Yintoni umahluko phakathi kwe-hydroxyethyl cellulose kunye ne-hydroxypropyl cellulose?

I-Hydroxyethylcellulose (HEC) kunye ne-hydroxypropylcellulose (HPC) zombini ziphuma kwi-cellulose, i-polymer yendalo efumaneka kwiindonga zeeseli zezityalo. Ezi zinto ziphuma kwi-cellulose zisetyenziswa ngokubanzi kumashishini ahlukeneyo ngenxa yeempawu zabo ezizodwa.

Ubume bekhemikhali:

I-Hydroxyethylcellulose (HEC):

I-HEC yenziwe ngokuphendula i-cellulose nge-ethylene oxide.
Kwisakhiwo samakhemikhali se-HEC, amaqela e-hydroxyethyl angeniswa kwi-backbone ye-cellulose.
Iqondo lokuthatha indawo (DS) limele umndilili wenani lamaqela e-hydroxyethyl ngeyunithi yeglucose kwikhonkco leselulosi.

IHydroxypropylcellulose (HPC):

I-HPC iveliswa ngokunyanga i-cellulose ngepropylene oxide.
Ngethuba lenkqubo yokudibanisa, amaqela e-hydroxypropyl ongezwa kwisakhiwo se-cellulose.
Ngokufana ne-HEC, iqondo lokutshintshwa lisetyenziselwa ukulinganisa ubungakanani bokutshintshwa kwe-hydroxypropyl kwi-molecule ye-cellulose.

uphawu:

I-Hydroxyethylcellulose (HEC):

I-HEC yaziwa ngobuchule bayo bokugcina amanzi obugqwesileyo, nto leyo eyenza ukuba ibe sisithako esiqhelekileyo kwiintlobo ezahlukeneyo zokuxina kunye ne-gelling applications.
Yenza isisombululo esicacileyo emanzini kwaye ibonisa ukuziphatha kwe-pseudoplastic, oku kuthetha ukuba iyancipha i-viscous phantsi koxinzelelo lwe-shear.
I-HEC isetyenziswa ngokuqhelekileyo ekuqulunqweni kweemveliso zokunyamekela komntu, amayeza, kunye ne-thickener kwiingubo ezisekelwe emanzini.

IHydroxypropylcellulose (HPC):

I-HPC nayo inonyibiliko oluhle lwamanzi kunye neempawu zokwenza ifilim.
Inoluhlu olubanzi lokuhambelana nezinyibilikisi ezahlukeneyo kune-HEC.
I-HPC isetyenziswa rhoqo njenge-binder ekuqulunqweni kwamachiza, iimveliso zokunakekelwa komlomo, kunye nokuveliswa kwethebhulethi.

isicelo:

I-Hydroxyethylcellulose (HEC):

Isetyenziswa ngokubanzi kwimizi mveliso yokuthambisa kunye nokhathalelo lomntu njengento etyebisayo kwiishampu, iiloshini kunye neekhrimu.
Isetyenziswe njenge-stabilizer kunye ne-viscosity regulator ekuqulunqweni kwamachiza.
Isetyenziswe kwimveliso yeepeyinti ezisekelwe emanzini kunye neengubo.

IHydroxypropylcellulose (HPC):

Idla ngokusetyenziswa kwizicelo zamayeza, ngakumbi njengesibophelelo xa kusenziwa iipilisi.
Isetyenziswa kwiimveliso zokhathalelo lomlomo ezifana nentlama yamazinyo ngenxa yokuqina kwayo.
Ingasetyenziswa kwiinkqubo zokuhanjiswa kweziyobisi ezilawulwayo.

Ngelixa i-hydroxyethyl cellulose (HEC) kunye ne-hydroxypropyl cellulose (HPC) yabelana ngezinto ezifanayo ngenxa yemvelaphi yazo ye-cellulose, ziyahluka kwisakhiwo samachiza, iipropati kunye nokusetyenziswa. I-HEC idla ngokuthandwa kukhathalelo lomntu kunye nokwakheka kweengubo zokugcina amanzi kunye nokuqina kwamandla, ngelixa i-HPC isetyenziswa ngokubanzi kwishishini lamachiza, ngokukodwa kwi-tablet yokuvelisa kunye neenkqubo zokuhanjiswa kweziyobisi ezilawulwayo. Ukuqonda lo mahluko kubalulekile ekukhetheni izinto eziphuma kwiselulosi ezifanelekileyo kusetyenziso oluthile lwemizi-mveliso.