HydroxyPropyyl MethylcelluloseYog ib txwm tshwm sim cellulose cellulose ether, uas tsis muaj kev phom sij rau tib neeg lub cev. Txawm li cas los xij, cov ntaub ntawv raw ntawm paj rwb ligers thiab hpmc siv nyob rau hauv lub Hoobkas yog txhua tus ntsej muag, thiab lwm tus yuav tsis muaj kev phom sij.
HydroxyPropyyl methylcellulose yog tsis muaj tshuaj lom. Cellulose yog tsim nyog tsim nyog thiab yog txheej txheem los ntawm kev siv ib txwm muaj tshwm sim los ntawm alkali fusion, ntxuav, sib tsoo, sib tsoo thiab lwm yam txheej txheem. Yuav tsis raug txim rau cov neeg noj qab haus huv.
HydroxyPropy cellulose, kuj paub tias hypromellose thiab cellulose hydroxypropyl metylropyr etherication tshwj xeeb ethermication nyob rau hauv alkaline tej yam kev mob.
Cov synthesis ntawm hydroxypropylulcellulose: lub chaw ua si cellulose yog kho nrog lye ntawm 35-40 ℃ ua kom tau cov tau alkali fiber ntau polymerized. Nyob rau hauv ntau yam uas yuav tsum tau. Tso cov alkali mus rau hauv lub hwj txwv ethermicification, ntxiv rau cov kab mob antylene oxide thiab methyl ntawm 50-80 ℃ rau 5h, thiab lub siab sab sauv yog li 1.8mpa. Tom qab ntawd ntxiv qhov tsim nyog ntawm hydrochloric acid thiab oxalic acid los ntxuav cov ntaub ntawv hauv dej kub ntawm 90 ° C kom nce qhov loj thiab ntim. Dehydrate los ntawm centrifugation. Maj mam nrawm nroo. Thaum cov ntsiab lus dej hauv cov khoom siv tsawg dua 60%, qhuav nws nrog kwj cua ntawm cov huab cua kub ntawm 130 ° C rau cov ntsiab lus tsawg dua 5%.
HPMC tau tsim los ntawm cov txheej txheem hnyav siv tau toluene thiab isopropanol yog cov kuab tshuaj. Yog tias nws tau ntxuav heev heev, nws yuav muaj qhov tsw me me. Qhov no yog teeb meem ntawm cov txheej txheem ntxuav, uas tsis cuam tshuam rau kev siv lossis ib qho teeb meem.
Hypromellose yog lub paj rwb recined uas tsis tshua muaj impregnated nrog kua kom muaj alkaline cellulose, thiab tom qab ntawd, tau muab yaug, qhuav, thiab tsoo kom tau cov khoom tiav. Phem heev thiab tsw tsw qab, yog li cov neeg siv tuaj yeem siv nws hauv lub sijhawm ruaj khov.
HydroxyPropyyl methylulose yuav tsum them sai sai rau cov khoom hauv qab no hauv daim ntawv thov:
Nyob rau hauv cov nyhuv ntawm cov av hmoov, hydroxypropylulose tsuas yog ua si ib qho kev txhawb nqa, thiab tsis koom nrog cov tshuaj tiv thaiv tshuaj. Cov av nkos tau ntxiv nrog dej thiab muab tso rau ntawm phab ntsa, uas yog cov tshuaj lom neeg. Vim tias kev tsim cov khoom tshiab, cov av nkos ntawm phab ntsa raug tshem tawm ntawm phab ntsa thiab hauv av mus rau cov hmoov tshiab. HydroxyPropyyl methylcelulose tsuas khaws cov dej qab zib thiab pab kom cov calcium kom muaj lus teb zoo dua, tab sis nws tsis koom nrog hauv ib qho lus teb.
HydroxyPropyl cellulose HPMC tsis koom nrog kev tshuaj tiv thaiv kev tshuaj, tab sis tsuas yog pab. Ntxiv dej rau cov av nkos thiab muab tso rau ntawm phab ntsa, nws yog tshuaj lom neeg. Vim tias kev tsim cov khoom tshiab, cov av nkos ntawm phab ntsa yog muab tshem tawm los ntawm phab ntsa thiab hauv av ua tau, vim tias yam tshiab tau tsim NS. Lub ntsiab Cheebtsam ntawm cov hmoov av grey calcium yog: Ca (Oh) 2, kev sib xyaw ntawm Cao thiab ib qho me me ntawm CaCo3, Cao
H2O = CA (OH) 2-CA (OH) 2 CO2 = CACO3 ↓ H2O
Calcium grey ua lwm yam nyob rau hauv cov nyhuv ntawm dej thiab CO2 hauv huab cua, thaum HPMC tsuas yog khaws cov dej thiab pab kom muaj lus teb zoo dua. Nws tsis koom nrog hauv ib qho lus teb.
