Kodi Silicone Antifoam ndi chiyani?

Ma antifoam a silicone nthawi zambiri amapangidwa ndi silika wosungunuka ndi hydrophobic womwe umamwazika bwino mkati mwa madzi a silicone. Kenako chosakanizacho chimakhazikika kukhala emulsion yochokera m'madzi kapena mafuta. Ma antifoam awa ndi othandiza kwambiri chifukwa cha kusagwira kwawo mankhwala, mphamvu ngakhale pamlingo wochepa, komanso kuthekera kofalikira pa filimu ya thovu. Ngati pakufunika, amatha kuphatikizidwa ndi zinthu zina zolimba ndi zakumwa zosagwirizana ndi hydrophobic kuti awonjezere mphamvu zawo zochotsera poizoni.

Mankhwala oletsa thovu a silicone nthawi zambiri amakondedwa. Amagwira ntchito pochotsa mphamvu ya pamwamba ndi kusokoneza thovu la thovu, zomwe zimapangitsa kuti ligwe. Izi zimathandiza kuchotsa thovu lomwe lilipo mwachangu komanso zimathandiza kupewa kupangika kwa thovu.

Ubwino wa silicone defoamer

• Mitundu yosiyanasiyana ya ntchito

Chifukwa cha kapangidwe kake ka mankhwala ka mafuta a silicone, sichigwirizana ndi madzi kapena zinthu zomwe zili ndi magulu a polar, komanso ndi ma hydrocarbon kapena zinthu zachilengedwe zomwe zili ndi magulu a hydrocarbon. Popeza mafuta a silicone sasungunuka m'zinthu zambiri, silicone defoamer ili ndi ntchito zosiyanasiyana. Ingagwiritsidwe ntchito osati pongochotsa madzi, komanso pochotsa mafuta.

• Kuchepa kwa mphamvu ya pamwamba

Kuthamanga kwa pamwamba pa mafuta a silicone nthawi zambiri kumakhala 20-21 dynes/cm ndipo kumakhala kochepa kuposa kuthamanga kwa pamwamba pa madzi (72 dynes/cm) ndi zakumwa zoziziritsa thovu, zomwe zimapangitsa kuti thovu lizilamulira bwino.

• Kukhazikika bwino kwa kutentha

Potengera mafuta a dimethyl silicone omwe amagwiritsidwa ntchito kwambiri, kukana kutentha kwa nthawi yayitali kumatha kufika 150°C, ndipo kukana kutentha kwa nthawi yochepa kumatha kufika 300°C, kuonetsetsa kuti zinthu zochotsera poizoni za silicone zitha kugwiritsidwa ntchito pa kutentha kwakukulu.

• Kukhazikika bwino kwa mankhwala

Mafuta a silikoni ali ndi mphamvu zambiri pa mankhwala ndipo ndi ovuta kuyanjana ndi zinthu zina. Chifukwa chake, bola ngati mankhwalawa ndi oyenera, zinthu zochotsera poizoni wa silikoni zimaloledwa kugwiritsidwa ntchito m'makina okhala ndi ma acid, alkali, ndi mchere.

• Kulephera kwa thupi

Mafuta a silicone atsimikiziridwa kuti si oopsa kwa anthu ndi nyama. Chifukwa chake, ma silicone defoamers (okhala ndi ma emulsifiers oyenera osakhala oopsa, ndi zina zotero) angagwiritsidwe ntchito mosamala mu zamkati ndi mapepala, kukonza chakudya, zamankhwala, zamankhwala ndi mafakitale okongoletsa.

• Kunyoza mwamphamvu

Makina oyeretsera zinthu a silicone samangothyola thovu lomwe silikufunidwa, komanso amaletsa thovu kwambiri ndikuletsa thovu kupangika. Mlingo wake ndi wochepa kwambiri, ndipo gawo limodzi mwa magawo miliyoni (1 ppm kapena 1 g/m3) la kulemera kwa chinthu choyeretsera zinthu ndi lomwe lingawonjezedwe kuti lipange mphamvu yoyeretsera zinthu. Kuchuluka kwake kofala ndi 1 mpaka 100 ppm. Sikuti mtengo wake ndi wotsika kokha, komanso sudzadetsa zinthu zomwe zikuyeretsera zinthu.

Ma antifoam a silicone ndi ofunika chifukwa cha kukhazikika kwawo, kugwirizana ndi zinthu zosiyanasiyana, komanso kugwira ntchito bwino pakakhala kotsika. Komabe, ndikofunikira kuonetsetsa kuti akutsatira miyezo yoyendetsera ntchito ndipo ndi oyenera kugwiritsidwa ntchito mwanjira inayake kuti apewe zotsatirapo zoyipa pa khalidwe la malonda kapena chilengedwe.