A Comprehensive Study on Silane Modification of Ldh Nanoparticles To Improve the Long-Term Durability of Pu Coating

In this study, using environmentally friendly (layered double hydroxide nanoparticles/silane) hybrid nanocomposite coatings were fabricated. zinc–aluminum layered double hydroxides contain nitrate anion synthesized by the co-precipitation method. the synthesized ldh was modified with aminopropyl triethoxy silane (aptes). then, all prepared materials were characterized by x-ray diffraction (xrd) and raman spectroscopy. the pristine and aptes-treated particles were embedded into a pu matrix and then exposed to a quv chamber for 1000h. the weathering stability was analyzed by color measurements, roughness, and contact angle tests. results showed that ldh-si-3 had the lowest color change among other coatings after 1000h. also, the roughness variations revealed that while other samples experienced an increased roughness, ldh-si-3 maintained its initial smoothness, confirming its highest weathering stability. the changes of contact angle (ca) indicated that only ldh-si-1 was hydrophobic before exposure weathering. according to the results, the lowest decrease was observed with ldh/si-2 in ca in comparison with other coatings after uv.

A Comprehensive study on silane modification of LDH nanoparticles to improve the long-term durability of PU coating

In this study, using environmentally friendly (layered double hydroxide nanoparticles/silane) hybrid nanocomposite coatings were fabricated. Zinc–aluminum layered double hydroxides contain nitrate anion synthesized by the Co-precipitation method. The synthesized LDH was modified with aminopropyl triethoxy silane (APTES). Then, all prepared materials were characterized by X-ray diffraction (XRD) and RAMAN spectroscopy. The pristine and APTES-treated particles were embedded into a PU matrix and then exposed to a QUV chamber for 1000h. The weathering stability was analyzed by color measurements, roughness, and Contact angle tests. Results showed that LDH-Si-3 had the lowest color change among other coatings after 1000h. Also, the roughness variations revealed that while other samples experienced an increased roughness, LDH-Si-3 maintained its initial smoothness, confirming its highest weathering stability. The changes of contact angle (CA) indicated that only LDH-Si-1 was hydrophobic before exposure weathering. According to the results, the lowest decrease was observed with LDH/Si-2 in CA in comparison with other coatings after UV.