Kev ua haujlwm thiab kev siv ntawm hydroxyethyl cellulose

Cov khoom ntawm Hydroxyethyl Cellulose

Cov khoom tseem ceeb ntawm hydroxyethyl cellulose yog tias nws yog soluble hauv dej txias thiab dej kub, thiab tsis muaj cov khoom siv gel. Nws muaj ntau yam kev hloov pauv, solubility thiab viscosity, zoo thermal stability (qis dua 140 ° C), thiab tsis tsim gelatin nyob rau hauv acidic tej yam kev mob. nag lossis daus. Hydroxyethyl cellulose kua tuaj yeem tsim cov yeeb yaj kiab pob tshab, thiab muaj cov yam ntxwv ntawm hom tsis-ionic uas tsis cuam tshuam nrog ions thiab muaj kev sib raug zoo.

① Kub thiab dej solubility: Piv nrog methyl cellulose (MC) uas tsuas yog soluble nyob rau hauv dej txias, hydroxyethyl cellulose yuav yaj nyob rau hauv dej kub los yog dej txias, thiab tsis precipitate ntawm kub los yog boiling, ua rau nws muaj ntau yam ntawm Solubility thiab viscosity yam ntxwv, thiab tsis-thermogelling zog.

②Salt kam rau ua: Vim nws tsis yog-ionic, nws tuaj yeem ua ke nrog ntau yam ntawm lwm cov dej-soluble polymers, surfactants, thiab ntsev. Yog li, piv nrog ionic carboxymethyl cellulose (CMC), hydroxyethyl cellulose muaj ntsev zoo dua.

③ Kev tuav dej, theem, thiab cov yeeb yaj kiab tsim cov khoom: nws lub peev xwm khaws dej yog ob zaug siab dua li ntawm methyl cellulose, thiab nws muaj kev tswj xyuas zoo heev, zoo heev zaj duab xis-tsim cov khoom, kev tswj tsis tau dej, miscibility, thiab tiv thaiv kev sib deev colloid.

Kev siv cov hydroxyethyl cellulose

Hydroxyethyl cellulose yog cov khoom uas tsis yog-ionic dej-soluble cellulose ether, uas yog dav siv nyob rau hauv architectural txheej, roj av, polymerization, tshuaj, siv txhua hnub, ntawv thiab number case, ntaub, ceramics, kev tsim kho, kev ua liaj ua teb thiab lwm yam lag luam. Nws muaj lub luag haujlwm ntawm thickening, bonding, emulsifying, dispersing thiab stabilizing, thiab muaj peev xwm tswj tau dej, tsim ib zaj duab xis thiab muab ib tug tiv thaiv colloid nyhuv. Nws yog yooj yim soluble nyob rau hauv dej txias thiab dej kub, thiab muaj peev xwm muab ib tug tov nrog ntau yam viscosity. Nws yog kev txhim kho nyob rau xyoo tas los no. Ib qho ntawm cov cellulose ethers sai.

1. Latex xim

Hydroxyethyl cellulose yog feem ntau siv thickener hauv cov xim latex. Ntxiv nrog rau cov xim latex thickening, nws tuaj yeem emulsify, disperse, stabilize thiab khaws dej. Nws yog tus cwj pwm los ntawm cov nyhuv thickening zoo kawg li, kev tsim xim zoo, kev tsim cov yeeb yaj kiab thiab kev ruaj ntseg cia. Hydroxyethyl cellulose yog ib qho uas tsis yog-ionic cellulose derivative uas yuav siv tau nyob rau hauv ntau yam pH. Nws muaj kev sib raug zoo nrog lwm cov ntaub ntawv hauv cov khoom (xws li pigments, additives, fillers thiab ntsev). Cov coatings thickened nrog hydroxyethyl cellulose muaj rheology zoo ntawm ntau tus nqi shear thiab yog pseudoplastic. Kev tsim kho xws li txhuam txheej, cov menyuam txheej thiab cov tshuaj tsuag txheej tuaj yeem siv tau. Kev tsim kho zoo, tsis yooj yim rau drip, sag thiab txaws, thiab cov cuab yeej zoo leveling.

