Njira yolekanitsa gel osakaniza olekanitsa seramu ndi magazi kuundana

Njira yakulekanitsa gel osakaniza

Gel yolekanitsa ya seramu imapangidwa ndi hydrophobic organic compounds ndi silika ufa.Ndi thixotropic mucus colloid.Kapangidwe kake kali ndi ma hydrogen bond ambiri.Chifukwa cha kuyanjana kwa ma hydrogen bond, ma network amapangidwa.Pansi pa mphamvu ya centrifugal, mawonekedwe a netiweki amawonongeka ndikusinthidwa.Kwa madzimadzi okhala ndi mamasukidwe otsika, mphamvu ya centrifugal ikatha, imapanganso dongosolo la maukonde, lomwe limatchedwa thixotropy.Ndiko kuti, pansi pa kutentha kosalekeza, mphamvu ina yamakina imagwiritsidwa ntchito ku ntchentche ya ntchofu, yomwe imatha kusintha kuchokera ku gel okwera kwambiri kupita ku malo otsika kwambiri, ndipo ngati mphamvu yamakina itayika, idzabwereranso. choyambirira cha gel osakaniza apamwamba kwambiri.Chodabwitsa cha gel ndi sol interconversion chifukwa cha zochita za mphamvu zamakina zidatchulidwa koyamba ndi Freundlich ndi Petrifi.Chifukwa chiyani kuyanjana pakati pa gel ndi sol kumachitika chifukwa cha mphamvu yamakina?Thixotropy ndi chifukwa chakuti mapangidwe a gel olekanitsa ali ndi chiwerengero chachikulu cha ma hydrogen bond network.Mwachindunji, chomangira cha haidrojeni sichimangopanga chomangira chimodzi chokha, komanso chimapanga chomangira chofooka cha haidrojeni ndi mamolekyu ena oyipa pazifukwa zina.Pa kutentha kwa firiji, chomangira cha haidrojeni chimakhala chosavuta kudulidwa kuti chipangitse kuyanjananso.Silica pamwamba ili ndi magulu a silyl hydroxyl (SiOH) kuti apange SiO molecular aggregates (primary particles), zomwe zimagwirizanitsidwa ndi ma hydrogen bonds kuti apange tinthu tating'onoting'ono tating'ono.Unyolo silika particles ndi particles wa hydrophobic organic pawiri kupanga kulekanitsa gel osakaniza zina kupanga haidrojeni zomangira kupanga maukonde dongosolo ndi kupanga gel osakaniza mamolekyu ndi thixotropy.

Mphamvu yokoka ya gel yolekanitsa imasungidwa pa 1.05, mphamvu yokoka ya seramu ndi pafupifupi 1.02, ndipo mphamvu yokoka ya magazi ndi pafupifupi 1.08.Pamene gel olekanitsa ndi magazi coagulated ndi centrifuged chimodzimodzi mayeso chubu, wa haidrojeni unyolo maukonde dongosolo mu silika aggregate amayamba ndi mphamvu centrifugal ntchito kulekanitsa gel osakaniza.Pambuyo pa kuwonongedwa, imakhala ngati mawonekedwe a unyolo, ndipo gel olekanitsa amakhala chinthu chokhala ndi viscosity yochepa.Kutsekeka kwa magazi kolemera kuposa gel olekanitsa kumayenda pansi pa chubu, ndipo gel olekanitsa amabwerera, kupanga zigawo zitatu za magazi / kulekanitsa gel / seramu pansi pa chubu.Pamene centrifuge imasiya kuyendayenda ndikutaya mphamvu ya centrifugal, tinthu tating'onoting'ono ta silika mu kupatukana gel osakaniza kupanga maukonde dongosolo kachiwiri ndi hydrogen zomangira, kubwezeretsa koyamba mkulu mamasukidwe akayendedwe gel osakaniza boma, ndi kupanga kudzipatula wosanjikiza pakati pa magazi kuundana mu seramu.