1. Indlela yokuchithwa kwe-ethyl cellulose
I-Ethyl Cellulose (EC) iyikhemikhali elenziwe ngokulandelana kwemvelo yemvelo, enobuthi obuhle, okungeyona ubuthi kanye nokulimazeke. Ngoba isakhiwo salo siqukethe inani elikhulu lama-hydroxyl kanye namaqembu e-ethyl, linezinselelo ezithile ekuchitheni. Ukuze unciphise ngempumelelo i-ethyl cellulose, izindlela ezithile zokuchithwa kanye nezinto ezihlaseli zivame ukudingeka.
Ukukhetha kwe-solvent
I-solubility ye-ethyl cellulose incike esisindo sayo samangqamuzana, izinga lokuthembisa kanye ne-solvent ekhethiwe. Ngenxa yezimpawu zesakhiwo se-ethyl cellulose, ngokuvamile ingenakufakwa emanzini, kepha ingachithwa ezinhlobonhlobo zezinto eziphilayo ze-organic. I-solvents esetshenziswa kaningi ifaka:
I-Alcohol Solvents: Njenge-ethanol, i-isopropanol, i-N-Propanol, njll.
I-Ether Solvents: njenge-Dimethyl Sulfoxide (DMSO), Chloroform, njll., Ingancibilikisa kahle i-ethyl cellulose.
I-Ketone Sol: njenge-acetone, njll.
Ama-solvents ahlanganisiwe: anjenge-chloroform, i-carbon tetrachloride, njll., Nayo ingasetshenziswa njengezixazululo, kepha ukuphepha kufanele kubhekwe lapho kusetshenziswa.
Izinyathelo zokuchithwa
Izinyathelo zokuchithwa kwe-ethyl cellulose ngokuvamile zilandela:
Ukuchithwa kwangaphambili: Ngena ngokucophelela i-ethyl cellulose kwi-solvent ekhethiwe, qinisekisa ukuthi inani le-solvent lanele ukumboza i-ethyl cellulose, futhi ivuse ngobumnene ekushiseni kwegumbi ukuyisiza ukuhlakaza ngokulinganayo.
Ukushisa Ukuchithwa: Uma kunzima ukuncibilikisa emazingeni okushisa asekamelweni, izinga lokushisa lingakhuphuka ngokufanele (ngokuvamile hhayi ngaphezulu kwama-70 ° C) futhi lifudumele ngaphansi kokwenza i-ethyl cellulose ibe lula ukuncibilikisa.
Ukuqothula: Ngemuva kokuqedwa kokuchithwa, uma kukhona ama-bubble kwi-solvent, ama-bubble angavunyelwa ukubaleka ngokunciphisa ingcindezi noma ukumelela isikhathi esithile ukuze aqinisekise ukuqina kanye nokufana kwesisombululo sokugcina.
Ukuqapha ngesikhathi sokuchithwa
Ukulawulwa kokuhlushwa: Ukuhlushwa okuphezulu kakhulu kwe-ethyl cellulose kungadala ubunzima ekuqothulweni. Kunconywa ukuguqula i-solubility njengoba kudingeka.
Ukukhetha kwe-Solvent: Izinhlobo ezahlukahlukene ze-ethyl cellulose (ezinjengezinsimbi ze-molecular ezahlukahlukene, ama-degree ehlukene ama-teloudi) anezidingo ezihlukile ze-solces. Ukukhetha i-solvent efanelekile kusiza ukuthuthukisa ukusebenza kahle.
2. Ukusetshenziswa okuyinhloko kwe-ethyl cellulose
I-ethyl cellulose isetshenziswa kabanzi emikhakheni eminingi ngenxa yezakhiwo zayo ezinhle kakhulu zenyama nangamakhemikhali (njenge-solubity, izakhiwo ezakha amafilimu, ukuqina, njll.). Nazi ezinye zezinto eziphambili:
Isithwali sokukhishwa kwezidakamizwa esilawulwa izidakamizwa
I-Ethyl Cellulose inokuthambekela okuhle nokuqina kwe-biodegladability, futhi kuvame ukusetshenziswa njengesidakamizwa sokukhishwa kwezidakamizwa noma i-ejenti yokukhishwa okulawulwayo. Kungathuthukisa ukusebenza kwezidakamizwa futhi kunciphise imiphumela emibi ngokulawula ijubane kanye nesikhathi sokukhishwa kwezidakamizwa. Izicelo ezijwayelekile zifaka izidakamizwa zomlomo, iziqeshana zezidakamizwa zeTransdermal, njll.
