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 sama-bubbles kungenzeka ukuthi amanzi amaningi afakwe, 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.
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 ukulahlekelwa kwempushana. Uma kunokuthile okuphathelene ne-HPMC, khona-ke uma ukugcinwa kwamanzi kwe-HPMC kungalungile, 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-14-2023