Ha ho etsoa pente, hydroxyethyl cellulose (HEC) ke motsoako o tloaelehileng oa motenya le rheology o ka ntlafatsang botsitso ba polokelo, boemo le thepa ea kaho ea lipente. E le ho kenya hydroxyethyl cellulose lipenteng le ho netefatsa hore e sebetsa ka katleho, mehato e itseng le litemoso li lokela ho lateloa. Mokhoa o khethehileng ke o latelang:
1. Thepa ea hydroxyethyl cellulose
Hydroxyethyl cellulose ke polima e qhibilihang ka metsing e se nang ionic e nang le thepa e ntle ea ho tenya, ho etsa filimi, ho boloka metsi, ho emisa le ho etsa emulsifying. Hangata e sebelisoa ka lipente tse thehiloeng metsing, li-adhesives, ceramics, inki le lihlahisoa tse ling. E fumanoa ka ho nkela karolo ea lihlopha tsa hydroxyl sebakeng sa ketane ea molek'hule ea cellulose ka lihlopha tsa hydroxyethyl, kahoo e na le ho qhibiliha ha metsi hantle.
Mesebetsi ea mantlha ea HEC ka lipente ke:
Phello e teteaneng: Eketsa viscosity ea pente, thibela pente ho thella, 'me e etse hore e be le thepa e ntle ea kaho.
Suspension effect: E ka qhalakanya le ho tsitsisa likaroloana tse tiileng joalo ka li-pigment le li-filler ho li thibela ho tsitsa.
Phello ea ho boloka metsi: Ntlafatsa ho boloka metsi a filimi ea ho roala, eketsa nako e bulehileng, 'me u ntlafatse phello ea ho kolobisa pente.
Taolo ea Rheology: lokisa mokelikeli le boemo ba ho roala, 'me u ntlafatse bothata ba letšoao la borashe nakong ea kaho.
2. Mehato ea tlatsetso ea hydroxyethyl cellulose
Mohato oa pele oa ho qhibiliha Ts'ebetsong ea 'nete, hydroxyethyl cellulose e hloka ho qhalakanngoa ka ho lekana le ho qhibiliha ka mokhoa oa pele oa ho qhibiliha. E le ho etsa bonnete ba hore selulose e ka phetha karolo ea eona ka botlalo, hangata ho kgothaletswa ho e qhaqha ka metsing pele, ho e-na le ho e eketsa ka ho toba ho seaparo. Mehato e khethehileng ke e latelang:
Khetha solvent e loketseng: hangata metsi a deionized a sebelisoa e le solvent. Haeba ho na le li-solvents tse ling tsamaisong ea ho roala, maemo a ho qhibiliha a lokela ho fetoloa ho ea ka thepa ea solvent.
Hanya butle-butle hydroxyethyl cellulose: Butle-butle le ka ho lekana, fafatsa phofo ea hydroxyethyl cellulose ha u ntse u sisinya metsi ho thibela agglomeration. Lebelo le susumetsang le lokela ho lieha ho qoba ho fokotsa sekhahla sa ho qhibiliha ha selulose kapa ho etsa "colloids" ka lebaka la matla a mangata a ho kuta.
Phallo e emeng: Kamora ho fafatsa selulose ea hydroxyethyl, e hloka ho tloheloa hore e eme nako e itseng (hangata metsotso e 30 ho isa ho lihora tse 'maloa) ho netefatsa hore selulose e ruruhile ka botlalo mme e qhibiliha ka metsing. Nako ea ho qhibiliha e itšetlehile ka mofuta oa selulose, mocheso oa solvent le maemo a susumetsang.
Fetola mocheso oa ho qhibiliha: Ho eketsa mocheso ho thusa ho potlakisa ts'ebetso ea ho qhibiliha ha hydroxyethyl cellulose. Hangata ho kgothaletswa ho laola mocheso wa tharollo pakeng tsa 20 ℃-40 ℃. Mocheso o phahameng haholo o ka baka ho senyeha ha cellulose kapa ho senyeha ha tharollo.
Ho fetola boleng ba pH ea tharollo Ho qhibiliha ha hydroxyethyl cellulose ho amana haufi-ufi le pH ea tharollo. Hangata e qhibiliha hamolemo tlas'a maemo a sa nke lehlakore kapa a alkaline hanyenyane, ka boleng ba pH pakeng tsa 6-8. Nakong ea ts'ebetso ea ho qhibiliha, boleng ba pH bo ka fetoloa ka ho eketsa ammonia kapa lintho tse ling tsa alkaline ha ho hlokahala.
