1. Cov yam ntxwv sib txawv
Hydroxypropyl methylcellulose: dawb los yog dawb dawb fibrous los yog granular hmoov, teej tug mus rau ntau yam uas tsis yog-ionic cellulose tov ethers. Nws yog semi-synthetic, tsis muaj zog, viscoelastic polymer.
Hydroxyethyl cellulose: (HEC) yog xim dawb los yog lub teeb daj, tsis muaj ntxhiab, tsis muaj tshuaj lom fiber ntau lossis hmoov hmoov, npaj los ntawm etherification ntawm alkaline cellulose thiab ethylene oxide (los yog chloroethanol). Nws belongs rau non-ionic soluble cellulose ethers.
2. Kev siv sib txawv
Hydroxypropyl methylcellulose: Siv los ua cov thickener, dispersant thiab stabilizer hauv kev lag luam txheej, thiab muaj kev sib raug zoo hauv dej lossis cov kuab tshuaj organic. Raws li cov xim tshem tawm; raws li ib tug dispersant nyob rau hauv zus tau tej cov polyvinyl chloride, nws yog lub ntsiab pab neeg sawv cev rau kev npaj ntawm PVC los ntawm ncua kev kawm ntawv polymerization; nws kuj yog siv dav hauv cov tawv, cov khoom siv, cov txiv hmab txiv ntoo thiab zaub khaws cia thiab textile industries.
Hydroxyethyl cellulose: siv los ua ib qho nplaum, surfactant, colloidal tiv thaiv tus neeg sawv cev, dispersant, emulsifier thiab dispersion stabilizer, thiab lwm yam. Nws muaj ntau yam kev siv hauv txheej, inks, fibers, dyeing, papermaking, tshuaj pleev ib ce, tshuaj tua kab, ntxhia ua, roj extraction. thiab tshuaj.
3. Sib txawv solubility
Hydroxypropyl methylcellulose: Nws yuav luag insoluble hauv ethanol, ether, thiab acetone; nws swells mus rau hauv ib tug ntshiab los yog me ntsis turbid colloidal tov nyob rau hauv dej txias.
Hydroxyethyl cellulose: muaj cov khoom ntawm thickening, suspending, bonding, emulsifying, dispersing, thiab khaws cia noo noo. Cov kev daws teeb meem nrog cov viscosity sib txawv tuaj yeem npaj tau. Nws muaj qhov tshwj xeeb zoo ntsev solubility rau electrolytes.
Hydroxypropyl methylcellulose (HPMC) Lub cev thiab tshuaj muaj zog:
1. Cov tsos mob: MC yog dawb los yog yuav luag dawb fibrous lossis granular hmoov, tsis muaj ntxhiab tsw.
2. Khoom: MC yuav luag insoluble hauv ethanol, ether thiab acetone. Nws disperses thiab swells sai sai hauv dej kub ntawm 80 ~ 90 ℃, thiab yaj sai sai tom qab txias. Cov tshuaj aqueous yog qhov ruaj khov ntawm chav tsev kub thiab tuaj yeem gel ntawm qhov kub thiab txias, thiab cov gel tuaj yeem hloov nrog cov tshuaj nrog qhov kub thiab txias. Nws muaj zoo wettability, dispersibility, adhesion, thickening, emulsification, dej tuav thiab film-forming zog, nrog rau impermeability rau roj. Cov zaj duab xis tsim muaj zoo heev toughness, yooj thiab transparency. Vim tias nws tsis yog-ionic, nws tuaj yeem sib haum nrog lwm cov emulsifiers, tab sis nws yooj yim kom ntsev tawm thiab cov tshuaj yog ruaj khov nyob rau hauv qhov ntau ntawm PH2-12.
3. Pom pom qhov ntom ntom: 0.30-0.70g / cm3, qhov ceev yog li 1.3g / cm3.
2. Txoj kev daws teeb meem:
Cov khoom MC yog ncaj qha ntxiv rau hauv dej, nws yuav agglomerate thiab tom qab ntawd yaj, tab sis qhov kev sib cais no qeeb heev thiab nyuaj.Cov lus qhia peb li nram qab no, thiab tus neeg siv tuaj yeem xaiv txoj kev yooj yim tshaj plaws raws li qhov kev siv:
1. Cov txheej txheem dej kub: Txij li MC tsis yaj hauv dej kub, MC tuaj yeem sib npaug sib npaug hauv cov dej kub thaum pib. Thaum nws yog tom qab txias, ob txoj kev raug piav raws li hauv qab no:
1). Muab cov dej kub uas xav tau rau hauv lub thawv thiab kub kom txog 70 ° C. Maj mam ntxiv MC nyob rau hauv qeeb agitation, pib ntab rau saum npoo dej, thiab mam li maj mam tsim ib slurry, thiab txias lub slurry nyob rau hauv agitation.
