Tile nrapasive bụ otu n'ime ngwa kachasị ukwuu nke ngwa agha akọrọ akpọnwụ na ugbu a. Nke a bụ ụdị ciment dị ka ihe na-adọrọ adọrọ ma gbakwunye ya site na nchịkọta ndị agụnyere, ndị ọrụ na-ejigide, mgbịrịgba isi ike na ndị ọzọ organic. ngwakọta. N'ozuzu, ọ dị mma ka agwakọta na mmiri mgbe eji ya. E jiri ya tụnyere osisi ciment nkịtị, ọ nwere ike ime ka nkekọ nke njikọ dị n'etiti ihe na ihe ndị nwere na mkpụrụ, nwere ezigbo ndọpụ ngọngọ ma nwee ezigbo nguzogide na iguzogide mmiri. Na uru nke nguzosi ike na-eguzogide nguzobe, tumadi iji paste na mgbidi na mpụga, ụlọ ebe a na-eji ihe eji achọ mma, bụ ihe ejikọtara ọnụ na-acha uhie uhie na-eji.
Ọ na-abụkarị mgbe anyị na-ekpe ikpe arụmọrụ nke taịlị, anyị abụghị naanị ị paya ntị na arụmọrụ na ikike na-egbochi ya, kamakwa attentiona ntị na ike ya na oge ya. Celler na tather na -agagharị ọ bụghị naanị na-emetụta ọrụ ngọngọ, dị ka ọrụ dị mma, mma ịrapara, wdg, mana nwekwara mmetụta siri ike na akụrụngwa arụ ọrụ nke taịl. Mmetụta n'oge mmeghe nke taịl nrapado
Mgbe roba ntụ ntụ na-acha odo odo na mgbochi mmiri na mmiri, na ntụ ntụ ahụ siri ike iji gbasa mmiri hydestitial, nke na-emetụta ịgba agha ọzọ karịa na ọnọdụ na ntọala. Elu elu elu celdilose dị elu karịa nke ahụ nke roba ntụ ntụ, na ndị ọzọ cellulose na-eme ka ọ bụrụ nke agbụ hydrogen n'etiti isi ala.
Na mgbochi mmiri, mmiri dị na ngwa agha ahụ na-emebi, a ga-ewepụ ihe nkiri na-agbaze n'elu mmiri, na ọpụpụ mmiri ga-ewetakwu sellitment na elu ala.
Ya mere, ihe nkiri a na-eme nke cellulose eather n'elu ngwa agha nwere nnukwu mmetụta na arụmọrụ nke ngwa agha.
1) Ihe nkiri a guzobere dị oke mkpa, a ga-egbutu ya ugboro abụọ, enweghị ike ịkwụsịlata mmiri ma belata ike.
2) Ihe nkiri a guzobere dị oke mkpa, ịta ahụhụ nke cellulose na ngwa agha dị na ngwa agha dị elu, yabụ na ọ dịghị mfe imebi ihe nkiri ahụ mgbe a na-agabiga taịlị.
Enwere ike ịhụ ya na akụrụngwa na-akpụ akpụ akpụ akpụ eathel nwere mmetụta dị ukwuu na oge gboo. Ofdị cellulose ether (hpmc, hemc, MC, MCC) na ogo nke ihe nkiri ahụ na-emetụta ihe nkiri na-akpụ akpụ nke mkpụrụ osisi na-akpụ akpụ nke sel, na nke siri ike na ihe nkiri.
Na mgbakwunye na inye ihe ndị bara uru a kpọtụrụ aha maka ngwa agha, sel ehet na-egbukwa hydration kinetics kinetics nke ciment. Ntinye a na-azụ ahịa bụ n'ihi na adsorption nke cellorption eliduction moder mostated, a na-ekwu okwu na-ekwu okwu na mmiri dị ka CSH na Calcium hydroxide. Na ngwaahịa kemịkal, ọ na-adịkarịghị agbasa mgbasa ozi mbụ nke clinker. Na mgbakwunye, sel mkpụrụ osisi na-ebelata ngagharị nke eons (ca2-, ...) na ngwọta pore n'ihi mmụba na vice ngwọta ahụ na-abawanye usoro hydration.
Visate bụ parameter ọzọ dị mkpa, nke na-anọchite anya njirimara kemịkal nke cellulose ether. Dị ka m kwuru n'elu, viscosity na-emetụta ikike njigide mmiri ma nweekwa mmetụta dị ukwuu na ọrụ ọhụrụ. Agbanyeghị, nyocha nnwale achọpụtala na viscosity nke sellose ether na-enweghị mmetụta na hydrary kinetics. Igo molecular nwere obere mmetụta na hydration, na kacha dị iche n'etiti oke mmiri dị iche iche bụ naanị 10min. Ya mere, ibu molecula abụghị ihe dị mkpa iji chịkwaa hydration hydration.
"Ngwa nke cellulose na nke na-eji ngwa agha ciment akọrọ na-esi chara acha" rụpụtara na azụta azụ nke Ether na-adabere na ihe owuwu kemịkal ya. Na General a na-emegharị bụ na maka mhec, dị elu ogo nke methylation, nke pere mpe na-arụ ọrụ nke cellulose ether. Na mgbakwunye, ego na-akwụ ụgwọ nke ndọtị hydrophilic (dịka dochie anya Hydrophilic) siri ike karịa nke hydrophobic nnọchi (dị ka dochie nbanye nke MH, MHEC, MHPC). Mmetụta nke cellulose Ewer na-emetụta paradaị abụọ, ụdị na ọnụọgụ nke otu dị iche iche.
Nnwale usoro sistemụ chọpụtakwara na ọdịnaya nke ndị jibu ọrụ na-arụ ọrụ dị mkpa na ike arụ ọrụ nke taịlị na-addesives. Maka HPMC, a chọrọ ogo ọkọnọ iji hụ na mmiri sochiri ya na transminance ọkụ. Ọdịnaya nke ndị uwe ojii na-ekpebi ike HPMC. Ọnọdụ gel na-ekpebikwa gburugburu HPMC. N'ime ụfọdụ, mmụba dị na ọdịnaya nke otu metoxy ga-eweta ihe na-agbadata n'ike n'ike, ebe mmụba na ọdịnaya nke otu hydropopoxy ga-eduga na mbelata. na-eme ihe. Enwere mmetụta yiri nke ahụ maka imeghe.
Ngbanwe nke ike ya n'okpuru ọnọdụ emepere emepe bụ ihe kwekọrọ na nke ọnọdụ okpomọkụ nkịtị. HPMC na elu methoxyl (ds) na obere hydroxypropoxyl (ms) nwere ezigbo ike nke ihe nkiri ahụ, mana ọ ga-emetụta mmiri mgbochi mmiri ahụ na ntụle. Ihe Njirimara.
Oge post: Feb-14-2025