Hydroxyethyl cellulose (HEC) ke ntho e tenyetsehang le e sebelisoang haholo ho etsa lipente le liphahlo. E fana ka mesebetsi e mengata, e ntlafatsa ts'ebetso, botsitso, le thepa ea ts'ebeliso ea lihlahisoa tsena. Ka tlase ke tataiso e felletseng ea mokhoa oa ho sebelisa hydroxyethyl cellulose ka lipente le liphahlo, e koahelang melemo ea eona, mekhoa ea ts'ebeliso, le lintlha tsa moralo.
Melemo ea Hydroxyethyl Cellulose ka Lipente le Liaparo
Phetoho ea Rheology: HEC e fana ka phallo e lakatsehang le litšoaneleho tsa maemo ho lipente le lirafshoa, ho li thusa ho ata ka ho lekana le ho fokotsa ho fokotseha.
Ntlafatso ea Botsitso: E tsitsisa emulsion mme e thibela karohano ea mekhahlelo, ho netefatsa hore ho ajoa ka mokhoa o ts'oanang oa li-pigment le li-fillers.
Lisebelisoa tse Ntlafetseng tsa Kopo: Ka ho lokisa viscosity, HEC e etsa hore pente e be bonolo ho e sebelisa, ebang ke ka borashe, roller, kapa spray.
Paballo ea Metsi: HEC e na le thepa e ntle ea ho boloka metsi, e bohlokoa bakeng sa ho boloka ts'ebetso ea lipente le liphahlo, haholo maemong a omileng.
Ho lumellana: HEC e lumellana le mefuta e mengata ea li-solvents, li-pigment, le li-additives tse ling, e leng se etsang hore e tšoanelehe bakeng sa mefuta e sa tšoaneng.
Mekhoa ea Kopo
1. Dry Blending
Mokhoa o mong o tloaelehileng oa ho kenyelletsa HEC mefuteng ea pente ke ka ho kopanya ho omileng:
Mohato oa 1: Lekanya palo e hlokahalang ea phofo ea HEC.
Mohato oa 2: Butle-butle eketsa phofo ea HEC ho likarolo tse ling tse omeletseng tsa sebopeho.
Mohato oa 3: Etsa bonnete ba ho kopanya hantle ho qoba ho kopana.
Mohato oa 4: Butle-butle eketsa metsi kapa solvent ha u ntse u kopanya ka ho tsoelang pele ho fihlela HEC e na le metsi ka ho feletseng 'me motsoako oa homogeneous o finyelloa.
Ho kopanya ho omileng ho loketse liforomo moo taolo e nepahetseng holim'a viscosity e hlokahalang ho tloha qalong.
2. Tokiso ea Tharollo
Ho lokisa tharollo ea stock ea HEC pele o e kenyelletsa mofuteng oa pente ke mokhoa o mong o sebetsang:
Mohato oa 1: Hlakola phofshoana ea HEC metsing kapa mokelikeli o lakatsehang, ho etsa bonnete ba ho ferekana ho sa khaotseng ho thibela ho thehoa ha leqhubu.
Mohato oa 2: Lumella nako e lekaneng ea hore HEC e noe metsi ka botlalo le ho qhibiliha, hangata lihora tse 'maloa kapa bosiu bo le bong.
Mohato oa 3: Eketsa tharollo ea setoko ho sebopeho sa pente ha u ntse u hlohlelletsa ho fihlela ho tsitsa ho lakatsehang le thepa e fumaneha.
Mokhoa ona o lumella ho sebetsana habonolo le ho kenngoa ha HEC, haholo-holo ka tlhahiso e kholo.
Mehopolo ea Tlhahiso
1. Ho tsepamisa mohopolo
Khatiso ea HEC e hlokahalang ha ho etsoa pente e fapana ho latela viscosity e lakatsehang le mokhoa oa kopo:
Lisebelisoa tsa Low-Shear: Bakeng sa kopo ea borashe kapa roller, khatello e tlase ea HEC (0.2-1.0% ka boima ba 'mele) e ka ba e lekaneng ho fihlela viscosity e hlokahalang.
Lisebelisoa tsa High-Shear: Bakeng sa lisebelisoa tsa spray, ho ka 'na ha hlokahala hore ho be le khatello e phahameng (1.0-2.0% ka boima ba 'mele) ho thibela ho fokotseha le ho netefatsa hore atomization e ntle.
