1. Kuyini ukusetshenziswa okuyinhloko kwei-hydroxypropyl methylcellulose (HPMC)?
I-HPMC isetshenziswa kabanzi ezintweni zokwakha, ezimbozweni, ezitsheni zokwenziwa, ezitsheni zobumba, kwezokwelapha, ekudleni, ezindwangu, kwezolimo, ezimonyweni, egwayi nakwezinye izimboni. I-HPMC ingahlukaniswa ngebanga lokwakha, izinga lokudla kanye nezinga lemithi ngokwenhloso. Njengamanje, iningi lemikhiqizo yasekhaya liyibanga lokwakha. Ebangeni lokwakha, i-putty powder isetshenziswa ngenani elikhulu, cishe u-90% usetshenziselwa i-putty powder, kanti okusele kusetshenziselwa udoti wesamente.
2. Liyini iphunga le-hydroxypropyl methylcellulose (HPMC)?
I-HPMC ekhiqizwa ngendlela ye-solvent isebenzisa i-toluene ne-isopropanol njengezincibilikisi. Uma ukugeza kungalungile kakhulu, kuzoba nephunga elisele.
3. Yiziphi izindlela zokuncibilikisa i-hydroxypropyl methylcellulose (HPMC)?
Indlela yokuncibilikisa amanzi ashisayo: Njengoba i-HPMC ingancibilikisi emanzini ashisayo, i-HPMC ingahlakazeka ngokulinganayo emanzini ashisayo esigabeni sokuqala, bese incibilika ngokushesha uma ipholile. Izindlela ezimbili ezijwayelekile zichazwa kanje:
1) Faka inani elidingekayo lamanzi ashisayo esitsheni bese ulifudumeza cishe ku-70°C. I-hydroxypropyl methylcellulose yengezwa kancane kancane ngaphansi kokuxubha kancane, ekuqaleni i-HPMC yantanta phezu kwamanzi, yabe isiba yisicaba kancane kancane, esasipholiswa ngaphansi kokuxubha.
2), engeza i-1/3 noma i-2/3 yenani lamanzi elidingekayo esitsheni, bese ulishisa ku-70°C, usakaze i-HPMC ngokwendlela yoku-1), bese ulungisa i-slurry yamanzi ashisayo; bese ufaka inani elisele lamanzi abandayo ku-slurry yamanzi ashisayo, ingxube ipholiswe ngemva kokuyixuba.
Indlela yokuxuba i-powder: hlanganisa i-HPMC powder nenani elikhulu lezinye izinto eziwumpuphu, hlanganisa kahle ngomshini wokuxuba, bese ufaka amanzi ukuze ancibilike, khona-ke i-HPMC ingancibilika ngalesi sikhathi ngaphandle kokuhlanganiswa, ngoba kukhona i-HPMC encane kuphela ekhoneni ngalinye elincane i-Powder, izoncibilika ngokushesha uma ithintana namanzi. ——Abakhiqizi be-Putty powder kanye ne-mortar basebenzisa le ndlela. [I-Hydroxypropyl methylcellulose (HPMC) isetshenziswa njenge-thickener kanye ne-ejenti yokugcina amanzi ku-putty powder mortar.]
4. Ungahlulela kanjani ikhwalithi ye-hydroxypropyl methylcellulose (HPMC) kalula nangokuqondakalayo?
(1) Ubumhlophe: Nakuba ubumhlophe bungenakunquma ukuthi i-HPMC kulula ukuyisebenzisa, futhi uma kungezwa izinto zokwenza mhlophe ngesikhathi senqubo yokukhiqiza, kuzothinta ikhwalithi yayo. Kodwa-ke, imikhiqizo eminingi emihle inobumhlophe obuhle.
(2) Ubunono: Ubunono be-HPMC ngokuvamile bunama-mesh angu-80 kanye nama-mesh angu-100, kanti ama-mesh angu-120 angaphansi. Iningi le-HPMC elikhiqizwa e-Hebei lingama-mesh angu-80. Uma ubunono buncane, ngokuvamile, kuba ngcono.
(3) Ukudlulisa ukukhanya: bekai-hydroxypropyl methylcellulose (HPMC)emanzini ukuze kwakheke i-colloid esobala, bese ubheka ukuhanjiswa kwayo kokukhanya. Uma ukuhanjiswa kokukhanya kukhulu, kungcono, okubonisa ukuthi kunezincane ezingancibiliki kuwo. . Ukugeleza kwama-reactor aqondile ngokuvamile kuhle, kanti ama-reactor aqondile kubi kakhulu, kodwa akusho ukuthi ikhwalithi yama-reactor aqondile ingcono kuneyama-reactor aqondile, futhi ikhwalithi yomkhiqizo inqunywa yizici eziningi.
