IHydroxYethyl Cellulosei-cellulose ebalulekile etholwayo. Ngenxa yezinzuzo zezinsizakusebenza eziningi ezisetshenziswayo eziluhlaza, ezingavuselelwa, ezinobuthi, ukungabikhona okunobuthi, ukuqina okuhle, kanye nesivuno esikhulu, ucwaningo lwayo kanye nohlelo lokusebenza lukudonsele ukunakwa kakhulu. . Inani le-Viscosity liyinkomba yokusebenza ebaluleke kakhulu ye-Hydroxyethyl cellulose. Kuleli phepha, i-hydroxyyethyl cellulose enenani le-viscosity ngenhla kwe-5 × 104mpa nye nenani lomlotha ngaphansi kwe-0.3% yalungiswa nge-alkali-esigabeni se-alkalization kanye nenqubo yokufaka izinyathelo ezimbili.
Inqubo ye-alkalization inqubo yokulungiselela ye-Alkali Cellulose. Kuleli phepha, kusetshenziswa izindlela ezimbili ze-alkalization. Indlela yokuqala ukusebenzisa i-acetone njengedilient. Izinto ezisetshenziswayo ze-cellulose ezifuywayo ziba khona ngokuqondile ekuhluni kwe-sodium hydroxide awdroxide adroxide addroxide. Ngemuva kokuthi ukusabela okuyisisekelo kwenziwa, i-ejenti etherati ingeziwe ekufezeni ngqo ukusabela kokuthezeka. Indlela yesibili ukuthi izinto ezisetshenziswayo ze-cellulose eluhlaza zifakwe kwisisombululo esinamanzi se-sodium hydroxide ne-urea, kanye ne-alkali cellulose elungiselelwe yile ndlela kumele idonswe ukuze ikhiphe ukuphendula ngokweqile ngaphambi kokuphendula okuthe xaxa. I-Alkali Cellulose elungiselelwe izindlela ezahlukahlukene yahlaziywa yi-infrared spectroscopy kanye ne-X-RAY. Ngokwezakhiwo zemikhiqizo elungiselelwe ukusabela kokuthezeka, indlela yokukhetha inqunywa.
Ukuze unqume inqubo engcono kakhulu yokuhlobanisa i-ethertheisation, indlela yokuphendula ye-antioxidant, i-ly kanye ne-glacial acetic acid ekuphenduleni ukusheshisa kwahlaziywa kuqala. Ngemuva kwalokho yakha uhlelo lokuhlola lokuphendula okukodwa, thola izici ezinomthelela omkhulu ekusebenzeni kwe-hydroxyethyethyl cellulose elungiselelwe, futhi usebenzise i-viscosity yesisombululo esingamanzi esingu-2% njengenkomba yereferensi. Imiphumela yokuhlola ikhombisa ukuthi izici ezinjengenani elikhethiwe le-diluent, inani le-ethylene oxide elengeziwe, isikhathi sokushisa, izinga lokusabela kokuqala, izinga lokushisa lesibili konke kuthonya elihle ekusebenzeni kwe umkhiqizo. Isikimu sokuhlola i-orthogonal esinezici eziyisikhombisa namazinga amathathu sakhiwa, futhi umphumela wejika osudonswayo emiphumeleni yokuhlola ungahle uhlaziye ngezinto eziyinhloko nangokwesiko kanye nomkhuba wethonya lento ngayinye. Ukuze ulungiselele imikhiqizo enezindinganiso eziphakeme ze-viscosity, kwakhiwa uhlelo lokuhlola olwenziwe kahle, kanye nohlelo olufanele lokulungiselela ama-hydroxyethyl cellulose ekugcineni kwanqunywa ngemiphumela yokuhlola.
Izakhiwo ze-Vispecred High-ViscosityIHydroxYethyl Cellulosebahlaziywa futhi bahlolwe, kufaka phakathi ukuzimisela kokubonakala, okuqukethwe kwe-Ash, ukudluliselwa okukhanyayo, okuqukethwe umswakama, ukuphikisana ne-tramography ye-inframetic, ukusetshenziswa kwe-thermogravimetric, kusetshenziswa ezinye izindlela zokushisa Ukuhlaziya futhi ubonise ukwakheka komkhiqizo, ukufana komkhiqizo, ukufakwa esikhundleni se-molar actitution degree, crystaltaltity degree, i-crystallity, ukuqina okushisayo, njll. Izindlela zokuhlola zibhekisela kumazinga we-ASTM.
I-Hydroxyyethyl cellulose, i-cellulose ebonakalayo ebonakalayo, idonsele ukunakwa ngenxa yezinsizakusebenza zayo eziningi ezisetshenziswayo, ezingavuselelwa, ezingahambelani, i-nontoxic, i-biofemade, nesivuno esiphakeme. I-viscoxyethyl celtulose iyinkomba ebaluleke kakhulu yokusebenza kwayo. I-viscosity ye-hydroxyyethyyll cellulose elungiselelwe ingaphezulu kwe-5 × 104MPA S, kanye nokuqukethwe komlotha kungaphansi kuka-0.3%.
Kuleli phepha, i-high-viscoxyethyl celtulose yalungiswa yindlela yokuhlanganiswa kwesigaba se-liquid-siquid ngokusebenzisa i-alkalization kanye nokuthezeka. Inqubo ye-Alkalization ukulungiswa kwe-Alkali Cellulose. Khetha ezindleleni ezimbili ze-alkalization. Eyokuqala ukuthi impahla ye-cellulose ihlanganiswe ngqo ne-acetone njenge-dilone kwikhambi le-aquous sodium hydroxide solution, bese lithola ukusabela kokuthezeka nge-ejenti etherati. Okunye ukuthi impahla ye-cellulosic ihlanganiswe ngesixazululo se-sodium hydroxide solution kanye ne-urea. I-alkali eyeqile e-Alkali Cellulose kumele isuswe ngaphambi kokuphendula. Kuleli phepha, amaselula ahlukahlukene e-Alkali afunwa yi-infrared spectroscopy kanye ne-X-ray. Ekugcineni, indlela yesibili yamukelwa ngokuya ngezakhiwo zemikhiqizo yokuthezeka.
Ukuze unqume izinyathelo zokulungiswa kokuthezeka, indlela yokuphendula ye-antioxidant, i-alkali kanye ne-acetic acetic acid ehlelweni lokudla yafundwa. Izici ezithinta ukulungiswa kwe-hydroxyethyl celtulose zazinqunywe ngokuhlolwa okukodwa. Kususelwa kunombolo ye-viscosity yomkhiqizo esikhangini esingu-2% esinamanzi. Imiphumela yokuhlola ikhombisa ukuthi ivolumu ye-dillont, inani le-ethylene oxide, isikhathi sokulinganisa, izinga lokushisa nesikhathi sokuvuselelwa kwesibili kunethonya elikhulu ekusebenzeni komkhiqizo. Indlela yezici eziyisikhombisa namazinga amathathu yamukelwa ukuthola indlela engcono kakhulu yokulungiselela.
Sihlaziya izakhiwo zalabo abalungisiweIHydroxYethyl Cellulose, kufaka phakathi i-viscosity, umlotha, ukudluliselwa okukhanyayo, umswakama, njll. I-homegeneity, i-crystallity kanye nokuqina kwe-chromationess, i-chromatography, i-DSC kanye ne-DAT, kanye ne Izindlela zokuhlola ezamukelwa amazinga we-ASTM.
Isikhathi sePosi: APR-25-2024