Tshuab ntawm cov cellulose muaj neeg muaj kev pab

Lub thev naus laus zis ntawmNeeg muaj neeg ua haujlwmYuav cov kev hloov kho ntawm cellulose, lub ntuj polymer muab los ntawm tsob ntoo ntawm phab ntsa, los tsim derivatives nrog cov khoom tshwj xeeb thiab kev ua haujlwm. Feem ntau cov ntaub ntawv ntawm lub xov tooj ntawm cov xov tooj ntawm cov xov tooj ntawm cov xov tooj me hydroxyylcellulose (HECC), cov celluleethethyl cellulose (MC), thiab cov cellulose cellulose (EC). Ntawm no yog ib tug txheej txheem cej luam ntawm cov thev naus laus zis siv hauv kev tsim cov kev pab cuam Cellulose:

1. Cov Khoom Siv Raw:
   • Cellulose qhov chaw: thawj cov khoom siv raw rau cellulose muaj cov neeg muaj kev hais ua ke yog cellulose, uas tau los ntawm ntoo pulp lossis paj rwb. Lub hauv paus cellulose cuam tshuam rau cov khoom ntawm cov cellule cov khoom kawg ether.
2. Kev npaj ntawm cellulose:
   • Pulping: Ntoo pulp lossis paj rwb yog raug rau pulping cov txheej txheem kom tawg cov cellulose fibulose rau hauv daim ntawv tswj xyuas ntxiv.
   • Purification: Lub cellulose kom tshem tawm impurities thiab tsau, ua rau muaj cov khoom siv ua kom huv.
3. Tshuaj Kho Mob Tshuaj:
   • Kev tiv thaiv kab ntsig: Cov kauj ruam tseem ceeb hauv kev hloov kho ether yog cov tshuaj lom neeg ntawm cellulose los ntawm etherification tiv thaiv. Qhov no cuam tshuam nrog cov pab cuam etherethetyl, hydroxyprropyl, hydroxethyl, lossis ethyl pab pawg ntawm cellOpe Polymer saw.
   • Kev xaiv ntawm reagents: reagents xws li ethylene oxide, sodium chloroacetate, lossis methyl chloride muaj feem ntau siv nyob rau hauv cov kev tiv thaiv no.
4. Tswj ntawm cov tshuaj tiv thaiv:
   • Qhov kub thiab txias thiab siab: Cov tshuaj tiv thaiv feem ntau yog ib txwm ua raws nraim li cov kev tswj hwm kub thiab lub siab cov txheej txheem kom ua tiav qib siab (DS) thiab zam kev sab nrauv.
   • Alkaline tej yam kev mob: ntau cov tshuaj tiv thaiv kab ntsig tau ua nyob rau hauv cov kev mob alkaline, thiab ph ntawm cov tshuaj tiv thaiv sib xyaw ua tib zoo saib xyuas.
5. Purification:
   • Neutralization: Tom qab lub here eretification cov tshuaj tiv thaiv, cov khoom lag luam yog feem ntau cia li tshem tawm ntau dhau kev sib txheeb lossis cov khoom lag luam.
   • Ntxuav: cov cellulose hloov tau ntxuav kom tshem tawm cov tshuaj thiab tsis zoo.
6. Drying:
   • Lub cellulose cellulose ether yog qhuav kom tau txais cov khoom kawg hauv cov hmoov lossis daim ntawv puab.
7. Tswjhwm Zoo:
   • Kev Ntsuam Xyuas: Ntau hom kev sib tw, xws li kev sib nqus kev sib nqus Nuclear, thiab cov checker-transformy, ftir) spectroscopy, thiab chromatography, yog ua haujlwm los txheeb xyuas cov qauv thiab cov khoom ntawm cov kws hais ua cellulose.
   • Qib ntawm kev hloov pauv (DS): DS, uas sawv cev ntawm cov chaw nruab nrab ntawm ib chav nyob rau ib chav ntawm ib qho kev tswj hwm lub sijhawm ntau lawm.
8. Tsim thiab Daim Ntawv Thov:
   • Xaus cov qauv tsim: Cov neeg hais txog cellulose tau muab cov neeg siv rau thaum muaj ntau yam lag luam, suav nrog kev tsim kho, kev saib xyuas, thiab kev saib xyuas tus kheej, thiab kev saib xyuas tus kheej, thiab kev saib xyuas tus kheej.
   • Cov kev thov cov qhab nia tshwj xeeb: Cov qib kev sib txawv ntawm cov neeg ua haujlwm hauv cellulose tau tsim los ua kom tau raws li cov kev thov tshwj xeeb.
9. Kev Tshawb Fawb thiab Kev Tsim Kho:
   • Kev Txhim Kho Nraum: Kev tshawb nrhiav thiab kev tshawb fawb kom pom tseeb ntawm kev txhim kho cov txheej txheem ntau lawm, txhim kho cov kev ua tau zoo ntawm cellulose neeg muaj kev pab, thiab tshawb cov ntawv thov tshiab.

Nws yog ib qho tseem ceeb kom nco ntsoov tias thev naus laus zis rau kev ua kom paub cov neeg ua haujlwm ntawm cellulis tshwj xeeb yuav sib txawv raws li cov khoom xav tau thiab cov ntawv thov. Txoj kev hloov kho ntawm cellulose los ntawm etherification cov tshuaj tiv thaiv pub rau ntau yam ntawm cellulos muaj kev ua kom muaj kev ua haujlwm ntau yam, ua rau lawv muaj txiaj ntsig zoo hauv ntau yam kev lag luam.