Epoxy yog paub rau txhua leej txhua tus.Cov organic teeb meem no tseem hu ua cov khoom siv dag zog, cov kua nplaum nplaum, thiab lwm yam. Nws yog ib qho tseem ceeb heev ntawm thermosetting yas.Vim muaj coob tus neeg nquag thiab polar pawg, epoxy resin molecules tuaj yeem sib txuas thiab kho nrog ntau hom tshuaj tua kab mob, thiab cov khoom sib txawv tuaj yeem tsim los ntawm kev ntxiv ntau yam additives.

Raws li cov thermosetting resin, epoxy resin muaj qhov zoo ntawm lub cev zoo, hluav taws xob rwb thaiv tsev, zoo adhesion, alkali tsis kam, abrasion tsis kam, zoo heev manufacturability, stability thiab tsawg tus nqi.Nws yog ib qho ntawm cov khoom siv dav dav siv hauv cov ntaub ntawv polymer.

Tam sim no, epoxy resin feem ntau yog siv rau hauv kev lag luam txheej, thiab cov txheej txheem ua nrog nws li substrate hu ua epoxy resin txheej.Nws tau tshaj tawm tias epoxy resin txheej yog cov khoom siv tiv thaiv tuab uas tuaj yeem siv los npog txhua yam, los ntawm cov plag tsev, cov khoom siv hluav taws xob loj rau cov khoom siv hluav taws xob me me, los tiv thaiv lawv ntawm kev puas tsuaj lossis hnav.Ntxiv rau qhov ua tau zoo heev, epoxy resin coatings feem ntau kuj tiv taus cov khoom xws li xeb thiab tshuaj lom neeg corrosion, yog li lawv tau nrov hauv ntau qhov kev lag luam thiab siv.

Lub secrets ntawm epoxy txheej durability

Txij li thaum epoxy resin belongs rau qeb ntawm cov kua polymer, nws xav tau kev pab los ntawm curing agents, additives thiab pigments incarnate rau hauv ib tug corrosion-resistant epoxy txheej.Ntawm lawv, nano oxides feem ntau ntxiv raws li cov xim thiab muab tso rau epoxy resin coatings, thiab cov neeg sawv cev raug yog silica (SiO2), titanium dioxide (TiO2), txhuas oxide (Al2O3), zinc oxide (ZnO), thiab tsis tshua muaj ntiaj teb oxides.Nrog rau lawv qhov tshwj xeeb loj thiab cov qauv, cov nano oxides nthuav tawm ntau lub cev thiab tshuaj lom neeg tshwj xeeb, uas tuaj yeem txhim kho cov khoom siv kho tshuab thiab tiv thaiv corrosion ntawm txheej.

Muaj ob lub ntsiab mechanisms rau oxides nano hais los txhim khu kev tiv thaiv kev ua tau zoo ntawm epoxy txheej:

Ua ntej, nrog nws tus kheej me me, nws tuaj yeem ua tiav cov micro-cracks thiab pores tsim los ntawm lub zos shrinkage thaum lub sij hawm kho cov txheej txheem ntawm epoxy resin, txo txoj kev diffusion ntawm corrosive xov xwm, thiab txhim khu lub shielding thiab tiv thaiv kev ua tau zoo ntawm txheej;

Qhov thib ob yog siv lub siab hardness ntawm oxide hais los ua kom lub hardness ntawm epoxy resin, yog li txhim kho cov neeg kho tshuab zog ntawm txheej.

Tsis tas li ntawd, ntxiv qhov tsim nyog ntawm nano oxide hais tuaj yeem ua rau muaj kev sib txuas ntawm lub zog ntawm epoxy txheej thiab txuas ntxiv lub neej kev pab cuam ntawm txheej.

Lub luag haujlwm ntawmnano silicahmoov:

Ntawm cov oxides nanopowders, nano silicon dioxide (SiO2) yog hom muaj siab.Silica nano yog ib qho khoom siv tsis muaj hlau tsis muaj hlau nrog cov cua sov ua haujlwm zoo thiab oxidation tsis kam.Nws lub xeev molecular yog peb-dimensional network qauv nrog [SiO4] tetrahedron raws li lub hauv paus structural unit.Ntawm lawv, cov pa oxygen thiab silicon atoms txuas ncaj qha los ntawm covalent daim ntawv cog lus, thiab cov qauv muaj zog, yog li nws muaj cov tshuaj lom neeg ruaj khov, zoo heev kub thiab huab cua tsis kam, thiab lwm yam.

Nano SiO2 tsuas yog ua lub luag haujlwm ntawm kev tiv thaiv corrosion hauv epoxy txheej.Ntawm qhov tod tes, silicon dioxide tuaj yeem ua tau zoo rau cov microcracks thiab cov pores tsim nyob rau hauv cov txheej txheem kho ntawm epoxy resin, thiab txhim kho kev nkag mus ntawm cov txheej txheem;Ntawm qhov tod tes, , Cov pab pawg ua haujlwm ntawm nano-SiO2 thiab epoxy resin tuaj yeem tsim lub cev / tshuaj sib txuas cov ntsiab lus los ntawm adsorption lossis cov tshuaj tiv thaiv, thiab qhia Si-O-Si thiab Si-O-C bonds rau hauv cov saw molecular los tsim. peb-dimensional network qauv los txhim kho txheej adhesion.Tsis tas li ntawd, lub siab hardness ntawm nano-SiO2 tuaj yeem txhim kho qhov hnav tsis kam ntawm txheej txheej, yog li ua kom lub neej ntev ntawm cov txheej txheej.