Hydroxyethyl Methyl Cellulose (HEMC)Yog ib qho tseem ceeb ntawm ove compound thiab belongs rau cov tsis muaj ionic cellulose ether. HEMC yog tau los ntawm kev hloov kho tshuaj lom neeg nrog cov ntaub ntawv muaj ntuj ntawm cov khoom siv. Nws cov qauv muaj cov qauv hydroxyethyl thiab cov tshuaj methyl chaw, yog li nws muaj cov khoom siv lub cev thiab siv tshuaj lom neeg txhua hnub, tshuaj txhua yam thiab lwm thaj chaw.
1. Lub cev thiab tshuaj lom neeg
HEMC feem ntau yog xim dawb lossis tawv nqaij dawb lossis cov pob zeb dawb, uas yog cov soluble yooj yim hauv dej txias los tsim lub pob tshab lossis me ntsis turbid colloidal tov. Nws cov yam ntxwv tseem ceeb muaj xws li:
Solubility: HEMC tuaj yeem yaj tuaj sai sai hauv dej txias, tab sis muaj cov tub rog tsis zoo hauv dej kub. Nws solubility thiab viscosity hloov pauv nrog kev hloov hauv qhov kub thiab txias thiab tus nqi PH.
Thickening cov nyhuv: HEMC muaj lub peev xwm ua kom muaj peev xwm ua kom muaj peev xwm ua kom muaj peev xwm hauv dej thiab tuaj yeem ua kom muaj kuab paug ntawm kev daws teeb meem.
Dej khaws cia: Nws muaj dej ua kom tau zoo heev thiab tuaj yeem tiv thaiv kom tsis txhob muaj dej poob hauv cov khoom.
Zaj duab xis-hem cov cuab yeej: HEMC tuaj yeem tsim cov khoom sib txawv ntawm zaj duab xis nyob rau saum npoo nrog qee yam nyuaj thiab lub zog.
Lubricity: Vim nws cov qauv molecular, HEMC tuaj yeem muab cov tshuaj rau lubrication zoo heev.
2. Cov Txheej Txheem Ntau Lawm
Cov txheej txheem ntau lawm ntawm Hemc tsuas yog suav nrog cov kauj ruam hauv qab no:
Alkalization: cov cellulose ntuj raug kho tau kho nyob rau hauv Alkaline tej yam kev mob los ua alkali cellulose.
ETherification tiv thaiv: los ntawm kev ntxiv methylating cov neeg sawv cev (xws li ethyl chloride (xws li ethylene cov tshuaj tiv thaiv ntawm qhov kub thiab siab.
Tom qab kev kho mob: cov khoom lag luam nyoos yog neutralized, ntxuav, qhuav, thiab crushed thaum kawg tau txaisTus tseem ceebCov khoom lag luam.
3. Cov chaw thov tseem ceeb
(1) Cov ntaub ntawv hauv tsev hemc tau dav siv hauv kev tsim kho hauv tsev, feem ntau yog cov hmoov xis, putty hmoov, nplais nplaum, gypsum thiab lwm yam khoom. Nws tuaj yeem txhim kho lub piscosity, dej tuav thiab tawm tsam kev ua haujlwm sagging ntawm cov ntaub ntawv tsim kho, nthuav dav lub sijhawm qhib, thiab txhim kho kev ua haujlwm.
(2) cov xim pleev xim rau cov xim pleev xim, hemc ua raws li cov tuab tuab thiab emulsifier khov kho thiab emulsifier stabscosity los txhim kho cov xim thiab tiv thaiv cov txheej los ntawm sagging. Ib qho ntxiv, nws tuaj yeem muab cov yeeb yaj kiab zoo-ua yeeb yam, ua cov xim saum npoo ntau yam zoo nkauj dua thiab du.
(3) tshuaj thiab cov tshuaj pleev ib ce HEMC tuaj yeem siv los ua cov tshuaj nplaum thiab cov yeeb yaj kiab ua yeeb yaj kiab hauv cov ntsiav tshuaj, nrog rau cov ntaub tuab thiab dej noo hauv cov khoom tu tawv nqaij. Vim yog nws txoj kev nyab xeeb thiab kev nyab xeeb, feem ntau nws siv nyob rau hauv cov khoom lag luam xws li cov tee qhov muag, cov tshuaj ntxuav lub ntsej muag, thiab muaj cov tshuaj ntxuav.
(4) Cov tshuaj txhua hnub hauv cov tshuaj lom zem txhua hnub xws li cov tshuaj txhuam hniav thiab cov tshuaj txhuam hniav yog siv los ua cov thickener thiab stabilizer kom txhim kho lub rheology thiab ruaj khov ntawm cov khoom.
4. Qhov zoo thiab kev tiv thaiv ib puag ncig
HEMC muaj cov biodegradity thiab ib puag ncig tiv thaiv cov yam ntxwv thiab yuav tsis ua rau ib puag ncig kev ua qias tuaj ntev rau ib puag ncig. Nyob rau tib lub sijhawm, nws tsis yog-lom thiab tsis muaj kev phom sij, tsis muaj kev txob tshuaj rau tib neeg cov tawv nqaij thiab cov kev tiv thaiv ntawm cov kev tiv thaiv ntsuab ib puag ncig thiab kev txhim kho kom ruaj khov.
5. Kev Lag Luam Kev Lag Luam thiab Kev Loj Hlob Loj
Nrog kev txhim kho kev tsim kho kev tsim kho thiab kev lag luam txhua hnub, kev lag luam xav tau HEMC tseem loj hlob ntxiv. Nyob rau yav tom ntej, raws li cov neeg them ntau dua rau cov khoom siv phooj ywg ib puag ncig thiab txuas ntxiv txhim kho cov khoom lag luam, hemc yuav siv ntau dua hauv ntau thaj teb. Ntxiv rau, cov kev tshawb fawb thiab kev nthuav dav ntawm cov khoom lag luam tshiab femc (xws li hom kub siab tiv thaiv (hom ntawv tam sim no) tseem yuav txhawb nws daim ntawv thov hauv kev ua lag luam siab.
Raws li kev ua haujlwm ntau ntau thiab kev ua tau zoo ether,Hydroxyether Metthylcellulose (Hemc)Ua lub luag haujlwm tseem ceeb hauv kev tsim kho, tshuaj, tshuaj thiab lwm thaj teb nrog nws lub cev thiab tshuaj lom neeg tshwj xeeb. Nrog kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis thiab kev nthuav dav ntawm daim ntawv thov teb, hemc yuav ua rau kev lag luam muaj zog dua rau kev txhim kho kev lag luam ntsig txog kev lag luam.
Lub Sijhawm Post: Nov-11-2024