I-HPMC inokwahlulwahlulwa ibe ziinqanaba zokwakha, izinga lokutya kunye nenqanaba leyeza ngokwenjongo. Okwangoku, uninzi lweemveliso zasekhaya ziinqanaba zokwakha, kwaye kwiinqanaba zokwakha, ubungakanani be-putty powder bukhulu kakhulu. Xuba i-HPMC powder kunye nenani elikhulu lezinye izinto ezi-powdery, uzixube kakuhle ngomxube, uze wongeze amanzi ukuze unyibilike, emva koko i-HPMC inokunyibilika ngeli xesha ngaphandle kokuhlanganiswa, kuba yonke ikona encinci, intwana encinci ye-HPMC powder, idibana namanzi. Abavelisi be-putty powder kunye ne-mortar basebenzisa kakhulu le ndlela. I-Hydroxypropyl methylcellulose (HPMC) isetyenziswa njenge-thickener kunye ne-arhente yokugcina amanzi kwi-putty powder mortar.
Ubushushu bejeli ye-HPMC bunxulumene nomxholo wayo we-methoxy, okukhona umxholo we-methoxy uphantsi ↓, kokukhona ubushushu bejeli buphezulu ↑. Uhlobo lwe-HPMC lwamanzi abandayo olukhawulezileyo luphathwa nge-glyoxal, kwaye lusasazeka ngokukhawuleza emanzini abandayo, kodwa alunyibiliki ngokwenene. Lunyibilika kuphela xa i-viscosity isanda. Iintlobo ze-hot melt azinyangwa ngumphezulu nge-glyoxal. Ukuba ubungakanani be-glyoxal bukhulu, i-dispersion iya kuba ngokukhawuleza, kodwa i-viscosity iya kunyuka kancinci, kwaye ukuba ubungakanani buncinci, okuchaseneyo kuya kuba yinyani. I-HPMC inokwahlulwa ibe yi-instant type kunye ne-hot-dissolution type. Imveliso ye-instant type isasazeka ngokukhawuleza emanzini abandayo kwaye inyamalale emanzini. Ngeli xesha, ulwelo aluna-viscosity kuba i-HPMC isasazeka kuphela emanzini ngaphandle kokunyibilika ngokwenene. Malunga nemizuzu emi-2, i-viscosity yolwelo iyanda kancinci kancinci, yenze i-colloid ebonakalayo e-viscous. Iimveliso ze-hot-melt, xa zidibene namanzi abandayo, zinokusasazeka ngokukhawuleza emanzini ashushu kwaye zinyamalale emanzini ashushu. Xa ubushushu buhla bufikelela kubushushu obuthile, i-viscosity iya kubonakala kancinci ide yenze i-colloid ecacileyo ene-viscous. Uhlobo lwe-hot-melt lungasetyenziswa kuphela kwi-putty powder kunye ne-mortar. Kwi-glue kunye nepeyinti engamanzi, kuya kubakho i-grouping phenomenon kwaye ayinakusetyenziswa. Uhlobo lwe-instant lunoluhlu olubanzi lwezicelo. Lungasetyenziswa kwi-putty powder kunye ne-mortar, kunye ne-glue kunye nepeyinti engamanzi, ngaphandle kweziphazamiso.
