發(fā)布時(shí)間：2018-12-26 11:26

【摘要】：疏水表面是指與水的接觸角大于90°的表面,超疏水表面則是指與水的接觸角大于150°、滾動(dòng)角小于10°的表面。超疏水表面在自清潔、防水、防冰等方面具有廣闊的應(yīng)用前景。提高耐磨性是超疏水表面工程的研究熱點(diǎn)和難點(diǎn)。針對(duì)大型風(fēng)電葉片、飛機(jī)機(jī)翼等大型復(fù)合材料結(jié)構(gòu)抗冰實(shí)際需求,研究耐磨性能好的超疏水涂層具有很重要的應(yīng)用價(jià)值。本文采用耐磨性好、具有本征疏水特性的二氧化鈰微納粒子和氟硅丙改性聚氨酯樹(shù)脂,設(shè)計(jì)新型超疏水涂層配方,采用工藝簡(jiǎn)單、條件易控的流延法和噴涂法在玻纖/環(huán)氧樹(shù)脂復(fù)合材料基板上制備超疏水涂層。配方設(shè)計(jì)主要考慮不同粒徑納米粒子及其組合與樹(shù)脂和稀釋劑的配比優(yōu)化問(wèn)題。重點(diǎn)研究了10μm、1μm和100nm粒徑的CeO_2粒子的不同含量以及微米和納米粒子組合對(duì)超疏水涂層疏水性和耐磨性的影響,分析了超疏水涂層的微觀結(jié)構(gòu)特點(diǎn),優(yōu)化了超疏水涂層配方。首先,將不同粒徑的CeO_2粒子分別與氟硅丙改性聚氨酯樹(shù)脂和稀釋劑按照不同的配比均勻混合,制成高分子復(fù)合涂料。采用流延法和噴涂法在基板上制備超疏水涂層,測(cè)試水珠接觸角,找出最優(yōu)配比。研究表明,噴涂法制備的復(fù)合涂層的接觸角為148.88°,流延法制備的復(fù)合涂層的接觸角為145.41°,均顯示出良好的疏水性能。其次,在最優(yōu)配比的基礎(chǔ)上研究微米納米組合粒徑對(duì)超疏水涂層性能的影響。進(jìn)一步優(yōu)化涂層的超疏水性能之后,采用落沙法測(cè)試復(fù)合涂層的耐磨性。流延法制備的10μm粒子復(fù)合涂層的耐磨性最好,優(yōu)于使用噴涂法工藝和其他粒徑制備的復(fù)合涂層。最好的涂層配方為樹(shù)脂與粒子和稀釋劑之比為0.5:0.5:1.5。最后,采用掃描電鏡對(duì)不同配方、不同工藝制備的復(fù)合涂層表面微觀形貌進(jìn)行觀察與分析。所制備的復(fù)合涂層樣品表面均能構(gòu)筑微納二元結(jié)構(gòu),具有較好的疏水性能。復(fù)合涂層在經(jīng)過(guò)落沙沖擊磨損后,包覆在粒子外面的表層樹(shù)脂受到一定程度的破壞,粒子由樹(shù)脂團(tuán)里裸露出來(lái),反而更好的構(gòu)筑微納二元結(jié)構(gòu),使得疏水性能進(jìn)一步提升,涂層持續(xù)磨損后的接觸角一直保持在150°以上。研究進(jìn)一步發(fā)現(xiàn),只要涂層未被磨穿則一直保持良好的超疏水效果,這個(gè)發(fā)現(xiàn)有利于通過(guò)涂層厚度來(lái)調(diào)控超疏水涂層的耐磨能力。
[Abstract]:The hydrophobic surface refers to the surface whose contact angle with water is greater than 90 擄, while the superhydrophobic surface refers to the surface whose contact angle with water is greater than 150 擄and whose rolling angle is less than 10 擄. Superhydrophobic surface has a broad application prospect in self-cleaning, waterproof, ice-proof and so on. Improving wear resistance is a hot and difficult point in superhydrophobic surface engineering. In order to meet the practical requirements of ice resistance of large composite structures such as large wind power blades and aircraft wings, it is of great value to study super hydrophobic coatings with good wear resistance. In this paper, a new type of super hydrophobic coating formula was designed by using cerium oxide micro-nano particles and fluorosilicone-acrylic modified polyurethane resin with good wear resistance and intrinsic hydrophobic properties. Superhydrophobic coatings were prepared on glass fiber / epoxy composite substrates by flow casting and spraying. The formulation design mainly considers the optimization of the ratio of different particle size and its combination with resin and diluent. The effects of different contents of 10 渭 m 1 渭 m and 100nm particle size on the hydrophobicity and wear resistance of superhydrophobic coatings were studied, and the microstructure of superhydrophobic coatings was analyzed. The formulation of superhydrophobic coating was optimized. Firstly, polymer composite coatings were prepared by mixing CeO_2 particles of different particle sizes with fluorosilicone-acrylic modified polyurethane resin and diluent according to different ratios. The superhydrophobic coating was prepared on the substrate by the method of casting and spraying, and the contact angle of the water droplets was measured to find out the optimum ratio. The results show that the contact angle of the composite coating prepared by spraying method is 148.88 擄, and the contact angle of the composite coating prepared by casting method is 145.41 擄, which shows good hydrophobic properties. Secondly, the effect of micron and nano particle size on the properties of superhydrophobic coatings was studied on the basis of the optimal ratio. After the superhydrophobicity of the coating was optimized, the wear resistance of the composite coating was tested by sand drop method. The wear resistance of 10 渭 m particle composite coating prepared by casting method is the best, which is superior to that of the composite coating prepared by spraying process and other particle sizes. The best coating formula is the ratio of resin to particle and diluent to 0.5: 0.5: 1.5. Finally, SEM was used to observe and analyze the surface morphology of the composite coatings prepared with different formulations and different processes. The surface of the composite coating has good hydrophobic properties, and the micro-nano binary structure can be constructed on the surface of the composite coating. After the impact wear of the composite coating, the resin coated on the surface of the particles is destroyed to a certain extent, and the particles are exposed from the resin cluster. Instead, the micro-nano binary structure is better constructed, so that the hydrophobicity can be further enhanced. The contact angle of the coating remained above 150 擄after continuous wear. It is further found that as long as the coating is not worn through, the superhydrophobic effect will be maintained, which is helpful to regulate the wear resistance of the superhydrophobic coating through the thickness of the coating.
【學(xué)位授予單位】：國(guó)防科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB306

