Hydroxypropylmethylcellulose (HPMC) bụ polymer multifunctional ewepụtara na cellulose eke. A na-ejikarị ya na ụlọ ọrụ dị iche iche, gụnyere ọgwụ, nri, ihe owuwu na ihe ịchọ mma. Mmepụta nke HPMC na-agụnye ụdị akụrụngwa dị iche iche na usoro ọtụtụ nzọụkwụ.
Cellulose:
Isi mmalite: Isi akụrụngwa nke HPMC bụ cellulose, carbohydrate dị mgbagwoju anya dị na mgbidi cell osisi. Ebe kachasị esi enweta cellulose maka mmepụta HPMC bụ osisi pulp, mana enwere ike iji isi mmalite ndị ọzọ dịka akwa akwa akwa.
Nkwadebe: A na-agwọkarị cellulose iji wepụ ihe ndị na-adịghị ọcha wee hazie ya ka ọ bụrụ ụdị kwesịrị ekwesị maka mgbanwe ọzọ.
Ntọala:
Ụdị: Sodium hydroxide (NaOH) ma ọ bụ potassium hydroxide (KOH) na-ejikarị eme ihe dị ka ntọala n'oge mmalite nke mmepụta HPMC.
Ọrụ: A na-eji Alkali agwọ cellulose, na-eme ka ọ zaa ma mebie usoro ya. Usoro a, nke a na-akpọ alkalization, na-akwadebe cellulose maka mmeghachi omume ọzọ.
Ihe na-eme alkali:
Ihe nnọchite hydroxypropylating: A na-ejikarị propylene oxide ewebata otu hydroxypropyl n'ime ọkpụkpụ azụ cellulose. Nzọụkwụ a na-enye solubility na ihe ndị ọzọ achọrọ na cellulose.
Methylating agents: Methyl chloride ma ọ bụ dimethyl sulfate na-ejikarị ewebata otu methyl na nhazi cellulose, si otú ahụ na-eme ka njirimara ya dịkwuo elu.
Ihe nnọchi anya methylation:
Methanol: A na-ejikarị methanol eme ihe dị ka ihe mgbaze na reactant na usoro methylation. Ọ na-enyere aka iwebata otu methyl n'ime agbụ cellulose.
Ihe na-akpata hydroxypropylating:
Propylene oxide: Ọ bụ isi akụrụngwa maka iwebata otu hydroxypropyl n'ime cellulose. Mmeghachi omume n'etiti propylene oxide na cellulose na-eme n'okpuru ọnọdụ a na-achịkwa.
ihe mkpali:
Acid Catalyst: A na-eji ihe na-emepụta acid, dị ka sulfuric acid, iji kwalite mmeghachi omume etherification. Ha na-enyere aka ịchịkwa ọnụego mmeghachi omume na njirimara ngwaahịa.
Ihe mgbaze:
Mmiri: A na-ejikarị mmiri eme ihe dị ka ihe mgbaze na ọkwa dị iche iche nke usoro mmepụta. Ọ dị mkpa maka mgbaze reactants na ịkwalite mmeghachi omume n'etiti cellulose na ndị ọrụ etherifying.
Onye na-anọpụ iche:
Sodium hydroxide (NaOH) ma ọ bụ potassium hydroxide (KOH): a na-eji ewepụ ihe ndị na-akpata acid ma mezie pH n'oge njikọ.
sachaa:
Ihe enyemaka nzacha: Enwere ike iji ụdị ihe enyemaka dị iche iche wepụ ihe ndị na-adịghị ọcha na ihe ndị a na-achọghị na ngwakọta mmeghachi omume.
Ihe nchacha: Ịsacha mmiri ma ọ bụ ihe mgbaze ndị ọzọ na-enyere aka wepu kemịkalụ na adịghị ọcha na ngwaahịa ikpeazụ.
Onye na-apụ apụ:
Ikuku ma ọ bụ oven ihicha: Mgbe emechara ọcha, ngwaahịa a nwere ike ịbụ ikuku ma ọ bụ oven akpọnwụ iji wepụ ihe mgbaze na mmiri.
Ndị nnọchi anya njikwa mma:
Analytical Reagents: A na-eji reagents dị iche iche maka ebumnuche njikwa mma iji hụ na ngwaahịa HPMC na-ezute arụmọrụ na nkọwapụta achọrọ.
Mmepụta nke hydroxypropyl methylcellulose gụnyere imegharị cellulose site na usoro mmeghachi omume kemịkal. Akụrụngwa na-agụnye cellulose, alkali, etherifying agent, catalyst, ihe mgbaze, onye na-eme ka ọ ghara ịdị ọcha, onye na-eme ka ọ dị ọcha na desiccant, nke na-arụ ọrụ dị mkpa na nhazi usoro. Ọnọdụ ndị akọwapụtara na reagents ejiri nwere ike ịdịgasị iche dabere na akụrụngwa achọrọ yana ngwa nke ngwaahịa hydroxypropyl methylcellulose ikpeazụ.
Oge nzipu: Dec-21-2023