Hydroxyethyl cellulose (HEC) ke ether e qhibilihang ka metsing e seng ionic cellulose. E sebelisoa haholo ka liphahlo tse entsoeng ka metsi ka lebaka la thepa ea eona e ntle ea ho teteka, emulsifying, ho etsa filimi le ho emisa. E le motenya le stabilizer ho li-coatings, HEC e ka ntlafatsa haholo thepa ea rheological le pente ea ho penta.
1. Mesebetsi e ka sehloohong ea hydroxyethyl cellulose
Lirapeng tse thehiloeng metsing, mesebetsi e ka sehloohong ea HEC e bontšoa ka lintlha tse latelang:
Phello e matlafatsang: HEC e na le matla a matla a ho tiisa, a ka ntlafatsang ka katleho bokhoni ba viscosity le ho emisoa ha liphahlo tse thehiloeng metsing le ho thibela li-pigments le li-fillers tse ka har'a seaparo hore li se ke tsa lula.
Ntlafatsa rheology: HEC e ka fetola mokelikeli ka liphahlo tse entsoeng ka metsi e le hore e bontše viscosity e tlaase tlas'a ho kuta e phahameng, ho etsa hore ho be bonolo ho jala ha ho penta, ha ho ntse ho bontša viscosity e phahameng tlas'a maemo a tsitsitseng, kahoo ho fokotsa ho phalla ha pente. ketsahalo e leketlileng.
Botsitso bo ntlafetseng: HEC e na le khanyetso e ntle ea ho qhibiliha ha leqhoa le botsitso ba polokelo, e ka lelefatsang nako ea nako ea liphahlo le ho netefatsa botsitso libakeng tse fapaneng.
Ntlafatsa thepa ea ho etsa lifilimi: HEC e etsa filimi e feto-fetohang ka mor'a hore pente e omelle, e ntlafatsa ho khomarela le ho apara ho hanyetsa filimi ea pente le ho ntlafatsa ts'ebetso ea tšireletso ea pente.
2. Mokhoa oa ho sebelisa HEC
Ha u sebelisa HEC ka liphahlo tse thehiloeng metsing, mekhoa ea ho hasana le ea ho qhibiliha le mekhoa ea ho eketsa ka ho toba hangata e sebelisoa. Tse latelang ke mehato le mekhoa e khethehileng ea tšebeliso:
() 1. Keletso ea ho qhaqha HEC
HEC ke phofo eo ho leng thata ho e qhaqha ka ho toba le ho etsa li-clumps habonolo ka metsing. Ka hona, pele o eketsa HEC, ho kgothaletswa ho e hasanya pele. Mehato e tloaelehileng ke e latelang:
Hlohlelletsa 'me u qhalakane: Butle-butle eketsa HEC metsing tlas'a ho sisinyeha ka lebelo le tlaase ho qoba ho thehoa ha li-clumps. Palo ea HEC e ekelitsoeng e lokela ho fetoloa ho ea ka litlhoko tsa viscosity ea ho roala, ka kakaretso e ikarabellang bakeng sa 0.3% -1% ea foromo eohle.
Thibela li-caking: Ha u eketsa HEC, palo e nyenyane ea li-anti-caking agents, tse kang ethanol, propylene glycol, joalo-joalo, e ka kenngoa metsing ho etsa hore phofo ea HEC e qhalane ka mokhoa o ts'oanang le ho fokotsa monyetla oa ho baka.
(2). Mokhoa oa ho hasanya le oa ho qhala
Mokhoa oa ho qhala le oa ho qhibiliha ke ho qhaqha HEC ka thōko ho mokelikeli oa viscous nakong ea ho lokisa pente, ebe o e kenya penteng. Mehato e khethehileng ke e latelang:
Ts'ebetso ea ho qhibiliha: HEC e thata ho qhibiliha ka mocheso o tloaelehileng kapa o tlaase, kahoo metsi a ka futhumatsoa ka mokhoa o loketseng ho fihlela mocheso oa 30-40 ° C ho potlakisa ho qhibiliha ha HEC.
Nako e susumetsang: HEC e qhibiliha butle-butle 'me hangata e hloka ho sisinyeha bakeng sa lihora tse 0.5-2 ho fihlela e qhibiliha ka ho feletseng ho ba mokelikeli oa viscous o bonaletsang kapa o translucent.
Fetola boleng ba pH: Ka mor'a hore HEC e qhibilihe, boleng ba pH ba tharollo bo ka fetoloa ho ea ka litlhoko, hangata pakeng tsa 7-9, ho ntlafatsa botsitso ba ho roala.
