李航,于美燕,张新宇,韩晓梅,齐琦,陈守刚.三种不同导电填料对聚氨酯导电涂层应用性能的影响[J].表面技术,2019,48(10):148-156.
LI Hang,YU Mei-yan,ZHANG Xin-yu,HAN Xiao-mei,QI Qi,CHEN Shou-gang.Effects of Three Different Inorganic Fillers on Application Properties of Polyurethane Conductive Coatings[J].Surface Technology,2019,48(10):148-156 |
| 三种不同导电填料对聚氨酯导电涂层应用性能的影响 |
| Effects of Three Different Inorganic Fillers on Application Properties of Polyurethane Conductive Coatings |
| 投稿时间：2019-01-07 修订日期：2019-10-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.10.018 |
| 中文关键词: 导电性能 无机填料 助剂 电阻 断裂拉伸强度 拉断伸长率 耐热性能 |
| 英文关键词:electrical conductivity inorganic filler auxiliary electrical resistance tensile strength at break elongation at break heat resistance |
| 基金项目:国家自然科学基金（U1806223） |
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| Author | Institution |
| LI Hang | College of Materials Science and Engineering, Ocean University of China, Qingdao 266071, China |
| YU Mei-yan | College of Materials Science and Engineering, Ocean University of China, Qingdao 266071, China |
| ZHANG Xin-yu | College of Materials Science and Engineering, Ocean University of China, Qingdao 266071, China |
| HAN Xiao-mei | College of Materials Science and Engineering, Ocean University of China, Qingdao 266071, China |
| QI Qi | College of Materials Science and Engineering, Ocean University of China, Qingdao 266071, China |
| CHEN Shou-gang | College of Materials Science and Engineering, Ocean University of China, Qingdao 266071, China |
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| 中文摘要: |
| 目的 筛选出对聚氨酯涂层导电性能改善最佳的导电填料和助剂。方法 使用三种不同的无机导电填料—微米级ITO、微米级导电云母和导电钛白粉，用不同的分散剂DISPERBYK-P104S、DISPERBYK- 163、DISPERBYK-2001对三种无机填料分别进行分散处理改性，选出对改性填料分散性最好的助剂，然后研究用该助剂改性的填料对聚氨酯树脂涂层导电性、力学性能、耐热性能等应用性能的影响，最终选出最好的导电填料。结果 利用沉降试验，筛选出了提高填料分散性能最好的助剂为DISPERBYK-P104S。通过测试涂层的导电性能、耐腐蚀、力学性能和耐热性能发现，用助剂DISPERBYK-P104S改性过的导电钛白粉掺入聚氨酯树脂涂层后，所有性能均优于其余填料掺入的涂层。涂层的电阻在室温下最小，为10.84 MΩ，而且在100 ℃加热2 h后，电阻仍然只有24.53 MΩ。水接触角（WCA）方面，该涂层初始时接触角为107°，在3.5% NaCl溶液中浸泡400 h后，水接触角仍能达到90°以上。涂层在3.5% NaCl溶液中浸泡800 h后，附着力仍然在2.1 MPa以上。该涂层拉伸强度为16.53 MPa，拉断伸长率为650%，具有较好的弹性和力学强度。同时，在300 ℃下烧蚀三次后（每次15 min），该涂层的表面仍然保持平整。结论 当导电填料为用DISPERBYK-P104S改性过的导电钛白粉时，聚氨酯树脂涂层的表面电阻在100 ℃以下均介于0.5~25 MΩ之间，而且该导电涂料的其他应用性能为最佳。 |
| 英文摘要: |
| The paper aims to select the best conductive filler and additive which can improve the conductivity properties of polyurethane coatings. Three kinds of inorganic conductive fillers: micron-sized ITO, micron-sized conductive mica and conductive titanium dioxide, were modified by three common additives: DISPERBYK-P104S, DISPERBYK-163, DISPERBYK- 2001, respectively, to select the best additive to improve the dispersion of filler, so as to study the effects of fillers modified by the additive on the conductivity, anti-corrosion, mechanical properties and heat resistance properties of polyurethane resin coatings. The best conductive material was selected finally. Based on sedimentation test, the additive of the best dispersibility was DISPERBYK-P104S. The electrical conductivity, corrosion resistance, mechanical properties and heat resistance of the coatings were tested to judge the environmental suitability. It showed that the polyurethane resin coating with modified conductive titanium dioxide obtained the best capabilities. The resistance of the coating had the minimal value of 10.84 MΩ at room temperature, and the resistance was only 24.53 MΩ when the coating was heated at 100 ℃ for 2 h. As for water contact angle (WCA), the initial contact angle of the coating was 107°, and the WCA of the coating still reached 90° after being immersed in 3.5% NaCl solution for 400 hours. The adhesion of the coating was still above 2.1 MPa after being immersed in 3.5% NaCl solution for 800 hours. The tensile strength of the coating was 16.53 MPa, its elongation at break was 650%, which proved that the coating had good elasticity and mechanical strength. At the same time, after ablation at 300 ℃ for 3 times (15 min per time), the surface of the coating remained smooth. The test results show that when the conductive filler was conductive titanium dioxide modified by DISPERBYK-P104S, the surface resistance of polyurethane resin coating is between 0.5~25 MΩ at the temperature below 100 ℃, and the conductive coating obtains the best performances in other aspects. |
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