Tough Particle‐Based Double Network Hydrogels for Functional Solid Surface Coatings,Advanced Materials Interfaces

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Tough Particle‐Based Double Network Hydrogels for Functional Solid Surface Coatings
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2018-10-04 , DOI: 10.1002/admi.201801018
Riku Takahashi ₁ , Kouichi Shimano ₁ , Haruka Okazaki ₁ , Takayuki Kurokawa _{2,

3} , Tasuku Nakajima _{2,

3} , Takayuki Nonoyama _{2,

3} , Daniel R. King _{2,

3} , Jian Ping Gong _{2,

3}

Affiliation

Coating solid surfaces with tough hydrogels is necessary for the practical application of hydrogels in various fields. Here a simple yet versatile method for coating tough double network (DN) hydrogels onto a wide range of solid surfaces, including various materials and geometries is reported. Particle‐based double network (P‐DN) gels that combine ease‐of‐use and significantly strong mechanical properties are utilized. The P‐DN gel coating process involves two steps. First, the solid surface (plastic, rubber, ceramic, and/or metal) is treated to form a thin, physically bound primer layer containing radical initiators. The pre‐gel solution is then applied to the treated surface, followed by photo‐induced polymerization. The P‐DN gel coatings show high toughness, with one notable formulation reaching over 1000 J m^‐2 in a 90º peeling test. The coatings also show high stability against long‐term water‐storage, elevated temperatures, and solvent exposure. Moreover, it is demonstrated that the P‐DN gel‐coated surfaces exhibit low friction properties with high wear resistance, by pin‐on‐flat tests. The simple coating process can be used even on surfaces with complex geometries, including 3D shapes. This work will enable the use of DN gels in applications such as biocompatible lubricants, scratch resistance coatings, and anti‐fouling paints.

中文翻译：

适用于功能性固体表面涂层的基于颗粒的坚韧双网状水凝胶

用坚硬的水凝胶涂覆固体表面对于水凝胶在各个领域的实际应用是必不可少的。本文报道了一种简单而通用的方法，可将坚韧的双网络（DN）水凝胶涂覆到各种固体表面上，包括各种材料和几何形状。使用了结合了易用性和极强机械性能的基于颗粒的双网络（P-DN）凝胶。P-DN凝胶涂层工艺涉及两个步骤。首先，对固体表面（塑料，橡胶，陶瓷和/或金属）进行处理，以形成包含自由基引发剂的薄的，物理结合的底漆层。然后将预凝胶溶液施加到处理过的表面，然后进行光诱导聚合。P-DN凝胶涂料显示出高韧性，其中一种著名的配方达到了1000 J m ^-2以上在90º剥离测试中。涂料还显示出对长期储水，高温和溶剂暴露的高稳定性。此外，通过平面销钉测试表明，P-DN凝胶涂层表面表现出低摩擦性能和高耐磨性。即使在具有复杂几何形状（包括3D形状）的表面上，也可以使用简单的涂层工艺。这项工作将使DN凝胶可用于生物相容性润滑剂，耐刮擦涂料和防污漆等应用中。

更新日期：2018-10-04

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