(3). Mokhoa oa ho eketsa ka kotloloho
Mokhoa o tobileng oa ho eketsa ke ho eketsa HEC ka ho toba tsamaisong ea ho roala nakong ea tlhahiso ea ho roala, e loketseng ho roala ka litlhoko tse khethehileng tsa ts'ebetso. Ka kopo ela hloko lintlha tse latelang ha u sebetsa:
Omisa pele ebe o koloba: EketsaHECho karolo e omileng ea pente e entsoeng ka metsi pele, e kopanya ka mokhoa o ts'oanang le li-powders tse ling, ebe u eketsa metsi le lisebelisoa tsa metsi ho qoba ho kopana.
Taolo ea shear: Ha u eketsa HEC ho roala, ho hlokahala hore u sebelise lisebelisoa tsa ho kopanya li-shear tse phahameng, tse kang sephahla se phahameng sa lebelo, e le hore HEC e ka qhalakanngoa ka nako e khutšoanyane 'me e fihle ho viscosity e hlokahalang.
3. Taolo ea tekanyo ea HEC
Ka liaparo tse nang le metsi, palo ea HEC e lokela ho laoloa ho ea ka litlhoko tsa sebele tsa ho roala. HEC e ngata haholo e tla etsa hore viscosity ea ho roala e be e phahameng haholo 'me e ame ho sebetsa; HEC e nyane haholo e kanna ea se fihlelle phello e lebelletsoeng ea botenya. Tlas'a maemo a tloaelehileng, tekanyo ea HEC e laoloa ho 0.3% -1% ea foromo eohle, 'me karolo e itseng e ka fetoloa ka liteko.
4. Litlhokomelo bakeng sa HEC ka liaparo tse thehiloeng metsing
Qoba agglomeration: HEC e atisa ho bokellana ka metsing, kahoo ha u e eketsa, e kenye butle-butle ka hohle kamoo ho ka khonehang, e hasane ka ho lekana, 'me u qobe ho tsoaka ha moea ka hohle kamoo ho ka khonehang.
Mocheso oa ho qhibiliha: HEC e qhibiliha ka potlako ho mocheso o phahameng, empa mocheso ha oa lokela ho feta 50 ° C, ho seng joalo viscosity ea eona e ka ameha.
Maemo a susumetsang: Ho tsosoa ho tsoelang pele hoa hlokahala nakong ea ts'ebetso ea ho qhibiliha ea HEC, 'me lijana tse nang le likhurumetso li lokela ho sebelisoa ka hohle kamoo ho ka khonehang ho thibela tšilafalo ho tsoa litšila tse ka ntle le mouoane oa metsi.
Phetoho ea boleng ba pH: The viscosity ea HEC e tla eketseha tlas'a maemo a alkaline, kahoo pH ea bohlokoa ea tharollo e hloka ho lokisoa ka mokhoa o utloahalang ho thibela ts'ebetso ea ho roala ho theoha ka lebaka la pH e feteletseng.
Teko ea ho lumellana: Ha ho etsoa liforomo tse ncha, tšebeliso ea HEC e lokela ho lekoa bakeng sa ho lumellana le li-thickeners tse ling, li-emulsifiers, joalo-joalo ho netefatsa hore ha ho na liphello tse mpe tse tla etsahala.
5. Mehlala ea ts'ebeliso ea HEC ka liphahlo tse entsoeng ka metsi
HEC e ka sebelisoa e le motenya ka har'a marako a ka hare a metsi a thehiloeng metsing le marako a ka ntle a metsi. Ka mohlala:
Pente ea lebota e thehiloeng metsing: HEC e sebelisetsoa ho ntlafatsa thepa ea pente, ho etsa hore kopo e be bonolo le ho feta, le ho fokotsa matšoao a borashe.
Lerako le ka ntle le thehiloeng metsing: HEC e ka ntlafatsa ho hanyetsa ha sag le ho hanyetsa boemo ba leholimo ba ho roala le ho qoba tšenyo ea filimi ea ho roala e bakoang ke khoholeho ea pula.
Tšebeliso ea HEC ka liaparo tse nang le metsi e ke ke ea ntlafatsa feela ts'ebetso ea kaho ea ho roala, empa hape e ntlafatsa boleng bo bonahalang le ho tšoarella ha filimi ea ho roala. Litšebelisong tse sebetsang, ho ea ka litlhoko tse khethehileng tsa ho roala, mokhoa oa ho qhibiliha le palo ea ho eketsoa ha HEC e khethoa ka mokhoa o utloahalang, 'me o kopantsoe le ho lokisetsa lisebelisoa tse ling tse tala, liphello tsa boleng bo phahameng ba ho roala li ka finyelloa.
Nako ea poso: Nov-10-2024