I-HPMC eveliswa yindlela yokunyibilikisa isebenzisa i-toluene kunye ne-isopropanol njengezinyibilikisi. Ukuba ukuhlamba akulunganga kakhulu, kuya kubakho ivumba elishiyekileyo. Ukusetyenziswa komgubo we-putty: iimfuno ziphantsi, i-viscosity yi-100,000, kwanele, into ebalulekileyo kukugcina amanzi kakuhle. Ukusetyenziswa komgubo we-mortar: iimfuno eziphezulu, i-viscosity ephezulu, i-150,000 ingcono. Ukusetyenziswa kweglue: iimveliso ezikhawulezileyo ezine-viscosity ephezulu ziyafuneka. Ubungakanani be-HPMC obusetyenziswayo kwizicelo ezisebenzayo buyahluka ngokuxhomekeke kwimeko-bume yemozulu, ubushushu, umgangatho we-calcium yomlotha wendawo, ifomula yomgubo we-putty kunye "nomgangatho ofunekayo kubathengi". I-viscosity yomgubo we-hydroxypropyl methylcellulose (HPMC)-putty ngokubanzi yi-100,000, kwaye imfuneko yomgubo we-mortar iphezulu, kwaye ifuna i-150,000 ukuze kube lula ukuyisebenzisa. Ngaphezu koko, umsebenzi ophambili we-HPMC kukugcinwa kwamanzi, kulandelwe kukuqina. Kwi-putty powder, logama nje ukugcinwa kwamanzi kulungile kwaye ubuninzi buphantsi (70,000-80,000), kunokwenzeka. Kakade ke, xa ubuninzi buphezulu, kokukhona ukugcinwa kwamanzi kuphezulu. Xa ubuninzi bungaphezulu kwe-100,000, ubuninzi buya kuchaphazela ukugcinwa kwamanzi. Hayi kakhulu; abo banomxholo ophezulu we-hydroxypropyl ngokubanzi banokugcinwa kwamanzi okungcono. Lowo ubuninzi bungangcono ukugcinwa kwamanzi, kwaye lowo ubuninzi bungangcono usetyenziswe kwi-samente mortar.
Kwi-putty powder, i-HPMC idlala indima ezintathu zokutyeba, ukugcinwa kwamanzi kunye nokwakhiwa. Musa ukuthatha inxaxheba kuyo nayiphi na i-reaction. Isizathu sale maqamza sisenokuba kukufakwa amanzi amaninzi, okanye kusenokuba umaleko osezantsi awomileyo, kwaye omnye umaleko uyakrwelwa phezulu, kwaye kulula ukuwenza ube negwebu. Isiphumo sokutyeba se-HPMC kwi-putty powder: i-cellulose inokutyeba ukuze imiswe, igcine isisombululo sifana kwaye sihambelana, kwaye imelane nokugoba. Isiphumo sokugcina amanzi se-HPMC kwi-putty powder: yenza i-putty powder yome kancinci, kwaye incede i-ash calcium ukuba isabele phantsi kwesenzo samanzi. Isiphumo sokwakha se-HPMC kwi-putty powder: i-cellulose inesiphumo sokuthambisa, esinokwenza i-putty powder ibe nolwakhiwo oluhle. I-HPMC ayithathi nxaxheba kuyo nayiphi na i-chemical reactions, kodwa idlala indima yokuncedisa kuphela.
Ukulahleka komgubo we-putty powder kuxhomekeke kakhulu kumgangatho we-ash calcium, kwaye akunanto yakwenza ne-HPMC. Umxholo ophantsi we-calcium ye-grey calcium kunye nomlinganiselo ongafanelekanga we-CaO kunye ne-Ca(OH)2 kwi-grey calcium kuya kubangela ukulahleka komgubo. Ukuba inento yokwenza ne-HPMC, ke ukuba ukugcinwa kwamanzi kwe-HPMC akukuhle, kuya kubangela ukuba umgubo uwe. Ukongeza amanzi kumgubo we-putty kunye nokuwubeka eludongeni yimpendulo yamakhemikhali, kuba izinto ezintsha zenziwa, kwaye umgubo we-putty eludongeni uyasuswa eludongeni. Ukwehla, kugaywe kube ngumgubo, kwaye kusetyenziswe kwakhona, akuyi kusebenza, kuba izinto ezintsha (i-calcium carbonate) zenziwe. Izinto eziphambili ze-ash calcium powder zezi: umxube we-Ca(OH)2, i-CaO kunye ne-CaCO3 encinci, i-CaO+H2O=Ca(OH)2—Ca(OH)2+CO2=CaCO3↓+H2O I-ash calcium ikwi-water and air Phantsi kwe-CO2, i-calcium carbonate iveliswa, ngelixa i-HPMC igcina amanzi kuphela, inceda ukusabela ngcono kwe-ash calcium, kwaye ayithathi nxaxheba kuyo nayiphi na i-reaction ngokwayo.
Ixesha lokuthumela: Matshi-18-2023