A na-eji ngwaahịa simenti, dị ka kọnkịtị, ngwa agha, na ihe ndị ọzọ e ji arụ ụlọ, eme ihe n'ụlọ ọgbara ọhụrụ. Ethers cellulose (dị ka hydroxypropyl methylcellulose (HPMC), hydroxyethyl methylcellulose (HEMC), wdg) bụ ihe mgbakwunye dị mkpa nke nwere ike imeziwanye arụmọrụ nke ngwaahịa ciment. Iji nweta ihe ndị a magburu onwe ya, ọ dị oké mkpa ịmụta na ịchịkwa ọrụ nke cellulose ethers.
1. Ihe ndị bụ isi na ọrụ nke cellulose ethers
Cellulose ethers bụ klaasị kemịkalụ sitere na cellulose eke, nke otu ether nọchiri akụkụ nke hydroxyl otu akụkụ site na mmeghachi omume etherification. Enwere ike ịmepụta ụdị cellulose ethers dị iche iche dịka ụdị na ọnụ ọgụgụ nke ndị na-anọchi anya ya, na ụdị ọ bụla nwere ọrụ dị iche iche na ngwaahịa ciment.
Viscosity nke cellulose ethers:
Viscosity nke cellulose ethers na-emetụta rheology na nkwụsi ike nke tapawa ciment. Ethers cellulose viscosity dị elu nwere ike melite njide mmiri na ike njikọ nke mado, mana ọ nwere ike ibelata mmiri ya. Ethers cellulose dị ala na-enweghị viscosity na-enyere aka melite arụ ọrụ na mmiri.
Ogo nke nnọchi (DS) na nnọchi molar (MS):
Ogo nke nnọchi na molar nnọchi nke cellulose ethers na-ekpebi ike ya na viscosity nke ngwọta. Ọkwa dị elu nke ngbanwe na ngbanwe dị elu nwere ike imeziwanye njide mmiri na nkwụsi ike nke ethers cellulose.
Solubility nke cellulose ethers:
Ọnụego mgbasa na solubility nke cellulose ethers na-emetụta ịdị n'otu nke tapawa ciment. Cellulose ethers nwere ezigbo solubility nwere ike ịmepụta otu ngwọta ngwa ngwa, si otú ahụ na-eme ka ịdị n'otu na nkwụsi ike nke mado ahụ.
2. Họrọ cellulose ethers kwesịrị ekwesị
Ọnọdụ ngwa dị iche iche nwere ọrụ dị iche iche chọrọ maka ether cellulose. Ịhọrọ ụdị ziri ezi na nkọwapụta nke cellulose ether nwere ike imeziwanye arụmọrụ nke ngwaahịa ciment:
Ihe nkedo:
N'ime ngwa ndị dị ka adhesives tile na plasta, ethers cellulose viscosity dị elu (dị ka HPMC) nwere ike inye mmachi dị mma na mmiri mmiri na-adịgide adịgide, si otú ahụ na-emeziwanye arụmọrụ ihe owuwu na ike njikọ ikpeazụ.
Ihe na-ejigide mmiri:
N'ime ngwa agha na-edozi onwe ya na ihe nkedo nke simenti dabeere na ciment, cellulose ethers nwere nnukwu mmiri na-ejide mmiri (dị ka HEMC). Njide mmiri dị elu na-enyere aka igbochi mmiri ozuzo akaghi aka, si otú a hụ na mmeghachi omume hydration zuru ezu na ogologo oge ọrụ.
Ihe na-ewusi ike:
Cellulose ethers eji eme ka ike nke ciment ngwaahịa kwesịrị inwe ezigbo dispersibility na agafeghị oke viscosity iji welie uniformity na ike nke matriks.
3. Kwalite usoro mgbakwunye
Ijikwa usoro mgbakwunye nke cellulose ether na ngwaahịa ciment dị oké mkpa iji mee ka ọ dị irè. Ndị a bụ ọtụtụ ụzọ njikarịcha nke ọma:
Usoro mmalite:
Gwakọta cellulose ether na ihe ndị ọzọ akọrọ ntụ ntụ tupu oge eruo. Usoro a nwere ike zere e guzobere agglomeration nke cellulose ether mgbe kpọmkwem kọntaktị na mmiri, si otú huu ya edo dispersion na slurry.