Ho eketsa tharollo ea hydroxyethyl cellulose tsamaisong ea ho roala Ka mor'a ho qhibiliha, eketsa tharollo ea ho roala. Nakong ea ts'ebetso ea ho eketsa, e lokela ho eketsoa butle-butle le ho tsosoa ka ho tsoelang pele ho etsa bonnete ba ho kopanya ho lekaneng le matrix a ho roala. Nakong ea ts'ebetso ea ho kopanya, hoa hlokahala ho khetha lebelo le ts'oanelang le loketseng ho latela mekhoa e fapaneng ea ho thibela tsamaiso ho tloha ho foaming kapa ho senyeha ha cellulose ka lebaka la matla a mangata a ho kuta.
Ho fetola viscosity Ka mor'a ho eketsa hydroxyethyl cellulose, viscosity ea ho roala e ka laoloa ka ho fetola chelete e kenyelletsoeng. Ka kakaretso, palo ea selulose ea hydroxyethyl e sebelisitsoeng e pakeng tsa 0.3% -1.0% (e amanang le boima ba kakaretso ea ho roala), 'me chelete e itseng e kenyelletsoeng e hloka ho fetoloa ka liteko ho latela litlhoko tsa tlhahiso ea ho roala. Keketso e phahameng haholo e ka etsa hore seaparo se be le viscosity e phahameng haholo le ho fokola ha metsi, ho ama ts'ebetso ea kaho; athe tlatsetso e sa lekaneng e kanna ea se khone ho bapala karolo ea ho tenya le ho emisa.
Etsa liteko tsa botsitso le ho boloka botsitso Ka mor'a ho eketsa hydroxyethyl cellulose le ho lokisa mokhoa oa ho roala, ts'ebetso ea kaho ea ho roala e lokela ho lekoa, ho kenyelletsa le boemo, sag, taolo ea matšoao a borashe, joalo-joalo. shebella sedimentation ea ho roala ka mor'a ho ema nako e itseng, ho fetoha ha viscosity, joalo-joalo, ho hlahloba botsitso ba hydroxyethyl cellulose.
3. Litlhokomelo
Thibela agglomeration: Nakong ea ts'ebetso ea ho qhibiliha, hydroxyethyl cellulose e bonolo haholo ho monya metsi le ho ruruha, kahoo e hloka ho fafatsoa ka metsing butle-butle le ho etsa bonnete ba ho ts'oara ho lekaneng ho thibela ho thehoa ha maqhubu. Ena ke sehokelo sa bohlokoa ts'ebetsong, ho seng joalo e ka ama sekhahla sa ho qhala le ho ts'oana.
Qoba matla a phahameng a ho kuta: Ha o eketsa selulose, lebelo le susumetsang ha lea lokela ho ba holimo haholo ho qoba ho senya ketane ea molek'hule ea cellulose ka lebaka la matla a mangata a ho kuta, e leng se bakang ho fokotseha ha ts'ebetso ea eona e teteaneng. Ho phaella moo, tlhahisong e latelang ea ho roala, tšebeliso ea thepa e phahameng ea ho kuta e boetse e lokela ho qojoa ka hohle kamoo ho ka khonehang.
Laola mocheso oa ho qhibiliha: Ha u qhala hydroxyethyl cellulose, mocheso oa metsi ha oa lokela ho ba holimo haholo. Ka kakaretso ho kgothaletswa ho e laola ho 20 ℃-40 ℃. Tlas'a maemo a phahameng a mocheso, selulose e ka 'na ea fokotseha, ea fella ka ho fokotseha ha phello ea eona e teteaneng le viscosity.
Polokelo ea Tharollo: Litharollo tsa Hydroxyethyl cellulose hangata li hloka ho lokisoa le ho sebelisoa hang-hang. Ho boloka nako e telele ho tla ama viscosity le botsitso ba eona. Hangata ho kgothaletswa ho lokisetsa tharollo e hlokahalang letsatsing la tlhahiso ea pente ho boloka ts'ebetso ea eona e nepahetseng.
Ho eketsoa ha selulose ea hydroxyethyl ho pente hase feela mokhoa o bonolo oa ho kopanya 'mele, empa hape o hloka ho kopanngoa le litlhoko tsa sebele tsa ts'ebetso le litlhaloso tsa ts'ebetso ho netefatsa hore thepa ea eona e teteaneng, ea ho emisa le ho boloka metsi e sebelisoa ka botlalo. Nakong ea ts'ebetso ea ho eketsa, ela hloko mohato oa pele ho ho qhibiliha, taolo ea mocheso oa ho qhibiliha le boleng ba pH, le ho kopanya ka ho feletseng ka mor'a ho eketsa. Lintlha tsena li tla ama ka ho toba boleng le botsitso ba ts'ebetso ea pente.
Nako ea poso: Sep-19-2024