Likhomaretsi tsa lithaele li bohlokoa kahong le ntlafatsong, li fana ka maqhama lipakeng tsa lithaele le substrate. Likhomaretsi tsena li tlameha ho bonts'a mefuta e mengata ea thepa, ho kenyelletsa le ho sebetsa, ho boloka metsi le matla a ho khomarela. E 'ngoe ea likarolo tsa bohlokoa tse ntlafatsang thepa ena ke derivatives ea cellulose. Cellulose, polymer ea tlhaho e fumanehang marakong a lisele tsa limela, e fetotsoe ka lik'hemik'hale ho hlahisa lihlahisoa tse kang methyl cellulose (MC) le hydroxypropyl methylcellulose (HPMC), tse sebelisoang haholo ho li-adhesives tsa lithaele.
Thepa ea Cellulose Derivatives
Li-derivatives tsa cellulose tse sebelisoang likhomaretsing tsa lithaele haholo-holo ke li-polymers tse qhibilihang ka metsing tse bontšang thepa e ikhethang:
Tšireletso ea Metsi: Li ka tšoara metsi a mangata, e leng a bohlokoa bakeng sa ho phekola sekhomaretsi.
Thickening Agent: Ba eketsa viscosity ea motsoako oa sekhomaretsi, ho netefatsa ts'ebetso e nepahetseng le ho fokotsa ho fokotseha.
Tlhahiso ea Lifilimi: Ba etsa filimi e tšesaane ha ba omisa, e leng se tlatsetsang matla a tlamahano le ho fetoha ha sekhomaretsi.
Phetoho ea Rheology: Ba fetola litšobotsi tsa phallo ea sekhomaretsi, ba ntlafatsa ts'ebetso ea eona le boiketlo ba ts'ebeliso.
Mesebetsi ea Cellulose ka Sekhomaretsi sa Lithaele
1. Ho Boloka Metsi
E 'ngoe ea mesebetsi e ka sehloohong ea lihlahisoa tsa selulose ka sekhomaretsi sa lithaele ke ho boloka metsi. Nakong ea phekolo ea li-adhesives tse thehiloeng ho samente, ho ba teng ha metsi a lekaneng ho bohlokoa bakeng sa karabelo ea hydration. Li-derivatives tsa cellulose li monya le ho boloka metsi, butle-butle li a lokolla ho netefatsa hore metsi a phetse hantle. Ho lokolloa hona ho laoloang ha metsi ho ntlafatsa matla le ho tšoarella ha sekhomaretsi sa sekhomaretsi.
Pheliso e Ntlafetseng: Ka ho boloka metsi, lihlahisoa tsa cellulose li thibela ho omisoa pele ho nako, e leng se ka lebisang ho folisa ho sa fellang le litlamo tse fokolang.
Nako e Atolositsoeng ea ho Bula: Sekhomaretsi se lula se sebetsa nako e telele, se lumella hore ho be le liphetoho nakong ea ho beoa ha lithaele.
2. Ntlafatso ea ho sebetsa
Li-derivatives tsa cellulose li ntlafatsa ts'ebetso ea li-adhesive tsa lithaele ka ho fetola thepa ea tsona ea rheological. Motsoako oa sekhomaretsi o fetoha o momahaneng haholoanyane mme o bonolo ho jala, o fokotsa boiteko le nako nakong ea kopo.
Smooth Application: The viscosity e ntseng e eketseha e thibela ho theoha le ho thella, haholo-holo libakeng tse otlolohileng.
Tšebeliso e ntlafetseng: Sekhomaretsi se hasana ka mokhoa o ts'oanang, se netefatsa hore se koahetsoe ka ho feletseng le ho khomarela hamolemo.
3. Ntlafatso ea ho khomarela
Li-derivatives tsa cellulose li kenya letsoho molemong oa ho khomarela li-adhesive tsa lithaele. Bokhoni ba ho etsa lifilimi ba li-polymer tsena bo tiisa maqhama a matla pakeng tsa tile le substrate.
Bond Strength: Filimi e tšesaane e entsoeng ka lihlahisoa tsa cellulose e ntlafatsa matla a ho kopanya le ho khomarela.
Ho feto-fetoha ha maemo: Sekhomaretsi se lula se feto-fetoha, se amohela mekhoa e menyenyane le ho fokotsa kotsi ea ho tlosoa ha lithaele.
4. Thickening Agent
Joalo ka li-thickening agents, li-derivatives tsa cellulose li eketsa viscosity ea likhomaretsi tsa lithaele. Sena ke sa bohlokoa ka ho khetheha bakeng sa ho boloka botsitso bo nepahetseng le botsitso ba motsoako oa sekhomaretsi.
Ho lumellana: Motsoako o teteaneng oa sekhomaretsi o lula o le mong, o thibela ho arohana ha likarolo.