2. Polymerization

Hydroxyethyl cellulose muaj cov dej num ntawm dispersing, emulsifying, suspending thiab stabilizing nyob rau hauv lub polymerization los yog copolymerization Cheebtsam ntawm hluavtaws resins, thiab yuav siv tau raws li ib tug tiv thaiv colloid. Nws yog tus cwj pwm los ntawm muaj zog dispersing muaj peev xwm, nyias particle "zaj duab xis", zoo particle loj, uniform particle zoo, xoob hom, zoo fluidity, siab khoom transparency thiab yooj yim ua. Vim tias hydroxyethyl cellulose tuaj yeem yaj hauv dej txias thiab dej kub, thiab tsis muaj qhov kub thiab txias, nws yog qhov tsim nyog rau ntau yam kev cuam tshuam polymerization.

Cov khoom tseem ceeb los tshawb xyuas qhov zoo ntawm dispersant yog qhov chaw (lossis interfacial lub zog, muaj zog intrefacial thiab gelation kub ntawm nws cov aqueous daws. Cov khoom ntawm hydroxyethyl cellulose yog tsim rau cov polymerization los yog copolymerization ntawm hluavtaws resins. Hydroxyethyl cellulose muaj kev sib raug zoo nrog lwm cov dej-soluble cellulose ethers thiab PVA. Cov txheej txheem sib xyaw ua ke yog li tsim tuaj yeem tau txais txiaj ntsig ntawm kev kawm ntawm ib leeg. Cov khoom siv cob ua tom qab kev sib xyaw tsis tsuas yog muaj cov khoom zoo, tab sis kuj txo cov khoom poob.

3. Roj drilling

Hauv cov roj drilling thiab ntau lawm, high-viscosity hydroxyethyl cellulose feem ntau yog siv los ua cov thickener rau cov kua tiav thiab cov kua dej tiav. Tsawg viscosity hydroxyethyl cellulose yog siv los ua kua dej txo qis. Nyob rau hauv ntau yam av nkos xav tau rau drilling, ua kom tiav, zoo cementing thiab fracturing ua hauj lwm, hydroxyethyl cellulose yog siv los ua ib tug thickener kom tau zoo fluidity thiab stability ntawm av nkos. Thaum lub sij hawm drilling, nws tuaj yeem txhim kho cov xuab zeb nqa peev xwm ntawm cov av nkos thiab ua kom lub neej ua haujlwm ntev ntawm lub laum me ntsis. Nyob rau hauv cov khoom ua tiav theem qis thiab cov kua cementing, cov dej zoo heev txo qis kev ua haujlwm ntawm hydroxyethyl cellulose tuaj yeem tiv thaiv cov dej ntau los ntawm kev nkag mus rau cov roj txheej los ntawm cov av nkos, thiab tuaj yeem txhim kho lub peev xwm ntawm cov roj txheej.

4. Cov tshuaj txhua hnub

Hydroxyethyl cellulose yog ib tug zoo zaj duab xis-tsim tus neeg sawv cev, binder, thickener, stabilizer thiab dispersant nyob rau hauv cov tshuaj zawv plaub hau, tshuaj tsuag plaub hau, neutralizers, plaub hau conditioners thiab tshuaj pleev ib ce; nyob rau hauv ntxuav hmoov Nws yog ib tug av redeposition agent. Hydroxyethyl cellulose yaj sai sai ntawm qhov kub thiab txias, uas tuaj yeem ua kom cov txheej txheem ntau lawm thiab txhim kho kev tsim khoom. Qhov pom tseeb ntawm cov tshuaj ntxuav tes uas muaj hydroxyethyl cellulose yog tias nws tuaj yeem txhim kho smoothness thiab silkiness ntawm cov ntaub.

