Hydroxypropylmethylcellulose (HPMC) bụ mmepụta cellulose nke a na-ejikarị eme ihe na ụlọ ọrụ dị iche iche. Isi ojiji nke HPMC bụ dị ka thickeners, stabilizers na emulsifiers na nri, pharmaceutical na ịchọ mma ụlọ ọrụ. A na-ejikwa HPMC na mpaghara ihe owuwu dị ka ihe mgbakwunye ciment, dịka mkpuchi maka mbadamba nkume na capsules, yana ngwọta anya. Ihe bụ isi akụrụngwa nke HPMC bụ cellulose na kemịkalụ reagents.
Cellulose:
Cellulose bụ isi akụrụngwa maka mmepụta nke HPMC. Cellulose bụ polymer eke achọtara na mgbidi cell osisi na ọ bụ polima kachasị ukwuu n'ụwa. Njirimara kemịkalụ nke cellulose yiri HPMC, nke na-eme ka ọ bụrụ ezigbo akụrụngwa maka imepụta HPMC. A na-enweta cellulose site n'ụdị dị iche iche, gụnyere osisi, owu, na osisi dị iche iche.
Ebe kachasị esi enweta cellulose eji emeputa HPMC bụ osisi pulp. A na-enweta pulp osisi site na osisi dị nro dị ka spruce, pine na fir. A na-eji kemịkal na-agwọ pulp osisi iji mebie lignin na hemicellulose, na-ahapụ cellulose dị ọcha. A na-asachapụ cellulose dị ọcha wee saa ya ka ọ wepụ ihe adịghị ọcha ọ bụla.
Cellulose eji maka mmepụta HPMC ga-adị oke mma yana a ga-agbaso usoro nchịkwa siri ike iji hụ na cellulose dị ọcha. Ịdị ọcha nke cellulose dị oke egwu dịka adịghị ọcha nwere ike imetụta njirimara nke ngwaahịa ikpeazụ.
Chemical reagents:
Mmepụta nke HPMC chọrọ ka ojiji nke dị iche iche kemịkalụ reagents. Chemical reagents eji na mmepụta nke HPMC gụnyere propylene oxide, methyl chloride, sodium hydroxide, hydrochloric acid, wdg.
A na-eji propylene oxide mepụta hydroxypropyl cellulose (HPC), nke a na-emeghachi ya na methyl chloride iji mepụta HPMC. HPC na-emeghachi omume na methyl chloride iji dochie ụfọdụ otu hydroxyl na agbụ cellulose na methoxy na otu hydroxypropyl, si otú ahụ na-etolite HPMC.
A na-eji sodium hydroxide na mmepụta nke HPMC iji mee ka uru pH nke ngwọta mmeghachi omume na-enyere aka igbari cellulose.
N'oge usoro mmepụta HPMC, a na-eji hydrochloric acid dozie uru pH nke ngwọta mmeghachi omume.
Chemical reagents eji na HPMC mmepụta ga-abụ nke ịdị ọcha dị elu, a ga-ejikwa nlezianya chịkwaa ọnọdụ mmeghachi omume iji hụ na ịdị mma nke ngwaahịa ikpeazụ.
na ngwụcha:
Ihe bụ isi akụrụngwa nke HPMC bụ cellulose na kemịkalụ reagents. Cellulose, nke sitere na isi mmalite dị iche iche gụnyere osisi, owu, na osisi dị iche iche, bụ ihe bụ isi maka imepụta HPMC. Ihe reagents kemịkalụ eji na mmepụta HPMC gụnyere propylene oxide, methyl chloride, sodium hydroxide na hydrochloric acid. Mmepụta nke HPMC chọrọ usoro njikwa mma siri ike iji hụ na ịdị ọcha nke akụrụngwa na ịdị mma nke ngwaahịa ikpeazụ. A na-eji HPMC eme ihe n'ọtụtụ ụlọ ọrụ dị iche iche ma nwee ngwa dịgasị iche iche n'ihi njirimara pụrụ iche ya.
Oge nzipu: Sep-06-2023