Momwe mungaperekere silica pogwiritsa ntchito zida za akupanga?

Silika amagwiritsidwa ntchito m'mafakitale osiyanasiyana chifukwa chovala, kusokonezeka kwamagetsi komanso kukhazikika kwa matenthedwe. Kupanga Kubala kumathandizira kuti kutsegulira silika pokonzanso mtundu.

Ntchito ya Silika
Silika (Sio2) ndi zinthu zamafuta ambiri omwe amagwiritsidwa ntchito m'mafakitale osiyanasiyana kuti zithandizire mawonekedwe ndi makina a zinthu zosiyanasiyana. Amagwiritsidwa ntchito ngati chofananira, owonjezera owonjezera, rheology osintha kapena kukonzanso thandizo m'malo ambiri opanga ndi zokutira, pluths, zomata kapena zomata kapena zosindikizira. Makamaka, silika fume (amorphous silica) kapena microsiaica imawonjezedwa konkriti kuti ikhale yothandiza kulimba mtima komanso kulimba. Silika fume imagwiritsidwanso ntchito mu konkriti wophatikizira kuti muchepetse chidwi ndikuwonjezera mphamvu kudzera pakuwongolera tinthu.

Silika Batani
Silika akupezeka mu mitundu yosiyanasiyana ya hydrophilic ndi hydrophobic mafomu ndipo nthawi zambiri amagwiritsidwa ntchito mu tinthu tating'onoting'ono kwambiri. Nthawi zambiri, silika samabalalika bwino pambuyo ponyowa. Zimawonjezeranso thovu kakang'ono kwambiri kwa mpweya.
Kwa mapulogalamu ambiri a silika, zofalitsa zabwino ndi yunifolomu ndizofunikira. Makamaka akamagwiritsidwa ntchito pautoto ndi mabulu amphaka kuti athe kukana kukakana, tinthu tating'onoting'ono tifunika kukhala ochepa mokwanira kuti musasokoneze kuwala ndikupewa kudekha. Kwa zokutira zambiri, silika ayenera kukhala ochepera 40nm kuti akwaniritse izi. Pa mapulogalamu ena, tinthu tating'onoting'ono timalepheretsa tinthu chilichonse cholumikizira tinthu tating'onoting'ono. Ultrasonication yatsimikizira kuti ikhale yothandiza kwambiri mu silika kufalikira poyerekeza ndi njira zina zosakanikirana zina. Pamasamba ophatikizika oposa 200 ma Microns, tinthu tating'onoting'ono tambiri zidachepetsedwa mpaka zosakwana 200.

Chithandizo cha Akupanga
Ma ufa atatu a TiO2 adagwiritsidwa ntchito pantchitoyi: Nanoparticle P25, Nanoparticle St21 ndi submicron ht0514. P25 ndi HT0514 adakonzedwa ndi gawo la gasi; ST21 idapangidwa ndi manyowa onyowa. Sodium Pulyacrylates (Paa) ndi zolemera pafupifupi 1200, 2100, 15000 ndi 30,000 zidagwiritsidwa ntchito ngati polymeric osabala. Kuti akonze kuyimitsidwa kwamadzi, tio2 ufa unali wosakanizidwa ndi pamwa m'madzi. Sinthani PH ndi Ammonia yankho (20%, kalasi yowunikira). Kwa sonication, 50 ml ya kuyimitsidwayo inali kusinthidwa mu 100 ml kwa mphindi 30. Popewa madzi otentha ndi kuphatikiza pasa, kuyimitsidwa kawiri kokha ka 10 kwa 3 min aliyense, popeza 3 min yopitilira muyeso yopitilira 60-70 ° C. Pambuyo mphindi zitatu za njira iliyonse yotsatira, kuyimitsidwa kunakhazikika kwa mphindi 10.

Tidagwiritsa ntchito zida ziwiri za akupanga, pafupipafupi: 20 kHz; Matalikidwe: 30 - mm; Mbadwo Wamphamvu: 70 - 120 W; Mutu wa pamutu: 26 mm, mutatha mphindi 30 akupanga chithandizo, madzi adachepetsedwa ndi 10 chifukwa cha Evaptoation ml. Zolemera zimayesedwa kale ndi pambuyo sonication, ndipo madzi oyera adawonjezeredwa kuti abweze zotayika. Mosasamala kanthu za matalikidwe ndi cholembera, mawonekedwe a tinthu tating'onoting'ono tambiri tomwe timatamandire ndi nthawi yochepa. Pambuyo pake yankho limakhala lowonekera ndipo sio2 tinthu tating'onoting'ono.