Hydroxye Etheny Cellulose (HEC) yog cov khoom siv polymer, uas ua lub luag haujlwm tseem ceeb hauv ntau yam kev siv hauv cov tshuaj noj. Cov dej -solule polymer yog nyob rau hauv cellulose, thiab cellulose yog lub ntuj polymer pom nyob rau hauv cov nroj tsuag ntawm phab ntsa. Cov kev qhia txog cov pab pawg hydroxyl tuaj yeem txhim kho cov solubility ntawm dej thiab hloov kho lub cev thiab tshuaj ntawm cellulose.
1. Taw qhia rau hydroxye Ethyl (HEC)
Hydroxye ether yog ib tug derivative ntawm cellulose, thiab cellulose yog ib chav tsev zoo li kev sib txuas los ntawm β-1,4-glycoside daim ntawv cog lus. Cov pab pawg hydroxyl hauv HEC tau qhia los ntawm kev tiv thaiv nrog oxide. Qhov kev hloov pauv no tau txhim kho rau solubility ntawm cov neeg polymer hauv dej, thiab muab nws nrog cov cim tshwj xeeb ntawm nrhiav cov ntawv thov hauv ntau cov txheej txheem.
2. Tus qauv thiab cov yam ntxwv ntawm HEC
Tus qauv: Cov pab pawg hydroxyl yog txuas nrog cov pab pawg hydroxyl ntawm lub ntsiab tseem ceeb ntawm cellulose, uas muab cov qauv kev sib tw. Cov qib hloov pauv (DS) sawv cev rau cov pawg nruab nrab ntawm cov pawg hydroxyl ntawm txhua chav dej hli thiab cuam tshuam cov yam ntxwv ntawm cov polymer.
Solubility: HEC tuaj yeem yooj yim tawm hauv dej txias, ua cov pob tshab thiab cov tshuaj pleev xim. Cov nyhuv ntawm solubility yog cuam tshuam los ntawm yam xws li kub, Ph thiab ion muaj zog.
Viscosity: Ib qho ntawm cov tseem ceeb ntawm HEC yog nws lub peev xwm los hloov lub viscosity ntawm kev daws. Qhov no ua rau nws muaj nuj nqis hauv kev lag luam uas tswj cov kua dej ua kua.
3. Khoom cua ntawm hydroxyl cov tshuaj cellulose
Cov tshuaj tiv thaiv ua tau zoo: synthesis ntawm hec cuam tshuam cov tshuaj tiv thaiv ntawm cellulose ntawm cellulose ntawm cellulose alkaline catalysts. Koj tuaj yeem tswj cov qib hloov los ntawm kev kho cov tshuaj tiv thaiv kab mob (xws li qhov kub thiab txias, thiab kev tawm tsam muaj kev pom zoo).
Purification: Cov khoom kawg yog feem ntau ua rau tshem tawm cov impurities thiab tsis muaj cov tshuaj tiv thaiv kom ntseeg tau tias cov yam ntxwv xav tau ntawm HEC.
4. Tshuaj Lom
Cov xim pleev xim thiab txheej txheem: HEC tau dav siv raws li thickening thiab stabilizers hauv cov xim uas pleev xim thiab pleev xim. Nws txhim kho cov ntawv thov cov cai thiab txhim kho cov xim pleev xim.
Cov tshuaj pleev ib ce thiab cov khoom siv saib xyuas tus kheej: Vim nws cov dej daws teeb meem, HEC tuaj yeem pom muaj nyob hauv ntau cov tshuaj pleev ib ce thiab cov tshuaj txhuam ntawm tus kheej thiab qab zib.
Tshuaj: Hauv cov tshuaj, HEC yog siv los ua cov ntsiav tshuaj, zaj duab xis thiab viscosity transmifiers, cov ntsiav tshuaj thiab cov leeg nqaij hauv zos thiab tswj cov khoom sib faib hauv zos.
Kev lag luam tsim: HEC yog siv rau cov ntaub ntawv tsim tsev, xws li collegased cug thiab cov nplaum los txhim kho cov cim thiab cov nplaum.
5. Lub luag haujlwm hauv dej-cov nplaum
Cov Lus Mis Los: Sib Txhawb Hec mus rau cov dej nplaum kom muab cov yam ntxwv nplaum kom muab cov khoom nplaum ntawm viscosity tswj, ruaj ntseg thiab txhim kho. Nws yog qhov tshwj xeeb siv nyob rau hauv cov ntawv thov tsis tsim nyog ntawm cov kuab tshuaj-grased cov nplaum.
6. Txhim Kho Cov Roj Rov Qab
Viscosity Monifier: Hauv cov roj thiab ntuj muaj kev lag luam, HEC yog siv ua Viscosity hloov kho cov roj rov qab (xws li cov txheej txheem. Nws txhim kho cov viscosity ntawm dej siv rau kev txhaj tshuaj, yog li txhim kho qhov chaw ntawm cov roj hauv cov reservoir.
7. Ib puag ncig cuam tshuam thiab muaj kev ruaj khov
Bio degradation: HEC feem ntau suav tias yog biodegradable thiab pab nws qhov kev txuag ib puag ncig. Txawm li cas los xij, qhov kev ua kom muaj kev ruaj ntseg ntawm nws cov chaw tsim khoom nyob ntawm cov khoom xws li cellulose thiab kev tsim khoom.
8. Sib tw thiab yav tom ntej pom
Biocompatibility: txawm hais tias HEC feem ntau suav tias muaj kev nyab xeeb, nws cov txiaj ntsig kev noj qab haus huv, tshwj xeeb hauv kev kho mob thiab tshuaj, tseem yog kev tshawb fawb.
Green Gumnity: Kev ua haujlwm tsis tu ncua tsom rau kev txhim kho ntawm ntau cov kev phooj ywg synthesis los txo cov kev cuam tshuam ib puag ncig ntawm nws ntau lawm.
Hydroxyyl cellulose ua lub luag haujlwm tseem ceeb hauv ntau daim ntawv thov tshuaj, muab ib qho tshwj xeeb ntawm cov dej -soluble, viscosity hloov thiab biodegradation. Nws cuam tshuam cov kev lag luam xws li pleev xim, tshuaj pleev ib ce, tshuaj, cov nplaum thiab roj rov qab. Nrog kev tshawb fawb txuas ntxiv, qhov xwm ntawm HEC thiab nws cov peev xwm thov hauv cov teb tshwm sim yuav nthuav dav, yog li txuas ntxiv qhov tseem ceeb rau cov Chemistry Field.
Hydroxye Ethyl cellulose ua pov thawj cov kev ua tau zoo hauv kev sib tham rau ntau qhov chaw uas vam khom cov ntaub ntawv kom tau txais kev ua tau zoo tshaj plaws.
Lub Sijhawm Post: Feb-19-2025