.
Matla a Ntlafetseng:
Ho ba teng ha HPMC ka likhomaretsi tsa lithaele le li-grouts ho ntlafatsa ts'ebetso ea bona ka ho ntlafatsa thepa ea bona ea rheological.
HPMC e sebetsa joalo ka sekhomaretsi le se tsitsitseng, e fana ka boitšoaro ba pseudoplastic ho sekhomaretsi kapa grout.
Pseudoplasticity ena e fokotsa ho theoha kapa ho thella nakong ea ts'ebeliso, e netefatsa tšireletso e ntle le ho ts'oana.
Matla a Matlafalitsoeng a Bonding:
HPMC e kenya letsoho ho matla a tlamahano ea likhomaretsi tsa lithaele ka ho ntlafatsa khokahano lipakeng tsa sekhomaretsi le substrate.
Mehaho ea eona ea ho boloka metsi e netefatsa hore ho na le metsi a lekaneng a lisebelisoa tsa samente, ho khothalletsa pholiso e nepahetseng le ho khomarela.
Ho feta moo, HPMC e ka fetola sebopeho sa sekhomaretsi, sa ntlafatsa thepa ea sona ea mochini le matla a sekhomaretsi.
Sag Resistance:
Sebopeho sa pseudoplastic sa HPMC se fana ka boitšoaro ba thixotropic ho likhomaretsi tsa lithaele le li-grouts.
Thixotropy e bua ka thepa ea ho se be le viscous e fokolang tlas'a khatello ea ho kuta le ho khutlela boemong bo phahameng ba viscosity ha khatello ea kelello e tlosoa.
Boitšoaro bona ba thixotropic bo ntlafatsa ho hanyetsa ha sag nakong ea ts'ebeliso e otlolohileng, ho thibela sekhomaretsi kapa grout ho thella tlase ho substrate pele e folisa.
Ho tšoarella le ho sebetsa:
HPMC e matlafatsa ts'ebetso le ts'ebetso ea likhomaretsi tsa lithaele le li-grouts ka ho fana ka matla a ho hanyetsa metsi le ho fokotseha ho fokolang.
Mehaho ea eona ea ho boloka metsi e fokotsa kotsi ea ho omisoa pele ho nako le mapetsong a ho honyela, e leng se bakang hore ho kenngoe e be matla le ho tšoarella nako e telele.
HPMC e ka kenya letsoho ho thehoeng ha li-microstructures tse teteaneng le tse ts'oanang, ho matlafatsa ho hanyetsa ho kenella ha mongobo le khatello ea mochine.
Hydroxypropyl Methylcellulose (HPMC) e bapala karolo ea bohlokoa ho likhomaretsi tsa lithaele le li-grouts ka ho ntlafatsa ts'ebetso ea tsona, matla a tlamahano, ho hanyetsa le ho tšoarella. Mehaho ea eona ea ho boloka metsi, e kopantsoe le litlamorao tsa eona tsa rheological, e e etsa tlatsetso e hlokahalang bakeng sa ho fihlela ts'ebetso e nepahetseng le boleng ba ho kenya lithaelese.
Nako ea poso: May-24-2024