NKWUP P
Ugbu a, ihe eji achọta ihe dị ugbu a bụ ngwa kachasị ukwuu nke ngwa agha a gwakọtara agwakọta, nke mejupụtara ya site na nchịkọta ciment, mmalite nke mgbakwunye na ndị ọzọ na-eri nri. N'ozuzu, ọ dị mma ka agwakọta na mmiri mgbe eji ya. E jiri ya tụnyere ngwa agha ciment nkịtị, ọ nwere ike rụọ ọrụ nke njikọ dị n'etiti ihe na ihe na-eche ihu na mkpụrụ, ma nwee ezigbo ndọtị na mmiri dị mma. A na-ejikarị ihe eji achọ mma mee ihe dị ka taịl na mpụga, taịl nile, ala, ụlọ ịsa ahụ na ebe ndị ọzọ ịchọ mma. Ọ bụ ihe eji eme ihe na-ejikarị eme ihe.
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. Ọ bụghị naanị n 'ọ bụghị naanị na-emetụta ihe nrapado, dị ka ọrụ dị mma, na-arapara n'ahụ, wdg, mana nwekwara mmetụta siri ike na usoro arụmọrụ
2. Mmetụta na oge mmeghe nke tale
Mgbe roba ntụ ntụ ahụ na-acha odo odo na mmiri na-egosi na mmiri roba na-egosi ike poble nwere ike sie ike iji gbakwunye na mmiri ọkụkụ, nke na-emetụta nkà ndị ọzọ na-emetụta ahụhụ na ọnọdụ. 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 nke cellose ether n'elu ihe ọkụkụ ahụ nwere nnukwu mmetụta na arụmọrụ nke ngwa agha. 1) Ihe nkiri a guzobere dị oke mkpa ma a ga-egbutu ya ugboro abụọ, nke na-enweghị ike amachibido ikuku 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.
3. Mmetụta ahụ na ike
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 na-abawanye ụba vires a na-ahụ maka ihe ngwọta ahụ.
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.
Nkata nke cellulose Ether dabere na ihe owuwu kemịkalụ ya, maka mhec, dị elu ogo nke methylose 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.
Ntụle usoro anyị na-ahụta na ọdịnaya nke ndị jibu ihe na-arụ ọrụ dị mkpa na ike arụ ọrụ nke taịlị. Anyị na-enyocha arụmọrụ nke HPMC na ogo dị iche iche nke dochie anya, ma nwalee mmetụta nke ndị eyers cellushose nwere ọdịiche dị iche iche na akụrụngwa dị iche iche nke ndị na-eme ihe.
Na ule ahụ, anyị na-atụle HPMC, nke bụ onyinye ether, yabụ anyị ga-etinye foto abụọ. Maka HPMC, ọ chọrọ ogo nnabata nnabata iji hụ na mmiri na-eso ya na ntụgharị ọkụ. Anyị maara na ọdịnaya nke ndị ejikọ ya na-ekpebikwa Gel nke HPMC, nke na-ekpebikwa iji gburugburu ebe obibi HPMC. N'ụzọ dị otu a, ọdịnaya nke HPMC nke a na-eme ka a na-emepụtakwa n'ime oke. N'akụkụ a, otu esi ejikọta methoxy na hydropoxy iji nweta nsonaazụ kachasị mma bụ ọdịnaya nke nyocha anyị. Ọgụgụ 2 na-egosi na n'ime ụfọdụ dị iche iche, mmụba na ọdịnaya dị iche iche nke methoxyl ga-eduga na mpaghara a na-adọkpụ, ebe mmụba na otu hydropopolopolopody nwere ike ibute mmụba na ike. 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: Jan-09-2023