Hydroxyethyl Cellulose Physical thiab Chemical Properties
Cov tsos mob Cov khoom no yog dawb mus rau lub teeb daj daj fibrous los yog powdery khoom, non-toxic thiab tasteless
Melting point 288-290 ° C (Lub Kaum Ob Hlis)
Qhov ceev 0.75 g / mL ntawm 25 ° C (lit.)
Solubility Soluble nyob rau hauv dej. Insoluble nyob rau hauv cov organic solvents. Nws yog soluble hauv dej txias thiab dej kub, thiab feem ntau insoluble nyob rau hauv feem ntau cov organic solvents. Lub viscosity hloov me ntsis hauv thaj tsam ntawm PH tus nqi 2-12, tab sis lub viscosity txo qis tshaj qhov ntau. Nws muaj cov haujlwm ntawm thickening, suspending, khi, emulsifying, dispersing, thiab tswj cov dej noo. Kev daws teeb meem hauv qhov sib txawv viscosity tuaj yeem npaj tau. Nws muaj qhov tshwj xeeb zoo ntsev solubility rau electrolytes.
Raws li cov tsis-ionic surfactant, hydroxyethyl cellulose muaj cov khoom nram qab no ntxiv rau cov thickening, suspending, binding, floating, film-forming, dispersing, water-retaining thiab muab kev tiv thaiv colloids:
1. HEC yog soluble nyob rau hauv dej kub los yog dej txias, kub kub los yog boiling tsis muaj nag lossis daus, yog li ntawd nws muaj ib tug ntau yam ntawm solubility thiab viscosity yam ntxwv, thiab non-thermal gelation;
2. Nws yog non-ionic thiab tuaj yeem ua ke nrog ntau yam ntawm lwm cov dej-soluble polymers, surfactants, thiab ntsev. Nws yog ib qho zoo heev colloidal thickener rau high-concentration electrolyte daws;
3. Lub peev xwm tuav dej yog ob zaug siab dua li ntawm methyl cellulose, thiab nws muaj kev tswj xyuas zoo dua.
4. Piv nrog rau kev lees paub methyl cellulose thiab hydroxypropyl methyl cellulose, lub peev xwm dispersing ntawm HEC yog qhov phem tshaj, tab sis lub peev xwm tiv thaiv colloid yog qhov muaj zog tshaj.
Cov kev cai thiab cov qauv zoo rau hydroxyethyl cellulose
Cov khoom: Index molar hloov (MS) 2.0-2.5 Moisture (%) ≤5 Dej insoluble (%) ≤0.5 PH nqi 6.0-8.5 Hnyav hlau (ug/g) ≤20 Tshauv (%) ≤5 Viscosity (mpa.s) 2% 20 ℃ aqueous tov 5-60000 lead (%) ≤0.001
Kev siv cov hydroxyethyl cellulose
【Siv 1】 Siv los ua surfactant, latex thickener, colloidal tiv thaiv tus neeg saib xyuas, kev tshawb nrhiav roj fracturing kua, polystyrene thiab polyvinyl chloride dispersant, thiab lwm yam.
[Siv 2] Siv los ua cov thickener thiab cov kua dej poob reducer rau cov dej-raws li drilling kua thiab ua tiav cov kua dej, thiab muaj qhov pom tseeb thickening nyhuv hauv brine drilling kua. Nws kuj tseem siv tau los ua cov kua dej poob qis rau cov roj zoo cement. Nws tuaj yeem txuas nrog polyvalent hlau ions los ua ib lub gel.
[Siv 3] Cov khoom no yog siv los ua polymeric dispersant rau cov dej-raws li gel fracturing kua, polystyrene thiab polyvinyl chloride hauv fracturing mining. Nws kuj tseem tuaj yeem siv los ua emulsion thickener hauv kev lag luam xim, hygrostat hauv kev lag luam hluav taws xob, cov cement anticoagulant thiab cov neeg saib xyuas cov dej noo hauv kev tsim kho. Ceramic kev lag luam glazing thiab tshuaj txhuam hniav binder. Nws kuj yog siv dav hauv kev luam ntawv thiab dyeing, textiles, papermaking, tshuaj, tu cev, zaub mov, luam yeeb, tshuaj tua kab thiab tua hluav taws.