2. Phetoho ea pH
PH ea sebopeho sa pente e ka ama ho solubility le ts'ebetso ea HEC:
Optimal pH Range: HEC e sebetsa ka ho fetisisa ho se nke lehlakore ho isa ho alkaline pH range (pH 7-9).
Tokiso: Haeba motsoako o le asiti haholo kapa o le alkaline haholo, fetola pH o sebelisa li-additives tse loketseng joalo ka ammonia kapa organic acid ho ntlafatsa tšebetso ea HEC.
3. Mocheso
Mocheso o bapala karolo ea bohlokoa ho hydration le ho qhibiliha ha HEC:
Cold Water Solluble: Limaraka tse ling tsa HEC li etselitsoe ho qhibiliha ka metsing a batang, e leng se ka nolofatsang mokhoa oa ho kopanya.
Ho Potlakisa Metsi a Mofuthu: Maemong a mang, ho sebelisa metsi a futhumetseng ho ka potlakisa ts'ebetso ea metsi, empa mocheso o ka holimo ho 60 ° C o lokela ho qojoa ho thibela ho senyeha ha polymer.
4. Ho lumellana le Lisebelisoa tse ling
HEC e hloka ho lumellana le lisebelisoa tse ling ha ho etsoa ho qoba litaba tse kang sebopeho sa li-gel kapa karohano ea mekhahlelo:
Li-solvents: HEC e lumellana le mekhoa e 'meli e thehiloeng metsing le e thehiloeng ho li-solvents, empa tlhokomelo e lokela ho nkoa ho netefatsa ho qhalana ka ho feletseng.
Li-pigments le Fillers: HEC e thusa ho tsitsisa li-pigments le li-fillers, ho netefatsa hore ho ajoa ka mokhoa o ts'oanang le ho thibela ho rarolla.
Li-additives tse ling: Ho ba teng ha li-surfactants, li-dispersants, le li-additives tse ling li ka ama viscosity le botsitso ba sebopeho sa HEC-thickened.
Malebela a Sebetsang a ho Sebelisa Hantle
Pre-Dissolution: Pre-dissolving HEC ka metsing pele o e kenya ho sebopeho sa pente ho ka thusa ho etsa bonnete ba hore ho ajoa ka mokhoa o ts'oanang le ho thibela ho bokellana.
Keketso e Nyenyane: Ha o eketsa HEC ho sebopeho, etsa joalo butle-butle le ka tsitsipano e sa khaotseng ho qoba likotola.
High-Shear Mixing: Sebelisa li-mixer tse phahameng tsa ho kuta ha ho khoneha, kaha li ka thusa ho finyella motsoako oa homogeneous le taolo e ntle ea viscosity.
Phetoho ea Keketseho: Fetola khatello ea HEC ka ho eketseha, ho lekola viscosity le thepa ea ts'ebeliso ka mor'a kenyelletso e 'ngoe le e' ngoe ho fihlela botsitso bo lakatsehang.
Mathata a Tloaelehileng le Tharollo ea Mathata
Lumping: Haeba HEC e eketsoa kapele haholo kapa ntle le ho tsoakoa ka mokhoa o lekaneng, e ka etsa likotola. Ho thibela sena, hasanya HEC metsing butle-butle ha u ntse u susumetsa ka matla.
Viscosity e sa tsitsang: Ho fapana ha mocheso, pH, le lebelo la ho kopanya ho ka lebisa ho viscosity e sa tsitsang. Kamehla hlokomela le ho lokisa liparamente tsena ho boloka ho tšoana.
Foaming: HEC e ka kenya moea ka har'a sebopeho, e lebisang ho phophomang. Sebelisa li-defoam kapa li-anti-foam ho fokotsa bothata bona.
Hydroxyethyl cellulose ke karolo ea bohlokoahali mekhoeng ea ho penta le ea ho roala ka lebaka la bokhoni ba eona ba ho ntlafatsa ponahalo, botsitso le lisebelisoa tsa ts'ebeliso. Ka ho utloisisa mekhoa e nepahetseng ea ho kenyelletsa HEC, ho lokisa litlhophiso tsa tlhahiso, le ho rarolla mathata a tloaelehileng, bahlahisi ba ka etsa lihlahisoa tsa pente tsa boleng bo phahameng, tse tsitsitseng le tse bonolo ho mosebedisi. Ebang ke ka ho kopanya ho omileng kapa ho lokisa tharollo, senotlolo se ka ho kopanya ka hloko, tokiso ea pH, le taolo ea mocheso ho sebelisa melemo ea HEC ka botlalo.
Nako ea poso: May-28-2024