I-HPMC ingahlukaniswa ngebanga lokwakha, ibanga lokudla kanye nebanga lezemithi ngokwenhloso. Njengamanje, iningi lemikhiqizo yasekhaya ingamabanga wokwakha, futhi emabangeni okwakha inani le-putty powder likhulu kakhulu. Xuba i-HPMC powder nenani elikhulu lezinye izinto eziyimpuphu, uzixube kahle nge-mixer, bese wengeza amanzi ukuze uncibilike, khona-ke i-HPMC ingancibilika ngalesi sikhathi ngaphandle kokuhlanganiswa, ngoba wonke amakhona amancane, ingcosana ye-HPMC powder, ihlangana. amanzi. izoncibilika ngokushesha. Abakhiqizi be-putty powder kanye nodaka basebenzisa le ndlela. I-Hydroxypropyl methylcellulose (HPMC) isetshenziswa njenge-ejenti ejiya kanye ne-ejenti yokugcina amanzi kudaka lwe-putty powder.
Izinga lokushisa lejeli le-HPMC lihlobene nokuqukethwe kwayo kwe-methoxy, ukwehla kokuqukethwe kwe-methoxy ↓, kukhuphuka izinga lokushisa lejeli ↑. Uhlobo olusheshayo lwamanzi abandayo lwe-HPMC luphathwa phezulu nge-glyoxal, futhi luhlakazeka ngokushesha emanzini abandayo, kodwa aluncibiliki ngempela. Incibilika kuphela lapho i-viscosity ikhula. Izinhlobo ezincibilikayo ezishisayo aziphathwa nge-glyoxal. Uma inani le-glyoxal likhulu, ukuhlakazeka kuzoshesha, kodwa i-viscosity izokhula kancane, futhi uma inani lincane, okuphambene kuzoba yiqiniso. I-HPMC ingahlukaniswa ngohlobo olusheshayo kanye nohlobo lokuqedwa okushisayo. Umkhiqizo wohlobo olusheshayo uhlakazeka ngokushesha emanzini abandayo bese unyamalala emanzini. Ngalesi sikhathi, uketshezi alunayo i-viscosity ngoba i-HPMC ihlakazekile emanzini ngaphandle kokuhlakazeka kwangempela. Cishe imizuzu emi-2, i-viscosity yoketshezi iyanda kancane kancane, yakha i-viscous colloid esobala. Imikhiqizo encibilikayo eshisayo, lapho ihlangene namanzi abandayo, ingahlakazeka ngokushesha emanzini ashisayo futhi inyamalale emanzini ashisayo. Lapho izinga lokushisa lehlela ezingeni elithile lokushisa, i-viscosity izovela kancane kancane ize yakhe i-viscous colloid ebonakalayo. Uhlobo lwe-hot-melt lungasetshenziswa kuphela ku-putty powder nodaka. Ku-glue ewuketshezi nopende, kuzoba khona umcimbi wokuqoqa futhi awukwazi ukusetshenziswa. Uhlobo olusheshayo lunohlu olubanzi lwezinhlelo zokusebenza. Ingasetshenziswa ku-putty powder nodaka, kanye ne-glue ewuketshezi nopende, ngaphandle kokuphikisana.