[Siv 4] Siv ua surfactant, colloidal tiv thaiv tus neeg sawv cev, emulsification stabilizer rau yas chloride, yas acetate thiab lwm yam emulsions, nrog rau viscosifier, dispersant, thiab dispersion stabilizer rau latex. Siv dav hauv cov txheej txheem, fiber ntau, dyeing, papermaking, tshuaj pleev ib ce, tshuaj, tshuaj tua kab, thiab lwm yam. Nws kuj muaj ntau yam siv hauv kev tshawb nrhiav roj thiab tshuab kev lag luam.
【Siv 5】 Hydroxyethyl cellulose muaj lub luag haujlwm ntawm kev ua haujlwm ntawm qhov chaw, thickening, suspending, binding, emulsifying, film forming, dispersing, water retention and provide protection in pharmaceutical solid and liquid preparations.
Kev siv ntawm hydroxyethyl cellulose
Siv nyob rau hauv architectural coatings, tshuaj pleev ib ce, tshuaj txhuam hniav, surfactants, latex thickeners, colloidal tiv thaiv kab mob, roj fracturing kua, polystyrene thiab polyvinyl chloride dispersants, thiab lwm yam.
Hydroxyethyl Cellulose Cov Ntaub Ntawv Kev Nyab Xeeb Cov Ntaub Ntawv (MSDS)
1. Cov khoom muaj kev pheej hmoo ntawm plua plav tawg. Thaum tuav cov khoom loj lossis ntau ntau, ceev faj kom tsis txhob muaj plua plav tawm thiab tshem tawm hauv huab cua, thiab kom deb ntawm tshav kub, sparks, nplaim taws thiab hluav taws xob zoo li qub. 2. Tsis txhob methylcellulose hmoov los ntawm kev nkag mus thiab tiv thaiv qhov muag, thiab hnav lub qhov ncauj qhov ntswg thiab tsom iav kev nyab xeeb thaum ua haujlwm. 3. Cov khoom yog nplua heev thaum ntub dej, thiab cov hmoov methylcellulose spilled yuav tsum tau muab ntxuav kom huv si raws sij hawm thiab kev kho los tiv thaiv yuav tsum tau ua.
Cia thiab thauj cov yam ntxwv ntawm hydroxyethyl cellulose
Packing: ob-txheej hnab, cov hnab ntawv sab nrauv, hnab polyethylene zaj duab xis, net hnyav 20kg lossis 25kg ib lub hnab.
Kev khaws cia thiab kev thauj mus los: Khaws rau hauv qhov chaw muaj cua thiab qhuav hauv tsev, thiab xyuam xim rau cov dej noo. Los nag thiab hnub tiv thaiv thaum caij tsheb thauj mus los.
Txoj kev npaj ntawm hydroxyethyl cellulose
Txoj Kev 1: Soak raw cov paj rwb linters lossis refined pulp hauv 30% lye, tshem tawm tom qab ib nrab teev, thiab nias. Nias kom txog thaum qhov sib piv ntawm alkali-dej cov ntsiab lus nce mus txog 1: 2.8, thiab txav mus rau lub tshuab crushing rau crushing. Muab cov crushed alkali fiber rau hauv cov tshuaj tiv thaiv kettle. Kaw thiab khiav tawm, ntim nrog nitrogen. Tom qab hloov cov huab cua nyob rau hauv lub kettle nrog nitrogen, nias rau hauv precooled ethylene oxide kua. React nyob rau hauv txias ntawm 25 ° C rau 2 h kom tau crude hydroxyethyl cellulose. Ntxuav cov khoom nyoos nrog cawv thiab kho tus nqi pH rau 4-6 los ntawm kev ntxiv acetic acid. Ntxiv glyoxal rau kev sib txuas thiab kev laus, sai sai ntxuav nrog dej, thiab thaum kawg centrifuge, qhuav, thiab zom kom tau cov ntsev tsawg hydroxyethyl cellulose.
