Ijeli ye-silica iwuhlobo lwempahla ye-adsorption esebenza kakhulu.
Kuyinto e-amorphous futhi ifomula yayo yamakhemikhali ithi mSiO2.nH2O. Ihlangabezana nejwayelekile yamakhemikhali aseShayina i-HG/T2765-2005. Kuyinto ye-desiccant eluhlaza evunywe yi-FDA engathintana ngokuqondile nokudla nezidakamizwa. Ijeli ye-silica inekhono eliqinile le-hygroscopic, ukusebenza okunamandla kwe-adsorption, noma ngabe i-silica gel desiccant icwiliswe ngokuphelele emanzini, ngeke ithambe noma igcwale. Inezici zokungewona ubuthi, okunganambitheki, okungagqwali nokungangcolisi, ngakho-ke ingathintana ngqo nanoma iyiphi into. Izinto zokusetshenziswa ezidinga ukulungiswa ukukhiqizwa kwejeli ye-silica yilezi: i-sodium silicate (i-paucine, ingilazi yamanzi), i-sulfuric acid.
Okokuqala, i-alkali ne-asidi zilungiswa kusengaphambili, bese i-sodium silicate eqinile iyancibilika ekushiseni okuphezulu futhi ihlungwe ukuze kulungiswe uketshezi oluthile, bese i-sulfuric acid ilungiselelwa ekuhlanganiseni okuthile koketshezi, ukuhlushwa kwesulfuric. i-asidi ingu-20%.
Okwesibili, isinyathelo sesibili ukwenza iglue (i-gel granulation), lesi sinyathelo sibaluleke kakhulu, isisombululo se-bubble ye-bubble kanye ne-sulfuric acid ngaphansi kwezimo ezithile, ukuze kwakhiwe isisombululo sejeli encibilikayo, ngemva kokufinyelela ekugxilweni okufanele. abe izinhlayiya zejeli. Ukuma nobukhulu bezinhlayiya kunganqunywa ngokuphelele ngokuya ngezidingo zomsebenzisi namandla okukhiqiza. Indlela evamile ye-granulation ye-gel i-granulation yomoya, futhi isilinganiso se-acid-base, ukugxila, izinga lokushisa kanye nesikhathi se-gel granulation esisetshenziswe kunqubo ye-gel granulation yimingcele ethile yezobuchwepheshe.
Okwesithathu, ijeli yokuguga idinga ukudlula isilinganiso esithile sesikhathi nezinga lokushisa, kanye nenani le-PH ukuya eminyakeni yobudala, okwenza uhlaka lwamathambo ejeli luqine, ukufingqa kweglue phakathi kwezinhlayiya phakathi nenqubo yokuguga ukuze kwakhiwe izibopho ze-Si-O-Si, kuthuthukiswe. amandla ohlaka lwamathambo, izinhlayiya zisondelene, zinciphisa isikhala esakhiweni segridi, futhi amanzi aqukethwe kuwo acindezelwe.
I-Pickling, ukuwasha, i-glue yokugeza Ukukha, ukuwasha, ukuwasha iglue nakho kuyisinyathelo esibaluleke kakhulu kule nqubo, ngoba i-Na2SO4 eyakhiwe ijeli ye-granular iyagezwa. Lawula i-anion ngayinye ngaphakathi kwebanga elidingwa inqubo. Kungashiwo ukuthi ingxenye enkulu yezimpawu ze-pore zejeli ye-silica eqediwe inqunywa ukuguga kwenqubo yokugeza iraba, futhi izinga lokuguga lale nqubo lincike ekusebenzeni ekukhethweni, ukugeza, nokugeza irabha.
Okwesihlanu, ukomisa, i-hydrogel elungisiwe (emva kokugeza) ekamelweni lokumisa, ezimweni ezithile zokunciphisa okuqukethwe kwamanzi ejeli ngokwayo ukomisa ebangeni elidingekayo. Uma izinga lokushisa lokoma liphakeme, izinga lokuhlangana kwezinhlayiya eziyinhloko likhuphuka futhi libe likhulu imbobo.
Okuyisithupha, ukuhlolwa, umshini wokukhetha ibhola uzomiswa ngemva kwe-silicone ngokusebenzisa isikrini sezikhala ezihlukene ngokuhambisana nokuhlolwa kosayizi wezinhlayiyana ezithile, futhi ngesikhathi esifanayo kuzophulwa ukuhlolwa kwejeli ye-silica.
Okuyisikhombisa, i-glue yokukha: ijeli ye-silica ebholeni le-heterochromatic, ukungcola kuyakhethwa bese kusetshenziswa iphepha eliyinhlanganisela ngokwezidingo zephakeji, ngemuva kokuvalwa. Ngemuva kwezinyathelo ezingenhla, umkhiqizo we-silicone ukhiqizwa.
Isikhathi sokuthumela: Nov-14-2023
