Daim Ntawv Thov Kev Taw Qhia ntawm Hydroxyethyl Cellulose

Hydroxyethyl Cellulose Lub Cev thiab Tshuaj Lom Zem
Cov yam ntxwv ntawm cov khoom no yog dawb mus rau daj daj fibrous lossis hmoov khoom, tsis muaj tshuaj lom thiab tsis muaj saj.
Melting point 288-290 °C (dec.)
Qhov Ceev 0.75 g/mL ntawm 25 °C (lit.)
Kev Yaj Tau yaj hauv dej. Tsis yaj hauv cov kuab tshuaj organic. Nws yaj tau hauv dej txias thiab dej kub, thiab feem ntau tsis yaj hauv feem ntau cov kuab tshuaj organic. Qhov viscosity hloov me ntsis hauv qhov ntau ntawm PH tus nqi 2-12, tab sis qhov viscosity txo qis dhau qhov ntau no. Nws muaj cov haujlwm ntawm kev ua kom tuab, ncua, khi, emulsifying, dispersing, thiab tswj cov dej noo. Cov tshuaj hauv ntau qhov viscosity tuaj yeem npaj tau. Muaj kev yaj ntsev zoo heev rau electrolytes.

Ua ib qho surfactant uas tsis yog ionic, hydroxyethyl cellulose muaj cov khoom hauv qab no ntxiv rau qhov ua kom tuab, ncua, khi, ntab, ua zaj duab xis, tawg, khaws dej thiab muab cov colloids tiv thaiv:
1. HEC yaj tau hauv dej kub lossis dej txias, kub siab lossis npau tsis muaj nag lossis daus, yog li nws muaj ntau yam solubility thiab viscosity yam ntxwv, thiab tsis yog thermal gelation;
2. Nws yog non-ionic thiab tuaj yeem nyob ua ke nrog ntau yam polymers, surfactants, thiab ntsev uas yaj hauv dej. Nws yog ib qho khoom siv colloidal thickener zoo heev rau cov kua electrolyte uas muaj concentration siab;
3. Lub peev xwm khaws dej tau ob npaug ntawm methyl cellulose, thiab nws muaj kev tswj hwm dej zoo dua.
4. Piv nrog rau cov methyl cellulose thiab hydroxypropyl methyl cellulose uas tau lees paub, lub peev xwm ntawm HEC yog qhov phem tshaj plaws, tab sis lub peev xwm tiv thaiv colloid yog qhov muaj zog tshaj plaws.

Cov kev cai thiab cov qauv zoo rau hydroxyethyl cellulose
Cov Khoom: Index molar substitution (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 kua 5-60000 lead (%) ≤0.001

Kev siv cov hydroxyethyl cellulose
【Siv 1】Siv ua surfactant, latex thickener, colloidal protective agent, oil exploration fracturing fluid, polystyrene thiab polyvinyl chloride dispersant, thiab lwm yam.
[Siv 2] Siv ua cov khoom ua kom tuab thiab txo cov kua dej poob rau cov kua dej drilling thiab cov kua dej tiav, thiab muaj cov nyhuv ua kom tuab hauv cov kua dej brine drilling. Nws kuj tseem siv tau ua cov khoom ua kom cov kua dej poob rau cov cement roj qhov dej. Nws tuaj yeem sib txuas nrog cov hlau polyvalent ions los ua ib qho gel.
[Siv 3] Cov khoom no yog siv ua cov tshuaj polymeric dispersant rau cov kua dej gel fracturing, polystyrene thiab polyvinyl chloride hauv kev khawb av fracturing. Nws kuj tseem siv tau ua cov khoom siv emulsion thickener hauv kev lag luam xim, hygrostat hauv kev lag luam hluav taws xob, cov cement anticoagulant thiab cov neeg sawv cev khaws cov dej noo hauv kev lag luam kev tsim kho. Kev lag luam ceramic glazing thiab cov tshuaj txhuam hniav binder. Nws kuj tseem siv dav hauv kev luam ntawv thiab dyeing, textiles, papermaking, tshuaj, kev tu cev, khoom noj, luam yeeb, tshuaj tua kab thiab cov neeg sawv cev tua hluav taws.
[Siv 4] Siv ua surfactant, colloidal tiv thaiv tus neeg sawv cev, emulsification stabilizer rau vinyl chloride, vinyl acetate thiab lwm yam emulsions, nrog rau viscosifier, dispersant, thiab dispersion stabilizer rau latex. Siv dav hauv coatings, fibers, dyeing, papermaking, cosmetics, tshuaj, tshuaj tua kab, thiab lwm yam. Nws kuj muaj ntau yam siv hauv kev tshawb nrhiav roj thiab kev lag luam tshuab.
【Siv 5】Hydroxyethyl cellulose muaj cov haujlwm ntawm kev ua haujlwm ntawm qhov chaw, ua kom tuab, ncua, khi, emulsifying, tsim zaj duab xis, tawg, khaws dej thiab muab kev tiv thaiv hauv kev npaj khoom khov thiab kua tshuaj.