HydroxyPropyyl methyl cellulose muaj ntau ntawm kev siv. Hauv lub neej txhua hnub, muaj ntau yam khoom muaj kev sib luag ntawm kev tsim khoom. Tom qab ntawd, hauv kev lag luam sib txawv, dab tsi yog qhov cuam tshuam ntawm hydroxypropylulose, Kuv yuav piav rau koj, kom koj tuaj yeem tiv thaiv kev siv nws thaum tau txais kev paub.
Ua ntej tshaj plaws, hauv kev tsim kho kev tsim kho, nws tuaj yeem suav tau raws li tus neeg sawv cev thiab dej-tswjfwm. Lub cug tshuaj cug yog nqus tau, yog li tag nrho cov cug qhuav peb siv nws muaj nws kev koom tes. Ib qho ntxiv, hauv cov cuab yeej tsim kho xws li cov nqaij nyoos gypsum, plaster, thiab tsis tsuas yog ncua sij hawm rau kev ua haujlwm, tab sis kuj ua rau cov xim ntau smearable. Hauv marble, adhesive ceramic vuas, molecular compound yas decorations, nws tuaj yeem siv ua adhesion txhim kho, thiab lwm yam.
Nyob rau hauv lwm cov kev lag luam, xws li plooj (venterain Hauv kev lag luam lacquer thiab number case luam ntawv, nws tuaj yeem siv los ua cov hmoov xoob, thiab txawm tias nws tuaj yeem siv ua cov xim sib xyaw ua ke, thiab muaj peev xwm ua ke ua ke zoo nkauj, thiab txawm tias nws tuaj yeem siv ua cov xim sib xyaw ua ke , nrog rau cov muag muag, pwm tso cov neeg sawv cev, thiab lwm yam; Hauv kev tsim cov polyvinyl chloride, nws yog suav tias yog cov hmoov xoob.
Cov khoom ua los ntawm hydroxypropyl methylcelulose tau siv dav hauv cov txiv freshness thiab zaub, nqaij tawv, cov khoom lag luam textile thiab textile. Nws muaj kev nyab xeeb thiab tsis muaj tshuaj lom, tsis muaj kev txob siab heev rau tib neeg lub cev nqaij daim tawv thiab tawv, thiab muaj peev xwm txawm tias muaj zaub mov ntxiv. Txawm li cas los xij, hauv qhov xwm txheej tiag tiag ntawm qhov teeb meem, nws cov hmoov av yuav ua rau muaj kuab paug, thiab nws tsis muaj txiaj ntsig rau kev saib xyuas ntawm daim tawv nqaij kom tsis txhob tawg.
Dej ceev
Tshwj xeeb hydroxypropyyl methylcellulose rau kev siv ntau dhau ntawm cov dej, thiab cov dej yuav tsum khaws cia rau hauv cov plaster kom ntau li ntau tau nyob rau lub sijhawm thaum lub gypsum yog txheej kiag li. Cov cuab yeej tshwj xeeb no tau hu ua dej cia thiab yog ncaj qha rau lub viscrot ntawm hydroxyprropylulose tov siv rau cov plaster. Lub siab dua txoj kev daws viscosity, ntau dua cov dej ua kom tiav.
Los tiv thaiv
Cug tshuaj nrog cov khoom tshwj xeeb ntawm cov khoom lag luam tshwj xeeb uas muaj peev xwm siv tau nrog lub capting nws tus kheej tsis hloov nws tus tub los ntxhais, txwv tsis pub nws yuav xaub thaum pib.
Txo viscosity thiab pab txhawb kev tsim kho
Tom qab ntxiv ntau yam kev tsim kho hydroxypropyl cov khoom, ntsuab gypsum plaster nrog tus cwj pwm viscous me me tuaj yeem tsim. Thaum nws tau hais tias tsim nyog thiab qib qis-viscosity ntawm kev tsim kho hydroxypropen methylropen tau siv, cov degree ntawm viscosity thiab kev tsim kho yooj yim dua. Txawm li cas los xij, cov dej khaws cia ntawm hydroxypropyf methylcellose kev tsim kho tsis muaj zog yog tsis muaj zog, thiab nws yog ib qho tsim nyog los nce tus nqi ntxiv.
Yas compatibilization tus nqi
Rau ib qho kev sib khib qhuav, nws yog kev lag luam ntau dua los tsim cov tshuaj cug ntub loj loj, uas tuaj yeem ua tiav los ntawm kev ntxiv me ntsis dej thiab npuas. Txawm li cas los xij, yog tias cov dej thiab npuas ntev dhau lawm, lub zog yog qhov tsis txaus ntseeg.
Lub sijhawm Post: Plaub-26-2024