Hydroxypropyl methyl cellulose HPMC bụ a na-abụghị ionic cellulose ether mere si eke polymer ihe cellulose site a usoro nke chemical nhazi. Ha bụ ntụ ntụ ọcha na-enweghị isi, enweghị ụtọ na nke na-adịghị egbu egbu nke na-adaba n'ime ngwọta colloidal doro anya ma ọ bụ dịtụ turbid na mmiri oyi. Ọ nwere àgwà nke ndim, bonding, dispersion, emulsification, film e guzobere, nkwusioru, adsorption, gelation, elu ọrụ, mmiri njigide na-echebe colloid. Enwere ike iji Hydroxypropyl methylcellulose na ihe owuwu ụlọ, ụlọ ọrụ mkpuchi, resin sịntetik, ụlọ ọrụ seramiiki, ọgwụ, nri, akwa, ọrụ ugbo, ụlọ ọrụ kemịkalụ kwa ụbọchị na ụlọ ọrụ ndị ọzọ.
Ọrụ njide mmiri na ụkpụrụ: cellulose ether HPMC na-arụkarị ọrụ nke njide mmiri na ịgbanye na ngwa ngwa ciment na slurry dabere na gypsum, nke nwere ike imeziwanye ike njikọta na nguzogide sag nke slurry. Ihe ndị dị ka okpomọkụ ikuku, okpomọkụ na ọsọ ọsọ ikuku ga-emetụta ọnụ ọgụgụ mmiri na-agbanwe agbanwe na ciment mortar na ngwaahịa gypsum. Ya mere, na oge dị iche iche, e nwere ụfọdụ ọdịiche dị na njide mmiri nke otu ego nke ngwaahịa HPMC. N'ime ihe owuwu a kapịrị ọnụ, enwere ike gbanwee mmetụta njide mmiri nke slurry site na ịba ụba ma ọ bụ ibelata ego nke HPMC agbakwunyere.
Njide mmiri nke methyl cellulose ether n'okpuru ọnọdụ okpomọkụ dị elu bụ ihe dị mkpa na-egosi ọdịiche dị mma nke methyl cellulose ether. Ngwaahịa usoro HPMC mara mma nwere ike dozie nsogbu nke njide mmiri na oke okpomọkụ. N'oge okpomọkụ dị elu, karịsịa n'ebe ndị na-ekpo ọkụ ma na-ekpo ọkụ na ebe a na-emepụta ihe na-egbuke egbuke n'akụkụ anwụ na-acha, a chọrọ HPMC dị elu iji meziwanye njide mmiri nke slurry.
HPMC dị elu nwere otu ezigbo mma. A na-ekesa methoxy na hydroxypropoxy otu ya n'otu n'otu n'akụkụ eriri molekụla cellulose, nke nwere ike melite ikike ikuku oxygen na hydroxyl na ether bond iji jikọọ na mmiri iji mepụta njikọ hydrogen. , Ka mmiri na-enweghị onwe ya wee ghọọ mmiri a na-ekekọta, si otú ahụ na-achịkwa evaporation nke mmiri nke ọma site na ihu igwe dị elu na-eme ka mmiri dị elu, na-enwetakwa njigide mmiri dị elu.
Elu-edu cellulose HPMC nwere ike uniformly na n'ụzọ dị irè gbasasịa na ciment ngwa agha na gypsum dabeere na ngwaahịa, na kechie niile siri ike ahụ, na-etolite a oyi akwa nke wetting film. A na-eji nwayọọ nwayọọ hapụ mmiri dị n'ime ala ruo ogologo oge. Ihe eji eme ihe na-enweta mmeghachi omume hydration, iji hụ na ike njikọ na ike mkpakọ nke ihe ahụ. Ya mere, n'oge okpomọkụ na-ekpo ọkụ n'oge okpomọkụ, iji nweta mmetụta nke njide mmiri, a ghaghị ịgbakwunye ngwaahịa HPMC dị elu n'ụzọ zuru ezu dị ka usoro ahụ si dị, ma ọ bụghị ya, hydration na-ezughị ezu, ike na-ebelata, mgbawa, oghere na ịdaba. ga-eme n'ihi oke ihicha. Nsogbu, ma na-amụbakwa ihe isi ike nke ndị ọrụ ụlọ. Ka okpomọkụ na-ebelata, ọnụ ọgụgụ nke HPMC agbakwunyere nwere ike jiri nwayọọ nwayọọ belata, ma nwee ike nweta otu mmetụta njide mmiri.
Ihe ndị a na-emetụta njide mmiri nke HPMC:
1. Homogeneity nke cellulose ether HPMC
N'ime HPMC a na-emeghachi omume n'otu n'otu, a na-ekesa otu methoxy na hydroxypropoxy n'otu n'otu, na njide mmiri dị elu.
2. Thermal gel okpomọkụ nke cellulose ether HPMC
Thermal gel okpomọkụ dị elu, ọnụ ọgụgụ njide mmiri dị elu; N'ụzọ megidere nke ahụ, ọnụ ọgụgụ njide mmiri dị ala.
3. Viscosity nke cellulose ether HPMC
Mgbe viscosity nke HPMC na-abawanye, njigide mmiri na-abawanye; mgbe viscosity ruru ọkwa ụfọdụ, mmụba nke njide mmiri na-adịkarị ala.
4. Mgbakwunye nke cellulose ether HPMC
Ọnụ ọgụgụ dị ukwuu nke cellulose ether HPMC gbakwunyere, ọnụ ọgụgụ dị elu nke njide mmiri na-eme ka mmetụta njide mmiri dịkwuo mma. N'ihe dị iche iche nke 0.25-0.6% mgbakwunye, ọnụ ọgụgụ njide mmiri na-abawanye ngwa ngwa na mmụba nke ego mgbakwunye; mgbe ego mgbakwunye na-abawanye, mmụba na-arịwanye elu nke njide mmiri na-ebelata.
Oge nzipu: Dec-16-2021