Strong adhesion between the sole and the upper part of shoes is necessary to maintain their integrity and protect the foot from external conditions. Vulcanized rubbers are commonly used for sole manufacturing but, because of their nonpolar nature, they need to be conditioned before bonding. In this work, atmospheric-pressure air plasma treatments on flat and mechanically roughened nitrile butadiene rubber (NBR) were studied as environmentally friendly alternatives to the usual halogenation process to improve the adhesion between NBR and leather parts. Surface activation and coatings by plasma-polymerization of (3-aminopropyl) triethoxysilane were used, and the evolution of their effectiveness during the following 30 days was studied. Both treatment types achieved bond strengths that were greater than those of the untreated NBR. Coating treatments caused an initial increase in the surface polar carbon-oxygen species, which was kept for at least the following 6 days and allowed for an improvement of the bond strength when the coatings were bonded with the leather within that period. However, the presence of these species on the coatings decreased during storage, resulting in weaker adhesion than that of the untreated NBR before the end of the aging study. The most durable effectiveness (30 days) was shown by plasma-activated, mechanically roughened NBR. Chemical and morphological characterizations suggested that this durable adhesion improvement was due to ablation by the plasma irradiation, which had a roughening effect at a microscopic scale, additionally to the macroscopic effects of mechanical roughening.

鞋底和鞋帮之间必须有很强的附着力，以保持鞋底的完整性并保护脚不受外部环境的影响。硫化橡胶通常用于鞋底制造，但是由于其非极性性质，需要在粘合前进行调节。在这项工作中，研究了在扁平的和机械粗糙化的丁苯橡胶（NBR）上进行大气压空气等离子体处理，以此作为常规卤化工艺的环保替代品，以提高NBR与皮革零件之间的粘合力。使用（3-氨基丙基）三乙氧基硅烷的等离子聚合进行表面活化和涂层，并研究了其在接下来的30天内有效性的演变。两种处理类型的粘结强度均高于未处理的NBR。涂层处理导致表面极性碳氧物种的初始增加，这种现象至少持续了接下来的6天，并且在此期间内将涂层与皮革粘合时，可以提高粘合强度。但是，在储存期间，这些物质在涂层上的存在量减少了，从而导致与未处理的NBR相比，在老化研究结束之前，其粘附力较弱。等离子活化的机械粗糙的丁腈橡胶显示出最持久的效果（30天）。化学和形态学特征表明，这种持久的附着力提高是由于等离子体辐照引起的烧蚀，除了机械粗糙化的宏观影响之外，等离子体辐照还具有微观上的粗糙化效果。