2). Ntxiv 1/3 los yog 2/3 ntawm cov dej xav tau rau hauv lub thawv thiab kub rau 70 ℃. Ua raws li txoj kev 1) kom tawg MC los npaj cov dej kub slurry; tom qab ntawd ntxiv cov dej txias los yog dej khov rau hauv cov dej kub slurry, txias qhov sib tov tom qab nplawm.
2. Powder mixing method: Sib tov MC hmoov cov khoom nrog qhov sib npaug lossis ntau dua ntawm lwm cov khoom xyaw hmoov kom tawg tag nrho los ntawm kev sib xyaw qhuav, thiab tom qab ntawd ntxiv dej kom yaj, ces MC tuaj yeem yaj yam tsis muaj agglomerating.
3. Organic solvent wetting method: pre-disperse los yog moisten MC nrog cov organic hnyav, xws li ethanol, ethylene glycol lossis roj, thiab tom qab ntawd ntxiv dej kom yaj, ces MC kuj tuaj yeem yaj tau zoo nyob rau lub sijhawm no.
3. Lub hom phiaj:
Cov khoom no yog siv dav hauv kev tsim vaj tsev, cov ntaub ntawv hauv tsev, cov txheej txheem dispersive, wallpaper pastes, polymerization additives, xim removers, tawv, number case, ntawv, thiab lwm yam. Piv txwv li, nws yog siv raws li ib tug binder, thickener thiab dej-retaining tus neeg saib xyuas nyob rau hauv lub tsev cov ntaub ntawv, raws li ib tug zaj duab xis-tsim tus neeg saib xyuas thiab thickener nyob rau hauv lub txheej kev lag luam, thiab nws kuj yog dav siv nyob rau hauv teb xws li roj av drilling thiab niaj hnub tshuaj lom neeg kev lag luam. .
Lub cev thiab tshuaj lom neeg ntawm methyl cellulose (MC):
3. Cov tsos: MC yog dawb los yog yuav luag dawb fibrous los yog granular hmoov, tsw tsw.
Khoom: MC yuav luag insoluble hauv ethanol, ether thiab acetone. Nws disperses thiab swells sai sai hauv dej kub ntawm 80 ~ 90> ℃, thiab yaj sai sai tom qab txias. Cov tshuaj aqueous yog qhov ruaj khov heev ntawm qhov kub thiab txias thiab tuaj yeem gel ntawm qhov kub thiab txias, thiab cov gel tuaj yeem hloov nrog cov tshuaj nrog qhov kub thiab txias. Nws muaj zoo wettability, dispersibility, adhesion, thickening, emulsification, dej tuav thiab film-forming zog, nrog rau impermeability rau roj. Cov zaj duab xis tsim muaj zoo heev toughness, yooj thiab transparency. Vim tias nws tsis yog-ionic, nws tuaj yeem sib haum nrog lwm cov emulsifiers, tab sis nws yooj yim kom ntsev tawm thiab cov tshuaj yog ruaj khov nyob rau hauv qhov ntau ntawm PH2-12.
1.Kev ceev ceev: 0.30-0.70g / cm3, ntom yog li 1.3g / cm3.
Forth. Txoj kev Dissolution:
MC> Cov khoom yog ncaj qha ntxiv rau dej, nws yuav agglomerate thiab tom qab ntawd yaj, tab sis qhov kev sib cais no qeeb heev thiab nyuaj. Peb txoj kev daws teeb meem hauv qab no tau qhia, thiab cov neeg siv tuaj yeem xaiv txoj kev yooj yim tshaj plaws raws li kev siv cov xwm txheej:
1. Cov txheej txheem dej kub: Txij li MC tsis yaj hauv dej kub, MC tuaj yeem sib npaug sib npaug hauv cov dej kub thaum pib. Thaum nws yog tom qab txias, ob txoj kev raug piav raws li hauv qab no:
1). Muab cov dej kub uas xav tau rau hauv lub thawv thiab kub kom txog 70 ° C. Maj mam ntxiv MC nyob rau hauv qeeb agitation, pib ntab rau saum npoo dej, thiab mam li maj mam tsim ib slurry, thiab txias lub slurry nyob rau hauv agitation.
2). Ntxiv 1/3 los yog 2/3 ntawm cov dej xav tau rau hauv lub thawv thiab kub rau 70 ° C. Ua raws li txoj hauv kev 1) kom tawg MC los npaj cov dej kub slurry; tom qab ntawd ntxiv cov dej txias los yog dej khov rau hauv cov dej kub slurry, txias qhov sib tov tom qab nplawm.
