Ijeli le-silica uhlobo lwezinto ezisetshenziswa kakhulu ekumunceni.
Kuyi-amorphous into futhi ifomula yayo yamakhemikhali yi-mSiO2.nH2O. Ihlangabezana nezinga lamakhemikhali laseShayina i-HG/T2765-2005. Kuyi-desiccant eluhlaza evunyelwe yi-FDA engathintana ngqo nokudla nemithi. Ijeli ye-silica inekhono eliqinile le-hygroscopic, ukusebenza okuqinile kokumuncwa, noma ngabe i-silica gel desiccant icwiliswe ngokuphelele emanzini, ngeke ithambise noma incibilike. Inezici zokungabi nobuthi, ukunambitheka, ukungagqwali kanye nokungangcolisi, ngakho-ke ingathintana ngqo nanoma iyiphi into. Izinto zokusetshenziswa ezidinga ukulungiswa ukuze kukhiqizwe ijeli ye-silica yilezi: i-sodium silicate (i-paucine, ingilazi yamanzi), i-sulfuric acid.
Okokuqala, i-alkali ne-asidi zilungiswa kusengaphambili, bese kuthi i-sodium silicate eqinile incibilikiswe ekushiseni okuphezulu bese ihlungwa ukuze kulungiselelwe ukuhlushwa okuthile koketshezi, bese kuthi i-sulfuric acid ilungiswe ibe ukuhlushwa okuthile koketshezi, ukuhlushwa kwe-sulfuric acid kungu-20%.
Okwesibili, isinyathelo sesibili ukwenza iglue (i-gel granulation), lesi sinyathelo sibaluleke kakhulu, isixazululo se-bubble lye esilungisiwe kanye ne-sulfuric acid ngaphansi kwezimo ezithile, ukuze kwakheke isixazululo se-gel esincibilikayo, ngemva kokufinyelela ekugxilweni okufanele kuzoba yizinhlayiya ze-gel. Ukuma nosayizi wezinhlayiya kunganqunywa ngokuphelele ngokwezidingo zomsebenzisi kanye namandla okukhiqiza. Indlela evamile ye-gel granulation i-air granulation, kanti isilinganiso se-acid-base, ukugxilwa, izinga lokushisa kanye nesikhathi se-gel granulation esisetshenziswa enkambisweni ye-gel granulation yizici zobuchwepheshe ezithile.
Okwesithathu, ijeli yokuguga idinga ukudlula esikhathini esithile kanye nokushisa, kanye nenani le-PH ngokuya ngobudala, okwenza uhlaka lwejeli luqine, ukujiya kweglue phakathi kwezinhlayiya ngesikhathi senqubo yokuguga ukuze kwakheke izibopho ze-Si-O-Si, kuthuthukiswe amandla ohlaka, izinhlayiya zisondelene, kuncishiswe isikhala esakhiweni segridi, futhi amanzi aqukethwe kuyo ayacindezelwa.
Ukugabha, ukuwasha, ukuwasha iglu Ukugabha, ukuwasha, ukuwasha iglu nakho kuyisinyathelo esibaluleke kakhulu kule nqubo, ngoba i-Na2SO4 eyakhiwe yijeli eliyi-granular iyagezwa. Lawula i-anion ngayinye ngaphakathi kobubanzi obudingekayo yinqubo. Kungashiwo ukuthi ingxenye enkulu yezimpawu zembobo yejeli ye-silica eqediwe inqunywa ukuguga kwenqubo yokuwasha irabha, futhi izinga lokuguga lale nqubo lincike ekusebenzeni kwenqubo yokugabha, ukuwasha, kanye nerabha.
Okwesihlanu, ukomisa, i-hydrogel elungisiwe (ngemuva kokuwasha) ifakwa egumbini lokomisa, ngaphansi kwezimo ezithile ukuze kuncishiswe okuqukethwe kwamanzi kwejeli ngokwayo komisa kuze kufike ebangeni elidingekayo. Uma izinga lokushisa lokomisa liphezulu, kulapho izinga lokuhlanganiswa kwezinhlayiya eziyinhloko liphakama khona futhi kulapho imbobo inkulu khona.
Eziyisithupha, ukuhlolwa, umshini wokukhetha ibhola uzomiswa ngemuva kokufaka i-silicone esikrinini sezindawo ezahlukene zokuvula ngokuhambisana nosayizi othile wezinhlayiya zokuhlola, futhi ngasikhathi sinye kuzophulwa ukuhlolwa kwejeli ye-silica.
Isikhombisa, ukukha iglu: ijeli ye-silica ebholeni le-heterochromatic, ukungcola kukhishwe bese kusetshenziswa iphepha elihlanganisiwe ngokwezidingo zephakheji, ngemuva kokuvalwa. Ngemva kwezinyathelo ezingenhla, kukhiqizwa umkhiqizo we-silicone.
Isikhathi sokuthunyelwe: Novemba-14-2023