Cov ntawv thov ntawm hydroxyethyl cellulose
Siv rau hauv cov txheej txheem architectural, tshuaj pleev ib ce, tshuaj txhuam hniav, surfactants, latex thickeners, colloidal tiv thaiv cov neeg sawv cev, roj fracturing kua, polystyrene thiab polyvinyl chloride dispersants, thiab lwm yam.

Cov Ntaub Ntawv Kev Nyab Xeeb ntawm Hydroxyethyl Cellulose (MSDS)
1. Cov khoom no muaj kev pheej hmoo ntawm kev tawg ntawm cov hmoov av. Thaum tuav ntau ntau lossis ntau, ceev faj kom tsis txhob muaj hmoov av thiab cov khoom nyob hauv huab cua, thiab khaws cia kom deb ntawm cua sov, hluav taws xob, nplaim taws thiab hluav taws xob static. 2. Tsis txhob kom hmoov methylcellulose nkag mus rau hauv thiab kov qhov muag, thiab hnav lub ntsej muag lim dej thiab cov tsom iav kev nyab xeeb thaum lub sijhawm ua haujlwm. 3. Cov khoom nplua heev thaum ntub dej, thiab cov hmoov methylcellulose uas nchuav yuav tsum tau ntxuav raws sijhawm thiab yuav tsum tau ua kom tsis txhob plam.

Cov yam ntxwv ntawm kev khaws cia thiab kev thauj mus los ntawm hydroxyethyl cellulose
Ntim: ob txheej hnab, sab nraud composite hnab, sab hauv polyethylene zaj duab xis hnab, qhov hnyav tag nrho 20kg lossis 25kg ib lub hnab.
Kev Khaws Cia thiab Kev Thauj Mus Los: Khaws cia rau hauv qhov chaw uas muaj cua nkag thiab qhuav hauv tsev, thiab xyuam xim rau cov dej noo. Tiv thaiv nag thiab hnub thaum thauj mus los.

