The aim of this study is to explore a method for modifying waste brick powder (WBP) in order to reapply it to rubber products for effective resource recycling. Firstly, we use the auto polymerization of catechol/polyamine (CPA) on the surface of WBP to form a poly catechol/polyamine (PCPA) coating as an intermediate reaction platform. And then the macromolecular modifier, epoxy-functionalized elastomer (ethylene vinyl acetate-glycidyl methacrylate terpolymer) (EVMG), is further grafted onto the PCPA coating to prepare the WBP@EVMG hybrid materials. During the preparation of the WBP@EVMG hybrid materials, a ring-opening reaction between the amine group of PCPA and the epoxy group of EVMG occurs. The NR/WBP@EVMG composites are prepared by mechanical blending. The interfacial interactions between WBP@EVMG and NR are analyzed and verified in detail by dynamic mechanical analysis (DMA) and rubber process analyzer (RPA). It is shown that the modified NR/WBP composites show increased vulcanization rate and better mechanical properties, and the tensile strength, abrasion resistance, cracking strength, and wet slip resistance of NR/WBP@EVMG-15 are increased by 29%, 6%, 16%, and 11%, respectively, compared with that of NR/WBP composites, which provides a unique idea for the reuse of waste brick powder in rubber.

Graphical abstract

中文翻译：

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低成本贻贝启发的聚（儿茶酚/聚胺）改性废砖粉，然后将环氧弹性体接枝到天然橡胶复合材料上的效果

本研究的目的是探索一种对废砖粉（WBP）进行改性的方法，以便将其重新应用于橡胶制品，实现有效的资源循环利用。首先，我们利用儿茶酚/聚胺（CPA）在WBP表面的自动聚合形成聚儿茶酚/聚胺（PCPA）涂层作为中间反应平台。然后将高分子改性剂环氧功能化弹性体（乙烯醋酸乙烯酯-甲基丙烯酸缩水甘油酯三元共聚物）（EVMG）进一步接枝到PCPA涂层上，制备WBP@EVMG杂化材料。在WBP@EVMG杂化材料的制备过程中，PCPA的胺基和EVMG的环氧基之间发生开环反应。 NR/WBP@EVMG 复合材料是通过机械共混制备的。通过动态力学分析（DMA）和橡胶加工分析仪（RPA）对WBP@EVMG和NR之间的界面相互作用进行了详细分析和验证。结果表明，改性后的NR/WBP复合材料表现出更高的硫化速率和更好的机械性能，其中NR/WBP@EVMG-15的拉伸强度、耐磨性、开裂强度和抗湿滑性分别提高了29%、6%与NR/WBP复合材料相比分别提高了16%和11%，这为废砖粉在橡胶中的再利用提供了独特的思路。

图形概要