【摘要】：船舶與海洋平臺等海洋結(jié)構(gòu)物在海洋環(huán)境中工作時,難免受到腐蝕及海洋污損物的附著。海洋生物附著一方面會影響結(jié)構(gòu)物的正常工作,增加上塢維護費用;另一方面會使自重增加,航行時摩擦阻力顯著提高,增加燃油費用。通過涂覆仿生疏水復(fù)合涂層可以有效地抑制腐蝕及生物污損附著,且具備良好的減阻性能。仿生疏水復(fù)合涂層的制備主要有兩點:一是低表面能;二是微觀粗糙結(jié)構(gòu)。因此,本文工作主要分為以下三部分:(1)CNT-OH/氟硅樹脂仿生疏水復(fù)合涂層的制備及研究以氟硅樹脂作為低表面能成膜物,以碳納米管(CNT)為納米填料來構(gòu)建微觀粗糙結(jié)構(gòu),通過對碳納米管種類、含量的研究制備具備一定疏水性的CNTOH/氟硅樹脂仿生疏水復(fù)合涂層。復(fù)合涂層的接觸角、滾動角及表面能分別達到121°、21°、4.28m N/m;且具有一定耐鹽霧腐蝕和疏水穩(wěn)定性,在25d鹽水浸泡試驗后,復(fù)合涂層的接觸角仍大于95°,吸水率為0.59%。其物理性能優(yōu)良,鉛筆硬度為5H,附著力為0級,且在320℃以下時具有較好的耐熱穩(wěn)定性。(2)CNT-OH/改性硅溶膠仿生疏水復(fù)合涂層的制備及研究利用正硅酸乙酯水解-凝膠法制備硅溶膠,并添加硅烷偶聯(lián)劑六甲基二硅胺(HMDS)進行改性,制備得到了具備一定疏水性能的改性硅溶膠。將改性硅溶膠、CNT-OH、水及少量的丙烯酸樹脂球磨機混合處理,噴涂后固化形成復(fù)合涂層。選用HMDS和1H,1H,2H,2H-全氟癸基三乙氧基硅烷(FTES)作為表面改性劑,制備得到CNT-OH/改性硅溶膠仿生疏水復(fù)合涂層。仿生復(fù)合涂層疏水自清潔性能優(yōu)異,接觸角/滾動角分別為145°/15°,表面能僅有0.595m N/m。25d鹽水浸泡試驗后,復(fù)合涂層的接觸角仍大于122°,吸水率為0.37%。復(fù)合涂層具有良好的物理性能,其鉛筆硬度為5H,附著力為0級,且在1000℃以下時具有良好的耐熱穩(wěn)定性,失重率僅有12%。制備最佳工藝條件為:硅溶膠:CNTOH=20:1,丙烯酸添加量為硅溶膠的30%,選用FTES作為表面改性劑,添加量0.8g(10ml乙醇中)、表面改性時間為2h。(3)平板阻力測試系統(tǒng)設(shè)計及仿生疏水復(fù)合涂層減阻性能研究自行設(shè)計小量程平板阻力測試系統(tǒng),并在不同流速下進行了幾種仿生疏水復(fù)合涂層的阻力性能測試。首先通過對阻力測試系統(tǒng)的標(biāo)定,分析試驗架平衡度和試驗板重量對數(shù)據(jù)的重復(fù)性和穩(wěn)定性的影響,并得到試驗板受力與應(yīng)變片的應(yīng)變之間的線性關(guān)系,斜率為8.9227。隨后對不同復(fù)合涂層進行阻力性能測試,相對于粗糙平板,市場購買的環(huán)氧漆涂層減阻率為5.2%,CNT-OH/氟硅樹脂復(fù)合涂層減阻率為6.8%,CNT-OH/改性硅溶膠復(fù)合涂層減阻率為11.5%。復(fù)合涂層的減阻機理是涂層的低表面能性能及其表面存在微觀粗糙結(jié)構(gòu)共同作用的結(jié)果。
[Abstract]:When ships and offshore structures work in the marine environment, corrosion and fouling are inevitable. On the one hand, the attachment of marine organisms will affect the normal work of the structure and increase the cost of docking maintenance; on the other hand, it will increase the weight of the body, increase the friction resistance during navigation, and increase the fuel cost. The bionic hydrophobic composite coating can effectively inhibit corrosion and fouling adhesion and has good drag reduction performance. The preparation of bionic hydrophobic composite coating has two main points: one is low surface energy, the other is microstructure. Therefore, the work of this paper is divided into the following three parts: (1) preparation and study of CNT-OH/ fluorosilicone bionic hydrophobic composite coating with fluorosilicone resin as low surface energy film. The microstructure of carbon nanotubes (CNT) was constructed by using (CNT) as nano-filler. The hydrophobic composite coating of CNTOH/ fluorosilicone resin with certain hydrophobicity was prepared by studying the types and contents of CNTs. The contact angle, rolling angle and surface energy of the composite coating are 121 擄, 21 擄, 4.28 m / m respectively. After 25 days of salt water immersion test, the contact angle of the composite coating is still more than 95 擄, and the water absorption is 0.59%. Its physical properties are excellent, the hardness of pencil is 5H, the adhesion is 0, And it has good thermal stability at 320 鈩，

本文編號：2422419