Neeg muaj neeg ua haujlwm, ua ib qho tseem ceeb polymer, tau siv dav hauv ntau daim teb. Nrog kev txhim kho kev kawm txuas ntxiv ntawm kev tshawb fawb thiab thev naus laus zis, kev txhim kho thiab kev siv cov kev pab ntawm cellulose tau dhau los ua kev tshawb fawb kub. Cov cellulose hais tsis tsuas yog ua lub luag haujlwm tseem ceeb xws li kev tsim kho kom zoo xws li kev tiv thaiv zaub mov thiab kev tiv thaiv ib puag ncig.
1. Cov ntsiab lus yooj yim thiab cov yam ntxwv ntawm cellulose muaj cai
Cellulose muaj kev hais ua neeg raug tsim los ntawm cov ntaub ntawv ntawm ntuj. Los ntawm etherification cov tshuaj tiv thaiv, cov pab pawg hydroxyles tau hnov ib pawg neeg sawv cev los ua ib pawg ntawm cellulose thiab cov pawg ether (-o). Cov ntaub ntawv hauv xov tooj uas muaj kev pab muaj xws liMethyl Cellulose (MC), hydroxyethyl cellulose (HEC), HydroxyPropyl cellulose (HPC)thiabHydroxyPropyyl methylcellulose (HPMC)Cov. Lawv muaj cov dej solubility zoo, thickening, ruaj khov thiab biocompatibility, yog li lawv tau siv dav hauv ntau qhov kev lag luam.
2. Daim ntawv thov tseem ceeb ntawm Cellulose muaj cov neeg muaj cai
Kev Tsim Kho Kev Tsim Kho
Hauv kev tsim kho kev tsim kho, cov neeg muab kev pab cuam cellulose feem ntau yog siv ua cov dej num, dej ceev ceev rau cov neeg sawv cev thiab cov rheology cov neeg tswj hwm hauv cov cement, tshuaj khib thiab txheej. Nws tuaj yeem txhim kho lub zog ntawm xis ntshiab, txhim kho kev ua haujlwm zoo, ua kom muaj kev tsim kho, tiv thaiv kev tawg thiab txhim kho dej tsis kam. Yog li ntawd, cellulose muaj kev hais ua tau dav siv nyob rau hauv cov ntaub ntawv hauv tsev xws li phab ntsa, plag tsev thiab phab ntsa sab nrauv.
Kws Tshuaj Kho Mob
Daim ntawv thov cov neeg muaj kev pab cuam ntawm lub chaw muag tshuaj tau nthuav tawm cov ntaub ntawv tawm thiab cov tshuaj siv tshuaj thiab cov tuab tuab rau kev npaj tshuaj. Vim tias nws zoo biocompatibility thiab kho tau cov dej solubility, cov neeg muaj cov neeg hais txog cellulose feem ntau siv nyob rau hauv kev npaj cov ntsiav tshuaj, tsiav tshuaj thiab raug ncua. Tsis tas li ntawd, cov cellulose hais tau hais tau kuj tseem siv tau los ua cov tshuaj stabilizers rau cov tshuaj los txhim kho cov tshuaj solubility thiab tso cov tshuaj tawm.
Kev Lag Luam Txhua Hnub
Hauv cov kuab lom txhua hnub, cov cellulose muaj cov neeg nyob hauv cov thickeners thiab cov neeg sawv cev hauv zawv plaub hau, txias, tshuaj txhuam hniav, tshuaj txhuam hniav, tshuaj pleev ib ce thiab lwm yam khoom. Nws tuaj yeem txhim kho kev xav thiab kev ua tau zoo ntawm cov khoom lag luam, txhim kho kev sib xws, ruaj khov thiab cov nplaum ntawm cov khoom ntawm daim tawv nqaij. Nyob rau tib lub sijhawm, cellulose cellulose muaj cov neeg muaj kev pab zoo thiab cov tshuaj lom tsawg, uas ua tau raws li cov khoom lag luam ib puag ncig.
Kev Lag Luam Khoom Noj
Nyob rau hauv xyoo tsis ntev los no, daim ntawv thov ntawm Cellulose cov neeg ua kom muaj kev lag luam muaj kev nce khoom noj muaj kev vam meej, tshwj xeeb tshaj yog nyob hauv cov zaub mov ntxiv, tshwj xeeb hauv cov zaub mov ntxiv, cov tshuaj tiv thaiv zaub mov thiab cov tshuaj ntxiv. Cellulose ether tuaj yeem siv los ua cov tuab dua, emulsifier, stabilizer rau zaub mov, thiab siv hauv dej haus, mis nyuj khov, ncuav thiab lwm yam zaub mov noj. Tsis tas li ntawd, choululose ether kuj muaj qee cov haujlwm kev noj qab haus huv, raws li kev noj haus fiber ntau ntxiv, thiab txhawb txoj haujlwm ntawm txoj hnyuv.