Botsitso: Ho eketseha ha viscosity ho fokotsa monyetla oa hore sekhomaretsi se sebetse kapa se rothoe, se etsa hore se tšoanelehe bakeng sa lits'ebetso tse otlolohileng le tse otlolohileng.
5. Sag Resistance
Lits'ebetsong tse kenyelletsang libaka tse otlolohileng, joalo ka ho kenya lithaele tsa lebota, ho hanyetsa sag ho bohlokoa. Li-derivatives tsa cellulose li matlafatsa khanyetso ea sekhomaretsi sa lithaele, ho netefatsa hore lithaele li lula li le teng nakong ea ts'ebetso le ka mor'a kopo.
Lisebelisoa tse Otlolohileng: Sekhomaretsi se lula se le teng ntle le ho thella, se fana ka ts'ebetso e matla ea pele le ho fokotsa tlhoko ea ts'ehetso ea mochini.
Botenya bo sa Tšoaneng: Sekhomaretsi se boloka botenya bo sa fetoheng, bo bohlokoa bakeng sa ho fihlela bokaholimo ba lithaele tse lekanang.
6. Nako e Bulehileng e Ntlafetseng le ho Fetoha
Li-cellulose derivatives li eketsa nako e bulehileng ea li-adhesives tsa lithaele, nako eo ka eona lithaele li ka lokisoang ntle le ho senya matla a tlamahano. Sena se molemo ka ho khetheha mererong e meholo moo ho hlokahalang hore ho behoe ka nepo.
Phetoho: Nako e telele e bulehileng e lumella hore lithaele li behoe bocha ho etsa bonnete ba hore li tsamaisana hantle le sebaka.
Litšila tse Fokotsoeng: Sekhomaretsi ha se behe kapele, se fokotsa litšila le ho netefatsa tšebeliso e nepahetseng ea thepa.
Mefuta ea Li-Derivatives tsa Cellulose tse Sebelisitsoeng ka Sekhomaretsi sa Lithaele
Ho na le mefuta e 'maloa ea lintho tse tsoang ho selulose e sebelisoang hangata ho likhomaretsi tsa lithaele, e' ngoe le e 'ngoe e fana ka melemo e ikhethang:
1. Methyl Cellulose (MC)
Ho qhibiliha ha Metsi: MC e qhibiliha ka metsing, ho etsa tharollo e hlakileng, e hlakileng e ntlafatsang ho boloka metsi le ho sebetsa.
Thermal Gelation: MC e bonts'a thepa ea ho futhumatsa e futhumatsang, ho bolelang hore e chesa ha e futhumatsa ebe e khutlela tharollong ha e pholile, e thusa ho boloka botsitso ba sekhomaretsi tlas'a mocheso o fapaneng.
2. Hydroxypropyl Methylcellulose (HPMC)
Thepa e Ntlafetseng: HPMC e fana ka ntlafatso ea ho boloka metsi, ho khomarela, le thepa ea ho etsa lifilimi ha e bapisoa le MC.
Mefuta-futa: E sebelisoa haholo mekhoeng e fapaneng ka lebaka la ho leka-lekana ha eona ho teteaneng, ho boloka metsi, le litšobotsi tsa ho khomarela.
3. Hydroxyethyl Cellulose (HEC)
Katleho e Matla: HEC ke setenya se sebetsang hantle, se fanang ka viscosity e phahameng esita le maemong a tlase.
Taolo ea Rheological: E ntlafatsa phallo le thepa ea sekhomaretsi, e ntlafatsa boiketlo ba ts'ebeliso.
Li-derivatives tsa cellulose li bapala karolo ea bohlokoa ts'ebetsong le ts'ebetsong ea likhomaretsi tsa lithaele. Bokhoni ba bona ba ho boloka metsi, ho ntlafatsa ts'ebetso, ho ntlafatsa ho khomarela, le ho fana ka khanyetso ea ho sag ho etsa hore e be tsa bohlokoa mekhoeng ea sejoale-joale ea kaho. Ho kenyelletsoa ha lintho tse tsoang ho cellulose tse kang methyl cellulose, hydroxypropyl methylcellulose, le hydroxyethyl cellulose ho netefatsa hore li-adhesives tsa lithaele li finyella litlhoko tse hlokahalang tsa ho tšoarella, boiketlo ba tšebeliso, le ts'ebetso ea nako e telele. Ha mekhoa ea kaho e ntse e tsoela pele ho fetoha, bohlokoa ba li-polymer tsena tse feto-fetohang ka har'a likhomaretsi tsa lithaele li tla lula li le bohlokoa, e leng se tla tlatsetsa ntlafatsong ea thepa ea mohaho le mekhoa.
Nako ea poso: Jun-05-2024