Uyini umehluko phakathi kwe-methylcellose ne-hydroxypropyll methylcellulose?

I-methylcellulose (MC) kanye ne-hydroxypropylll methylcellulose (HPMC) yizinto ezimbili ezivamile zokutholwa kwe-cellulose ezinomehluko obalulekile ohlelweni lwamakhemikhali kanye nezindawo zohlelo lokusebenza. Nakhu ukuqhathanisa okuningiliziwe kwazo:

1. Umehluko wesakhiwo samakhemikhali
Methylcellulose (MC):
I-Methylcellose iyi-cellulose derivative eyenziwe ngethula amaqembu we-methyl (-ch₃) kuma-molecule wemvelo we-cellulose. Amanye amaqembu we-hydroxyl (-OH) Ku-cellulose molecule athathelwa indawo amaqembu we-methyl (-Och₃) ukwakha i-methylcellulose. Imvamisa izinga le-methylation le-methylcellose licishe libe ngu-1.5 kuya ku-2.5 methyl amaqembu.

I-Hydroxypropyl methylcellulose (HPMC):
I-Hydroxypropyl Methylcellulose iyinhlangano etholwa yi-cellulose eqhubeka yethula amaqembu we-hydroxypropyl (-c₃hroh) ngesisekelo se-methylcellulose. Ukwethulwa kwamaqembu we-Hydroxypropyl kwenza i-HPMC ibe ne-soubity engcono nokusebenza okubanzi. Isakhiwo saso samakhemikhali siqukethe ukufakwa esikhundleni okubili, i-methylyproppylyl.

2. Umehluko nge-solubity
I-methylcellulose (MC) ine-solubility yamanzi eqinile, ikakhulukazi emanzini afudumele, ingakha isixazululo se-colloidal. Ukuzinikela kwayo kuncike ngezinga le-methylation. Lapho kukhuphuka izinga le-methylation, kungcono i-solubility yamanzi.

I-Hydroxypropyl Methylcellulose (HPMC) ine-solubility engcono ye-solubility kune-methylcellulose. Ngenxa yokwethulwa kwamaqembu ama-hydroxypropyl, i-HPMC ingabuye ichithe kahle emanzini abandayo. Uma kuqhathaniswa ne-methylcellulose, i-HPMC ine-soubity ebanzi, ikakhulukazi ingancibilikisa ngokushesha emazingeni okushisa aphansi.

3. Umehluko ezintweni ezibonakalayo
I-methylcellulose (MC) ivame ukuba sengathi ayinamibala kuya ku-powder emhlophe noma ama-granule, futhi ikhambi libonakale, line-emulsication enhle, ukuqina kanye nezakhiwo ze-gelling. Kwezinye izixazululo, i-methylcellulose ingakha ijeli eliqinile, kepha "ukuqhekeka kwejeli" kwenzeka lapho kufuthelwa.

I-Hydroxypropyl Methylcellulose (HPMC) inesixazululo esiphakeme sokuqonda kanye nokuqina okungcono okushisayo. Izisombululo ze-HPMC zivame ukuzinza ngaphezu kobubanzi obubanzi be-PH futhi ungalahli izakhiwo zabo zokugcina izinto lapho kufuthelwa njenge-MC, ngakho-ke isetshenziswa kabanzi emikhiqizweni ebucayi.

4. Izinkambu zohlelo lokusebenza
Ngenxa ye-solubity yabo eyingqayizivele nezakhiwo ezibonakalayo, i-methylcellose kanye ne-hydroxypropyll methylcellulose zisetshenziswa kabanzi emikhakheni ehlukene:

Methylcellulose (MC):
Njengomkhulu, i-emulsifier ne-stabilizer, isetshenziswa kabanzi embonini yokudla, izimonyo kanye nemithi yezemithi.
Ezintweni zokwakha, i-MC ivame ukusetshenziswa usimende, i-gypsum, ithambitho anamathela neminye imikhiqizo njenge-ejenti yokugcina amanzi kanye nesikhumuleli.
Iphinde isetshenziswe njengesengezo sezimbozo nama-inks.

I-Hydroxypropyl methylcellulose (HPMC):
Njengomkhulu, i-emulsifier ne-stabilizer, i-HPMC isetshenziswa kabanzi embonini yezemithi, ikakhulukazi ezidakamizweni zokukhishwa kwezidakamizwa.
Embonini yezokwakha, i-HPMC isetshenziswa embonweni odongeni, udaka owomile, ukunamathela okunamathela kanye neminye imikhiqizo ukuhlinzeka ngokunamathela okungcono nokuphikiswa kwamanzi.
Embonini yokudla, i-HPMC ivame ukusetshenziswa njengesikhulu, i-stabilizer, emulsifier, njll.
Ezimonyo, i-HPMC ingasetshenziswa njengozithoba, i-Gel yangaphambili, njll.

5. Ukuqina nokumelana nokushisa
I-methylcellulose (MC) iyazwela amazinga okushisa aphezulu. Ikakhulu lapho kufudunyezwa, ikhambi le-MC lingagxila futhi liphule, okuholela ekuzixazululeni ezingazinzile. Kuyancibilika kakhulu emanzini ashisayo, kepha kuncibilika kancane emanzini abandayo.

Uma kuqhathaniswa ne-MC, i-Hydroxypropyl Methylcellulose (HPMC) inokuqina okungcono kakhulu okushisayo kanye nokuqina kwe-PH ebanzi, futhi kungahlala zizinzile emazingeni okushisa aphezulu, ngakho-ke kusetshenziswa kabanzi kwimikhiqizo ezindaweni ezishisa kakhulu.

6 Intengo nemakethe
Ngenxa yenqubo eyinkimbinkimbi yokukhiqiza kanye nezindleko eziphakeme ze-HPMC, kuvame ukubiza kakhulu kune-methylcellulose. Kwezinye izinhlelo zokusebenza ezinezidingo eziphansi, i-methylcellulose ingahle ibe yikhethelo elingezelelwe, ngenkathi i-HPMC ivame kakhulu ezindaweni ezidinga ukusebenza okuphezulu, njengezinto zokwakha ezenziwa ngezemithi kanye nezinto zokwakha eziphezulu.

Yize zombili i-methylcellose (MC) neHydroxypropyll methylcellulose (HPMC) zithathwe kusuka ku-cellulose yemvelo futhi zinokusetshenziswa okufanayo emikhakheni eminingi, izinhlaka zazo zamakhemikhali, i-solubity, izakhiwo zemvelo kanye nezinkundla zohlelo lokusebenza zihlukile. I-HPMC isetshenziswa kabanzi emasimini amaningi (njengezimboni zezemithi, ukwakhiwa kanye nezimboni ze-cosmetics) ngenxa yokuqina kwayo okungcono nokuqina okushisayo, kanti i-MC isetshenziswa kakhulu kwezicelo ezithile ezibucayi.