Txoj Kev 2: Alkali cellulose yog lub ntuj tsim polymer, txhua lub nplhaib fiber ntau muaj peb pawg hydroxyl, pawg hydroxyl nquag nquag ua haujlwm los tsim hydroxyethyl cellulose. Soak raw cov paj rwb linters los yog refined pulp nyob rau hauv 30% kua caustic soda, coj nws tawm thiab nias tom qab ib nrab ib teev. Nyem kom txog thaum qhov sib piv ntawm cov dej alkaline nce mus txog 1: 2.8, ces crush. Muab cov pulverized alkali cellulose rau hauv cov tshuaj tiv thaiv kettle, kaw nws, nqus nws, sau nws nrog nitrogen, thiab rov ua dua lub tshuab nqus tsev thiab nitrogen filling kom tag nrho cov huab cua hauv lub lauj kaub. Nias rau hauv cov kua ua ntej txias ethylene oxide, muab cov dej txias tso rau hauv lub tsho ntawm cov tshuaj tiv thaiv kettle, thiab tswj cov tshuaj tiv thaiv ntawm li 25 ° C rau 2 teev kom tau txais cov tshuaj hydroxyethyl cellulose crude. Cov khoom nyoos yog ntxuav nrog cawv, neutralized rau pH 4-6 los ntawm kev ntxiv acetic acid, thiab cross-linked nrog glyoxal rau kev laus. Tom qab ntawd nws yog ntxuav nrog dej, lub cev qhuav dej los ntawm centrifugation, qhuav thiab pulverized kom tau hydroxyethyl cellulose. Cov khoom siv raw (kg / t) paj rwb linters lossis qis pulp 730-780 kua caustic soda (30%) 2400 ethylene oxide 900 cawv (95%) 4500 acetic acid 240 glyoxal (40%) 100-300
Hydroxyethyl cellulose yog cov hmoov dawb los yog daj daj, saj tsis qab thiab yooj yim ntws hmoov, soluble hauv dej txias thiab dej kub, feem ntau insoluble nyob rau hauv feem ntau cov organic solvents.
Hydroxyethyl cellulose (HEC) yog xim dawb los yog lub teeb daj, tsis muaj ntxhiab, tsis muaj tshuaj lom fibrous lossis hmoov hmoov, uas yog npaj los ntawm etherification cov tshuaj tiv thaiv ntawm alkaline cellulose thiab ethylene oxide (los yog chlorohydrin). Nonionic soluble cellulose ethers. Vim HEC muaj cov khoom zoo ntawm thickening, suspending, dispersing, emulsifying, bonding, film-forming, tiv thaiv ya raws thiab muab kev tiv thaiv colloid, nws tau siv dav hauv kev tshawb nrhiav roj, txheej txheej, kev tsim kho, tshuaj, khoom noj, textile, ntawv thiab polymer polymerization. thiab lwm yam teb. 40 mesh sieving tus nqi ≥ 99%; softening kub: 135-140 ° C; pom meej ceev: 0.35-0.61g / ml; decomposition kub: 205-210 ° C; qeeb kub ceev; Qhov kub thiab txias: 23 ° C; 50% 6% ntawm rh, 29% ntawm 84% rh.
Yuav siv hydroxyethyl cellulose li cas
ntxiv ncaj qha rau lub sijhawm tsim khoom
1. Ntxiv dej huv rau lub thoob loj uas nruab nrog lub tshuab shear siab. tus
Hydroxyethyl cellulose
2. Pib do tsis tu ncua ntawm qhov ceev thiab maj mam sieve cov hydroxyethyl cellulose rau hauv cov tshuaj sib npaug. tus
3. Txuas ntxiv mus kom txog thaum tag nrho cov khoom yog tsau. tus
4. Tom qab ntawd ntxiv tus neeg saib xyuas kev tiv thaiv xob laim, cov khoom siv yooj yim xws li pigments, dispersion aids, dej ammonia. tus
5. Sib tov kom txog thaum tag nrho cov hydroxyethyl cellulose yog yaj tag (lub viscosity ntawm cov tshuaj nce ntau heev) ua ntej ntxiv lwm yam nyob rau hauv cov mis, thiab grind kom txog thaum cov khoom tiav.
Nruab nrog niam cawv
Txoj kev no yog npaj cov cawv niam nrog ntau dua concentration ua ntej, thiab tom qab ntawd ntxiv rau cov xim latex. Qhov kom zoo dua ntawm txoj kev no yog tias nws muaj qhov yooj yim dua thiab tuaj yeem ncaj qha ntxiv rau cov xim tiav, tab sis nws yuav tsum khaws cia kom zoo. Cov kauj ruam zoo ib yam li Kauj Ruam 1-4 hauv Txoj Kev 1, qhov sib txawv yog tias tsis tas yuav tsum tau do kom txog thaum nws yaj tag rau hauv cov kua nplaum.