Txoj kev npaj ntawm hydroxyethyl cellulose
Txoj Kev 1: Muab cov paj rwb nyoos los yog cov pulp refined tso rau hauv 30% lye, coj tawm tom qab ib nrab teev, thiab nias. Nias kom txog thaum qhov sib piv ntawm alkali-dej ncav cuag 1: 2.8, thiab txav mus rau lub cuab yeej crushing rau crushing. Muab cov alkali fiber crushed rau hauv lub lauj kaub tshuaj tiv thaiv. Kaw thiab tshem tawm, puv nrog nitrogen. Tom qab hloov huab cua hauv lub lauj kaub nrog nitrogen, nias rau hauv cov kua ethylene oxide precooled. React hauv qab txias ntawm 25 ° C rau 2 teev kom tau txais hydroxyethyl cellulose nyoos. 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 laus, ntxuav sai sai nrog dej, thiab thaum kawg centrifuge, qhuav, thiab zom kom tau txais hydroxyethyl cellulose tsawg-ntsev.
Txoj Kev 2: Alkali cellulose yog ib qho polymer ntuj, txhua lub nplhaib fiber muaj peb pawg hydroxyl, pawg hydroxyl nquag tshaj plaws ua rau hydroxyethyl cellulose. Muab cov paj rwb nyoos lossis cov pulp refined ntub rau hauv 30% kua caustic soda, coj nws tawm thiab nias tom qab ib nrab teev. Nias kom txog thaum qhov sib piv ntawm cov dej alkaline ncav cuag 1: 2.8, tom qab ntawd tsoo. Muab cov alkali cellulose pulverized rau hauv lub lauj kaub tshuaj tiv thaiv, kaw nws, nqus tsev, sau nws nrog nitrogen, thiab rov ua qhov nqus tsev thiab nitrogen filling kom hloov pauv huab cua hauv lub lauj kaub tag nrho. Nias rau hauv cov kua ethylene oxide uas tau txias ua ntej, muab dej txias rau hauv lub tsho ntawm lub lauj kaub tshuaj tiv thaiv, thiab tswj cov tshuaj tiv thaiv ntawm kwv yees li 25 ° C rau 2 teev kom tau txais hydroxyethyl cellulose nyoos. Cov khoom nyoos raug 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 raug ntxuav nrog dej, qhuav los ntawm centrifugation, ziab thiab pulverized kom tau txais hydroxyethyl cellulose. Cov khoom siv raw siv (kg/t) paj rwb linters lossis cov pulp tsawg 730-780 kua caustic soda (30%) 2400 ethylene oxide 900 cawv (95%) 4500 acetic acid 240 glyoxal (40%) 100-300
Hydroxyethyl cellulose yog ib qho hmoov dawb los yog daj uas tsis muaj ntxhiab, tsis muaj saj thiab yooj yim ntws, yaj tau hauv dej txias thiab dej kub, feem ntau tsis yaj hauv feem ntau cov kuab tshuaj organic.
Hydroxyethyl cellulose (HEC) yog ib qho dawb los yog daj daj, tsis muaj ntxhiab, tsis muaj tshuaj lom fibrous lossis powdery khoom, uas yog npaj los ntawm etherification reaction ntawm alkaline cellulose thiab ethylene oxide (lossis chlorohydrin). Nonionic soluble cellulose ethers. Vim tias HEC muaj cov khoom zoo ntawm thickening, suspending, dispersing, emulsifying, bonding, zaj duab xis-tsim, tiv thaiv noo noo thiab muab kev tiv thaiv colloid, nws tau siv dav hauv kev tshawb nrhiav roj, coatings, 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 tseeb ceev: 0.35-0.61 g / ml; decomposition kub: 205-210 ° C; qeeb hlawv ceev; equilibrium kub: 23 ° C; 50% 6% ntawm rh, 29% ntawm 84% rh.