Txoj kev sib xyaw hmoov: qhuav sib xyaw MC hmoov nrog sib npaug lossis ntau dua ntawm lwm cov hmoov sib xyaw kom tawg tag nrho, thiab tom qab ntawd ntxiv dej kom yaj lawv, ces MC tuaj yeem yaj yam tsis muaj agglomeration.
3. Organic solvent wetting method: disperse los yog moisten MC nrog cov organic hnyav, xws li ethanol, ethylene glycol lossis roj, thiab tom qab ntawd ntxiv dej kom yaj. Tom qab ntawd MC kuj tuaj yeem yaj tau zoo.
Tsib. Lub hom phiaj:
Cov khoom no yog siv dav hauv kev tsim vaj tsev, cov ntaub ntawv hauv tsev, cov txheej txheem dispersive, wallpaper pastes, polymerization additives, xim removers, tawv, number case, ntawv, thiab lwm yam. Piv txwv li, nws yog siv raws li ib tug binder, thickener thiab dej-retaining tus neeg saib xyuas nyob rau hauv lub tsev cov ntaub ntawv, raws li ib tug zaj duab xis-tsim tus neeg saib xyuas thiab thickener nyob rau hauv lub txheej kev lag luam, thiab nws kuj yog dav siv nyob rau hauv teb xws li roj av drilling thiab niaj hnub tshuaj lom neeg kev lag luam. .
1. Kev tsim kho kev lag luam: Raws li tus neeg saib xyuas dej-retaining thiab retarder ntawm cement mortar, nws ua rau cov mortar pumpable. Siv los ua cov ntawv khi rau hauv plaster, plaster, putty hmoov lossis lwm yam khoom siv hauv tsev los txhim kho kev sib kis thiab ua haujlwm ntev. Nws tuaj yeem siv los muab cov vuas luaj ceramic, marble, kho kom zoo nkauj yas, muab tshuaj txhuam kom zoo, thiab tuaj yeem txo cov cement ntau. Cov dej tuav cov khoom ntawm HPMC tiv thaiv cov slurry los ntawm kev tawg vim ziab sai heev tom qab daim ntawv thov, thiab txhim khu lub zog tom qab hardening.
2. Ceramic manufacturing kev lag luam: dav siv los ua ib tug binder hauv kev tsim cov khoom ceramic.
3. Kev lag luam xim: Raws li cov thickener, dispersant thiab stabilizer hauv kev lag luam xim, nws muaj kev sib raug zoo hauv dej lossis cov kuab tshuaj organic. Raws li cov xim tshem tawm.
4. Ink printing: Raws li ib tug thickener, dispersant thiab stabilizer nyob rau hauv lub lag luam number case, nws muaj zoo compatibility nyob rau hauv dej los yog organic solvents.
5. Plastics: siv los ua pwm tso cov neeg ua haujlwm, softeners, lubricants, thiab lwm yam.
6. Polyvinyl chloride: Nws yog siv los ua ib qho dispersant hauv kev tsim cov polyvinyl chloride thiab yog tus neeg sawv cev tseem ceeb rau kev npaj ntawm PVC los ntawm kev ncua polymerization.
7. Lwm tus: Cov khoom no kuj tau siv dav hauv cov tawv nqaij, cov khoom siv ntawv, cov txiv hmab txiv ntoo thiab zaub khaws cia thiab kev lag luam textile.
8. Pharmaceutical kev lag luam: cov ntaub ntawv txheej; cov ntaub ntawv ua yeeb yaj kiab; tus nqi tswj cov ntaub ntawv polymer rau kev npaj qeeb-tso; stabilizers; tshem tawm cov neeg sawv cev; ntsiav tshuaj binders; thickeners. Kev phom sij rau kev noj qab haus huv: cov khoom no muaj kev nyab xeeb thiab tsis muaj tshuaj lom, thiab tuaj yeem siv los ua cov khoom noj khoom haus ntxiv, Tsis muaj cua sov, tsis muaj khaus rau ntawm daim tawv nqaij thiab mucous daim nyias nyias. Feem ntau suav tias muaj kev nyab xeeb (FDA1985), qhov tso cai noj txhua hnub yog 25mg / kg (FAO / WHO 1985), thiab cov cuab yeej tiv thaiv yuav tsum hnav thaum ua haujlwm.
Kev cuam tshuam ib puag ncig: Tsis txhob muab pov tseg kom ua rau huab cua muaj kuab paug los ntawm ya cov plua plav.
Kev phom sij rau lub cev thiab tshuaj lom neeg: Tsis txhob sib cuag nrog cov khoom siv hluav taws xob, thiab zam kev tsim cov hmoov av ntau hauv qhov chaw kaw kom tsis txhob muaj kev phom sij tawg.
Qhov no tsuas yog siv los ua cov thickener, uas tsis zoo rau daim tawv nqaij.
Post lub sij hawm: Nov-24-2021