Ndị otu hydroxyl nacellulose etherụmụ irighiri ihe na ikuku oxygen na njikọ ether ga-eme ka njikọ hydrogen na mkpụrụ ndụ mmiri, na-atụgharị mmiri n'efu ka ọ bụrụ mmiri agbụ, si otú ahụ na-arụ ọrụ dị mma na njide mmiri; mgbasa ozi dị n'etiti mkpụrụ ndụ mmiri na cellulose ether molecular chains na-enye ohere ka mkpụrụ ndụ mmiri banye n'ime ime cellulose ether macromolecular chain ma bụrụ n'okpuru ihe mgbochi siri ike, si otú a na-emepụta mmiri n'efu na mmiri gbakọtara, nke na-eme ka njigide mmiri nke ciment slurry dịkwuo mma; cellulose ether mma rheological Njirimara, porous netwọk Ọdịdị na osmotic mgbali nke ọhụrụ ciment slurry ma ọ bụ ihe nkiri-akpụ Njirimara nke cellulose ether egbochi mgbasa nke mmiri.
Njide mmiri nke cellulose ether n'onwe ya sitere na solubility na akpịrị ịkpọ nkụ nke cellulose ether n'onwe ya. Ike hydration nke otu hydroxyl naanị ezughị iji kwụọ ụgwọ maka njikọ siri ike hydrogen na ndị agha van der Waals n'etiti ụmụ irighiri ihe, ya mere ọ na-aza naanị ma ọ naghị agbaze na mmiri. Mgbe a na-ewebata ihe ndị nọchiri anya n'ime agbụ molekụla, ọ bụghị naanị na ihe ndị na-anọchi anya na-emebi ụdọ hydrogen, kamakwa a na-ebibi njikọ interchain hydrogen n'ihi ịgbanye ihe ndị na-anọchi anya n'etiti ụdọ ndị dị n'akụkụ. Ka nnukwu ihe ndị nọchiri anya ya, ka ebe dị anya n'etiti ụmụ irighiri ihe, na mmetụta dị ukwuu nke ibibi njikọ nke hydrogen. Mgbe cellulose lattice gbasasịrị, ihe ngwọta na-abanye, na ether cellulose na-aghọ mmiri na-edozi mmiri, na-emepụta ngwọta dị elu nke viscosity, nke na-ekere òkè na njide mmiri.
Ihe na-emetụta arụmọrụ njide mmiri:
Viscosity: Nnukwu viscosity nke cellulose ether, ka mma na-ejigide mmiri na-arụ ọrụ, ma elu viscosity, na-elu ikwu molekụla arọ nke cellulose ether, na solubility ya na-ebelata otú ahụ, nke nwere mmetụta ọjọọ na ntinye uche na ịrụ ọrụ nke ngwa agha. N'ikwu okwu n'ozuzu, maka otu ngwaahịa ahụ, nsonaazụ viscosity tụrụ site na ụzọ dị iche iche dị nnọọ iche, ya mere mgbe ị na-atụnyere viscosity, a ghaghị ime ya n'etiti otu ụzọ ule (gụnyere okpomọkụ, rotor, wdg).
Ọnụ ego mgbakwunye: Ka ọnụ ọgụgụ nke cellulose ether agbakwunyere na ngwa agha ahụ, ka mma na-arụ ọrụ njide mmiri. Na-emekarị, obere ego nke cellulose ether nwere ike ime ka ọnụ ọgụgụ mmiri na-ejide mmiri dịkwuo mma. Mgbe ego ahụ ruru ọkwa ụfọdụ, usoro nke ịba ụba nke njide mmiri na-ebelata.
Urughiri mma: Nke kacha mma na irighiri ihe, mma njigide mmiri. Mgbe nnukwu akụkụ nke cellulose ether batara na mmiri, elu ahụ na-agbaze ozugbo wee mepụta gel iji kechie ihe ahụ iji gbochie ụmụ irighiri mmiri ka ọ nọgide na-abanye n'ime. Mgbe ụfọdụ, ọbụna ogologo oge ịkpali enweghị ike nweta edo dispersion na mgbasa, akpụ a turbid flocculent ngwọta ma ọ bụ agglomeration, nke ukwuu na-emetụta mmiri njigide nke cellulose ether. Solubility bụ otu n'ime ihe maka ịhọrọ cellulose ether. Ịdị mma bụkwa ihe ngosi arụmọrụ dị mkpa nke methyl cellulose ether. Ịdị mma na-emetụta solubility nke methyl cellulose ether. Coarser MC na-abụkarị granular na enwere ike ịgbaze ngwa ngwa n'ime mmiri na-enweghị agglomeration, mana ọnụego mgbasa na-adị ngwa ngwa ma ọ dịghị mma maka iji ngwa ngwa akọrọ.
Okpomọkụ: Ka ọnọdụ ihu igwe na-ebili, njide mmiri nke cellulose ethers na-ebelatakarị, ma ụfọdụ cellulose ethers gbanwetụrụ nwekwara ezigbo njigide mmiri n'okpuru ọnọdụ okpomọkụ dị elu; mgbe okpomọkụ na-ebili, hydration nke polymers na-ada mbà, a na-achụpụkwa mmiri n'etiti agbụ. Mgbe akpịrị ịkpọ nkụ zuru ezu, ụmụ irighiri ihe ndị ahụ na-amalite ịgbakọta iji mepụta gel nhazi netwọk nwere akụkụ atọ.
Ọdịdị molekụla: Cellulose ethers nwere obere ngbanwe nwere njide mmiri ka mma.
