I-HPMC inokohlulwa ibe yibakala lokwakha, ibakala lokutya kunye nebakala lamayeza ngokwenjongo. Okwangoku, uninzi lweemveliso zasekhaya ngamabakala okwakha, kwaye kumabanga wokwakha, inani le-putty powder likhulu kakhulu. Xuba umgubo weHPMC kunye nesixa esikhulu sezinye izinto ezinomgubo, uzixube ngokucokisekileyo kunye nomxube, uze wongeze amanzi ukuze unyibilike, emva koko i-HPMC inokunyibilika ngeli xesha ngaphandle kwe-agglomeration, kuba yonke ikona encinci, i-HPMC powder idibana. amanzi. iyakunyibilika kwangoko. Umgubo weputty kunye nabavelisi bodaka basebenzisa le ndlela. IHydroxypropyl methylcellulose (HPMC) isetyenziswa njenge-thickener kunye ne-arhente yokugcina amanzi kwi-putty powder mortar.
Ukushisa kwejel ye-HPMC ihambelana nomxholo wayo we-methoxy, i-methoxy ephantsi umxholo we-methoxy ↓, ukuphakama kwe-gel ↑. Uhlobo lwangoko nangoko lwamanzi abandayo lwe-HPMC lunyangwa phezulu nge-glyoxal, kwaye lusasazeka ngokukhawuleza emanzini abandayo, kodwa alunyibiliki ngokwenene. Ichithwa kuphela xa i-viscosity inyuka. Iintlobo ezishushu ezinyibilikayo aziphathwa ngomphezulu nge-glyoxal. Ukuba inani le-glyoxal likhulu, ukusabalalisa kuya kukhawuleza, kodwa i-viscosity iya kwanda ngokukhawuleza, kwaye ukuba isixa sincinci, okuchaseneyo kuya kuba yinyani. I-HPMC inokohlulwa ibe yintlobo ekhawulezileyo kunye nohlobo lokutshatyalaliswa okushushu. Imveliso yohlobo olukhawulezayo isasazeka ngokukhawuleza emanzini abandayo kwaye iyanyamalala emanzini. Ngeli xesha, ulwelo akukho viscosity kuba HPMC isasazwe kuphela emanzini ngaphandle ukunyibilika yokwenene. Malunga nemizuzu emi-2, i-viscosity yolwelo iyanda ngokuthe ngcembe, yenze i-colloid ebonakalayo ebonakalayo. Iimveliso ezincibilikisiweyo ezishushu, xa zidibene namanzi abandayo, ziyakwazi ukusasazeka ngokukhawuleza emanzini ashushu kwaye zinyamalale emanzini ashushu. Xa iqondo lobushushu lehla ukuya kwiqondo elithile lobushushu, i-viscosity iya kubonakala kancinane ide yenze i-colloid ebonakalayo ebonakalayo. Uhlobo lwe-hot-melt lunokusetyenziswa kuphela kwi-putty powder kunye nodaka. Kwiglue yolwelo kunye nepeyinti, kuya kubakho i-grouping phenomenon kwaye ayinakusetyenziswa. Uhlobo olukhawulezileyo lunoluhlu olubanzi lwezicelo. Ingasetyenziselwa kwi-putty powder kunye nodaka, kunye neglue yamanzi kunye nepeyinti, ngaphandle kokuchasana.
