Defect-structured Zn_aMg_bAl_c layered double hydroxides (d-Zn_aMg_bAl_c-LDHs) with varying Mg/Zn ratios have been prepared by modifying the surface of Zn_aMg_bAl_c-LDHs through a chemical etching method. The UV blocking properties of d-Zn_aMg_bAl_c-LDHs were significantly improved and d-Zn₄Al₂-LDH was added into asphalt to explore the potential anti-UV-aging application in asphalt. Research results show that 3 wt.% of d-Zn₄Al₂-LDH could significantly improve the anti-UV-aging ability of asphalt, resulting from oxygen vacancy defects produced on the surface of d-Zn₄Al₂-LDH. Specifically, these oxygen defects vacancy can adsorb the free radicals generated during asphalt aging process; therefore, it blocked the fragmentation of macromolecule chain in asphalt and postponed the aging process.

通过化学蚀刻修饰Zn _a Mg _b Al _c -LDHs的表面，制备了具有不同Mg/Zn比的缺陷结构Zn _a Mg _b Al _c层状双氢氧化物（d-Zn _a Mg _b Al _c -LDHs）方法。d-Zn _a Mg _b Al _c -LDHs的紫外线阻隔性能显着提高，将 d-Zn ₄ Al ₂ -LDH 添加到沥青中，探索了在沥青中潜在的抗紫外线老化应用。研究结果表明，3wt.%的d-Zn ₄ Al ₂由于d-Zn ₄ Al ₂ -LDH表面产生氧空位缺陷，-LDH 可以显着提高沥青的抗紫外线老化能力。具体来说，这些氧缺陷空位可以吸附沥青老化过程中产生的自由基；因此，它阻止了沥青中大分子链的断裂并延缓了老化过程。