Kev Tiv Thaiv Ib Puag Ncig Teb
Hauv kev tiv thaiv ib puag ncig, etherulose ether yog siv los ua dej khib nyiab dej, dej phwj tuaj thiab dej huv hauv cov roj av. Nws tuaj yeem pab decompose cov kev phom sij hauv dej los ntawm kev kho cov dej viscosity thiab cov dej khov tseem ceeb hauv kev tu thiab ua kom zoo dua qub. Cellulose ether kuj tseem siv nyob rau hauv ib puag ncig kev tiv thaiv txoj haujlwm xws li kev txhim kho av thiab kev kho av ntawm cov av qias neeg.
3. Kev tshawb fawb kev nce qib ntawm cellulose ether
Nrog kev nce qib txuas ntxiv hauv kev lag luam etitions cellulose ether, kev tshawb fawb thiab cov txheej txheem txawv teb chaws, hloov kho qauv thiab daim ntawv thov tshiab.
Txhim kho ntawm cov txheej txheem hluav taws xob
Muaj ntau txoj hauv kev rau synthesis ntawm synleteres etheres, thiab cov kev coj noj coj ua ib txwm muaj xws li txoj kev ua kom qhuav ntawm txoj kev ua kom qhuav ntawm txoj kev. Nyob rau hauv xyoo tsis ntev los no, nrog kev txhim kho ntawm kev tiv thaiv ib puag ncig, cov txheej txheem synthesis tau txais ntau yam. Cov tshuaj tshiab xws li supercritical kua etherification thiab microwave-pab cuam tshuam cov nqi ntau lawm, txhim kho kev ua kom muaj kuab huv.
Kev Hloov Kho
Kev ua yeeb yam hloov kho ntawm cellulose ether kuj tseem yog ib lub ntsiab lus kub hauv kev tshawb nrhiav tam sim no. Through modification, the thermal stability, solubility, acid and alkali resistance and other properties of cellulose ether can be improved to meet the needs of different fields. Piv txwv li, hauv kev tsim kho thiab cov dej khaws cia ntawm cellulose ether, cov neeg tshawb nrhiav paub cov pab pawg sib txawv los txhim kho cov pab pawg sib txawv los txhim kho nws cov kev ua tau zoo.
Tshiab Thov Kev Tshawb Fawb
Nrog kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis, siv cov khoom siv hluav taws xob, xws li cov khoom siv hluav taws xob, tau siv rau qee cov phiaj xwm kev tshawb fawb. Nyob rau yav tom ntej, nrog kev loj hlob sai ntawm cov ntaub ntawv ntse, cellulose ether yuav ua lub luag haujlwm tseem ceeb hauv cov teb no.
4. Yav Tom Ntej Kev Loj Hlob
Raws li ib puag ncig tus phooj ywg thiab txuas ntxiv dua cov khoom siv polymer, cellulose ether muaj kev cia siab thov kev cia siab. Raws li cov neeg xav tau rau kev tiv thaiv ib puag ncig thiab kev txhim kho kom ntev ntxiv ntxiv, kev tshawb fawb thiab kev thov ntawm cellulose muaj cov lus qhia:
Kev tiv thaiv ntsuab thiab ib puag ncig: Cov kws tshawb nrhiav yuav tshawb xyuas cov txheej txheem paj ntsuab thiab qis dua thiab cov khoom siv raw kom txo tau cov khoom huv ib puag ncig thaum lub sijhawm tsim khoom.
Kev ua tau zoo: los ntawm kev hloov kho ntxiv thiab kev thov kev ua haujlwm ntawm cov neeg muaj kev ua tau zoo, xws li kub thiab txias lossis muaj zog acid thiab alkali.
Multifunctional: txhim kho cellulose neeg muaj kev pab nrog cov haujlwm sib xyaw kom nthuav dav lawv cov chaw thov. Piv txwv li, kev txhim kho cellulose muaj kev hais ua tus kheej nrog kev kho tus kheej thiab cov kev xaiv muaj tswv yim zoo rau cov khoom siv ntse thiab ntse tsim khoom lag luam.
Ua ib qho tseem ceeb lub neej lim hiam, cellulose cov neeg muaj kev hais ua cell muaj ntau yam ntawm cov ntawv thov. Nrog rau qhov sib txawv ntawm kev tshawb fawb, cov cuab yeej siv hluavtaws, hloov kho thiab cov ntawv thov ntawm cellulose tseem niaj hnub nthuav dav. Nyob rau yav tom ntej, cellulose cov neeg muaj kev pab rau kev tsim kho ntawm kev tiv thaiv ntsuab, thiab ua lub luag haujlwm tseem ceeb hauv kev lag luam ntau yam.
Lub Sijhawm Post: Feb-17-2025