I-HPMC eveliswa yindlela ye-solvent isebenzisa i-toluene kunye ne-isopropanol njenge-solvents. Ukuba ukuhlamba akulunganga kakhulu, kuya kubakho ivumba elishiyekileyo. Ukusetyenziswa kwe-putty powder: iimfuno ziphantsi, i-viscosity yi-100,000, yanele, into ebalulekileyo kukugcina amanzi kakuhle. Ukusetyenziswa komdaka: iimfuno eziphezulu, i-viscosity ephezulu, i-150,000 ingcono. Ukusetyenziswa kweglue: iimveliso ezikhawulezayo ezine-viscosity ephezulu ziyafuneka. Isixa se-HPMC esisetyenzisiweyo kwizicelo ezisebenzayo siyahluka ngokuxhomekeka kwimeko yemozulu, ubushushu, umgangatho wendawo ye-ash calcium, i-putty powder formula kunye "nomgangatho ofunwa ngabathengi". I-viscosity ye-hydroxypropyl methylcellulose (HPMC) -putty powder ngokuqhelekileyo i-100,000, kwaye imfuno yomdaka iphezulu, kwaye idinga i-150,000 ukuba ibe lula ukuyisebenzisa. Ngaphezu koko, owona msebenzi uphambili we-HPMC kukugcina amanzi, kulandele ukutyeba. Kwi-putty powder, ngokude nje ukugcinwa kwamanzi kulungile kwaye i-viscosity iphantsi (i-70,000-80,000), nayo inokwenzeka. Ngokuqinisekileyo, ukuphakama kwe-viscosity, ngcono ukugcinwa kwamanzi okuhambelanayo. Xa i-viscosity idlula i-100,000, i-viscosity iya kuchaphazela ukugcinwa kwamanzi. Hayi kakhulu; abo banomxholo ophezulu we-hydroxypropyl ngokubanzi banokugcinwa kwamanzi okungcono. Le ene-viscosity ephezulu inokugcinwa kwamanzi ngcono, kwaye leyo ine-viscosity ephezulu isetyenziswe ngcono kwi-samente mortar.
Kwi-putty powder, i-HPMC idlala iindima ezintathu zokuqina, ukugcinwa kwamanzi kunye nokwakhiwa. Musa ukuthatha inxaxheba kuzo naziphi na iimpendulo. Isizathu se-bubbles sinokuthi kufakwe amanzi amaninzi, okanye mhlawumbi umgangatho ongezantsi ungomile, kwaye enye ingqimba ikhutshiwe phezulu, kwaye kulula ukuphosa amagwebu. Ukuqina kwesiphumo se-HPMC kwi-putty powder: i-cellulose inokugqithwa ukuze inqunyanyiswe, gcina isisombululo esifanayo kwaye singaguquki, kwaye sixhathise ukugoba. Isiphumo sokugcinwa kwamanzi kwe-HPMC kwi-putty powder: yenza i-putty powder yome kancinci, kwaye uncedise i-ash calcium ukusabela phantsi kwesenzo samanzi. Umphumo wokwakha we-HPMC kwi-putty powder: i-cellulose inefuthe lokuthambisa, elinokwenza i-putty powder ibe nokwakhiwa kakuhle. I-HPMC ayithathi nxaxheba kuyo nayiphi na intshukumo yeekhemikhali, kodwa idlala indima encedisayo kuphela.
Ukulahlekelwa ngumgubo we-putty powder kuhambelana ikakhulu nomgangatho we-ash calcium, kwaye ayinanto encinci ne-HPMC. Umxholo ophantsi we-calcium we-gray calcium kunye nomlinganiselo ongafanelekanga we-CaO kunye ne-Ca (OH) i-2 kwi-gray calcium iya kubangela ukulahleka kwepowder. Ukuba inento yokwenza ne-HPMC, ngoko ukuba ukugcinwa kwamanzi kwe-HPMC kubi, kuya kubangela ukuba i powder iwe. Ukongeza amanzi kwi-putty powder kunye nokuyibeka eludongeni kukusabela kweekhemikhali, kuba izinto ezintsha zenziwe, kwaye i-putty powder eludongeni isuswe eludongeni. Phantsi, umhlaba ube ngumgubo, kwaye uphinde usebenzise, awuyi kusebenza, kuba izinto ezintsha (i-calcium carbonate) zenziwe. Amacandelo aphambili omgubo we-ash calcium zezi: umxube weCa(OH)2, iCaO kunye nesixa esincinci seCaCO3, CaO+H2O=Ca(OH)2—Ca(OH)2+CO2=CaCO3↓+H2O Ash calcium emanzini nasemoyeni Ngaphantsi kwesenzo se-CO2, i-calcium carbonate yenziwe, ngelixa i-HPMC igcina amanzi kuphela, incedisa ukusabela okungcono kwe-ash calcium, kwaye ayithathi nxaxheba kuyo nayiphi na impendulo ngokwayo.
Ixesha lokuposa: Mar-18-2023