Yuav siv hydroxyethyl cellulose li cas
ntxiv ncaj qha thaum lub sijhawm tsim khoom
1. Ntxiv dej huv rau hauv lub thoob loj uas muaj lub tshuab sib tov ua haujlwm siab.
Hydroxyethyl cellulose
2. Pib do tas li ntawm qhov ceev qis thiab maj mam lim cov hydroxyethyl cellulose rau hauv cov tshuaj kom sib npaug.
3. Txuas ntxiv do kom txog thaum tag nrho cov khoom me me ntub tag.
4. Tom qab ntawd ntxiv cov tshuaj tiv thaiv xob laim, cov khoom siv yooj yim xws li cov xim, cov khoom pab kom tawg, thiab dej ammonia.
5. Do kom txog thaum tag nrho cov hydroxyethyl cellulose yaj tag (qhov viscosity ntawm cov tshuaj nce ntxiv ntau heev) ua ntej ntxiv lwm yam khoom rau hauv cov mis, thiab zom kom txog thaum cov khoom tiav.
Nruab nrog niam dej cawv
Txoj kev no yog npaj cov dej cawv niam nrog cov concentration siab dua ua ntej, thiab tom qab ntawd ntxiv rau hauv cov xim latex. Qhov zoo ntawm txoj kev no yog tias nws muaj kev ywj pheej ntau dua thiab tuaj yeem ntxiv ncaj qha rau cov xim tiav, tab sis nws yuav tsum tau khaws cia kom zoo. Cov kauj ruam zoo ib yam li Cov Kauj Ruam 1-4 hauv Txoj Kev 1, qhov sib txawv yog tias tsis tas yuav do kom txog thaum nws yaj tag rau hauv cov kua nplaum.
Porridge rau phenology
Vim tias cov kuab tshuaj organic tsis zoo rau hydroxyethyl cellulose, cov kuab tshuaj organic no siv tau los npaj cov porridge. Cov kuab tshuaj organic feem ntau siv yog cov kua organic xws li ethylene glycol, propylene glycol thiab cov zaj duab xis formers (xws li ethylene glycol lossis diethylene glycol butyl acetate) hauv cov xim pleev xim. Dej khov kuj yog cov kuab tshuaj tsis zoo, yog li dej khov feem ntau siv ua ke nrog cov kua organic los npaj porridge. Hydroxyethyl cellulose ntawm porridge tuaj yeem ntxiv ncaj qha rau hauv cov xim pleev xim, thiab hydroxyethyl cellulose tau faib thiab o hauv porridge. Thaum ntxiv rau cov xim pleev xim, nws yaj tam sim ntawd thiab ua haujlwm ua cov khoom tuab. Tom qab ntxiv, txuas ntxiv do kom txog thaum hydroxyethyl cellulose yaj tag thiab sib xws. Feem ntau, porridge yog ua los ntawm kev sib tov rau 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. Thaum lub caij ntuj sov, qhov kub ntawm dej feem ntau siab dhau, yog li nws tsis haum rau siv porridge.

Cov kev ceev faj rau hydroxyethyl cellulose
Vim tias cov hydroxyethyl cellulose uas tau kho saum npoo yog hmoov lossis cellulose khov, nws yooj yim rau kev tuav thiab yaj nws hauv dej tsuav yog cov khoom hauv qab no tau them sai sai rau.
1. Ua ntej thiab tom qab ntxiv hydroxyethyl cellulose, nws yuav tsum tau do tas li kom txog thaum cov tshuaj no pob tshab thiab meej.
2. Yuav tsum maj mam lim rau hauv lub tank sib tov, tsis txhob ntxiv ntau hydroxyethyl cellulose lossis hydroxyethyl cellulose uas tau tsim cov pob thiab pob rau hauv lub tank sib tov. 3. Qhov kub ntawm dej thiab PH tus nqi hauv dej muaj kev sib raug zoo rau kev yaj ntawm hydroxyethyl cellulose, yog li yuav tsum tau ua tib zoo saib xyuas.
4. Tsis txhob ntxiv qee yam alkaline rau hauv qhov sib tov ua ntej cov hmoov hydroxyethyl cellulose raug sov los ntawm dej. Kev tsa tus nqi pH tom qab sov yuav pab yaj. lub
5. Li sai tau, ntxiv cov tshuaj tua kab mob fungal sai li sai tau.
6. Thaum siv cov hydroxyethyl cellulose uas muaj viscosity siab, qhov concentration ntawm cov kua txiv hmab txiv ntoo yuav tsum tsis txhob siab tshaj 2.5-3%, txwv tsis pub cov kua txiv hmab txiv ntoo yuav nyuaj rau kev tuav. Cov hydroxyethyl cellulose tom qab kho feem ntau tsis yooj yim los ua cov pob lossis cov pob kheej kheej, thiab nws yuav tsis tsim cov colloids uas tsis yaj tom qab ntxiv dej.
Feem ntau nws yog siv los ua cov khoom ua kom tuab, tus neeg sawv cev tiv thaiv, cov nplaum, cov khoom ruaj khov thiab cov khoom ntxiv rau kev npaj cov emulsion, jelly, tshuaj pleev, tshuaj pleev, tshuaj ntxuav qhov muag, suppository thiab ntsiav tshuaj, thiab kuj siv los ua hydrophilic gel thiab cov khoom siv pob txha 1. Kev npaj cov pob txha-hom kev tso tawm ruaj khov. Nws kuj tseem siv tau ua cov khoom ruaj khov hauv zaub mov.