Kedu ka isi nke hydroxypropyl methylcellulose si emetụta àgwà ya?

Kedu mmetụta nke nha isi na hydroxypropyl methylcellulose:

Njikọ nkehydroxypropyl methylcellulose: Jiri lye gwọọ cellulose owu a nụchara anụcha na 35-40°C maka ọkara awa, pịa ya, gwerie cellulose ahụ, ma mee ka ọ dị mma na 35°C, ka nkezi ogo polymerization nke alkali enwetara dị n'ime eriri dị mkpa n'ime. Tinye eriri alkali n'ime ketulu etherification, tinye propylene oxide na methyl chloride n'usoro, ma etherify na 50-80°C ruo awa ise, nrụgide kachasị bụ ihe dị ka 1.8MPa. Tinyezie oke kwesịrị ekwesị nke hydrochloric acid na oxalic acid na mmiri ọkụ na 90°C iji saa ihe ahụ iji gbasaa olu ya. Mmiri gbazee na centrifuge. Saa ya na mmiri ruo mgbe ọ na-anọpụ iche. Mgbe mmiri dị n'ime ihe ahụ dị ala karịa 60%, kpoo ya na ikuku ọkụ na 130°C ruo mgbe mmiri dị n'ime ya dị ala karịa 5%.

HPMC nke usoro ihe mgbaze mepụtara na-eji toluene na isopropanol dị ka ihe mgbaze. Ọ bụrụ na ịsa ahụ adịghị mma, isi na-esi ísì ga-anọgide. Ugbu a, ụdị hydroxypropyl methylcellulose HPMC dị n'ime ụlọ na-agbanwe nke ukwuu, ọnụahịa ya na-agbanwekwa nke ukwuu, na-eme ka ọ siere ndị ahịa ike ime nhọrọ ziri ezi. Nke a bụ nsogbu nke usoro ịsa ahụ, ọ naghị emetụta ojiji ya ma enweghị nsogbu, HPMC dị ọcha ekwesịghị isi ammonia, starch na mmanya;HPMCỌ na-esikarị ụdị isi dị iche iche, ọ bụrụgodị na ọ naghị atọ ụtọ, ọ ga-adị arọ. Agbanyeghị, hydroxypropyl methylcellulose nke ọtụtụ ndị nrụpụta mepụtara nwere isi siri ike ma na-esi isi ike. N'ezie, àgwà ya erughị nke ọma.

A na-enweta Hypromellose site n'itinye owu a gwakọtara agwakọta na mmiri mmiri dị ụkọ iji nweta alkaline cellulose, wee tinye ihe mgbaze, ihe na-eme ka etherification rụọ ọrụ, toluene, na isopropanol maka mmeghachi omume etherification, ịsacha, ịkpọ nkụ, ịgwepịa, wdg iji nweta ngwaahịa emechara. Ọ dị mma, a ga-enwe isi, ka ndị ọrụ wee jiri ya mee ihe n'enweghị obi abụọ.