Asif Afzal Haq, Mahajan Mahendra S, Sreeharsha Nagaraja, Gite Vikas V, Al-Dhubiab Bandar E, Kaliyadan Feroze, Nanjappa Shivakumar H, Meravanige Girish, Aleyadhy Dalal Mishary
Department of Pharmacy Practice, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia.
Department of Polymer Chemistry, School of Chemical Sciences, Kavayitri Bahinabai Chaudhari North Maharashtra University, Jalgaon 425001, MS, India.
Materials (Basel). 2022 Mar 20;15(6):2308. doi: 10.3390/ma15062308.
The present investigation demonstrates renewable cardanol-based polyol for the formulation of nanocomposite polyurethane (PU) coatings. The functional and structural features of cardanol polyol and nanoparticles were studied using FT-IR and 1H NMR spectroscopic techniques. The magnetic hydroxyapatite nanoparticles (MHAPs) were dispersed 1-5% in PU formulations to develop nanocomposite anticorrosive coatings. An increase in the strength of MHAP increased the anticorrosive performance as examined by immersion and electrochemical methods. The nanocomposite PU coatings showed good coating properties, viz., gloss, pencil hardness, flexibility, cross-cut adhesion, and chemical resistance. Additionally, the coatings were also studied for surface morphology, wetting, and thermal properties by scanning electron microscope (SEM), contact angle, and thermogravimetric analysis (TGA), respectively. The hydrophobic nature of PU coatings increased by the addition of MHAP, and an optimum result (105°) was observed in 3% loading. The developed coatings revealed its hydrophobic nature with excellent anticorrosive performance.
本研究展示了用于制备纳米复合聚氨酯（PU）涂层的可再生腰果酚基多元醇。使用傅里叶变换红外光谱（FT-IR）和核磁共振氢谱（1H NMR）光谱技术研究了腰果酚多元醇和纳米颗粒的功能及结构特征。将磁性羟基磷灰石纳米颗粒（MHAPs）以1%-5%的比例分散在PU配方中，以制备纳米复合防腐涂层。通过浸泡和电化学方法检测发现，MHAP强度的增加提高了防腐性能。纳米复合PU涂层表现出良好的涂层性能，即光泽度、铅笔硬度、柔韧性、划格附着力和耐化学性。此外，还分别通过扫描电子显微镜（SEM）、接触角和热重分析（TGA）对涂层的表面形态、润湿性和热性能进行了研究。添加MHAP提高了PU涂层的疏水性，在3%的负载量下观察到了最佳结果（105°）。所制备的涂层显示出疏水性，并具有优异的防腐性能。
