Isi Ihe Ndị Na-emetụta Nchekwa Mmiri nke HPMC

A na-ejikarị Hydroxypropylmethylcellulose (HPMC), dịka polima hydrophilic a na-ejikarị eme ihe n'ụlọ ọrụ ọgwụ, eme ihe n'ọtụtụ ebe na mkpuchi mbadamba, usoro mwepụta a na-achịkwa na sistemụ nnyefe ọgwụ ndị ọzọ. Otu n'ime ihe ndị bụ isi nke HPMC bụ ikike ya idobe mmiri, nke na-emetụta arụmọrụ ya dị ka ihe na-enye ọgwụ. N'isiokwu a, anyị ga-enyocha isi ihe ndị na-emetụta njigide mmiri nke HPMC, gụnyere ibu molekul, ụdị nnọchi, ntinye uche, na pH.

ibu molekụla

Ibu molekul nke HPMC na-arụ ọrụ dị oke mkpa n'ịchọpụta ikike idobe mmiri ya. N'ozuzu, ibu molekul dị elu nke HPMC na-eme ka mmiri dị ọcha karịa obere ibu molekul nke HPMC ma nwee ike ịmịkọrọ mmiri karịa. Nke a bụ n'ihi na ibu molekul dị elu nke HPMC nwere agbụ ndị dị ogologo nke nwere ike ịtinye ma mepụta netwọk sara mbara karị, na-amụba ọnụọgụ mmiri enwere ike ịmịkọrọ. Agbanyeghị, ekwesịrị ịmara na oke ibu molekul nke HPMC ga-akpata nsogbu dịka viscosity na nsogbu nhazi.

ụzọ ọzọ

Ihe ọzọ na-emetụta ikike nchekwa mmiri nke HPMC bụ ụdị nnọchi. HPMC na-abịa n'ụdị abụọ: hydroxypropyl-substituted na methoxy-substituted. Ụdị hydroxypropyl-substituted nwere ikike ịmịkọrọ mmiri karịa ụdị methoxy-substituted. Nke a bụ n'ihi na otu hydroxypropyl dị na molekul HPMC bụ hydrophilic ma na-eme ka mmekọrịta HPMC dịkwuo mma maka mmiri. N'ụzọ dị iche, ụdị methoxy-substituted adịghị hydrophilic ma ya mere o nwere obere ikike ijide mmiri. Ya mere, a ga-ahọrọ ụdị HPMC ndị ọzọ nke ọma dabere na njirimara achọrọ nke ngwaahịa ikpeazụ.

lekwasị anya na

Oke HPMC na-emetụtakwa ikike idobe mmiri ya. N'ebe dị ala, HPMC anaghị emepụta usoro dị ka gel, yabụ ikike idobe mmiri ya dị ala. Ka oke HPMC na-abawanye, molekul polymer malitere ịbanye, na-emepụta usoro dị ka gel. Netwọk gel a na-amịkọrọ ma na-ejigide mmiri, ikike idobe mmiri nke HPMC na-abawanye ka oke. Agbanyeghị, a ga-amarịrị na oke oke nke HPMC ga-ebute nsogbu nhazi dị ka viscosity na nsogbu nhazi. Ya mere, a ga-emeziwanye oke nke HPMC ejiri iji nweta ikike idobe mmiri achọrọ ma na-ezere nsogbu ndị a kpọtụrụ aha n'elu.

Uru PH

Uru pH nke gburugburu ebe a na-eji HPMC ga-emetụtakwa ikike idobe mmiri ya. Nhazi HPMC nwere otu anionic (-COO-) na otu hydrophilic ethylcellulose (-OH). Ionization nke -COO- groups dabere na pH, ọkwa ionization ha na-abawanye na pH. Ya mere, HPMC nwere ikike idobe mmiri dị elu na pH dị elu. Na obere pH, a na-eme ka otu -COO- group proton ma hydrophilicity ya na-ebelata, na-eme ka ikike idobe mmiri dị ala. Ya mere, a ga-emezi pH gburugburu ebe obibi iji nweta ikike idobe mmiri achọrọ nke HPMC.

na ngwụcha

Na mmechi, ikike nchekwa mmiri nke HPMC bụ isi ihe na-emetụta arụmọrụ ya dịka ihe na-enye ọgwụ. Isi ihe ndị na-emetụta ikike nchekwa mmiri nke HPMC gụnyere ibu molekul, ụdị nnọchi, ntinye uche na uru pH. Site na ịgbanwe ihe ndị a nke ọma, enwere ike ime ka ikike nchekwa mmiri nke HPMC dịkwuo mma iji nweta ihe ndị achọrọ na ngwaahịa ikpeazụ. Ndị nchọpụta ọgwụ na ndị nrụpụta kwesịrị ịṅa ntị nke ọma na ihe ndị a iji hụ na usoro ọgwụ dabere na HPMC dị mma na arụmọrụ kachasị elu.