Hydroxypropyl methylcellulose (HPMC) ke ether ea cellulose e feto-fetohang e sebelisoang haholo indastering ea kaho, haholo-holo mefuteng ea seretse se kopantsoeng ka metsi. Thepa ea eona e ikhethang e ntlafatsa ts'ebetso le ts'ebetso ea li-mortar, e tlatsetsa haholo katlehong ea tsona.
Sebopeho sa Lik'hemik'hale le Ts'ebetso
HPMC e nkiloe ho cellulose, polymer ea tlhaho e fumanoang maboteng a sele a limela. E hlahisoa ka ho etherification ea cellulose ka methyl chloride le propylene oxide. Ts'ebetso ena e nkela tse ling tsa lihlopha tsa hydroxyl molek'huleng ea cellulose sebaka ka lihlopha tsa methoxy (-OCH₃) le hydroxypropyl (-OCH₂CH(OH)CH₃). Tekanyo ea phetolo le karolelano ea lihlopha tsa methoxy ho hydroxypropyl li khetholla litšobotsi tse itseng tsa HPMC, tse kang ho qhibiliha, viscosity le thermal gelation.
Matlotlo a HPMC ka har'a Dry-Mix Mortar
1. Ho Boloka Metsi
HPMC e sebetsa hantle haholo ho bolokeng metsi ka har'a motswako oa seretse. Thepa ena ea ho boloka metsi e bohlokoa hobane e netefatsa hore samente e na le metsi a lekaneng, e ntlafatsa ts'ebetso ea ho e lokisa. Ho boloka metsi ho ntlafetseng ho lebisa ho sebetseng hantle le nako e telele ea ho bula, ho fokotsa kotsi ea ho oma pele ho nako, e leng se ka bakang ho fokotseha le ho petsoha. Ho phaella moo, e netefatsa phepelo e tsitsitseng ea metsi bakeng sa ho nosetsa samente, e ntlafatsa thepa ea mechini le matla a seretse.
2. Phetoho ea Rheology
HPMC e fetola haholo rheology ea li-dry-mix mortars. E sebetsa e le setenya, e eketsa viscosity ea motswako oa seretse. Thepa ena ea bohlokoa bakeng sa ho laola phallo le ho hasana ha seretse, e leng se etsang hore ho be bonolo ho se sebelisa holim'a libaka tse otlolohileng ntle le ho thella. E boetse e thusa ho fihlela mekhahlelo e boreleli le e ts'oanang nakong ea ts'ebeliso, e netefatsa ho khomarela le ho kopana hamolemo. Phetoho ea rheological ke HPMC e ntlafatsa litšobotsi tsohle tsa ts'ebetso le ts'ebeliso ea seretse.
3. Ntlafatso ea ho Khomarela
HPMC e ntlafatsa thepa ea sekhomaretsi sa li-dry-mix mortar. E ntlafatsa matla a tlamo pakeng tsa seretse le li-substrate tse fapaneng tse kang litene, konkreite le lithaele. Sena se bohlokoa haholo lits'ebetsong tse kang likhomaretsi tsa lithaele le litsamaiso tsa ho thibela mocheso oa kantle. Ho khomarela ho ntlafetseng ho fokotsa monyetla oa ho arohana le ho netefatsa ho tšoarella ha nako e telele ha seretse se sebelisitsoeng.
4. Ho sebetsa hantle le ho tsitsisa
E 'ngoe ea melemo ea mantlha ea HPMC ke ntlafatso ea ho sebetsa hantle le ho tsitsa ha li-dry-mix smorters. E lumella ho kopanngoa habonolo le ho sebelisoa hantle, e fana ka sebopeho se boreleli se bonolo ho se hasanya le ho se bopa. Ho sebetsa hantle ho ntlafalitsoeng ho fokotsa boiteko bo hlokahalang nakong ea ho sebelisa, ho etsa hore ts'ebetso e sebetse hantle le ho se sebelise haholo. E boetse e netefatsa kabo e ts'oanang ea seretse, e leng se lebisang ho liphethong tsa boleng bo holimo.
5. Ho Hlahisa Thermal Gelation
HPMC e bonts'a thepa ea ho futhumatsa ka mocheso, ho bolelang hore e etsa gel ha e futhumatsoa. Thepa ena e molemo lits'ebetsong moo ho hlokahalang ho hanyetsa mocheso. Nakong ea ts'ebeliso ea seretse, mocheso o hlahisoang o ka baka keketseho ea nakoana ea viscosity, e thusang ho boloka sebopeho le botsitso ba seretse se sebelisitsoeng. Hang ha mocheso o theoha, gel e khutlela boemong ba eona ba pele, e leng se lumellang ho tsoela pele ho sebetsa.
