Umahluko phakathi kwe-HPMC kunye ne-HEC

Zombini i-hydroxypropyl methylcellulose kunye ne-hydroxyethyl cellulose ziselulosi, yintoni umahluko phakathi kwezi zimbini?

"Umahluko phakathi kwe-HPMC kunye ne-HEC"

01 I-HPMC kunye ne-HEC
IHydroxypropyl methylcellulose (Hypromellose), ekwaziwa ngokuba yihypromellose, luhlobo lwe-non-ionic cellulose exutywe ne-ether. Yi-semisynthetic, engasebenzi, i-viscoelastic polymer edla ngokusetyenziswa njenge-lubricant kwi-ophthalmology, okanye njenge-excipient okanye isithuthi kumayeza omlomo.
I-Hydroxyethyl cellulose (HEC), i-chemical formula (C2H6O2)n, yintsika emhlophe okanye ekhaphukhaphu, engenavumba, engeyotyhefu okanye eyi powdery eqinileyo eyenziwe yialkaline cellulose kunye ne-ethylene oxide (okanye i-chloroethanol) Ilungiswa nge-etherification kwaye yeye-non- ionic cellulose ethers enyibilikayo. Ngenxa yokuba i-HEC ineempawu ezintle zokuqina, ukumisa, ukusabalalisa, i-emulsifying, i-bonding, ifilimu-ifom, ukukhusela umswakama kunye nokubonelela nge-colloid ekhuselayo, isetyenziswe ngokubanzi ekuhlolisweni kweoli, ukugubungela, ukwakhiwa, amayeza kunye nokutya, i-textile, iphepha kunye ne-polymerization. kunye namanye amasimi, i-40 mesh sieving rate ≥ 99%.

02 umahluko
Nangona zombini ziyi-cellulose, kukho umahluko omkhulu phakathi kwezi zimbini:
IHydroxypropyl methylcellulose kunye ne-hydroxyethylcellulose ziyahluka kwiipropati, ukusetyenziswa, kunye nokunyibilika.

1. Iimpawu ezahlukeneyo
I-Hydroxypropyl methylcellulose: (i-HPMC) imhlophe okanye i-fiber emhlophe efanayo okanye i-powder granular, eye-ethers eyahlukeneyo ye-cellulose edibeneyo ye-nonionic. Yi-semi-synthetic non-live viscoelastic polymer.
IHydroxyethylcellulose: (HEC) yifayibha emhlophe okanye etyheli, engenavumba nengenatyhefu okanye umgubo oqinileyo. I-etherified yi-alkaline cellulose kunye ne-ethylene oxide (okanye i-chlorohydrin). yeye-non-ionic soluble cellulose ether.

2. Ukunyibilika okwahlukileyo
IHydroxypropyl methylcellulose: phantse ayinyibiliki kwi-ethanol epheleleyo, i-ether kunye ne-acetone. Isisombululo se-colloidal esicacileyo okanye esinamafu kancinci sinyibilike kumanzi abandayo.
I-Hydroxyethyl cellulose: Ineempawu zokujiya, ukuxhoma, ukubopha, ukumilisela, ukusabalalisa kunye nokufumisa. Iyakwazi ukulungiselela izisombululo kwiindidi ezahlukeneyo ze-viscosity kwaye ine-solubility egqwesileyo yetyuwa ye-electrolytes.
I-Hydroxypropyl methylcellulose ineempawu zokukwazi ukuqina, ukuxhathisa ityuwa ephantsi, ukuzinza kwe-pH, ukugcinwa kwamanzi, ukuzinza kwe-dimensional, iipropati ezigqwesileyo zokwenza ifilimu, ukuchasana kwe-enzyme ebanzi, i-dispersibility kunye nokubambisana.

Kukho iiyantlukwano ezininzi phakathi kwezi zimbini, kwaye ukusetyenziswa kwazo kwishishini kwahluke kakhulu.

I-Hydroxypropyl methylcellulose isetyenziswa kakhulu njenge-thickener, dispersant kunye ne-stabilizer kwishishini lokugquma, kwaye inonyibiliko oluhle emanzini okanye kwi-solvents eziphilayo. Kwishishini lokwakha, linokusetyenziswa kwi-samente, i-gypsum, i-latex putty, i-plaster, njl., Ukuphucula ukuchithwa kwesanti yesanti kunye nokuphucula kakhulu iplastiki kunye nokugcinwa kwamanzi omdaka.
I-Hydroxyethyl cellulose ineempawu zokuqina, ukumisa, ukubopha, i-emulsifying, i-dispersing kunye ne-moisturizing. Iyakwazi ukulungiselela izisombululo kwiindidi ezahlukeneyo ze-viscosity kwaye ine-solubility egqwesileyo yetyuwa ye-electrolytes. I-Hydroxyethyl cellulose yifilimu esebenzayo yangaphambili, i-tackifier, i-thickener, i-stabilizer kunye ne-dispersant kwii-shampoos, izitshizi zeenwele, i-neutraizers, i-conditioners kunye ne-cosmetics; kwiipowders zokuhlamba Embindini luhlobo lwe-arhente yokubuyisela ukungcola. I-Hydroxyethyl cellulose ichitheka ngokukhawuleza kwiqondo lokushisa eliphezulu, elinokukhawuleza inkqubo yokuvelisa kunye nokuphucula ukusebenza kakuhle kwemveliso. Isici esicacileyo se-detergents equkethe i-hydroxyethyl cellulose kukuba inokuphucula ukugudiswa kunye ne-mercerization yamalaphu.