Kodi mungapange bwanji gel ya silica?

Silika gel ndi mtundu wa zinthu zomwe zimakhudzidwa kwambiri ndi madzi.
Ndi chinthu chosasinthika ndipo njira yake ya mankhwala ndi mSiO2.nH2O. Imakwaniritsa muyezo wa mankhwala aku China wa HG/T2765-2005. Ndi zinthu zopangira desiccant zomwe zavomerezedwa ndi FDA zomwe zimatha kukhudzana mwachindunji ndi chakudya ndi mankhwala. Silica gel ili ndi mphamvu yamphamvu yosakanikirana ndi madzi, imayamwa bwino, ngakhale silica gel desiccant itamizidwa kwathunthu m'madzi, siidzafewa kapena kusungunuka. Ili ndi makhalidwe osakhala ndi poizoni, osakoma, osawononga komanso osadetsa, kotero imatha kukhudzana mwachindunji ndi chinthu chilichonse. Zipangizo zopangira zomwe ziyenera kukonzedwa popanga silica gel ndi: sodium silicate (paucine, water glass), sulfuric acid.

Choyamba, alkali ndi asidi zimakonzedwa pasadakhale, kenako sodium silicate yolimba imasungunuka kutentha kwambiri ndikusefedwa kuti ikonze kuchuluka kwa madzi, kenako sulfuric acid imakonzedwa kufika ku kuchuluka kwa madzi, kuchuluka kwa sulfuric acid ndi 20%.

Chachiwiri, gawo lachiwiri ndikupanga guluu (gel granulation), gawo ili ndilofunika kwambiri, yankho la bubble lye ndi sulfuric acid zomwe zasinthidwa kale pansi pa mikhalidwe inayake, kuti apange yankho la gel losungunuka, pambuyo pofika kuchuluka koyenera lidzakhala tinthu ta gel. Mawonekedwe ndi kukula kwa tinthu ta gel zitha kudziwika kwathunthu malinga ndi zosowa za wogwiritsa ntchito komanso mphamvu yake yopangira. Njira yodziwika bwino yopangira gel granulation ndi air granulation, ndipo chiŵerengero cha acid-base, kuchuluka, kutentha ndi nthawi yopangira gel yomwe imagwiritsidwa ntchito mu ndondomeko ya gel granulation ndi magawo enieni aukadaulo.

Chachitatu, jeli yokalamba iyenera kudutsa nthawi ndi kutentha kwina, komanso PH kuti ikule, zomwe zimapangitsa kuti chigoba cha jeli chikhale cholimba, guluu pakati pa tinthu tating'onoting'ono panthawi yokalamba kuti apange ma bond a Si-O-Si, kuwonjezera mphamvu ya chigobacho, tinthu tating'onoting'ono timakhala pafupi, kuchepetsa malo mu kapangidwe ka gridi, ndipo madzi omwe ali mmenemo amachotsedwa.

Kusamba, kutsuka, kutsuka guluu Kusamba, kutsuka, kutsuka guluu ndi gawo lofunika kwambiri pa ntchitoyi, chifukwa Na2SO4 yopangidwa ndi gel yosungunuka imatsukidwa. Yang'anirani anion iliyonse mkati mwa kuchuluka komwe kumafunika pa ntchitoyi. Tinganene kuti mbali yaikulu ya mawonekedwe a silika gel yomalizidwa imatsimikiziridwa ndi kukalamba kwa njira yotsuka raba, ndipo kukalamba kwa njirayi kumadalira momwe ntchitoyi imagwirira ntchito posamba, kutsuka, ndi kutsuka raba.

Chachisanu, kuumitsa, hydrogel yokonzedwa (mutatha kutsuka) kulowa m'chipinda choumitsira, m'mikhalidwe inayake kuti muchepetse kuchuluka kwa madzi mu gel yokha kuti iume kufika pamlingo wofunikira. Kutentha kouma kukakwera, kuchuluka kwa tinthu tating'onoting'ono toyambira kumakwera ndipo kutsegula kwake kumakula.

Six, kuphimba, makina osankha mpira adzauma pambuyo pa silicone kudutsa pazenera la mabowo osiyanasiyana mogwirizana ndi kukula kwa tinthu tating'onoting'ono, ndipo nthawi yomweyo silika gel yowunikira idzasweka.

Seveni, kusankha guluu: silica gel mu mpira wa heterochromatic, kuchotsa zinyalala kenako kugwiritsa ntchito pepala lopangidwa molingana ndi zofunikira za phukusi, mutatseka. Pambuyo pa masitepe omwe ali pamwambapa, chinthu cha silikoni chimapangidwa.