I-epoxy iyaziwa kumntu wonke.Olu hlobo lwezinto eziphilayo lukwabizwa ngokuba yi-resin eyenziweyo, i-resin glue, njl. Luhlobo olubaluleke kakhulu lweplastiki ye-thermosetting.Ngenxa yenani elikhulu lamaqela asebenzayo kunye ne-polar, iamolekyu ze-epoxy resin zinokudibaniswa kunye nokunyangwa kunye neentlobo ezahlukeneyo zokuphilisa, kunye neempawu ezahlukeneyo zinokuthi zenziwe ngokudibanisa izongezo ezahlukeneyo.

Njenge-thermosetting resin, i-epoxy resin ineenzuzo zeempawu ezilungileyo zomzimba, ukugquma kombane, ukunamathela okulungileyo, ukuxhathisa kwe-alkali, ukuxhathisa kwe-abrasion, ukuveliswa okugqwesileyo, ukuzinza kunye neendleko eziphantsi.Yenye yezona zinto zibanzi ezisisiseko ezisetyenziswa kwizinto zepolymer.

Okwangoku, i-epoxy resin isetyenziswa kakhulu kwishishini lokugquma, kwaye i-coating eyenziwe ngayo njenge-substrate ibizwa ngokuba yi-epoxy resin coating.Kuxelwe ukuba i-epoxy resin yokwambathisa yimathiriyeli engqindilili ekhuselayo enokuthi isetyenziswe ukugubungela nantoni na, ukusuka kwimigangatho, izixhobo zombane ezinkulu ukuya kwiimveliso ezincinci zombane, ukuzikhusela ekonakaleni okanye ekunxityweni.Ukongeza kokuhlala ixesha elide, i-epoxy resin coatings iyakwazi ukumelana nezinto ezifana nomhlwa kunye nokubola kweekhemikhali, ngoko ke ziyathandwa kumashishini amaninzi kunye nokusetyenziswa.

Imfihlelo yokuqina kwe-epoxy coating

Kuba i-epoxy resin ikwicandelo lepolymer elulwelo, ifuna uncedo lweearhente zokunyanga, izongezo kunye neepigments ukuze zifakwe kwi-epoxy ekwazi ukumelana nokubola.Phakathi kwazo, ii-nano oxides zihlala zongezwa njengeebala kunye nezihluzi kwiingubo ze-epoxy resin, kwaye abameli abaqhelekileyo yi-silica (SiO2), i-titanium dioxide (TiO2), i-aluminium oxide (Al2O3), i-zinc oxide (ZnO), kunye ne-oxides yomhlaba enqabileyo.Ngobukhulu obukhethekileyo kunye nokwakheka kwazo, ezi nano oxides zibonisa iipropathi ezininzi ezikhethekileyo zomzimba kunye neekhemikhali, ezinokuphucula kakhulu iipropathi zoomatshini kunye ne-anti-corrosion yengubo.

Zimbini iindlela eziphambili zeeoksidi ze-nano zamasuntswana ukomeleza ukusebenza kokhuselo lweengubo ze-epoxy:

Okokuqala, kunye nobukhulu bayo obuncinci, inokugcwalisa ngokufanelekileyo i-micro-cracks kunye ne-pores eyenziwe yi-shrinkage yendawo ngexesha lenkqubo yokunyanga i-epoxy resin, ukunciphisa indlela yokusabalalisa i-corrosive media, kunye nokuphucula ukukhusela kunye nokusebenza kokukhusela kwengubo;

Okwesibini kukusebenzisa ubunzima obuphezulu beengqungquthela ze-oxide ukwandisa ubunzima be-epoxy resin, ngaloo ndlela kuphuculwe iimpawu zomatshini zokugqoka.

Ukongeza, ukongeza inani elifanelekileyo lee-nano oxide particles nako kunokwandisa amandla okudibanisa i-interface ye-epoxy coating kunye nokwandisa ubomi benkonzo yokugqoka.

Indima yenano silicaumgubo:

Phakathi kwezi oxides nanopowders, nano silicon dioxide (SiO2) luhlobo lobukho obuphezulu.I-Silica nano yi-inorganic non-metallic material enokumelana nobushushu obugqwesileyo kunye nokumelana ne-oxidation.Ubume bayo be-molekyuli bubume bothungelwano olunamacala amathathu kunye ne- [SiO4] i-tetrahedron njengesiseko seyunithi yesakhiwo.Phakathi kwazo, i-oksijini kunye ne-athomu ye-silicon zidibaniswe ngokuthe ngqo ngamabhondi e-covalent, kwaye isakhiwo sinamandla, ngoko sineempawu ezizinzileyo zeekhemikhali, ukushisa okuphezulu kunye nokuchasana kwemozulu, njl.

I-Nano SiO2 ikakhulu idlala indima ye-anti-corrosion filler kwi-epoxy coating.Ngakolunye uhlangothi, i-silicon dioxide inokugcwalisa ngokufanelekileyo i-micro-cracks kunye ne-pores eyenziwe kwinkqubo yokunyanga ye-epoxy resin, kunye nokuphucula ukunyanzeliswa kokungena kwengubo;ngakolunye uhlangothi, Amaqela asebenzayo e-nano-SiO2 kunye ne-epoxy resin angenza i-physical / chemical cross-linking points ngokusebenzisa i-adsorption okanye ukuphendula, kwaye uqalise i-Si-O-Si kunye ne-Si-O-C kwiibhondi kwi-molecular chain ukuze zenze. ubume bothungelwano olunemigangatho emithathu ukuphucula ukunamathela kokutyabeka.Ukongeza, ubunzima obuphezulu be-nano-SiO2 bunokuphucula kakhulu ukuxhathisa kokunxiba kwengubo, ngaloo ndlela kwandisa ubomi benkonzo yokugquma.