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 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 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. 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-14-2023