發(fā)布時(shí)間：2018-06-25 12:01

  本文選題：納米粒子 + Y2O3/CeO2復(fù)合�。� 參考：《內(nèi)蒙古科技大學(xué)》2015年碩士論文

【摘要】：環(huán)氧涂料是應(yīng)用最多的一種防腐涂料，但是它也有質(zhì)脆、易老化、耐蝕性能較差等缺點(diǎn)，因此對其進(jìn)行改性以研制高性能的防腐涂層是現(xiàn)在研究的一個(gè)熱點(diǎn)。由于稀土的氧化物納米粒子具有非常好的耐熱、耐酸堿、耐腐蝕等獨(dú)特性能，并且價(jià)格實(shí)惠(如Y2O3和CeO2等)，用硅烷偶聯(lián)劑對納米Y2O3和Y2O3/CeO2復(fù)合材料進(jìn)行改性，，加入到環(huán)氧樹脂中，能提高其耐腐蝕性。 由于片層狀納米粒子有扁平結(jié)構(gòu)，其表面能降低，經(jīng)過硅烷偶聯(lián)劑處理之后，能很好的分散在環(huán)氧樹脂涂料中，制備鋼板上防腐涂層，能阻止外部腐蝕性介質(zhì)侵蝕，減小氧通過防腐涂層的速度，能防止鋼板基體的氧化。因此，本文研究的重點(diǎn)是通過制備片層狀納米Y2O3和Y2O3/CeO2復(fù)合粒子，并制作環(huán)氧樹脂在鋼板上的防腐涂層。具體研究如下: 首先，制備片層狀Y2O3納米粒子，采用半開放體系的尿素均相沉淀法，通過改變制備工藝，得到Y(jié)2O3納米粒子的前驅(qū)體，選擇不同的燒結(jié)條件以制得片層狀納米Y2O3，從而確定其制備工藝為150℃溫度下反應(yīng)5h，在600℃下燒結(jié)3h。實(shí)驗(yàn)結(jié)果表明：反應(yīng)溫度越高，納米片層狀粒子越容易生成；隨著燒結(jié)的溫度的變低，片層狀納米粒子也更明顯，堆積也越疏松。 然后，制備片層狀Y2O3和CeO2復(fù)合納米粒子，采用半開放體系的尿素均相沉淀法，通過改變制備工藝，得到Y(jié)2O3和CeO2復(fù)合納米粒子的前驅(qū)體，選擇不同的燒結(jié)條件以制得片層狀納米Y2O3/CeO2復(fù)合納米粒子，從而確定其制備工藝為在150℃溫度下反應(yīng)5h，600℃下燒結(jié)3h。實(shí)驗(yàn)結(jié)果表明：鈰的量越大，片層狀越不明顯，顆粒狀也越多。這與釔和鈰離子的空間結(jié)構(gòu)有關(guān)；反應(yīng)溫度越高，片層狀越明顯，堆積也越疏松；燒結(jié)溫度越高，片層狀越不明顯。 最后，制備防腐涂層。通過用硅烷偶聯(lián)劑-560對Y2O3、CeO2和Y2O3/CeO2復(fù)合納米粒子進(jìn)行包覆改性，然后分別添加到環(huán)氧清漆防腐涂料中，制備304鋼板上的防腐涂層。通過對其電化學(xué)阻抗性能的測試，并對添加的不同的納米粒子進(jìn)行對比分析，得出添加1:1的片層狀納米Y2O3/CeO2復(fù)合粒子的環(huán)氧樹脂涂料的模值高于其他添加粒子。經(jīng)過30天的模擬腐蝕鹽溶液浸泡，空白板和純環(huán)氧清漆的涂層發(fā)生腐蝕，涂層腐蝕嚴(yán)重；添加稀土成分的3種環(huán)氧漆涂層基本無腐蝕。說明在環(huán)氧樹脂防腐漆中添加納米稀土氧化物能提高其防腐性能。
[Abstract]:Epoxy coating is one of the most widely used anticorrosive coatings, but it also has the disadvantages of brittle, easy aging and poor corrosion resistance. Therefore, it is a hot research topic to modify epoxy coatings to develop high performance anticorrosive coatings. Because rare earth oxide nanoparticles have very good heat resistance, acid and alkali resistance, corrosion resistance and so on, and the price is affordable (such as Y _ 2O _ 3 and CEO _ 2), Nano-Y _ 2O _ 3 and Y _ 2O _ 3 / CeO _ 2 composites are modified by silane coupling agent and added to epoxy resin. It can improve its corrosion resistance. Because the lamellar nanoparticles have flat structure and their surface energy is reduced, after silane coupling agent treatment, they can be well dispersed in epoxy resin coating, and can be used to prepare anticorrosive coating on steel plate, which can prevent external corrosive medium from eroding. By reducing the speed of oxygen passing through the anticorrosive coating, the oxidation of the steel substrate can be prevented. Therefore, the focus of this study is to prepare laminated nano-Y _ 2O _ 3 and Y _ 2O _ 3 / CeO _ 2 composite particles and to prepare epoxy resin anticorrosive coating on steel plate. The specific research is as follows: firstly, the precursor of Y _ 2O _ 3 nanoparticles was obtained by changing the preparation process by using semi-open urea homogeneous precipitation method to prepare layered Y _ 2O _ 3 nanocrystalline particles. Different sintering conditions were selected to prepare lamellar nanometer Y _ 2O _ 3, and the preparation process was determined as follows: reaction at 150 鈩

本文編號(hào)：2065838