5. Kev tsim kho

Hydroxyethyl cellulose tuaj yeem siv rau hauv cov khoom siv xws li cov pob zeb sib xyaw, cov tshuaj khib nyiab tshiab, gypsum plaster lossis lwm yam cements, thiab lwm yam, kom khaws cov dej thaum lub sij hawm tsim kho ua ntej lawv teem thiab tawv. Ntxiv nrog rau kev txhim kho cov dej tuav ntawm lub tsev cov khoom, hydroxyethyl cellulose kuj prolongs kev kho thiab qhib lub sij hawm ntawm plaster los yog mastic. Nws tuaj yeem txo qhov tawv nqaij, plam thiab sagging. Yog li, kev tsim kho kev ua tau zoo tuaj yeem txhim kho, kev ua haujlwm tau zoo tuaj yeem nce ntxiv, thiab sijhawm txuag tau. Nyob rau tib lub sijhawm, lub peev xwm nthuav dav ntawm cov stucco tuaj yeem txhim kho, yog li txuag cov ntaub ntawv raw.

6. Kev ua liaj ua teb

Hydroxyethyl cellulose yog siv rau hauv kev tsim cov tshuaj tua kab emulsions thiab ncua kev kawm ntawv, raws li ib tug thickener rau tshuaj tsuag emulsions los yog suspensions. Nws tuaj yeem txo qis cov tshuaj lom neeg thiab ua rau nws ruaj khov rau cov nplooj ntawm cov nroj tsuag, yog li ua rau cov nyhuv ntawm foliar txau. Hydroxyethyl cellulose kuj tseem siv tau los ua ib zaj duab xis-tsim tus neeg sawv cev hauv cov noob txheej; raws li ib tug binder thiab film-forming tus neeg sawv cev nyob rau hauv lub recycling ntawm luam yeeb nplooj.

7. Ntawv ua thiab luam ntawv number case

Hydroxyethyl cellulose tuaj yeem siv los ua tus neeg sawv cev sizing rau daim ntawv thiab lub rooj tsavxwm thiab ua cov thickening thiab suspending tus neeg saib xyuas rau cov dej hauv cov inks. Hauv cov txheej txheem papermaking, cov khoom zoo tshaj ntawm hydroxyethyl cellulose suav nrog kev sib raug zoo nrog feem ntau cov pos hniav, resins thiab inorganic ntsev, tsis tshua muaj npuas, tsis tshua muaj oxygen noj thiab muaj peev xwm los tsim ib tug du nto zaj duab xis. Cov yeeb yaj kiab muaj qhov tsis tshua muaj permeability thiab siab gloss, uas tuaj yeem txo cov nqi. Daim ntawv loj nrog hydroxyethyl cellulose, uas tuaj yeem siv rau kev luam tawm cov duab zoo. Hauv kev tsim cov dej-raws li tus number case, cov dej-raws li tus number case thickened nrog hydroxyethyl cellulose dries sai sai, muaj xim zoo diffusion, thiab tsis ua rau sticking.

8. Npuag

Nws tuaj yeem siv los ua tus neeg sawv cev thiab cov neeg sawv cev hauv cov ntaub ntawv luam tawm thiab dyeing pastes thiab latex xim; raws li ib tug thickener rau sizing cov ntaub ntawv nyob rau tom qab ntawm cov ntaub pua plag. Hauv cov iav fiber ntau, nws yog siv los ua tus neeg sawv cev thiab khi; nyob rau hauv tawv muab tshuaj txhuam, nws yuav siv tau raws li ib tug modifier thiab binder. Muab ntau yam viscosity ntau rau cov txheej txheej lossis cov nplaum, ua rau cov txheej txheem ntau dua thiab nrawm, thiab txhim kho qhov pom tseeb ntawm kev luam ntawv thiab dyeing.

9. Ceramics

Nws tuaj yeem siv los tsim cov binders muaj zog rau ceramics.

10. Tshuaj txhuam hniav

Nws tuaj yeem siv los ua cov thickener hauv kev tsim cov tshuaj txhuam hniav.