Ukusetshenziswa kwe-HPMC ku-putty powder

1. Iyini i-viscosity efanele ye-HPMC?

——Impendulo: Ngokuvamile, ama-yuan ayi-100,000 anele i-putty powder. Izidingo ze-mortar ziphakeme, kanti ama-yuan ayi-150,000 ayadingeka ukuze kube lula ukuyisebenzisa. Ngaphezu kwalokho, umsebenzi obaluleke kakhulu we-HPMC ukugcina amanzi, kulandelwe ukujiya. Ku-putty powder, inqobo nje uma ukugcina amanzi kukuhle futhi i-viscosity iphansi (70,000-80,000), kungenzeka futhi. Vele, uma i-viscosity iphakeme, kungcono ukugcinwa kwamanzi. Lapho i-viscosity idlula i-100,000, i-viscosity izothinta ukugcinwa kwamanzi. Akusekho okuningi.

2. Yiziphi izinkomba zobuchwepheshe eziyinhlokoI-HPMC?

——Impendulo: Okuqukethwe kwe-hydroxypropyl kanye ne-viscosity, abasebenzisi abaningi bakhathazekile ngalezi zinkomba ezimbili. Labo abanokuqukethwe okuphezulu kwe-hydroxypropyl ngokuvamile banokugcinwa kwamanzi okungcono. Leyo enokugcinwa kwamanzi okungcono, uma kuqhathaniswa (hhayi ngokuphelele), kanti leyo enokugcinwa kwamanzi okuphezulu isetshenziswa kangcono ku-cement mortar.

3. Uyini umsebenzi oyinhloko wokusetshenziswa kwe-HPMC ku-putty powder, futhi ingabe kwenzeka ngamakhemikhali?

——Impendulo: Ku-putty powder, i-HPMC idlala indima ezintathu zokuqina, ukugcinwa kwamanzi kanye nokwakhiwa. Ukuqina: I-Cellulose ingaqiniswa ukuze imise futhi igcine isisombululo silingana phezulu naphansi, futhi imelane nokuwa. Ukugcinwa kwamanzi: yenza i-putty powder yome kancane, futhi isize i-calcium yomlotha ukuthi isabele ngaphansi kwesenzo samanzi. Ukwakhiwa: I-Cellulose inomphumela wokugcoba, ongenza i-putty powder ibe nokwakhiwa okuhle. I-HPMC ayihlanganyeli kunoma yikuphi ukusabela kwamakhemikhali, kodwa idlala indima yokusiza kuphela. Ukwengeza amanzi ku-putty powder bese uyibeka odongeni kuyindlela yokusabela kwamakhemikhali, ngoba kwakheka izinto ezintsha. Uma ususa i-putty powder odongeni, uyigaye ibe yi-powder, bese uyisebenzisa futhi, ngeke isebenze ngoba izinto ezintsha (i-calcium carbonate) sezivele zakhekile. ) futhi. Izakhi eziyinhloko zempuphu ye-calcium yomlotha yilezi: ingxube ye-Ca(OH)2, i-CaO kanye nenani elincane le-CaCO3, i-CaO+H2O=Ca(OH)2 —Ca(OH)2+CO2=CaCO3↓+H2O I-calcium yomlotha isemanzini nasemoyeni Ngaphansi kwesenzo se-CO2, kukhiqizwa i-calcium carbonate, kuyilapho i-HPMC igcina amanzi kuphela, isiza ukusabela okungcono kwe-calcium yomlotha, futhi ayihlanganyeli kunoma yikuphi ukusabela ngokwayo.

4. I-HPMC iyi-ether ye-cellulose engeyona i-ionic, ngakho-ke iyini i-non-ionic?

——Impendulo: Ngokwe-layman, ama-non-ion ayizinto ezingeke zi-ionise emanzini. I-ionization ibhekisela enkambisweni lapho i-electrolyte ihlukaniswa khona ibe ama-ion ashajekile angahamba ngokukhululeka ku-solvent ethile (njengamanzi, utshwala). Isibonelo, i-sodium chloride (NaCl), usawoti esiwudla nsuku zonke, uyancibilika emanzini futhi u-ionise ukuze ukhiqize ama-ion e-sodium ahambayo ngokukhululeka (Na+) ashajekile kahle kanye nama-ion e-chloride (Cl) ashajekile kabi. Okusho ukuthi, uma i-HPMC ifakwa emanzini, ngeke ihlukane ibe ama-ion ashajekile, kodwa ikhona ngesimo sama-molecule.

5. Ingabe kukhona ubudlelwano phakathi kokwehla kwempuphu ye-putty kanye ne-HPMC?

——Impendulo: Ukulahleka kwempuphu yempuphu ye-putty kuhlobene kakhulu nekhwalithi ye-calcium yomlotha, futhi akunandaba kangako ne-HPMC. Okuqukethwe kwe-calcium ephansi ye-calcium empunga kanye nesilinganiso esingafanele se-CaO kanye ne-Ca(OH)2 ku-calcium empunga kuzobangela ukulahleka kwempuphu. Uma kuhlobene ne-HPMC, khona-ke uma ukugcinwa kwamanzi kwe-HPMC kukubi, kuzobangela nokulahleka kwempuphu.

6. Indlela yokukhetha i-efanelekayoI-HPMCngezinhloso ezahlukene?

——Impendulo: Ukusetshenziswa kwempuphu ye-putty: izidingo ziphansi kakhulu, kanti i-viscosity ingu-100,000, okwanele. Into ebalulekile ukugcina amanzi kahle. Ukusetshenziswa kwe-mortar: izidingo eziphakeme, i-viscosity ephezulu, i-150,000 ingcono. Ukusetshenziswa kwe-glue: imikhiqizo esheshayo ene-viscosity ephezulu iyadingeka.