N'ime ite a gwakọtara agwakọta, obere ihe ether cellulose nwere ike ime ka arụmọrụ nke ite mmiri dịkwuo mma nke ukwuu. A pụrụ ịhụ na cellulose ether bụ ihe mgbakwunye dị mkpa nke na-emetụta arụmọrụ owuwu nke ite. Ịhọrọ ether cellulose nke ụdị dị iche iche, viscosity dị iche iche, nha ihe dị iche iche, ogo viscosity dị iche iche na ọnụọgụ agbakwunyere nwekwara mmetụta dị iche iche na imeziwanye arụmọrụ nke ite akọrọ. Ugbu a, ọtụtụ ite na ite nwere ihe eji ejide mmiri adịghị mma. Mmiri ahụ ga-ekewapụ mgbe ọ hapụsịrị ya ruo nkeji ole na ole. Ya mere, ọ dị oke mkpa itinye cellulose ether na ite simenti. Ka anyị leba anya nke ọma n'ọrụ nke cellulose ether na ite simenti!
1.Njide mmiri Cellulose ether
Mmiri dị mkpa maka cellulose ether, ọ bụkwa ihe onwunwe nke ọtụtụ ndị na-emepụta ngwa agha akọrọ n'ime ụlọ, ọkachasị ndị nọ na mpaghara ndịda nwere oke okpomọkụ, na-elebara anya na ya. N'imepụta ihe owuwu ụlọ, karịsịa ngwa agha akọrọ, cellulose ether na-arụ ọrụ a na-apụghị ịgbanwe agbanwe, karịsịa n'imepụta ngwa agha pụrụ iche (ngwa agha agbanwere agbanwe), ọ bụ ihe dị mkpa ma dị mkpa.
Ọbara mmiri, oke mmiri, okpomọkụ gburugburu na nhazi molekul nke cellulose ether nwere nnukwu mmetụta na arụmọrụ nchekwa mmiri ya. N'otu ọnọdụ ahụ, ka viscosity nke cellulose ether na-akawanye mma, otú ahụ ka nchekwa mmiri ka mma; ka dose ahụ na-aka elu, otú ahụ ka nchekwa mmiri ka mma. Ọtụtụ mgbe, obere cellulose ether nwere ike ime ka ọnụego nchekwa mmiri nke mortar ka mma. Mgbe dose ahụ ruru ọkwa ụfọdụ, usoro nke ịbawanye ọnụego nchekwa mmiri na-ebelata; nchekwa mmiri nke cellulose ether na-ebelatakarị ka okpomọkụ gburugburu na-abawanye, mana ụfọdụ cellulose ethers emezigharịrị nwekwara ezigbo nchekwa mmiri n'okpuru ọnọdụ okpomọkụ dị elu; cellulose ethers nwere obere ọkwa nnọchi nwere arụmọrụ nchekwa mmiri ka mma.
Otu hydroxyl dị na molekul ether cellulose na atọm oxygen dị na njikọ ether ga-emepụta njikọ hydrogen na molekul mmiri, na-agbanwe mmiri efu ka ọ bụrụ mmiri ejikọtara, si otú a na-arụ ọrụ dị mma na njigide mmiri; mgbasa nkekọ dị n'etiti molekul mmiri na agbụ molekul cellulose ether na-enye molekul mmiri ohere ịbanye n'ime cellulose ether macromolecular yinye ma nwee ike ịnọ n'okpuru mgbochi siri ike, si otú a na-emepụta mmiri efu na mmiri ejikọtara, si otú a na-eme ka njigide mmiri nke simenti dịkwuo mma; cellulose ether na-eme ka ihe onwunwe rheological ka mma, nhazi netwọk oghere na nrụgide osmotic nke simenti ọhụrụ slurry, ma ọ bụ ihe ndị na-emepụta ihe nkiri nke cellulose ether na-egbochi mgbasa nke mmiri.
2.Mmebi nke cellulose ether na thixotropy
Cellulose ether na-enye moto mmiri ahụ ezigbo viscosity, nke nwere ike ime ka ikike njikọ dị n'etiti moto mmiri na oyi akwa ntọala dịkwuo elu, ma melite arụmọrụ mgbochi sag nke moto ahụ. A na-ejikarị ya eme ihe n'ọtụtụ ebe na moto plastering, moto njikọ taịlị na sistemụ mkpuchi mgbidi mpụta. Mmetụta siri ike nke cellulose ether nwekwara ike ime ka iguzogide mgbasa na ịdị n'otu nke ihe ọhụrụ dịkwuo elu, gbochie mmebi ihe, nkewa na ọbara ọgbụgba, a pụkwara iji ya na simenti eriri, simenti mmiri na simenti na-akpakọ onwe ya.
