Cellulose nanocrystals (CNCs) with >2000 photoactive groups on each can act as highly efficient initiators for radical polymerizations, cross‐linkers, as well as covalently embedded nanofillers for nanocomposite hydrogels. This is achieved by a simple and reliable method for surface modification of CNCs with a photoactive bis(acyl)phosphane oxide derivative. Shape‐persistent and free‐standing 3D structured objects were printed with a mono‐functional methacrylate, showing a superior swelling capacity and improved mechanical properties.

中文翻译：

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用于纳米复合水凝胶3D打印的多合一纤维素纳米晶体

纤维素纳米晶体（CNC）各自具有> 2000个光敏基团，可以充当自由基聚合，交联剂以及共价嵌入的纳米复合水凝胶纳米填料的高效引发剂。这是通过使用光敏双（酰基）膦氧化物衍生物对CNC进行表面改性的简单可靠的方法来实现的。形状持久且独立的3D结构化对象使用单功能甲基丙烯酸酯印刷，显示出卓越的溶胀能力和改善的机械性能。