Porridge rau phenology
Txij li cov kuab tshuaj organic yog cov kuab tshuaj tsis zoo rau hydroxyethyl cellulose, cov kuab tshuaj organic no tuaj yeem siv los npaj cov porridge. Feem ntau siv cov kuab tshuaj organic yog cov kua organic xws li ethylene glycol, propylene glycol thiab zaj duab xis qub (xws li ethylene glycol los yog diethylene glycol butyl acetate) hauv cov xim pleev xim. Cov dej khov kuj yog cov kuab tshuaj tsis zoo, yog li dej khov feem ntau siv ua ke nrog cov kua dej organic los npaj porridge. Lub hydroxyethyl cellulose ntawm porridge tuaj yeem ncaj qha ntxiv rau cov xim, thiab hydroxyethyl cellulose tau muab faib thiab swelled hauv porridge. Thaum ntxiv rau cov xim, nws dissolves tam sim ntawd thiab ua raws li ib tug thickener. Tom qab ntxiv, stirring tas li kom txog thaum hydroxyethyl cellulose yog yaj tag thiab uniform. Feem ntau, porridge yog tsim los ntawm kev sib xyaw rau 6 feem ntawm cov kuab tshuaj organic lossis dej khov nrog ib feem ntawm hydroxyethyl cellulose. Tom qab li 6-30 feeb, hydroxyethyl cellulose yuav hydrolyzed thiab o pom tseeb. Nyob rau lub caij ntuj sov, dej kub feem ntau yog siab dhau, yog li nws tsis tsim nyog siv porridge.
Kev ceev faj rau hydroxyethyl cellulose
Txij li qhov chaw kho hydroxyethyl cellulose yog hmoov los yog cellulose khoom, nws yog ib qho yooj yim los lis thiab yaj nws nyob rau hauv dej tsuav yog cov khoom nram qab no tau them nyiaj mloog mus rau. tus
1. Ua ntej thiab tom qab ntxiv hydroxyethyl cellulose, nws yuav tsum tau nplawm tas li kom txog thaum cov tshuaj yog pob tshab thiab meej. tus
2. Nws yuav tsum tau maj mam sieved rau hauv lub tank tov, tsis txhob ncaj qha ntxiv ib tug loj npaum li cas ntawm hydroxyethyl cellulose los yog hydroxyethyl cellulose uas tau tsim lumps thiab pob rau hauv lub mixing tank. 3. Dej kub thiab PH tus nqi hauv dej muaj kev sib raug zoo rau kev sib cais ntawm hydroxyethyl cellulose, yog li yuav tsum tau them nyiaj tshwj xeeb. tus
4. Tsis txhob ntxiv qee cov tshuaj alkaline rau qhov sib tov ua ntej cov hmoov hydroxyethyl cellulose sov los ntawm dej. Nce tus nqi pH tom qab sov so yuav pab yaj. tus
5. Raws li qhov ua tau, ntxiv cov tshuaj tiv thaiv kab mob kom ntxov li sai tau. tus
6. Thaum siv high-viscosity hydroxyethyl cellulose, qhov concentration ntawm niam cawv yuav tsum tsis txhob siab tshaj 2.5-3%, txwv tsis pub niam cawv yuav nyuaj. Cov tshuaj tom qab kho hydroxyethyl cellulose feem ntau tsis yooj yim rau cov pob los yog spheres, thiab nws yuav tsis tsim cov khoom sib txuas tsis sib xws tom qab ntxiv dej.
Nws yog feem ntau yog siv los ua cov thickener, tiv thaiv tus neeg sawv cev, nplaum, stabilizer thiab additive rau kev npaj ntawm emulsion, jelly, tshuaj pleev, tshuaj pleev ib ce, qhov muag cleanser, suppository thiab ntsiav tshuaj, thiab kuj siv raws li hydrophilic gel thiab skeleton khoom 1. Kev npaj cov pob txha- hom sustained-tso npaj. Nws kuj tseem siv tau los ua tus stabilizer hauv cov khoom noj.
Post lub sij hawm: Feb-02-2023