Kwi-mortar edibeneyo edibeneyo, inani elongezelelweyo le-hydroxypropyl methyl cellulose HPMC liphantsi kakhulu, kodwa linokuphucula kakhulu ukusebenza kodaka olumanzi, olulongezo olukhulu oluchaphazela ukwakhiwa kodaka. I-cellulose ethers kunye ne-viscosity eyahlukeneyo kunye nemali eyongezelelweyo inefuthe elihle ekuphuculweni kokusebenza kodaka olomileyo. Okwangoku, udaka oluninzi lwamatye kunye nodaka luneempawu ezingentle zokugcina amanzi, kwaye ukwahlulwa kodaka lwamanzi kwenzeka emva kwemizuzu embalwa yokuma ngxi. Ukugcinwa kwamanzi ngumsebenzi obalulekileyo we-methyl cellulose ether, kwaye ikwayintsebenzo apho abaninzi abavelisi bodaka olomileyo basekhaya, ngakumbi abo bakwiindawo ezinobushushu obuphezulu emzantsi, banikele ingqalelo kuyo. Izinto ezichaphazela umphumo wokugcinwa kwamanzi omdaka owomileyo ziquka inani le-HPMC eyongeziweyo, i-viscosity ye-HPMC, ukucolwa kwamasuntswana kunye nobushushu bendawo esetyenziswa kuyo.
1. Ingcamango: I-ether ye-cellulose yi-synthetic high molecular polymer eyenziwe kwi-cellulose yendalo ngokuguqulwa kweekhemikhali. I-ether ye-cellulose iphuma kwi-cellulose yendalo. Ukuveliswa kwe-cellulose ether kuyahluka kwiipolymers zokwenziwa. Izinto zayo ezisisiseko ziyi-cellulose, i-polymer compound yendalo. Ngenxa yesakhiwo esikhethekileyo se-cellulose yendalo, i-cellulose ngokwayo ayinakho ukusabela nge-etherifying agents. Kodwa emva kokuba i-ejenti yokuvuvukala iphathwe, i-hydrogen bonds eyomeleleyo phakathi kwamatyathanga e-molecular kunye nangaphakathi kwekhonkco iyatshatyalaliswa, kwaye ukukhutshwa okusebenzayo kweqela le-hydroxyl lijika libe yi-alkali cellulose esebenzayo. Emva kokuba i-arhente ye-etherification isabele, i -OH iqela liguqulelwa kwi -OR iqela. Fumana i-cellulose ether. Ubume be-cellulose ether buxhomekeke kuhlobo, ubuninzi kunye nokuhanjiswa kwezinto ezithatha indawo. Ulwahlulo lwe-cellulose ethers lukwasekelwe kwiintlobo ze-substituents, i-degree of etherification, i-solubility kunye nezicelo ezinxulumene nazo. Ngokohlobo lwababambeleyo kwitsheyini yemolekyuli, inokwahlulwa ibe yi-monoether kunye ne-ether edibeneyo. I-HPMC esiqhele ukuyisebenzisa ixutywe iether. IHydroxypropyl methyl cellulose ether I-HPMC yimveliso apho inxalenye yeqela le-hydroxyl kwiyunithi itshintshwa liqela le-methoxy kwaye enye indawo itshintshwe liqela le-hydroxypropyl. I-HPMC isetyenziswa kakhulu kwizinto zokwakha, iingubo ze-latex, amayeza, i-chemistry yemihla ngemihla, njl njl. Isetyenziswa njenge-thickener, i-arhente yokugcina amanzi, i-stabilizer, i-dispersant, kunye ne-agent ye-film-forming.
2. Ukugcinwa kwamanzi kwe-cellulose ether: kwimveliso yezinto zokwakha, ngakumbi udaka olomileyo, i-cellulose ether idlala indima engenakulinganiswa, ngakumbi ekuveliseni udaka olukhethekileyo (udaka olulungisiweyo), luyimfuneko. icandelo. Indima ebalulekileyo ye-ether ye-cellulose e-soluble emanzini kwi-mortar ikakhulu kwiinkalo ezintathu. Enye inamandla okugcina amanzi, enye yimpembelelo ehambelanayo kunye ne-thixotropy yodaka, kwaye okwesithathu kukusebenzisana nesamente. Ukugcinwa kwamanzi kwi-ether ye-cellulose kuxhomekeke ekufunxeni kwamanzi kwi-base layer, ukubunjwa kodaka, ukutyeba kodaka, imfuno yamanzi yodaka, kunye nexesha lokumisela izinto ezidibanisayo. Ukugcinwa kwamanzi kwe-ether cellulose ngokwayo kuvela kwi-solubility kunye nokuphelelwa ngamanzi kwe-cellulose ether ngokwayo.
i-thickening kunye ne-thixotropy ye-cellulose ether: Indima yesibini ye-cellulose ether-thickening ixhomekeke kwi: iqondo le-polymerization ye-cellulose ether, i-concentration concentration, iqondo lokushisa kunye nezinye iimeko. Iimpawu ze-gelation zesisombululo ziipropati ezikhethekileyo ze-alkyl cellulose kunye ne-derivatives yayo eguquliweyo. Iimpawu zeGelation zihambelana neqondo lokutshintshwa, ukugxilwa kwesisombululo kunye nezongezo.
Amandla okugcina amanzi alungileyo enza ukuba i-cement hydration iphelele ngakumbi, inokuphucula ukunyanzeliswa okumanzi kodaka olumanzi, ukwandisa amandla okubopha udaka, kwaye ixesha linokulungiswa. Ukongezwa kwe-cellulose ether kwi-mechanical spraying mortar kunokuphucula ukutshiza okanye ukumpompa ukusebenza kodaka, kunye namandla okwakhiwa. Ngoko ke, i-cellulose ether isetyenziswa ngokubanzi njengesongezo esibalulekileyo kwi-mortar esele ixutywe.
Ixesha lokuposa: Dec-16-2021