6. Ho Kena Moyeng
HPMC e ka hlahisa le ho tsitsisa dipululana tsa moya tse nyenyane ka hara motswako wa seretse. Ho kenngwa ha moya hona ho ntlafatsa ho hanyetsa ho hatsela ha seretse ka ho fana ka sebaka sa hore dikristale tsa leqhoa di atolohe, ho fokotsa kgatello ya kahare le ho thibela tshenyo. Ho feta moo, moya o kentsweng o ntlafatsa bokgoni ba ho sebetsa le ho pompa ha seretse, ho etsa hore ho be bonolo ho se sebedisa maemong a fapaneng.
7. Ho lumellana le Lisebelisoa tse Ling
HPMC e tsamaisana le mefuta e mengata e mengata ea li-additives tse sebelisoang hangata ka har'a li-dry-mix mortars, tse kang li-superplasticizers, li-retarder le li-accelerators. Ho lumellana hona ho lumella ho etsoa ha metsoako ea seretse e etselitsoeng uena ho fihlela litlhoko tse itseng tsa ts'ebetso. Mohlala, HPMC e ka sebetsa 'moho le li-superplasticizers ho ntlafatsa phallo ha e ntse e boloka viscosity e lakatsehang.
8. Ho Theha Lifilimi
HPMC e etsa filimi e tšesaane, e tenyetsehang ha e oma, e leng se tlatsetsang litšobotsing tsa bokaholimo ba seretse. Sebopeho sena sa filimi se thusa ho laola mouoane oa metsi le ho eketsa matla a bokaholimo le ho tšoarella ha seretse. E boetse e fana ka lera le sireletsang le ka ntlafatsang ho hanyetsa boemo ba leholimo le ho hanyetsa ho khoptjoa ha seretse se sebelisitsoeng.
9. Khanyetso ea Tikoloho
HPMC e fana ka khanyetso khahlanong le mabaka a fapaneng a tikoloho, ho kenyeletsoa mongobo, ho feto-fetoha ha mocheso, le ho pepesehela lik'hemik'hale. Khanyetso ena e bohlokoa bakeng sa ho tšoarella le ho phela nako e telele ha li-dry-mix mortar, haholo-holo maemong a thata kapa a feto-fetohang a tikoloho. E thusa ho boloka ts'ebetso le ponahalo ea seretse ka nako e telele, e fokotsa tlhoko ea tlhokomelo kapa litokiso khafetsa.
10. Tekanyo le Tšebeliso
Tekanyo ea HPMC ka har'a li-dry-mix store hangata e tloha ho 0.1% ho isa ho 0.5% ho latela boima ba motsoako o omileng. Tekanyo e itseng e itšetlehile ka thepa e lakatsehang le mofuta oa ts'ebeliso. Mohlala, litekanyo tse phahameng li ka sebelisoa ka har'a likhomaretsi tsa tile ho ntlafatsa ho khomarela le ho sebetsa hantle, ha litekanyo tse tlase li ka lekana bakeng sa li-dry-store tse sebelisoang ka kakaretso. Ho kenyelletsoa ha HPMC ka har'a motsoako o omileng ho bonolo, 'me ho ka qhalanngoa habonolo nakong ea ts'ebetso ea ho kopanya.
HPMC ke karolo ea bohlokoa ka har'a li-dry-mix mortar ka lebaka la litšobotsi tsa eona tse ngata tse sebetsang. Bokhoni ba eona ba ho boloka metsi, ho fetola rheology, ho ntlafatsa ho khomarela, ho ntlafatsa ho sebetsa hantle, le ho fana ka khanyetso ea tikoloho bo e etsa hore e be tlatsetso ea bohlokoa lits'ebetsong tse fapaneng tsa kaho. Ka ho utloisisa le ho sebelisa litšobotsi tsa motheo tsa HPMC, baetsi ba li-formulator ba ka etsa li-dry-mix mortar tse sebetsang hantle tse fihlelang litlhoko tse fapaneng tsa mekhoa ea kaho ea sejoale-joale.
Nako ea poso: Phuptjane-14-2024