I-HPMC ekhiqizwa indlela yokuncibilikisa isebenzisa i-toluene ne-isopropanol njengezincibilikisi. Uma ukugeza kungalungile kakhulu, kuzoba nephunga elisele. Ukusetshenziswa kwe-putty powder: izidingo ziphansi, i-viscosity yi-100,000, yanele, into ebalulekile ukugcina amanzi kahle. Ukusetshenziswa kodaka: izidingo eziphakeme, i-viscosity ephezulu, i-150,000 ingcono. Ukusetshenziswa kweglue: imikhiqizo esheshayo ene-viscosity ephezulu iyadingeka. Inani le-HPMC elisetshenziswa ekusebenzeni okusebenzayo liyahlukahluka kuye ngesimo sezulu, izinga lokushisa, izinga le-calcium yomlotha wendawo, ifomula ye-putty powder kanye "nekhwalithi edingwa amakhasimende". I-viscosity ye-hydroxypropyl methylcellulose (HPMC)-putty powder ngokuvamile i-100,000, futhi imfuneko yodaka iphakeme, futhi idinga i-150,000 ukuze ibe lula ukuyisebenzisa. Ngaphezu kwalokho, umsebenzi oyinhloko we-HPMC ukugcinwa kwamanzi, okulandelwa ukuqina. Ku-putty powder, inqobo nje uma ukugcinwa kwamanzi kuhle futhi i-viscosity iphansi (70,000-80,000), kungenzeka futhi. Yiqiniso, ukuphakama kwe-viscosity, kungcono ukugcinwa kwamanzi okuhlobene. Lapho i-viscosity idlula i-100,000, i-viscosity izothinta ukugcinwa kwamanzi. Hhayi kakhulu; labo abanokuqukethwe okuphezulu kwe-hydroxypropyl ngokuvamile banokugcinwa kwamanzi okungcono. Lena ene-viscosity ephezulu inokugcinwa kwamanzi okungcono, futhi leyo ene-viscosity ephezulu isetshenziswa kangcono odakeni lukasimende.
Ku-putty powder, i-HPMC idlala izindima ezintathu zokuqina, ukugcinwa kwamanzi kanye nokwakha. Ungabambi iqhaza kunoma yikuphi ukusabela. Isizathu samabhamuza singase sibe ukuthi amanzi amaningi afakwa, noma kungenzeka ukuthi ungqimba olungezansi alomile, futhi olunye ungqimba lukhishwe phezulu, futhi kulula ukwenza igwebu. Ukuqina komphumela we-HPMC ku-putty powder: i-cellulose ingajiywa ukuze imiswe, igcine iyunifomu yesixazululo futhi ingaguquki, futhi imelane nokuntenga. Umphumela wokugcina amanzi we-HPMC ku-putty powder: yenza i-putty powder yome kancane, futhi usize umlotha we-calcium ukuthi usabele ngaphansi kwesenzo samanzi. Umphumela wokwakha we-HPMC ku-putty powder: i-cellulose inomphumela wokugcoba, ongenza i-putty powder ibe nokwakhiwa okuhle. I-HPMC ayibambi iqhaza kunoma yikuphi ukusabela kwamakhemikhali, kodwa idlala indima yokusiza kuphela.
Ukulahlekelwa kwe-powder kwe-putty powder kuhlobene kakhulu nekhwalithi ye-ash calcium, futhi akuhlangene kangako ne-HPMC. I-calcium ephansi ye-calcium empunga kanye nesilinganiso esingalungile se-CaO ne-Ca(OH)2 ku-calcium empunga kuzodala ukulahleka kwempushana. Uma kunokuthile okuphathelene ne-HPMC, khona-ke uma ukugcinwa kwamanzi kwe-HPMC kumpofu, kuzophinde kubangele ukuthi impushana iwe. Ukwengeza amanzi ku-putty powder bese uyibeka odongeni ukusabela kwamakhemikhali, ngoba kwakhiwa izinto ezintsha, futhi i-putty powder odongeni ikhishwa odongeni. Phansi, igaywe ibe yimpushana, futhi iphinde isetshenziswe, ngeke isebenze, ngoba izinto ezintsha (i-calcium carbonate) zenziwe. Izingxenye eziyinhloko ze-ash calcium powder yilezi: ingxube ye-Ca(OH)2, i-CaO nenani elincane le-CaCO3, i-CaO+H2O=Ca(OH)2—Ca(OH)2+CO2=CaCO3↓+H2O Ash calcium isemanzini nasemoyeni Ngaphansi kwesenzo se-CO2, i-calcium carbonate ikhiqizwa, kuyilapho i-HPMC igcina amanzi kuphela, isiza ukusabela okungcono kwe-ash calcium, futhi ayihlanganyeli kunoma yikuphi ukusabela ngokwayo.
Isikhathi sokuthumela: Mar-18-2023