Kwi-mortar exutyiweyo esele ilungisiwe, ubungakanani bokongeza be-hydroxypropyl methyl cellulose HPMC buphantsi kakhulu, kodwa bunokuphucula kakhulu ukusebenza kwe-mortar emanzi, eyongeziweyo enkulu echaphazela ukusebenza kolwakhiwo lwe-mortar. Ii-ether ze-cellulose ezine-viscosity eyahlukileyo kunye nobungakanani obongeziweyo zinefuthe elihle ekuphuculeni ukusebenza kwe-mortar eyomileyo. Okwangoku, ii-mortar ezininzi ze-masonry kunye ne-plastering zineempawu zokugcina amanzi ezimbi, kwaye ukwahlukana kwe-slurry yamanzi kwenzeka emva kwemizuzu embalwa yokuma. Ukugcinwa kwamanzi ngumsebenzi obalulekileyo we-methyl cellulose ether, kwaye kukwangumsebenzi abavelisi abaninzi be-mortar eyomileyo basekhaya, ngakumbi abo bakwiindawo ezinamaqondo obushushu aphezulu emazantsi, abawunika ingqalelo. Izinto ezichaphazela isiphumo sokugcinwa kwamanzi kwe-mortar eyomileyo ziquka ubungakanani be-HPMC eyongeziweyo, i-viscosity ye-HPMC, ubuncinci bee-particles kunye nobushushu bendawo esetyenziswa kuyo.
1. Ingcamango: I-Cellulose ether yi-polymer eyenziwe nge-molecular ephezulu eyenziwe nge-cellulose yendalo ngokuguqulwa kweekhemikhali. I-Cellulose ether yi-derivative ye-cellulose yendalo. Ukuveliswa kwe-cellulose ether kwahlukile kwii-polymers zokwenziwa. Eyona nto iphambili yi-cellulose, i-polymer compound yendalo. Ngenxa yesakhiwo esikhethekileyo se-cellulose yendalo, i-cellulose ngokwayo ayinakho ukusabela kunye nee-etherifying agents. Kodwa emva kokuba i-agent yokudumba inyangiwe, ii-hydrogen bonds ezinamandla phakathi kwee-molecular chains kunye nangaphakathi kwe-chain ziyatshatyalaliswa, kwaye ukukhululwa okusebenzayo kweqela le-hydroxyl kuguquka kube yi-alkali cellulose esebenzayo. Emva kokuba i-etherification agent isabela, iqela le--OH liguqulwa libe liqela le--OR. Fumana i-cellulose ether. Uhlobo lwe-cellulose ether luxhomekeke kuhlobo, ubungakanani kunye nokusasazwa kwezinto ezithatha indawo. Ukuhlelwa kwee-cellulose ethers kusekwe kwiintlobo zezinto ezithatha indawo, inqanaba le-etherification, ukunyibilika kunye nokusetyenziswa okunxulumene noko. Ngokweentlobo zezinto ezithatha indawo kwi-molecular chain, inokwahlulwa ibe yi-monoether kunye ne-ether exutyiweyo. I-HPMC esihlala siyisebenzisa yi-mixed ether. I-Hydroxypropyl methyl cellulose ether I-HPMC yimveliso apho inxalenye yeqela le-hydroxyl kwiyunithi ithathelwa indawo liqela le-methoxy kwaye enye inxalenye ithathelwa indawo liqela le-hydroxypropyl. I-HPMC isetyenziswa kakhulu kwizixhobo zokwakha, kwiingubo ze-latex, kumayeza, kwikhemistri yemihla ngemihla, njl. Isetyenziswa njenge-thickener, i-arhente yokugcina amanzi, i-stabilizer, i-dispersant, kunye ne-arhente yokwenza ifilimu.
2. Ukugcinwa kwamanzi kwi-cellulose ether: ekuvelisweni kwezinto zokwakha, ingakumbi i-mortar eyomileyo, i-cellulose ether idlala indima engenakutshintshwa, ngakumbi ekuvelisweni kwe-mortar ekhethekileyo (i-mortar eguquliweyo), yinto engabalulekanga. Indima ebalulekileyo ye-cellulose ether enyibilikayo emanzini kwi-mortar ikakhulu ikwiinkalo ezintathu. Enye kukugcina amanzi kakuhle, enye yimpembelelo ekuhambelaneni kunye ne-thixotropy ye-mortar, kwaye eyesithathu kukusebenzisana nesamente. Isiphumo sokugcina amanzi se-cellulose ether sixhomekeke ekufunxeni kwamanzi kwi-base maleage, ukwakheka kwe-mortar, ubukhulu be-mortar, imfuno yamanzi ye-mortar, kunye nexesha lokubeka izinto ezijiyayo. Ukugcinwa kwamanzi kwe-cellulose ether ngokwayo kuvela ekunyibilikeni nasekuphelelweni kwamanzi kwe-cellulose ether ngokwayo.
ukuqina kunye ne-thixotropy ye-cellulose ether: Indima yesibini yokuqina kwe-cellulose ether ixhomekeke ku: inqanaba le-polymerization ye-cellulose ether, uxinano lwesisombululo, ubushushu kunye nezinye iimeko. Iipropati ze-gelation zesisombululo ziimpawu ezizodwa ze-alkyl cellulose kunye ne-derivatives zayo eziguquliweyo. Iimpawu ze-gelation zinxulumene nenqanaba lokutshintshwa, uxinano lwesisombululo kunye nezongezo.
Umthamo olungileyo wokugcina amanzi wenza ukuba i-samente igcwale ngakumbi, inokuphucula ukunamathela okumanzi kwe-mortar emanzi, yonyuse amandla okubopha kwe-mortar, kwaye ixesha lingalungiswa. Ukongezwa kwe-cellulose ether kwi-mortar yokutshiza ngoomatshini kunokuphucula ukusebenza kokutshiza okanye kokupompa kwe-mortar, kunye namandla esakhiwo. Ke ngoko, i-cellulose ether isetyenziswa kakhulu njengesongezelelo esibalulekileyo kwi-mortar exutyiweyo esele ilungisiwe.
Ixesha lokuthumela: Disemba-16-2021