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳恒真;耿鐵;張霞;張平余;;超疏水表面研究進(jìn)展[J];化學(xué)研究;2013年04期

2 徐文華;張麗東;趙利;陳壽花;王麗;劉偉良;;耐久性超疏水表面研究進(jìn)展[J];化工進(jìn)展;2012年10期

3 李杰;張會(huì)臣;;超疏水表面制備技術(shù)的研究進(jìn)展[J];潤(rùn)滑與密封;2011年01期

4 范治平;魏增江;田冬;肖成龍;孫曉玲;陳承來(lái);劉偉良;;超疏水性材料表面的制備、應(yīng)用和相關(guān)理論研究的新進(jìn)展[J];高分子通報(bào);2010年11期

5 王萍;王仁芳;方文軍;;粗糙表面對(duì)神經(jīng)膠質(zhì)細(xì)胞三維立體形狀的影響[J];中國(guó)生物醫(yī)學(xué)工程學(xué)報(bào);2009年02期

6 黃月文;劉偉區(qū);羅廣建;;超疏水涂膜的研究進(jìn)展[J];高分子材料科學(xué)與工程;2008年11期

7 周明;鄭傲然;楊加宏;;復(fù)制模塑法制備超疏水表面及其應(yīng)用[J];物理化學(xué)學(xué)報(bào);2007年08期

8 段輝;汪厚植;趙雷;鄧承繼;顧華志;;氟化丙烯酸/二氧化硅雜化超疏水涂層的性能研究[J];涂料工業(yè);2006年12期

9 粟常紅;肖怡;崔U，

本文編號(hào)：2392055