Ama-cellulose ashers, asI-methylcellulose (MC),I-Hydroxypropyl methylcellulose (HPMC), futhiI-Carboxymethyl Cellulose (CMC), kusetshenziswa kabanzi kuzicelo ezahlukahlukene kufaka phakathi amakhemisi, ukwakhiwa, kanye nezimboni zokudla. Enye yezindawo ezibucayi ze-cellulose afers ngekhono labo lokugcina amanzi, okubalulekile ekusebenzeni kwawo kulezi zinhlelo zokusebenza. Ukugcinwa kwamanzi kuqinisekisa ukuthi lokho okuqukethwe kuhlala kuyindlela oyifunayo futhi kusebenza ngempumelelo, kungaba ngesixazululo esiqinile, ijeli, noma njengengxenye ye-matrix.
1.-Kuphokophelelwe
Inhloso yokuhlolwa kokugcinwa kwamanzi ukukala inani lamanzi i-cellulose ether engabamba ngaphansi kwemibandela ethile. Le mpahla ibalulekile ngoba inomthelela ekusebenzeni, ukuqina, kanye nokwenza umsebenzi we-cellulose ether-based imikhiqizo ezindaweni ezahlukahlukene.
2.Isimiso
Ukugcinwa kwamanzi kunqunywa ngokukala isisindo samanzi agcinwe yi-cellulose ether lapho ngaphansi kokuhlolwa okujwayelekile. Imvamisa, ingxube ye-cellulose ether ilungiselelwe ngamanzi, bese inani lamanzi amahhala ancishisiwe noma akhishwe yingxube ngaphansi kwengcindezi kulinganiswa. Ukugcinwa kwamanzi okuphezulu, kuba namandla amakhulu we-cellulose ether ukubamba umswakama.
3.Izinsizakusebenza kanye nezinto zokwakha
Isampula yokuhlola:I-cellulose ether powder (isib. MC, HPMC, CMC)
Amanzi (ancishisiwe)- Ukulungiselela ingxube
Izinsizakusebenza Zokugcina Amanzi- Iseli lokuhlola elijwayelekile lokugcina amanzi (isib. I-funnel ngesikrini se-mesh noma idivaysi ye-filltration)
Ukuzimelela- Ukukala isampula namanzi
Iphepha lokuhlunga- Ukugcina isampula
I-CYLUDER YOKUQHAWULA- Ukukala inani lamanzi
Umthombo Wengcindezi- Ukunciphisa amanzi amaningi (isib., Cindezela olayishwe entwasahlobo noma isisindo)
Umninisikhathi- Ukulandela isikhathi sokulinganisa kokugcinwa kwamanzi
Thermostat noma incubator- Ukugcina izinga lokushisa lokuhlola (imvamisa emazingeni okushisa asekamelweni, cishe ngo-20-25 ° C)
4.Indlela yokwenza izinto
Ukulungiselela isampula:
Sika inani elaziwayo le-cellulose ether powder (imvamisa amagremu ama-2) ngokunemba esele esele.
Hlanganisa i-cellulose ether powder ngenani elithile lamanzi anciphile (isib., 100 ml) ukudala i-slurry noma unamathisela. Govuza le ngxube ukuze uqinisekise ukuhlakazeka okufanayo kanye ne-hydration.
Vumela le ngxube ibe yi-hydrate isikhathi esiyimizuzu engama-30 ukuqinisekisa ukuvuvukala okugcwele kwe-cellulose ether.
Ukusetha kwama-Affatus okugcina amanzi:
Lungiselela ama-appratus wokugcina amanzi ngokubeka iphepha lokuhlunga kuyunithi ye-filtration noma i-funnel.
Thela i-cellulose ether slurry ephepheni lokuhlunga futhi uqinisekise ukuthi kusakazeka ngokulinganayo.
Ukulinganisa Okugciniwe:
Faka ingcindezi kwisampula noma ngesandla noma ngokusebenzisa umshini wokulayisha wasentwasahlobo. Inani lengcindezi kufanele lilinganiswe kuzo zonke izivivinyo.
Vumela uhlelo ukuthi lukhiphe imizuzu emi-5 ukuya kwengama-10, lapho amanzi amaningi azohlukaniswa khona ne-slurry.
Qoqa amanzi ahlungiwe kusilinda esithweswe iziqu.
