Verma Shatakshi, Mohanty Smita, Nayak S K
Central Institute of Plastics Engineering and Technology (CIPET), T.V.K. Industrial Estate, Guindy, Chennai, Tamil Nadu - 600032, India.
Soft Matter. 2020 Feb 7;16(5):1211-1226. doi: 10.1039/c9sm01952a. Epub 2020 Jan 3.
Epoxy-polydimethylsiloxane-graphene oxide (EPG) nanocomposite coatings were successfully developed by loading different wt% of graphene oxide nanosheets (GNs) into an epoxy-hydroxy-terminated-polydimethylsiloxane (EP-hPD) matrix via a facile in situ preparation technique. The inclusion of GNs into EPN led to an increase in modulus of elasticity and tensile strength up to 1570.46 MPa and 31.54 MPa, respectively, in the case of 1 wt% loading of GNs in the EP-hPD matrix. Also, an increase in the water contact angle from 90.1° to 115.2°, 104.5° and 101.7° was discerned at 1, 3 and 5 wt% loadings of GNs respectively. Taber abrasion results demonstrated a decrease in abrasion loss by 33.3% at 1 wt% loading of GNs in comparison to the unreinforced coating. An improvement in the glass transition temperature (T) was observed from 63.5 °C for the neat sample to 77.6 °C, 76.3 °C and 71.6 °C for the 1, 3 and 5 wt% EPG nanocomposites, respectively. An inevitable enhancement in the properties of the nanocomposites was affirmed due to the synergistic effect of GNs dispersed within the EP-hPD blend matrix. The prominent findings of this work include a minimum corrosion rate of 0.73 × 10 mm per year and upgradation in the antifouling performance of the nanocomposite coatings in comparison to the neat coating.
通过一种简便的原位制备技术，将不同重量百分比的氧化石墨烯纳米片（GNs）负载到环氧-羟基封端的聚二甲基硅氧烷（EP-hPD）基体中，成功制备了环氧-聚二甲基硅氧烷-氧化石墨烯（EPG）纳米复合涂层。在EP-hPD基体中负载1 wt%的GNs时，将GNs加入EPN中分别使弹性模量和拉伸强度提高到1570.46 MPa和31.54 MPa。此外，在分别负载1 wt%、3 wt%和5 wt%的GNs时，水接触角从90.1°分别增加到115.2°、104.5°和101.7°。泰伯磨耗结果表明，与未增强涂层相比，在负载1 wt%的GNs时磨耗损失降低了33.3%。玻璃化转变温度（T）从纯样品的63.5 °C分别提高到1 wt%、3 wt%和5 wt%的EPG纳米复合材料的77.6 °C、76.3 °C和71.6 °C。由于分散在EP-hPD共混基体中的GNs的协同作用，纳米复合材料的性能得到了必然的增强。这项工作的突出发现包括最低腐蚀速率为每年0.73×10毫米，与纯涂层相比，纳米复合涂层的防污性能有所提升。
