Hydroxypropyl methylcellulose (HPMC) bụ cellulose ether nke na-abụghị ionic nke e ji cellulose ihe polymer eke mee site na usoro 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 nke nwere obere igwe ojii na mmiri oyi. Ọ nwere ihe na-eme ka ọ sie ike, na-ejikọ, na-agbasa, na-eme ka ihe dị nro, na-akpụ ihe nkiri, na-egbochi, na-amịkọrọ ihe, na-eme ka ọ dị nro ...echekwa mmiri ma na-echebe ya. Enwere ike iji Hydroxypropyl methyl cellulose na methyl cellulose mee ihe n'ihe owuwu ụlọ, ụlọ ọrụ agba, resin sịntetik, ụlọ ọrụ seramiiki, ọgwụ, nri, ákwà
Mmetụta njigide mmiri na ụkpụrụ nke hydroxypropyl methylcellulose HPMC
Cellulose ether HPMC na-arụ ọrụ nke idobe mmiri na ime ka ọ sie ike na simenti na slurry dabere na gypsum, ọ nwekwara ike ime ka ike njikọ na iguzogide sag nke slurry ahụ ka mma nke ọma.
Ihe ndị dị ka okpomọkụ ikuku, okpomọkụ na ọsọ nrụgide ifufe ga-emetụta ọnụego mgbanwe mmiri na simenti na ngwaahịa dabere na gypsum. Ya mere, n'oge dị iche iche, enwere ụfọdụ ọdịiche na mmetụta njigide mmiri nke ngwaahịa nwere otu ọnụọgụ HPMC agbakwunyere. N'ihe owuwu a kapịrị ọnụ, enwere ike ịgbanwe mmetụta njigide mmiri nke slurry site na ịbawanye ma ọ bụ ibelata ọnụọgụ HPMC agbakwunyere. Nchekwa 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 usoro HPMC dị mma nwere ike idozi nsogbu nke njigide mmiri nke ọma n'okpuru okpomọkụ dị elu. N'oge okpomọkụ dị elu, karịsịa n'ebe ọkụ na akọrọ na owuwu dị gịrịgịrị n'akụkụ anwụ na-acha, achọrọ HPMC dị elu iji melite njigide mmiri nke slurry. HPMC dị elu nwere ezigbo nha nha. A na-ekesa otu methoxy na hydroxypropoxy ya n'otu aka ahụ n'akụkụ yinye molekul cellulose, nke nwere ike imeziwanye ikike nke atọm oxygen na njikọ hydroxyl na ether iji jikọọ na mmiri iji mepụta njikọ hydrogen. , ka mmiri efu wee bụrụ mmiri e ji eriri kee, ka o wee chịkwaa uzu mmiri nke ihu igwe dị elu na-akpata, wee nweta oke mmiri.
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 ihe nkiri mmiri mmiri, mmiri dị na ntọala ahụ na-apụta nwayọ nwayọ ruo ogologo oge, gluu inorganic Mmeghachi omume mmiri nke ihe ahụ a chịkọtara ga-eme ka ike njikọ na ike nrụgide nke ihe ahụ sie ike. Ya mere, n'oge owuwu okpomọkụ dị elu, iji nweta mmetụta njide mmiri, ọ dị mkpa ịgbakwunye ngwaahịa HPMC dị elu n'ọtụtụ zuru oke dịka usoro si dị, ma ọ bụghị ya, a gaghị enwe mmiri zuru oke, ike belatara, mgbawa, oghere na mwụfu nke nsogbu nkụ oke kpatara, kamakwa ọ na-eme ka ihe isi ike owuwu nke ndị ọrụ dịkwuo elu. Ka okpomọkụ na-ebelata, enwere ike ibelata ọnụọgụ mmiri HPMC agbakwunyere nwayọ nwayọ, enwere ike nweta otu mmetụta njide mmiri ahụ.
Ihe ndị a na-emetụtakarị njide mmiri nke ngwaahịa hydroxypropyl methylcellulose HPMC n'onwe ya:
A na-ekesa HPMC, methoxyl na hydroxypropoxyl nke e mere mmeghachi omume n'otu n'otu, ọnụego njigide mmiri dịkwa elu;
Okpomọkụ jel okpomọkụ nke Cellulose ether HPMC dị elu, ọnụego nchekwa mmiri dị elu; ma ọ bụghị ya, ọnụego nchekwa mmiri dị ala;
Mgbe viscosity nke cellulose ether HPMC na-abawanye, ọ̀tụ̀tụ̀ njide mmiri na-abawanye; mgbe viscosity ruru ọkwa ụfọdụ, mmụba nke ọ̀tụ̀tụ̀ njide mmiri na-adịkarị nwayọọ;
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: Jun-01-2023