Hydroxypropylmethylcellulose (HPMC) bụ ihe sitere na cellulose nke a na-ejikarị eme ihe n'ọtụtụ ụlọ ọrụ, gụnyere ọgwụ, ihe owuwu na nri. Ọdịdị ya nwere ike ịdị iche dabere na ihe ndị dị ka ibu molekul ya, oke nnọchi ya, na ntinye nke ngwọta ya.
Okwu Mmalite maka Hydroxypropyl Methylcellulose (HPMC)
Hydroxypropyl methylcellulose bụ polima semi-synthetic nke a na-enweta site na mgbanwe kemịkalụ nke cellulose. N'ihi ihe pụrụ iche ya, a na-ejikarị ya eme ihe dị ka ihe na-eme ka ihe sie ike, ihe na-eme ka ihe dị nro, ihe na-eme ka ihe dị nro, ihe na-eme ka ihe dịgide na ihe na-eme ka ihe sie ike n'ọtụtụ ụzọ.
Nhazi na nhazi nke molekụla
HPMC nwere ọkpụkpụ azụ cellulose nwere ihe ndị na-anọchi hydroxypropyl na methoxy. Ogo nke nnọchi (DS) na-ezo aka na ọnụọgụ nkezi nke ihe ndị na-anọchi kwa nkeji anhydroglucose na yinye cellulose. Uru DS kpọmkwem na-emetụta ihe onwunwe anụ ahụ na kemịkalụ nke HPMC.
Ọdịiche HPMC
Viscosity bụ ihe dị mkpa maka HPMC, ọkachasị n'ihe gbasara ngwa ndị na-eji ihe ndị na-eme ka ọ sie ike ma na-eme ka ọ dị nro.
Ọtụtụ ihe na-emetụta viscosity nke ngwọta HPMC:
1. Ibu molekụla
Ibu molekul nke HPMC na-emetụta viscosity ya. N'ozuzu, HPMC dị arọ molekul dị elu na-emepụta ngwọta viscosity dị elu. E nwere ọkwa dị iche iche nke HPMC n'ahịa, nke ọ bụla nwere oke ibu molekul nke ya.
2. Ọkwa nnọchi (DS)
Ụkpụrụ DS nke otu hydroxypropyl na methoxy na-emetụta ike ịgbaze na viscosity nke HPMC. Ụkpụrụ DS dị elu na-emekarị ka mmiri gbaze na mmiri sie ike ma sie ike.
3. Ntinye uche
Ngụkọta nke HPMC dị na mmiri ọgwụ bụ isi ihe na-emetụta viscosity. Ka ngụkọta na-abawanye, viscosity na-abawanyekarị. A na-akọwakarị mmekọrịta a site na nha Krieger-Dougherty.
4. Okpomọkụ
Okpomọkụ na-emetụtakwa viscosity nke ngwọta HPMC. N'ozuzu, viscosity na-ebelata ka okpomọkụ na-arị elu.
Ebe ngwa
Ọgwụ: A na-ejikarị HPMC eme ihe n'ọgwụgwọ, gụnyere mbadamba na ngwọta anya, ebe mwepụta na viscosity dị oke mkpa.
Ọrụ Ụlọ: N'ime ụlọ ọrụ owuwu ụlọ, a na-eji HPMC eme ihe dị ka ihe na-eme ka ihe dị arọ na ngwaahịa ndị e ji simenti mee ka ọrụ ha dịkwuo mma ma na-echekwa mmiri.
Ụlọ Ọrụ Nri: A na-eji HPMC eme ihe dị ka ihe na-eme ka ihe sie ike, ihe na-eme ka ihe sie ike, na ihe na-eme ka ihe dị nro ma ...
Oke mmiri nke hydroxypropyl methylcellulose bụ ihe dị mgbagwoju anya nke ọtụtụ ihe dị ka ibu molekul, ogo nnọchi, ntinye uche na okpomọkụ metụtara. Ọkwa dị iche iche nke HPMC dị maka ojiji ụfọdụ, ndị nrụpụta na-enyekwa mpempe akwụkwọ data teknụzụ na-akọwapụta oke mmiri nke ọkwa ọ bụla n'okpuru ọnọdụ dị iche iche. Ndị nchọpụta na ndị na-emepụta ihe kwesịrị ịtụle ihe ndị a iji hazie njirimara nke HPMC ka ọ mezuo ihe achọrọ maka ngwa ha.
Oge ozi: Jenụwarị-20-2024