I-Hydroxypropyl methyl cellulose (HPMC), impahla eluhlazacellulose, ingahlanzwa ukotini noma uginindela wezinkuni. Kuyadingeka ukudicilela phansi ngaphambi noma ngesikhathi senqubo ye-alkalization. Ukungcola kwenziwa ngamandla emishini. Ukubhubhisa ukwakheka okuhlanganisiwe kwezinto zokusetshenziswa kwe-cellulose ukunciphisa i-crystallity kanye ne-polymerization degree futhi kwandise indawo yayo engaphezulu, ngaleyo ndlela kuthuthukise ukufinyeleleka kanye nekhono lokuphendula amakhemikhali lamaqembu ama-realevose ama-glucose ring.
I-Hydroxypropyl methyl cellulose (HPMC)isetshenziswa njenge-substrate engavuthiwe yokukhiqiza uwoyela, ongakubona ukusetshenziswa koshukela wonke, athuthukise izinga lokusetshenziswa kwezinto zokusetshenziswa, anciphise inani elisele le-substrate emfuleni wokuvutshelwa, futhi anciphise izindleko zokwelashwa kwamanzi amdaka. Izici zemethyl cellulosezilungele ukusebenza kahle kwe-batch, i-fed-batch nezinqubo eziqhubekayo zokuvutshelwa, ukugwema uchungechunge lwezinkinga ezinjengokulawula ukwakheka kwezinga eliphakathi nendawo kanye ne-dilution; Ngasikhathi sinye, kusiza futhi ekuqondisweni kwenqubo yokuvutshelwa. Ngoba izakhiwo zeI-Hydroxypropyl methyl cellulose (HPMC)ziyefana nezinye izithambisa amanzi, zingasetshenziswa njenge-ejenti eyakha amafilimu, i-emulsifier, i-emulsifier kanye ne-stabilizer e-latex coatings kanye nezinto ezihlanganisiwe zamanzi, okwenza kube nokwenza ukumboza okuhle kwefilimu, ukuvelela Izakhiwo kanye nokunamathelisa, futhi kuthuthukise ukungezwani komhlaba, ukuqina ku-acid ne-alkali, kanye nokuhambisana nemibala yensimbi.
I-Hydroxypropyl methyl cellulose (HPMC)Inomphumela omuhle njengomuntu omkhulu we-White Polyvinyl Acetate ACETATE. Izinga lokufaka esikhundleni seI-Cellulose Etherkuyanda, futhi ukumelana namagciwane nokuguguleka kuyathuthukiswa.
Yize umgomo wokuhlongozwa kwe-hydroxypropyl (hpmc) awunzima, kuyinto yokulwa, ukuqhekeka okubonakalayo okuluhlaza, nokuqhuma kwezinto ezibonakalayo, kanye ne-alkalization. Izindawo ezahlukahlukene zokuthengwa, ukululama okulula, ukuhlukaniswa kwe-centrifugal, ukugeza nokomiswa kubandakanya inani elikhulu lobuchwepheshe obukhulu nolwazi olucebile.
Ngezinhlobo ezahlukene zemikhiqizo, imvelo ngayinye inezimo zakamuva zokulawula, njengokushisa, isikhathi, ingcindezi nokulawulwa kokugeleza kwezinto ezibonakalayo. Imishini yokusiza nokulawula izinsimbi zokulawula ziyisiqinisekiso esithembekile nesizuzisayo sekhwalithi yomkhiqizo ezinzile nohlelo lokukhiqiza oluthembekile.
Izici zomkhiqizo zehydroxypropyl methyl cellulose:
1. Izakhiwo: Lo mkhiqizo uwumpuphu omhlophe, futhi unephunga elingenamphumulo, alinambitha futhi alinobuthi.
2. Umphumela wokugcina amanzi: ngoba lo mkhiqizo ungadonsa amanzi amahlandla aphindwe kaningana kunawodwa. Gcina ukugcinwa kwamanzi okuphezulu ngodaka, i-gypsum, upende neminye imikhiqizo.
3. Lo mkhiqizo ungachithwa emanzini abandayo ukwakha i-solvent esobala ye-viscous.
4. Ukuchithwa ku-Organic Solvents: Ngoba iqukethe inani elithile lezakhi zofuzo hydrophobic, lo mkhiqizo ungachithwa kwezinye izixazululo ze-organic, futhi futhi ungachithwa kuma-solvents ahlanganisiwe amanzi nama-organic.
I-5 Esimweni se-electrolyte eningi kakhulu, kungadala ukubheja noma ukuhanjiswa kwezulu.
I-6. UMSEBENZI WOKUQALA
Isikhathi Sokuthumela: Nov-29-2021
