Kedu ihe bụ viscosity nke HPMC?

HPMC, ma ọ bụ Hydroxypropyl Methylcellulose, bụ polymer sịntetik nke a na-ejikarị eme ihe na ọgwụ, nri, ịchọ mma na ogige ihe owuwu. Ọ nwere ọtụtụ ihe ndị magburu onwe ya dị ka solubility, nkwụsi ike, nghọta na ihe ndị na-emepụta ihe nkiri dị ka ihe na-egbuke egbuke, nrapado, ihe nkiri mbụ, onye nkwụsịtụ na colloid nchebe.

Banyere viscosity nke HPMC, ọ bụ echiche dị mgbagwoju anya n'ihi na ọtụtụ ihe na-emetụta viscosity, dị ka itinye uche, ịdị arọ molecular, ihe mgbaze, okpomọkụ na ọnụ ọgụgụ isi.

Mmekọrịta dị n'etiti ịdị arọ molecular na viscosity: Arọ molekul nke HPMC bụ otu n'ime ihe ndị dị mkpa na-ekpebi viscosity ya. N'ikwu okwu n'ozuzu, ka ịdị arọ molekụla dị elu, ka viscosity nke HPMC na-adị elu. Ya mere, ndị na-emepụta ihe na-enyekarị ngwaahịa HPMC dị iche iche molekul iji gboo mkpa nke ụlọ ọrụ dị iche iche. A na-egosipụtakarị ịdị arọ molekụla dị ka uru K (dị ka K100, K200, wdg). Ka uru K buru ibu, ka viscosity dị elu.

Mmetụta nke itinye uche: Viscosity nke ngwọta HPMC na mmiri na-abawanye na mmụba nke itinye uche. Dịka ọmụmaatụ, ntinye 1% nke ngwọta HPMC nwere ike ịnwe viscosity ọtụtụ ugboro karịa nke ngwọta ntinye uche 0.5%. Nke a na-enye ohere ka a na-achịkwa viscosity nke ngwọta site n'ịgbanwe ntinye nke HPMC na ngwa ahụ.

Mmetụta nke mgbaze: HPMC nwere ike igbari na mmiri ma ọ bụ ihe mgbaze organic, mana ihe mgbaze dị iche iche na-emetụta viscosity ya. N'ozuzu, HPMC nwere ezigbo solubility na mmiri na ngwọta viscosity dị elu, mgbe viscosity na organic solvents dịgasị dabere na polarity nke ihe mgbaze na ogo nnọchi nke HPMC.

Mmetụta okpomọkụ: viscosity nke HPMC ngwọta na-agbanwe na okpomọkụ. N'ozuzu, viscosity nke HPMC ngwọta na-ebelata mgbe okpomọkụ na-abawanye. Nke a bụ n'ihi na mmụba nke okpomọkụ na-eduga na mmegharị ngwa ngwa ngwa ngwa na mmụba nke ngwọta nke ngwọta, nke na-ebelata viscosity.

Mmetụta nke ọnụ ọgụgụ shear: Ihe ngwọta HPMC bụ mmiri na-abụghị Newtonian, na viscosity ya na-agbanwe na ọnụ ọgụgụ shear. Nke a pụtara na mgbe a na-emegharị ma ọ bụ na-agbapụta, viscosity na-agbanwe na ike nke ọrụ ahụ. N'ozuzu, ihe ngwọta HPMC na-egosipụta àgwà mkparị nke shear, ya bụ, viscosity na-ebelata na ọnụ ọgụgụ dị elu.

Akara ule HPMC na nkọwapụta: Ọkwa dị iche iche nke ngwaahịa HPMC nwekwara nnukwu ọdịiche na viscosity. Dịka ọmụmaatụ, ngwaahịa HPMC dị ala viscosity nwere ike ịnwe viscosity nke 20-100 mPas na ntinye 2%, ebe ngwaahịa HPMC dị elu nwere ike ịnwe viscosity ruru 10,000-200,000 mPas n'otu ntinye uche. Ya mere, mgbe ị na-ahọrọ HPMC, ọ dị mkpa ịhọrọ ọkwa viscosity kwesịrị ekwesị dabere na ngwa achọrọ.

Ụzọ nnwale ọkọlọtọ: A na-atụkarị viscosity HPMC site na viscometer ma ọ bụ rheometer. Ụzọ ule a na-ahụkarị gụnyere viscometer ntụgharị na capillary viscometer. Ọnọdụ ule dị ka okpomọkụ, itinye uche, ụdị ihe mgbaze, wdg nwere ike inwe mmetụta dị ukwuu na nsonaazụ ya, ya mere, ọ dị mkpa ka a na-achịkwa ihe ndị a nke ọma n'oge ule.

The viscosity nke HPMC bụ a mgbagwoju oke emetụta otutu ihe, na ya adjustability na-eme ka ọtụtụ ebe na-eji dị iche iche ngwa. Ma na nri, ọgwụ, ihe owuwu ụlọ ma ọ bụ ihe ịchọ mma ụlọ ọrụ, ịghọta na ịchịkwa viscosity nke HPMC bụ otu n'ime isi ihe na-ahụ na ngwaahịa mma na arụmọrụ.