I-Coatings nezinto zokwenziwa membrane
I-Ethyl Cellulose inezakhiwo ezinhle kakhulu zefilimu namandla emishini, ngakho-ke isetshenziswa kabanzi ekudleni kwezidakamizwa kanye nezidakamizwa. Kungakha ungqimba lwamafilimu omncane futhi ofanayo ukuvikela izinto zangaphakathi kusuka endaweni yangaphandle futhi kwandise ukuqina kanye nempilo yeshelufu yomkhiqizo. Izicelo ezijwayelekile ze-coating zifaka phakathi imodeli kashukela, ukuhlanganiswa kwezidakamizwa, njll.
Imboni yokudla
Embonini yokudla, i-ethyl cellulose isetshenziswa kabanzi njengesengezo sokudla. Ingasetshenziswa njengesikhulu, i-Stabilizer, eMulsifier, njll ukuthuthukisa ukuthungwa nokunambitheka kokudla. Isibonelo, i-ethyl cellulose ingasetshenziswa esikhundleni sokudla okunamakhalori aphansi okusiza ukulawula okuqukethwe kwamafutha noshukela.
Imboni yezimonyo
Ezimonyo, i-ethyl cellulose ivame ukusetshenziswa njenge-swerener, emulsifier nefilimu yangaphambili, engathuthukisa ukuvumelana, ukuqina nokuthinta kwe-emulsion lapho isetshenziswa. Isibonelo, i-ethyl cellulose ingatholakala kwimikhiqizo efana nokhilimu wobuso, izimo, kanye nezindebe.
Ukucutshungulwa kwephepha kanye nendwangu
Njengokutholwa kweselula yemvelo, i-ethyl cellulose idlala indima ebalulekile ekucutshungweni kwamaphepha nezindwangu. Ingakhuphula amandla ephepha, ithuthukise ikhwalithi ephezulu, futhi ithuthukise ukumelana kwebala kanye nokuphikiswa kokugoqwa kwezindwangu.
Ukumboza nopende
Njengefilimu yangaphambili ye-Coatings, i-ethyl cellulose nayo ivame ukusetshenziswa ekukhiqizweni kopende nezimbobo. Kungathuthukisa ukuqina, ukuqina kanye nokunamathela kwezimbozo, ngenkathi kuthuthukisa isicwebezelisi se-coating.
Izinto zokwakha imvelo
Ngenxa yokuwohloka kwayo kanye nobuthi obuphansi, i-ethyl cellulose nayo ifundelwe ukuthuthukiswa kwezinto zokwakha imvelo. Isibonelo, emikhakheni yokwelashwa kwamanzi kanye nokwenza ngcono kwenhlabathi, izici zokuvikela imvelo ze-ethyl cellulose zikwenza kube yinto eluhlaza enamandla amakhulu.
Njengezinto ezibalulekile zamakhemikhali, i-ethyl cellulose idlala indima ebalulekile ezimbonini eziningi. Indlela yayo yokuchithwa ikakhulukazi incike ekukhetheni izixazululo ze-organic, futhi izixazululo ezivamile zihlanganisa notshwala, izitha kanye nama-ketones. Ngokuya ngokusetshenziswa okuhlukile, i-ethyl cellulose ingasetshenziswa kabanzi ekukhishweni okulawulwa yimithi yezidakamizwa, imboni yokudla, ukukhiqiza izimonyo kanye neminye imikhakha, futhi ine-biodegradematability enhle kanye nobungane bemvelo. Ngesidingo esandayo sezinto zokwakha eziluhlaza nezemvelo, amathemba wesicelo se-ethyl cellullose abanzi kakhulu.
Isikhathi sePosi: Feb-20-2025