Mmetụta siri ike nke cellulose ether na ihe ndị e ji simenti mee na-esi na viscosity nke ihe ngwọta cellulose ether. N'otu ọnọdụ ahụ, ka viscosity nke cellulose ether na-abawanye, otú ahụ ka viscosity nke ihe e ji simenti emeziwanye si ka mma. Agbanyeghị, ọ bụrụ na viscosity dị oke elu, ọ ga-emetụta mmiri na ọrụ nke ihe ahụ (dịka ịrapara na mma plaster). Mkpụrụ osisi na-eme ka ihe dị n'otu na simenti na-akpakọ onwe ya nke chọrọ mmiri dị elu chọrọ obere viscosity nke cellulose ether. Na mgbakwunye, mmetụta siri ike nke cellulose ethers na-eme ka mkpa mmiri nke ihe ndị e ji simenti mee dịkwuo elu ma na-eme ka mmepụta simenti dịkwuo elu.
Mmiri mmiri cellulose ether cellulose nwere nnukwu thixotropy, nke bụkwa ihe dị mkpa na cellulose ether. Mmiri mmiri nke methylcellulose na-enwekarị pseudoplastic, nke na-abụghị thixotropic n'okpuru okpomọkụ gel ha, mana ha na-egosipụta ihe ndị Newtonian na-asọ asọ na obere nha. Pseudoplasticity na-abawanye ka mmụba nke ibu molekul ma ọ bụ mkpokọta nke cellulose ether, n'agbanyeghị ụdị na ogo nke nnọchi nke ihe nnọchi ahụ. Ya mere, cellulose ethers nke otu ọkwa viscosity, ma MC, HPMC, ma ọ bụ HEMC, ga-egosipụta otu ihe ndị ahụ ma ọ bụrụhaala na a na-edebe ntinye na okpomọkụ. Mgbe okpomọkụ ahụ mụbara, a na-emepụta gel nhazi ma na-eme nnukwu mmiri thixotropic.
Oke mkpokọta na obere viscosity cellulose ethers na-egosipụta thixotropy ọbụlagodi n'okpuru okpomọkụ gel. Ihe onwunwe a bara uru nke ukwuu n'ịhazi ihe ndị na-eme ka ụlọ sie ike ma na-ada ada n'oge owuwu. E kwesịrị ịmara ebe a na ka viscosity nke cellulose ether dị elu, otú ahụ ka njide mmiri ka mma, mana ka viscosity dị elu, otú ahụ ka molekul dị arọ nke cellulose ether dị elu, na ike ịgbaze ya na-ebelata nke ọma, nke nwere mmetụta ọjọọ na ntinye moto na arụmọrụ owuwu.
3.Mmetụta ntinye cellulose ether-air
Cellulose ether nwere mmetụta dị ukwuu n'ikuku n'ihe ndị e ji simenti ọhụrụ mee. Cellulose ether nwere ma otu hydrophilic (òtù hydroxyl, otu ether) na otu hydrophobic (òtù methyl, mgbanaka glucose). Ọ bụ surfactant nwere ọrụ elu ma si otú a nwee mmetụta ntinye ikuku. Mmetụta ntinye ikuku nke cellulose ether ga-emepụta mmetụta "bọọlụ", nke nwere ike imeziwanye arụmọrụ ọrụ nke ihe ndị a gwakọtara ọhụrụ, dị ka ịbawanye ike na ịdị ire ụtọ nke ngwa agha n'oge ọrụ, nke bara uru na nhazi nke ngwa agha; ọ ga-emekwa ka mmepụta nke ngwa agha dịkwuo elu ma belata ọnụ ahịa mmepụta nke ngwa agha; mana ọ ga-eme ka porosity nke ihe ndị siri ike dịkwuo elu ma belata ihe onwunwe igwe ha dị ka ike na modulus na-agbanwe agbanwe.
Dịka ihe na-eme ka mmiri dị n'ime mmiri, cellulose ether nwekwara mmetụta mmiri mmiri ma ọ bụ mmanụ n'ahụ ihe ndị e ji simenti mee, nke ya na mmetụta ikuku ya na-eme ka mmiri dị n'ime ihe ndị e ji simenti mee ka mmiri dị n'ime mmiri, mana mmetụta ya na-eme ka mmiri dị n'ime mmiri ga-ebelata. Mmetụta nke cellulose ether na mmiri dị n'ime ihe ndị e ji simenti mee bụ njikọta nke ikesa plastik na mmetụta ikesa. N'ikwu ya n'ozuzu, mgbe dose cellulose ether dị obere nke ukwuu, ọ na-apụtakarị dị ka ikesa plastik ma ọ bụ mbelata mmiri; mgbe dose ahụ dị elu, mmetụta ikesa cellulose ether na-abawanye ngwa ngwa, mmetụta ikesa ikuku ya na-emekwa ka afọ ju, ya mere ọ na-apụta dị ka ikesa ihe ma ọ bụ mmụba nke mkpa mmiri.
4.Mmetụta Cellulose ether-retarding
Cellulose ether ga-agbatị oge ntọala nke simenti ma ọ bụ simenti ma mee ka usoro mmiri simenti ghara ịdị ogologo, nke bara uru ime ka oge ọrụ nke ihe ngwakọta ọhụrụ dịkwuo elu ma melite mfu nke nguzozi simenti na mbelata simenti dabere na oge, mana ọ nwekwara ike igbu oge ọganihu owuwu ahụ.
Oge ozi: Sep-24-2024