N'ime ngwa simenti na slurry dabeere na gypsum, hydroxypropyl methylcellulose na-arụkarị ọrụ nke njide mmiri na ịgbatị, ma nwee ike imeziwanye nrapado na 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 mmiri na-ejide mmiri nke ngwaahịa na otu ego nke hydroxypropyl methylcellulose agbakwunyere. 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 n'okpuru ọnọdụ okpomọkụ dị elu bụ ihe dị mkpa na-egosi ọdịiche dị mma nke hydroxypropyl methylcellulose ether.
Ngwaahịa usoro hydroxypropyl methylcellulose dị mma nwere ike dozie nsogbu nke njigide mmiri n'okpuru 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. , nke mere na mmiri n'efu na-aghọ mmiri a na-ekekọta, ka o wee nwee ike ịchịkwa evaporation nke mmiri na-akpata site na ihu igwe dị elu, ma nweta nnukwu njigide mmiri.
Hydroxypropyl methylcellulose dị elu nwere ike gbasasịa n'otu n'otu na ngwa ngwa ciment na ngwaahịa gypsum, wee kechie ihe niile siri ike, wee mepụta ihe nkiri wetting, a na-eji nwayọ wepụta mmiri dị na ntọala ahụ ogologo oge, yana mmeghachi omume hydration na gelling inorganic iji hụ na ike njikọta na ike mkpakọ nke ihe ahụ.
Ya mere, n'ime okpomọkụ okpomọkụ na-ewu ụlọ, iji nweta mmetụta njide mmiri, ọ dị mkpa ịgbakwunye ngwaahịa HPMC dị elu na oke zuru oke dịka usoro ahụ si dị, ma ọ bụghị ya, a ga-enwe hydration na-ezughị ezu, ike na-ebelata, mgbawa, oghere na ịwụfu n'ihi oke ihicha. nsogbu, ma na-abawanye ihe isi ike nke ndị ọrụ. Ka ọnọdụ okpomọkụ na-adaba, ọnụ ọgụgụ nke HPMC agbakwunyere nwere ike iji nwayọọ nwayọọ belata, ma nwee ike nweta otu mmetụta njide mmiri.
Oge nzipu: Eprel-13-2023