Hydroxypropyl methyl cellulose HPMC bụ cellulose ether nke na-abụghị ionic nke e ji ihe polymer eme site na usoro nhazi kemịkalụ. Ha bụ ntụ ọcha na-enweghị isi, enweghị uto na-adịghị egbu egbu nke na-agbaba ghọọ mmiri colloidal doro anya ma ọ bụ ntakịrị turbid na mmiri oyi. O nwere njirimara nke ịka nká, njikọ, mgbasa, emulsification, nhazi ihe nkiri, nkwụsịtụ, adsorption, gelation, ọrụ elu, njigide mmiri na colloid nchebe. Enwere ike iji Hydroxypropyl methylcellulose mee ihe na ihe owuwu ụlọ, ụlọ ọrụ mkpuchi, resin sịntetik, ụlọ ọrụ seramiiki, ọgwụ, nri, ákwà, ọrụ ugbo, ụlọ ọrụ kemịkalụ kwa ụbọchị na ụlọ ọrụ ndị ọzọ.
Ọrụ na ụkpụrụ nke idobe mmiri: cellulose ether HPMC na-arụ ọrụ nke idobe mmiri na ime ka ọ sie ike na simenti na slurry dabere na gypsum, nke nwere ike ime ka ike njikọ na iguzogide sag nke slurry dịkwuo mma. Ihe ndị dị ka okpomọkụ ikuku, okpomọkụ na ọsọ nrụgide ifufe ga-emetụta ọnụego volatilization nke mmiri na simenti na ngwaahịa dabere na gypsum. Ya mere, n'oge dị iche iche, enwere ụfọdụ ọdịiche na mmetụta idobe mmiri nke otu ngwaahịa HPMC. N'ihe owuwu a kapịrị ọnụ, enwere ike ịgbanwe mmetụta idobe mmiri nke slurry site na ịbawanye ma ọ bụ ibelata ọnụọgụ HPMC agbakwunyere.
Njide mmiri nke methyl cellulose ether n'okpuru ọnọdụ okpomọkụ dị elu bụ ihe ngosi dị mkpa iji mata ịdị mma nke methyl cellulose ether. Ngwaahịa HPMC dị mma nwere ike idozi nsogbu nke idobe mmiri nke ọma n'oge okpomọkụ dị elu. N'oge okpomọkụ dị elu, karịsịa n'ebe ọkụ na akọrọ na owuwu dị gịrịgịrị n'akụkụ anwụ na-acha, a chọrọ HPMC dị elu iji melite idobe mmiri nke slurry.
HPMC dị elu nwere otu nha anya dị mma. A na-ekesa otu methoxy na hydroxypropoxy ya n'otu aka ahụ n'akụkụ yinye molekul cellulose, nke nwere ike ime ka ikike nke atọm oxygen dị na njikọ hydroxyl na ether dịkwuo mma ijikọta na mmiri iji mepụta njikọ hydrogen. , Ka mmiri efu wee bụrụ mmiri ejikọtara, si otú a na-achịkwa uzuoku nke mmiri nke ihu igwe dị elu na-akpata, ma na-enweta njide mmiri dị elu.
A pụrụ ịgbasa HPMC cellulose dị elu n'otu ụzọ ahụ na nke ọma na ngwaahịa simenti na gypsum, ma kechie ihe niile siri ike, wee mepụta oyi akwa nke ihe mkpuchi mmiri. A na-ahapụ mmiri dị na ntọala ahụ nwayọ nwayọ n'ime ogologo oge. Ihe a kpọkọtara na-enweta mmeghachi omume mmiri, iji hụ na ihe ahụ nwere ike ijikọ na ike nrụgide. Ya mere, n'oge okpomọkụ dị elu, iji nweta mmetụta nke njigide mmiri, a ga-agbakwunye ngwaahịa HPMC dị elu n'ọtụtụ zuru oke dịka usoro si dị, ma ọ bụghị ya, mmiri ezughi oke, ike belatara, mgbawa, oghere na ịda ada ga-eme n'ihi oke nkụ. Nsogbu, mana ọ na-emekwa ka ihe isi ike nke ndị ọrụ owuwu dịkwuo elu. Ka okpomọkụ na-ebelata, enwere ike ibelata ọnụọgụ HPMC agbakwunyere nwayọ nwayọ, enwere ike nweta otu mmetụta nchekwa mmiri ahụ.
Ihe ndị a na-emetụta njigide mmiri nke HPMC:
1. Nha nhata nke cellulose ether HPMC
N'ime HPMC nke e mere mmeghachi omume n'otu aka ahụ, a na-ekesa otu methoxy na hydroxypropoxy n'otu aka ahụ, ọnụego njigide mmiri dịkwa elu.
2. Okpomọkụ jel nke cellulose ether HPMC
Okpomọkụ gel dị elu, ọnụego nchekwa mmiri dị elu; kama nke ahụ, ọnụego nchekwa mmiri dị ala.
3. Viscosity nke cellulose ether HPMC
Mgbe viscosity nke HPMC mụbara, ọ̀tụ̀tụ̀ njide mmiri na-abawanye; mgbe viscosity ruru ọkwa ụfọdụ, mmụba nke ọ̀tụ̀tụ̀ njide mmiri na-adịkarị larịị.
4. Mgbakwunye nke cellulose ether HPMC
Ka ọnụọgụgụ cellulose ether HPMC agbakwunyere na-abawanye, otú ahụ ka ọnụego nchekwa mmiri na-abawanye ma na-eme ka mmetụta nchekwa mmiri ka mma. N'ime oke mgbakwunye 0.25-0.6%, ọnụego nchekwa mmiri na-abawanye ngwa ngwa ka mmụba nke ọnụọgụ mgbakwunye ahụ na-abawanye; mgbe ọnụọgụ mgbakwunye ahụ na-abawanye, mmụba nke ọnụego nchekwa mmiri na-ebelata.
Oge ozi: Disemba-16-2021