Thicking na thixotropy
Na-agbakọ:
Mmetụta na ike njikọ na arụmọrụ mgbochi-sagging: Cellulose ethers na-enye mmiri mmiri mmiri viscosity magburu onwe ya, nke nwere ike ịbawanye ike nke ngwa agha mmiri na ala oyi akwa ma melite arụmọrụ mgbochi nke ngwa agha. A na-eji ya eme ihe na plasta ngwa agha, ngwa agha tile bonding na sistem mkpuchi mgbidi dịpụrụ adịpụ 3.
Mmetụta na homogeneity ihe: The ndim mmetụta nke cellulose ethers nwekwara ike dịkwuo mgbochi mgbasa ikike na homogeneity nke freshly agwakọta ihe, gbochie ihe stratification, segregation na mmiri seepage, na ike ga-eji na eriri ihe, n'okpuru mmiri ihe na onwe-compacting ihe.
Isi mmalite na mmetụta nke mmetụta na-akpụ akpụ: Mmetụta siri ike nke cellulose ether na ihe ndị dabeere na ciment sitere na viscosity nke cellulose ether ngwọta. N'okpuru otu ọnọdụ ahụ, elu viscosity nke cellulose ether, mma viscosity nke gbanwetụrụ ihe dabeere ciment, ma ọ bụrụ na viscosity dị oke elu, ọ ga-emetụta ndị fluidity na operability nke ihe onwunwe (dị ka ịrapagidesi ike na plasta mma). Ngwa agha na-ebuli onwe ya na kọmpat compacting nke nwere oke mmiri chọrọ chọrọ viscosity dị ala nke ether cellulose. Tụkwasị na nke ahụ, mmetụta dị nro nke cellulose ether ga-eme ka mmiri na-achọ ihe ndị dabeere na ciment ma mee ka mmepụta nke ngwa agha dịkwuo elu.
Thixotropy:
Ihe ngwọta dị elu nke cellulose ether aqueous nwere nnukwu thixotropy, nke bụkwa isi njirimara cellulose ether. Ngwọta mmiri nke methyl cellulose na-enwekarị pseudoplasticity na mmiri na-abụghị thixotropic n'okpuru ọnọdụ gel ya, ma na-egosipụta ihe ndị na-asọpụta Newtonian na ọnụ ọgụgụ dị ala. Pseudoplasticity na-abawanye site na mmụba nke cellulose ether molecular arọ ma ọ bụ itinye uche, ọ nweghịkwa ihe jikọrọ ya na ụdị nnọchi na ogo nke nnọchi. Ya mere, cellulose ethers nke otu viscosity ọkwa, ma MC, HPMC, ma ọ bụ HEMC, mgbe niile na-egosi otu rheological Njirimara ma ọ bụrụhaala na ịta na okpomọkụ na-anọgide na-adịgide adịgide. Mgbe okpomọkụ na-ebili, a na-emepụta gel nhazi, na nnukwu thixotropic eruba na-eme. Cellulose ethers na elu ịta na ala viscosity na-egosi thixotropy ọbụna n'okpuru jel okpomọkụ. Ngwongwo a bara ezigbo uru maka ịhazigharị ọkwa na mbelata nke ngwa agha ụlọ n'oge a na-ewu ụlọ.
Entrainment ikuku
Ụkpụrụ na mmetụta na arụmọrụ arụ ọrụ: Cellulose ether nwere mmetụta ntinye ikuku dị ịrịba ama na ihe ndị dabeere na ciment ọhụrụ. Cellulose ether nwere ma hydrophilic otu (hydroxyl otu, ether otu) na hydrophobic otu (methyl otu, glucose mgbanaka). Ọ bụ surfactant na ọrụ elu, si otú a na-enwe mmetụta entrainment ikuku. Mmetụta ikuku ikuku ga-emepụta mmetụta bọlbụ, nke nwere ike imeziwanye arụmọrụ nke ihe ndị a na-agwakọta ọhụrụ, dị ka ịba ụba plasticity na ire ụtọ nke ngwa agha n'oge ọrụ, nke bara uru maka ịgbasa ngwa agha; ọ ga-abawanye mmepụta nke ngwa agha ma belata ọnụahịa mmepụta nke ngwa agha.
Mmetụta na ihe ndị na-emepụta ihe: Mmetụta ikuku ikuku ga-eme ka porosity nke ihe siri ike na-eme ka ọ dịkwuo elu ma belata ihe eji arụ ọrụ ya dị ka ike na mgbanwe mgbanwe.
Mmetụta dị na mmiri mmiri: Dị ka surfactant, cellulose ether nwekwara mmetụta wetting ma ọ bụ lubricating na akụkụ ciment, nke jikọtara ya na ikuku ikuku na-eme ka mmiri nke ihe ndị dabeere na ciment na-eme ka mmiri dịkwuo elu, ma mmetụta ya na-eme ka ọ dị arọ ga-ebelata mmiri mmiri. Mmetụta nke cellulose ether na mmiri mmiri nke ihe ndị dabeere na ciment bụ nchikota nke plasticizing na thickening mmetụta. N'ikwu okwu n'ozuzu, mgbe usoro ọgwụgwọ cellulose ether dị ntakịrị, ọ na-egosipụtakarị dị ka plasticizing ma ọ bụ mmetụta na-ebelata mmiri; mgbe usoro onunu ogwu di elu, mmetụta nke cellulose ether na-abawanye ngwa ngwa, mmetụta ikuku ya na-eme ka ọ bụrụ nke jupụtara na ya, n'ihi ya, ọ na-egosipụta dị ka ịkwanye ma ọ bụ ịba ụba nke mmiri.
Oge nzipu: Dec-23-2024