Ku-mortar exutshwe ngomumo, inani lokwengeza le-hydroxypropyl methyl cellulose HPMC liphansi kakhulu, kodwa lingathuthukisa kakhulu ukusebenza kwe-mortar emanzi, okuyisengezo esikhulu esithinta ukusebenza kokwakhiwa kwe-mortar. Ama-ether e-cellulose ane-viscosity ehlukene kanye nenani elengeziwe anomphumela omuhle ekuthuthukisweni kokusebenza kwe-mortar eyomile. Njengamanje, ama-mortar amaningi okwakha ngobumba kanye nokufaka i-plaster anezimpawu zokugcinwa kwamanzi ezimbi, futhi ukuhlukaniswa kwe-slurry yamanzi kwenzeka ngemva kwemizuzu embalwa yokuma. Ukugcinwa kwamanzi kuyindlela ebalulekile yokusebenza kwe-methyl cellulose ether, futhi futhi kuyindlela abakhiqizi abaningi be-mortar eyomile basekhaya, ikakhulukazi labo abasezindaweni ezinamazinga okushisa aphezulu eningizimu, abayinakayo. Izici ezithinta umphumela wokugcinwa kwamanzi kwe-mortar eyomile zifaka phakathi inani le-HPMC engeziwe, i-viscosity ye-HPMC, ubuncane bezinhlayiya kanye nokushisa kwendawo esetshenziswa kuyo.
1. Umqondo: I-Cellulose ether iyi-polymer yokwenziwa ephezulu yama-molecule eyenziwe nge-cellulose yemvelo ngokuguqulwa kwamakhemikhali. I-Cellulose ether iyi-derivative ye-cellulose yemvelo. Ukukhiqizwa kwe-cellulose ether kuhlukile kuma-polymer okwenziwa. Izinto zayo eziyisisekelo yi-cellulose, i-polymer compound yemvelo. Ngenxa yesakhiwo esikhethekile se-cellulose yemvelo, i-cellulose ngokwayo ayinawo amandla okusabela nama-etherifying agents. Kodwa ngemva kokwelashwa kwe-ejenti yokuvuvukala, izibopho ze-hydrogen ezinamandla phakathi kwamaketanga ama-molecule nangaphakathi kweketanga ziyabhujiswa, futhi ukukhululwa okusebenzayo kweqembu le-hydroxyl kuphenduka i-alkali cellulose esebenzayo. Ngemva kokuba i-etherification agent isabela, iqembu le--OH liguqulwa libe yiqembu le--OR. Thola i-cellulose ether. Uhlobo lwe-cellulose ether luncike ohlotsheni, ubuningi kanye nokusatshalaliswa kwama-substituents. Ukuhlukaniswa kwama-cellulose ethers nakho kusekelwe ezinhlotsheni zama-substituents, izinga le-etherification, ukuncibilika kanye nezicelo ezihlobene. Ngokusho kohlobo lwama-substituents ku-molecule chain, ingahlukaniswa ibe yi-monoether kanye ne-ether exubile. I-HPMC esivame ukuyisebenzisa yi-ether exubile. I-ether ye-Hydroxypropyl methyl cellulose HPMC iwumkhiqizo lapho ingxenye yeqembu le-hydroxyl kuyunithi ithathelwa indawo yiqembu le-methoxy kanti enye ingxenye ithathelwa indawo yiqembu le-hydroxypropyl. I-HPMC isetshenziswa kakhulu ezintweni zokwakha, izembozo ze-latex, imithi, ikhemistri yansuku zonke, njll. Isetshenziswa njenge-ejenti yokujiya, i-ejenti yokugcina amanzi, i-stabilizer, i-dispersant, kanye ne-ejenti yokwakha ifilimu.
2. Ukugcinwa kwamanzi kwe-cellulose ether: ekukhiqizweni kwezinto zokwakha, ikakhulukazi udaka olomile, i-cellulose ether idlala indima engenakuphindwa, ikakhulukazi ekukhiqizweni kodaka olukhethekile (udaka oluguquliwe), luyinto ebalulekile. Indima ebalulekile ye-cellulose ether encibilikayo emanzini kudaka ikakhulukazi inezici ezintathu. Esinye yikhono elihle kakhulu lokugcina amanzi, esinye yithonya ekuhambisaneni kanye ne-thixotropy yodaka, kanti esesithathu ukusebenzisana nesamente. Umphumela wokugcina amanzi we-cellulose ether uncike ekumuncweni kwamanzi kwesendlalelo esiyisisekelo, ukwakheka kodaka, ubukhulu besendlalelo sodaka, isidingo samanzi sodaka, kanye nesikhathi sokubeka kwezinto ezijiyile. Ukugcinwa kwamanzi kwe-cellulose ether ngokwayo kuvela ekuncibilikeni nasekuphelelweni kwamanzi kwe-cellulose ether uqobo.
ukuqina kanye ne-thixotropy ye-cellulose ether: Indima yesibili yokuqina kwe-cellulose ether incike ku: izinga lokupholimetha kwe-cellulose ether, ukuhlushwa kwesisombululo, izinga lokushisa kanye nezinye izimo. Izakhiwo ze-gelation zesisombululo ziyizakhiwo ezihlukile ze-alkyl cellulose kanye nezinto ezisuselwe kuzo eziguquliwe. Izici ze-gelation zihlobene nezinga lokushintshana, ukuhlushwa kwesisombululo kanye nezithasiselo.
Umthamo omuhle wokugcina amanzi wenza ukumuncwa kwesimende kuphelele, kungathuthukisa ukuqina okumanzi kwesimende esimanzi, kwandise amandla okubopha kwesimende, futhi isikhathi singalungiswa. Ukwengezwa kwe-cellulose ether kusimende sokufafaza ngomshini kungathuthukisa ukusebenza kokufafaza noma kokupompa kwesimende, kanye namandla esakhiwo. Ngakho-ke, i-cellulose ether isetshenziswa kabanzi njengesithasiselo esibalulekile kusimende esixutshwe ngomumo.
Isikhathi sokuthunyelwe: Disemba 16-2021