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Nanodiamond Reinforced Poly(dimethylsiloxane)-Based Polyurea with Self-Healing Ability for Fouling Release Coating
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-06-23 , DOI: 10.1021/acsapm.0c00356 Qingyi Xie 1 , Chao Liu 2 , Xiaobin Lin 1 , Chunfeng Ma 1 , Guangzhao Zhang 1
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-06-23 , DOI: 10.1021/acsapm.0c00356 Qingyi Xie 1 , Chao Liu 2 , Xiaobin Lin 1 , Chunfeng Ma 1 , Guangzhao Zhang 1
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Silicone-based fouling-release coatings (FRCs) have received increasing interest because they are environmentally friendly. However, the coatings with poor mechanical properties and low adhesion to substrate are difficult to repair after damage, which limits their applications. In this study, poly(dimethylsiloxane)-based polyurea (PDMS-PUa) was modified by adding nanodiamond with perfluoroalkyl attached on the surface. The modified PDMS-PUa coating has high water contact angle (124°) and low surface energy (18 mJ m–2) due to the presence of the self-enriched perfluoro groups and polysiloxane on the surface. The introduction of fluorinated nanodiaomd improves the tensile strength of PDMS-PUa from 1.2 to 1.6 MPa and the adhesion strength from 1.5 to 2.1 MPa. Particularly, the modified PDMS-PUa exhibits self-healing performance at room temperature because of the hydrogen bonding between urea groups. Marine field tests show that the coating can keep fouling-release ability after immersion in natural seawater for four months.
中文翻译：
具有自修复能力的纳米金刚石增强聚二甲基硅氧烷基聚脲，用于污垢释放涂层
基于有机硅的防污涂料（FRC）环保，因此受到越来越多的关注。然而，具有差的机械性能和对基材的低粘附性的涂层在损坏后难以修复，这限制了它们的应用。在这项研究中，聚二甲基硅氧烷基聚脲（PDMS-PUa）通过在表面附着全氟烷基的纳米金刚石进行改性。改良的PDMS-PUa涂层具有高的水接触角（124°）和低的表面能（18 mJ m –2）是由于表面上存在自富全氟基团和聚硅氧烷。氟化纳米金刚石的引入将PDMS-PUa的拉伸强度从1.2 MPa提高到1.6 MPa，将粘合强度从1.5 MPa提高到2.1 MPa。特别地，由于脲基团之间的氢键，改性的PDMS-PUa在室温下表现出自修复性能。海洋现场测试表明，该涂料在天然海水中浸泡四个月后，可以保持污垢释放能力。
更新日期：2020-08-14
中文翻译：
具有自修复能力的纳米金刚石增强聚二甲基硅氧烷基聚脲，用于污垢释放涂层
基于有机硅的防污涂料（FRC）环保，因此受到越来越多的关注。然而，具有差的机械性能和对基材的低粘附性的涂层在损坏后难以修复，这限制了它们的应用。在这项研究中，聚二甲基硅氧烷基聚脲（PDMS-PUa）通过在表面附着全氟烷基的纳米金刚石进行改性。改良的PDMS-PUa涂层具有高的水接触角（124°）和低的表面能（18 mJ m –2）是由于表面上存在自富全氟基团和聚硅氧烷。氟化纳米金刚石的引入将PDMS-PUa的拉伸强度从1.2 MPa提高到1.6 MPa，将粘合强度从1.5 MPa提高到2.1 MPa。特别地，由于脲基团之间的氢键，改性的PDMS-PUa在室温下表现出自修复性能。海洋现场测试表明，该涂料在天然海水中浸泡四个月后，可以保持污垢释放能力。
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