Umehluko Phakathi kwe-HPMC ne-HEC

Kokubili i-hydroxypropyl methylcellulose ne-hydroxyethyl cellulose kuyi-cellulose, yini umehluko phakathi kwakho kokubili?

"Umehluko Phakathi kwe-HPMC ne-HEC"

01 I-HPMC kanye ne-HEC
IHydroxypropyl methylcellulose (Hypromellose), eyaziwa nangokuthi i-hypromellose, iwuhlobo lwe-non-ionic cellulose exubile ether. I-semisynthetic, engasebenzi, i-viscoelastic polymer evame ukusetshenziswa njengesithambiso ku-ophthalmology, noma njengesamukeli noma imoto emithini yomlomo.
IHydroxyethyl cellulose (HEC), ifomula yamakhemikhali (C2H6O2)n, iyi-fibrous emhlophe noma ekhanyayo, engenaphunga, engenabuthi noma eyimpuphu eqinile eyakhiwe nge-alkaline cellulose ne-ethylene oxide (noma i-chloroethanol) Ilungiswa ngokufaka i-etherification futhi ingeye-non- i-ionic soluble cellulose ethers. Ngenxa yokuthi i-HEC inezakhiwo ezinhle zokuqina, ukumisa, ukuhlakaza, ukuhlanganisa, ukubopha, ukwenza ifilimu, ukuvikela umswakama nokuhlinzeka nge-colloid evikelayo, iye yasetshenziswa kabanzi ekuhloleni amafutha, ukumboza, ukwakhiwa, imithi nokudla, indwangu, iphepha kanye ne-polymerization. kanye nezinye izinkambu, izinga lokusefa elinezikhala ezingama-40 ≥ 99%.

02 umehluko
Nakuba kokubili kuyi-cellulose, kunomehluko omkhulu phakathi kwalokhu okubili:
I-Hydroxypropyl methylcellulose ne-hydroxyethylcellulose ziyehluka ngezakhiwo, ukusetshenziswa, kanye nokuncibilika.

1. Izici Ezihlukene
I-Hydroxypropyl methylcellulose: (i-HPMC) imhlophe noma ifayibha emhlophe efanayo noma impushana eyimpushana, eyingxenye yama-ether axubile e-nonionic cellulose. I-semi-synthetic engaphili i-viscoelastic polymer.
IHydroxyethylcellulose: (HEC) iyifayibha emhlophe noma ephuzi, engenaphunga futhi engenabuthi noma eqinile. I-etherified nge-alkaline cellulose ne-ethylene oxide (noma i-chlorohydrin). Kungokwe-non-ionic soluble cellulose ether.

2. Ukuncibilika okuhlukile
IHydroxypropyl methylcellulose: cishe ayincibiliki ku-ethanol, ether ne-acetone. Isixazululo se-colloidal esicacile noma esiguqubele kancane sincibilike emanzini abandayo.
I-Hydroxyethyl cellulose: Inezakhiwo zokujiya, ukumisa okwesikhashana, ukubopha, ukuhlanganisa, ukuhlakaza kanye nokuthambisa. Ingalungisa izixazululo kububanzi obuhlukahlukene be-viscosity futhi inokuncibilika okuhle kakhulu kukasawoti kuma-electrolyte.
I-Hydroxypropyl methylcellulose inezici zokukwazi ukujiya, ukumelana nosawoti omncane, ukuzinza kwe-pH, ukugcinwa kwamanzi, ukuzinza kwe-dimensional, izakhiwo ezinhle kakhulu zokwakha ifilimu, ukumelana okukhulu kwe-enzyme, ukuhlakazeka nokuhlangana.

Kunomehluko omningi phakathi kwalokhu okubili, futhi ukusetshenziswa kwazo embonini nakho kuhluke kakhulu.

IHydroxypropyl methylcellulose isetshenziswa kakhulu njenge-thickener, dispersant and stabilizer embonini yokumboza, futhi inokunyibilika okuhle emanzini noma kumakhemikhali aphilayo. Embonini yezokwakha, ingasetshenziswa kusimende, i-gypsum, i-latex putty, i-plaster, njll, ukuthuthukisa ukuhlakazeka kwesihlabathi sikasimende futhi kuthuthukise kakhulu ipulasitiki nokugcinwa kwamanzi odaka.
I-Hydroxyethyl cellulose inezici zokujiya, ukumisa, ukubopha, i-emulsifying, ukuhlakazeka kanye nokuthambisa. Ingalungisa izixazululo kububanzi obuhlukahlukene be-viscosity futhi inokuncibilika okuhle kakhulu kukasawoti kuma-electrolyte. I-Hydroxyethyl cellulose iyifilimu ephumelelayo yangaphambili, i-tackifier, i-thickener, i-stabilizer ne-disperant kuma-shampoos, izifutho zezinwele, ama-neutralizers, ama-conditioner kanye nezimonyo; ekugezeni izimpushana Phakathi kukhona uhlobo lwe-ejenti yokubuyisela kabusha ukungcola. I-Hydroxyethyl cellulose incibilika ngokushesha ekushiseni okuphezulu, okungasheshisa inqubo yokukhiqiza futhi kuthuthukise ukusebenza kahle kokukhiqiza. Isici esisobala sezinto zokuhlanza eziqukethe i-hydroxyethyl cellulose ukuthi zingathuthukisa ukushelela kanye ne-mercerization yezindwangu.