(4) Amandla adonsela phansi athile: Uma amandla adonsela phansi athile emakhulu, kulapho esinda khona. Amandla adonsela phansi aphezulu, ngokuvamile ngoba okuqukethwe yiqembu le-hydroxypropyl elikuyo kuphakeme, kanti okuqukethwe yiqembu le-hydroxypropyl kuphakeme, ukugcinwa kwamanzi kungcono.
5. Uyini umehluko phakathi kohlobo lwe-cold-water instant kanye nohlobo lwe-hydroxypropyl methylcellulose oluncibilikayo enqubweni yokukhiqiza?
Uhlobo lokusabalala okusheshayo lwe-HPMC luphathwa nge-glyoxal ebusweni, futhi lusabalala ngokushesha emanzini abandayo, kodwa aluncibiliki ngempela. Luncibilika kuphela lapho i-viscosity ikhula. Uhlobo olusheshayo alunawo ukwelashwa kwendawo nge-glyoxal. Uma inani le-glyoxal likhulu, ukusabalala kuzoba ngokushesha, kodwa i-viscosity izokhula kancane, futhi uma inani lincane, okuphambene nalokho kuzoba yiqiniso.
6. Iyini i-viscosity efanele ye-hydroxypropyl methylcellulose (HPMC)?
Impuphu ye-putty ngokuvamile ingama-yuan ayi-100,000, kanti 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. Kumpuphu ye-putty, 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.
7. Yiziphi izinkomba zobuchwepheshe eziyinhloko ze-hydroxypropyl methylcellulose (HPMC)?
Okuqukethwe kwe-hydroxypropyl kanye ne-viscosity, abantu 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.
8. Yiziphi izinto eziyinhloko zokusetshenziswa kwe-hydroxypropyl methylcellulose (HPMC)?
Izinto zokusetshenziswa eziyinhloko ze-hydroxypropyl methylcellulose (HPMC): ukotini ocolisisiwe, i-methyl chloride, i-propylene oxide, nezinye izinto zokusetshenziswa, i-caustic soda, i-acid, i-toluene, i-isopropanol, njll.
9. Uyini umsebenzi oyinhloko wokusetshenziswa kweI-HPMCku-putty powder, futhi ingabe kwenzeka ngamakhemikhali?
Ku-putty powder, i-HPMC idlala indima ezintathu zokuqina, ukugcinwa kwamanzi kanye nokwakhiwa.
Ukuqina: I-Cellulose ingaqiniswa ukuze imiswe futhi igcine isisombululo silingana phezulu naphansi, futhi simelane nokuwa.
Ukugcinwa kwamanzi: yenza i-putty powder yome kancane, futhi usize i-calcium yomlotha ukuthi isabele ngaphansi kokusebenza kwamanzi.
Ukwakhiwa: I-Cellulose inomphumela wokugcoba, ongenza i-putty powder ibe nokwakhiwa okuhle.
Ukwengeza amanzi ku-putty powder bese uyibeka odongeni kuyisenzo samakhemikhali, 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.
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.
10. I-HPMC iyi-ether ye-cellulose engeyona i-ionic, ngakho-ke iyini i-non-ionic?
Ngokwe-layman, ama-non-ion ayizinto ezingayi-ion 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 bese uyayi-ion 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.
11. Lihlobene kanjani izinga lokushisa lejeli le-hydroxypropyl methylcellulose?
Izinga lokushisa lejeli le-HPMC lihlobene nokuqukethwe kwayo kwe-methoxy, uma okuqukethwe kwe-methoxy kuphansi, izinga lokushisa lejeli liphakeme.
12. Ingabe kukhona ubudlelwano phakathi kokwehla kwempuphu ye-putty kanye ne-HPMC?
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 i-HPMC inokugcinwa kwamanzi okungekuhle, izobangela nokulahleka kwempuphu.
13. Uyini umehluko phakathi kohlobo lwe-cold-water instant kanye nohlobo lwe-hydroxypropyl methylcellulose oluncibilikayo enqubweni yokukhiqiza?
Uhlobo lokusabalala okusheshayoI-HPMCiphathwa nge-glyoxal ebusweni, futhi isakazeka ngokushesha emanzini abandayo, kodwa ayincibiliki ngempela. Incibilika kuphela lapho i-viscosity ikhula. Uhlobo olusheshayo alunawo ukwelashwa kwe-surface nge-glyoxal. Uma inani le-glyoxal likhulu, ukuhlakazeka kuzoba ngokushesha, kodwa i-viscosity izokhula kancane, futhi uma inani lincane, okuphambene nalokho kuzoba yiqiniso.
Isikhathi sokuthunyelwe: Ephreli-25-2024