Epoxy ndizodziwika kwa aliyense.Mtundu uwu wa zinthu organic amatchedwanso yokumba utomoni, utomoni guluu, etc. Ndi mtundu wofunika kwambiri wa pulasitiki thermosetting.Chifukwa cha kuchuluka kwa magulu omwe amagwira ntchito komanso polar, mamolekyu a epoxy resin amatha kulumikizidwa ndikuchiritsidwa ndi mitundu yosiyanasiyana ya machiritso, ndipo zinthu zosiyanasiyana zimatha kupangidwa powonjezera zowonjezera zosiyanasiyana.

Monga utomoni wa thermosetting, utomoni wa epoxy uli ndi ubwino wokhala ndi thupi labwino, kutsekemera kwa magetsi, kumamatira kwabwino, kukana kwa alkali, kukana kwa abrasion, kupanga bwino, kukhazikika komanso mtengo wotsika.Ndi imodzi mwazofunikira kwambiri zomwe zimagwiritsidwa ntchito muzinthu za polima .. Pambuyo pazaka zopitilira 60 za chitukuko, epoxy resin yakhala ikugwiritsidwa ntchito mu zokutira, makina, zakuthambo, zomangamanga ndi zina.

Pakadali pano, utomoni wa epoxy umagwiritsidwa ntchito kwambiri pantchito zokutira, ndipo zokutira zomwe zimapangidwa nazo monga gawo lapansi zimatchedwa epoxy resin coating.Akuti ❖ kuyanika kwa epoxy resin ndi chinthu chodzitchinjiriza chomwe chingagwiritsidwe ntchito kuphimba chilichonse, kuyambira pansi, zida zazikulu zamagetsi mpaka zida zazing'ono zamagetsi, kuziteteza ku kuwonongeka kapena kuvala.Kuphatikiza pa kukhala olimba kwambiri, zokutira za epoxy resin nthawi zambiri zimagonjetsedwa ndi zinthu monga dzimbiri ndi dzimbiri la mankhwala, kotero zimakhala zotchuka m'mafakitale ndi ntchito zosiyanasiyana.

Chinsinsi cha kukhazikika kwa zokutira za epoxy

Popeza utomoni wa epoxy uli m'gulu la polima wamadzimadzi, umafunika kuthandizidwa ndi machiritso, zowonjezera ndi utoto kuti ukhale wokutira wa epoxy wosachita dzimbiri.Mwa iwo, ma nano oxides nthawi zambiri amawonjezedwa ngati inki ndi zodzaza ndi zokutira za epoxy resin, ndipo oyimira ena ndi silika (SiO2), titanium dioxide (TiO2), aluminium oxide (Al2O3), zinc oxide (ZnO), ndi ma oxides osowa padziko lapansi.Ndi kukula kwake kwapadera ndi kapangidwe kake, ma nano oxides awa amawonetsa zinthu zambiri zapadera zakuthupi ndi zamankhwala, zomwe zimatha kupititsa patsogolo kwambiri makina ndi anti-corrosion properties of zokutira.

Pali njira ziwiri zazikulu za ma oxides nano particles kuti apititse patsogolo chitetezo cha zokutira za epoxy:

Choyamba, ndi kukula kwake kochepa, kumatha kudzaza ming'alu yaying'ono ndi pores yomwe imapangidwa ndi shrinkage ya m'deralo panthawi ya machiritso a epoxy resin, kuchepetsa kufalikira kwa njira zowononga zowonongeka, ndikuwonjezera chitetezo ndi ntchito zotetezera ❖ kuyanika;

Chachiwiri ndikugwiritsa ntchito kuuma kwakukulu kwa tinthu tating'onoting'ono towonjezera kuuma kwa utomoni wa epoxy, potero kumawonjezera mphamvu zamakina za zokutira.

Kuphatikiza apo, kuwonjezera kuchuluka koyenera kwa tinthu tating'onoting'ono ta nano oxide kumatha kuwonjezera mphamvu yolumikizira mawonekedwe a zokutira za epoxy ndikukulitsa moyo wautumiki wa zokutira.

Udindo wanano silikaunga:

Pakati pa ma oxides nanopowders, nano silicon dioxide (SiO2) ndi mtundu wa kupezeka kwakukulu.Silika nano ndi inorganic sanali zitsulo chuma kukana kutentha ndi kukana makutidwe ndi okosijeni.Maselo ake amapangidwa ndi ma network atatu okhala ndi [SiO4] tetrahedron ngati gawo loyambira.Pakati pawo, maatomu okosijeni ndi silicon amalumikizidwa mwachindunji ndi ma covalent bond, ndipo mawonekedwe ake ndi amphamvu, chifukwa chake ali ndi katundu wokhazikika wamankhwala, kutentha kwambiri ndi kukana nyengo, etc.

Nano SiO2 makamaka imagwira ntchito ya anti-corrosion filler mu zokutira za epoxy.Kumbali imodzi, pakachitsulo woipa woipa akhoza bwino kudzaza yaying'ono ming'alu ndi pores kwaiye mu ndondomeko kuchiritsa epoxy utomoni, ndi kusintha kukana malowedwe ❖ kuyanika;Kumbali inayi, Magulu ogwira ntchito a nano-SiO2 ndi epoxy resin amatha kupanga mfundo zolumikizirana zakuthupi / zamankhwala kudzera pa adsorption kapena reaction, ndikuyambitsa zomangira za Si—O—Si ndi Si—O—C mu unyolo wa maselo kuti apange. mawonekedwe a maukonde atatu-dimensional kuti apititse patsogolo kumamatira kwa zokutira.Kuphatikiza apo, kuuma kwakukulu kwa nano-SiO2 kumatha kukulitsa kukana kwa zokutira, potero kumatalikitsa moyo wautumiki wa zokutira.