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.HPMC inokohlulwa ibe uhlobo olukhawulezileyo kunye nohlobo eshushu-ukuchithwa.Imveliso yohlobo olukhawulezayo isasazeka ngokukhawuleza emanzini abandayo kwaye iyanyamalala emanzini.Ngeli xesha, ulwelo akukho viscosity kuba HPMC isasazwe kuphela emanzini ngaphandle ukunyibilika real.Malunga nemizuzu emi-2, i-viscosity yolwelo iyanda ngokuthe ngcembe, yenze i-colloid ebonakalayo ebonakalayo.Iimveliso ze-Hot-melt, xa zidibene namanzi abandayo, ziyakwazi ukusabalalisa 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 omnye ungqimba ukhutshiwe 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 ukuba iphendule 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.Amalungu aphambili omgubo we-ash calcium zezi: umxube weCa(OH)2, iCaO kunye nentwana yeCaCO3, CaO+H2O=Ca(OH)2—Ca(OH)2+CO2=CaCO3↓+H2O Ash calcium isemanzini 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