Ukubalwa kokugcinwa kwamanzi:
Ngemuva kokuthi inqubo yokudonsa isiqediwe, bheka amanzi aqoqiwe ukuthola inani lamanzi alahlekile.
Bala ukugcinwa kwamanzi ngokususa inani lamanzi amahhala kusuka kunani lokuqala lamanzi asetshenziswe kwingxubevange yesampula.
Ukuphindaphinda:
Yenza isivivinyo ngophawu lwesampula ngalinye le-cellulose ukuqinisekisa imiphumela enembile nezenzekayo. Inani elijwayelekile lokugcina amanzi lisetshenziselwa ukubika.
5.Ukuhunyushwa kwedatha
Umphumela wokuhlolwa kokugcinwa kwamanzi kuvame ukuvezwa njengamaphesenti wamanzi agcinwe isampula ye-cellulose ether. Ifomula ukubala ukugcinwa kwamanzi yile:
Le formula isiza ukuthi ihlole amandla okubamba amanzi we-cellulose afers ngaphansi kwezimo ezibekiwe.
6.Ukuhluka kokuhlola
Ukuhlukahluka kokuhlolwa okuyisisekelo kokugcina amanzi kufaka:
Ukugcinwa kwamanzi okuncike esikhathini:Kwezinye izimo, ukugcinwa kwamanzi kungalinganiswa ngezikhathi ezithile ezihlukile (isib., 5, 10, 15 imizuzu) ukuqonda ama-Kinetics wokugcinwa kwamanzi.
Ukugcinwa okuvimbela izinga lokushisa:Ukuhlolwa okwenziwe emazingeni okushisa ahlukene kungakhombisa ukuthi izinga lokushisa lithinta kanjani ukugcinwa kwamanzi, ikakhulukazi ngezinto ezibucayi.
7.Izici ezithinta ukugcinwa kwamanzi
Kunezici eziningana zingathonya ukugcinwa kwamanzi ama-cellulose afes:
I-Viscosity:I-Cellulose Tashers enokubonakala okuphezulu ivame ukugcina amanzi amaningi.
Isisindo samangqamuzana:I-Molecular Weight Cellulose Taeltuleose ivame ukuba nomthamo ongcono wokugcina amanzi ngenxa yesakhiwo sabo esikhulu samangqamuzana.
Degree of inhlanganisela:Ukuguqulwa kwamakhemikhali ze-cellulose afer (isib., Izinga le-methylation noma i-hydroxypropylition) lingathinta kakhulu izakhiwo zazo zokugcina amanzi.
Ukugxila kwe-cellulose ether engxenyeni:Ukugxila okuphezulu kwe-cellulose ether ngokuvamile kuholela ekugcinweni kwamanzi okungcono.
8.Ithebula lesampula: Imiphumela Yesibonelo
| Uhlobo lwesampula | Amanzi okuqala (ml) | Waqoqa amanzi (ml) | Ukugcinwa kwamanzi (%) |
| I-methylcellulose (MC) | 100 | 70 | I-30% |
| I-Hydroxypropyl methylcellulose (HPMC) | 100 | 65 | 35% |
| I-Carboxymethyl Cellulose (CMC) | 100 | 55 | 45% |
| I-Viscosity ephezulu ye-MC | 100 | 60 | 40% |
Kulesi sibonelo, amanani okugcinwa kwamanzi akhombisa ukuthi isampula le-carboxymethyllls (CMC) linokugcinwa kwamanzi okuphezulu kakhulu, kanti i-methylcellulose (MC) igcinwa kakhulu.
Ukuhlolwa kokugcinwa kwamanzi kwe-cellulose afers kuyindlela ebalulekile yokulawula ikhwalithi yokulinganisa amandla walezi zinto zokubamba amanzi. Imiphumela isiza ukunquma ukufaneleka kwe-cellulose ether ukuthola izinhlelo ezithile, ezifana nokwakhiwa lapho ukulawula umswakama kubalulekile. Ngokwenza inqubo yokuhlola, abakhiqizi bangaqinisekisa ukusebenza okungaguquki kwemikhiqizo yabo ye-cellulose ether futhi banikeze idatha ewusizo yokuthuthukiswa komkhiqizo.
Isikhathi sePosi: Feb-19-2025