Kedu ihe dị iche n'etitihydroxypropyl methylcellulose(HPMC) nwere ma ọ bụ na-enweghị S?
1. A na-ekewa HPMC n'ime ụdị ozugbo na ụdị mgbasa ngwa ngwa
A na-agbakwụnye ụdị mgbasa ozi ngwa ngwa nke HPMC na mkpụrụedemede S. N'oge usoro mmepụta, a ga-agbakwunye glyoxal.
Ụdị HPMC ozugbo anaghị etinye mkpụrụedemede ọ bụla, dịka "100000" bụ "ụdị mgbasa ozi ngwa ngwa 100000 HPMC".
2. Ma ọ bụ na ọ bụghị S, njirimara ya dị iche
HPMC na-agbasa ngwa ngwa na-agbasa ngwa ngwa na mmiri oyi ma na-apụ n'anya n'ime mmiri. N'oge a, mmiri ahụ enweghị viscosity, n'ihi na HPMC na-agbasa naanị na mmiri, ọ dịghịkwa agbapụ n'ezie. Mgbe ihe dị ka nkeji abụọ gachara, viscosity nke mmiri ahụ na-abawanye nwayọ nwayọ, na-emepụta mmiri na-arapara achagharị. Colloid dị arọ.
HPMC ozugbo nwere ike ịgbasa ngwa ngwa n'ime mmiri ọkụ na ihe dị ka 70°C. Mgbe okpomọkụ dara ruo na okpomọkụ ụfọdụ, viscosity na-apụta nwayọ nwayọ ruo mgbe e guzobere viscous colloid doro anya.
3. Ma ọ bụrụ na S ma ọ bụ na-enweghị ya, ebumnuche ya dị iche.
A pụrụ iji HPMC ozugbo mee ihe naanị n'ime ntụ ntụ na ngwa agha putty. N'ime gluu mmiri mmiri, ihe mkpuchi na ihe nhicha, a ga-enwe nchikọta ma enweghị ike iji ya.
HPMC na-agbasa ngwa ngwa nwere ọtụtụ ojiji dị iche iche. Enwere ike iji ya na ntụ ntụ putty, ngwa agha, gluu mmiri mmiri, agba, na ihe eji asa ákwà na-enweghị ihe mgbochi ọ bụla.
Usoro mgbaze
1. Were mmiri ọkụ achọrọ, tinye ya n'ime akpa wee kpoo ya ọkụ ruo 80°C, wee jiri nwayọ tinye ngwaahịa a n'ime mmiri ahụ nwayọ nwayọ. Cellulose ahụ na-ese n'elu mmiri na mbụ, mana a na-agbasa ya nwayọ nwayọ iji mepụta otu slurry. Jụụ mmiri ahụ ka ọ na-akpali.
2. Ma ọ bụ kpoo 1/3 ma ọ bụ 2/3 nke mmiri ọkụ ahụ ruo n'okpomọkụ karịrị 85°C, tinye cellulose iji nweta mmiri ọkụ, wee tinye mmiri oyi fọdụrụnụ, na-akpali ya, ma mee ka ngwakọta ahụ dị jụụ.
3. Cellulose nwere ọnụọgụ mesh dị ntakịrị, ọ dịkwa ka obere ihe dị n'ime ntụ ntụ a gwakọtara agwakọta, ọ na-agbazekwa ngwa ngwa mgbe ọ zutere mmiri iji mepụta viscosity achọrọ.
4. Tinye cellulose nwayọ nwayọ na nke ọma n'ọnọdụ okpomọkụ ụlọ, ma nọgide na-akpali ya n'oge usoro mgbakwunye ahụ ruo mgbe e mepụtara ngwọta doro anya.
Kedụ ihe ndị na-emetụta njigide mmiri nke hydroxypropyl methylcellulose?
Ihe ndị a na-emetụtakarị njide mmiri nke ngwaahịa hydroxypropyl methylcellulose HPMC n'onwe ya:
1. Ọdịdị nke cellulose ether HPMC
HPMC nke nwere otu mmeghachi omume nwere nkesa otu nha nke methoxy na hydroxypropoxy otu na njigide mmiri dị elu.
2. Okpomọkụ jel okpomọkụ nke cellulose ether HPMC
Ka okpomọkụ jel okpomọkụ dị elu, otú ahụ ka ọnụego nchekwa mmiri dị elu; ma ọ bụghị ya, ọnụego nchekwa mmiri na-ebelata.
3. Cellulose ether HPMC viscosity
Mgbe viscosity nke HPMC mụbara, ọ̀tụ̀tụ̀ njide mmiri na-abawanye; mgbe viscosity ruru ọkwa ụfọdụ, mmụba nke ọ̀tụ̀tụ̀ ijide mmiri na-adịkarị nwayọ.
Ọnụọgụ mgbakwunye Cellulose ether HPMC
Ka ọnụọgụgụ cellulose ether HPMC agbakwunyere buru ibu, ka ọnụego njigide mmiri dị elu ma ka mmetụta njigide mmiri ka mma.
N'ime oke nke 0.25-0.6%, ọnụego njigide mmiri na-abawanye ngwa ngwa ka mmụba nke ọnụọgụ mgbakwunye ahụ na-abawanye; mgbe ọnụọgụ mgbakwunye ahụ na-abawanye, mmụba nke ọnụego njigide mmiri na-ebelata nwayọ.
Oge ozi: Ọktoba-17-2022