Usoro agwakọta mmiri:
Tinye cellulose ether na ciment slurry nke nta nke nta. Usoro a dabara adaba maka ọnọdụ ebe cellulose ether na-agbaze ngwa ngwa ma na-enyere aka ịmepụta nkwusioru kwụsiri ike.
Usoro mgbakwunye ekewapụrụ:
N'ime usoro ịkwadebe ciment slurry, ịgbakwunye cellulose ether na ngalaba nwere ike hụ na nkesa otu ya n'oge usoro nkwadebe ma belata agglomeration.
4. Njikwa ihe ndị dị n'èzí
Ihe ndị dị na mpụga dị ka okpomọkụ, uru pH, na ọnụ ọgụgụ na-akpali akpali nwere mmetụta dị ukwuu na arụmọrụ cellulose ether.
Njikwa okpomọkụ:
Solubility na viscosity nke cellulose ether na-enwe mmetụta dị ukwuu na okpomọkụ. Okpomọkụ dị elu na-enyere cellulose ether aka igbari ngwa ngwa, mana ọ nwekwara ike ime ka viscosity nke ngwọta belata. Ekwesịrị imezi ọnọdụ okpomọkụ dị ka ọnọdụ ngwa a kapịrị ọnụ iji hụ na arụ ọrụ na arụmọrụ kacha mma.
Ndozi pH: Uru pH nke ciment tapawa na-abụkarị na oke alkaline dị elu, ebe solubility na viscosity nke cellulose ether na-agbanwe na mgbanwe nke pH uru. Ịchịkwa uru pH n'ime oke kwesịrị ekwesị nwere ike ime ka ọrụ cellulose ether guzosie ike.
Ọnụ ọgụgụ na-akpali akpali: Ọnụ ọgụgụ na-akpali akpali na-emetụta mmetụta mgbasa nke cellulose ether na tapawa ciment. Oke mkpali dị elu nwere ike ibute iwebata ikuku na mkpokọta cellulose ether, ebe ọ̀tụ̀tụ̀ mkpali na-agafe agafe na-enyere aka kesaa na igbari ether cellulose.
5. Nyocha ikpe na aro ndị bara uru
Site na nyocha n'ezie, anyị nwere ike ịghọtakwu ngwa na atụmatụ kachasị mma nke cellulose ether na ngwaahịa ciment dị iche iche:
Ngwunye tile na-arụ ọrụ dị elu: Mgbe ụlọ ọrụ na-emepụta ihe na-arụ ọrụ dị elu, a chọpụtara na njide mmiri nke ngwaahịa mbụ ezughị ezu, na-eme ka mbelata ike njikọ mgbe e wuchara ya. Site n'iwebata HEMC na-ejigide mmiri dị elu ma na-edozi ego mgbakwunye ya na usoro mgbakwunye ya (iji usoro nke mbụ), njigide mmiri na njikọ ike nke nrapado taịl ahụ ka mma nke ọma.
Ngwongwo ala na-edozi onwe ya: Ihe eji eme ihe na-edozi onwe ya nke a na-eji na-arụ ọrụ na-adịghị mma na adịghị mma n'elu ala mgbe e wuchara ya. Site n'ịhọrọ obere viscosity HPMC na optimizing na-akpali akpali ọnụego na okpomọkụ akara, na fluidity na ewu arụmọrụ nke slurry na-mma, na-eme ka ikpeazụ n'ala elu smoother.
Ịchịkwa ọrụ nke cellulose ether na ngwaahịa ciment bụ isi ihe na-eme ka arụ ọrụ ihe dị mma na mma ụlọ. Site n'ịhọrọ ụdị cellulose ether nke ọma, na-eme ka usoro mgbakwunye ahụ dịkwuo mma, na ịchịkwa ihe ndị na-emetụta mpụga, ihe ndị bụ isi nke ngwaahịa ciment dị ka njide mmiri, nkwụsịtụ, na mmiri mmiri nwere ike ime ka ọ dịkwuo mma. N'ime ngwa bara uru, ọ dị mkpa iji nọgide na-ebuli ma mezie iji cellulose ether dị ka mkpa dị iche iche na ngwa ngwa iji nweta nsonaazụ kacha mma.
Oge nzipu: Jun-26-2024