“Smart” stimuli-responsive materials have been the subject of decades of research because of their versatility and particularly their use in medical and sensing applications. While these materials are often composed exclusively of responsive polymers, there is growing interest in smart hybrid systems that contain at least two distinct components, each contributing uniquely to the final material. Cellulose nanocrystals (CNCs) have found extensive application in smart hybrid systems, as CNCs can both contribute to the mechanical and optical properties of the system and bear stimuli-responsive surface modifications. This review covers the recent body of work on CNC-containing smart hybrid systems, with attention given to the fabrication methodologies that have been employed to generate both physically and optically adaptable CNC-based smart systems. Additionally, the unique application of CNCs in self-healing composites and shape memory polymers will be discussed.

“智能”刺激响应材料因其多功能性，特别是在医学和传感应用中的使用而成为数十年来研究的主题。尽管这些材料通常仅由响应性聚合物组成，但人们对智能混合系统的兴趣日益浓厚，该系统至少包含两个不同的组件，每个组件对最终材料都有独特的贡献。纤维素纳米晶体（CNC）已在智能混合系统中得到广泛应用，因为CNC既可以促进系统的机械和光学特性，又可以进行刺激响应的表面修饰。这篇综述涵盖了包含CNC的智能混合系统的最新工作，并关注了用于生成物理和光学适应的基于CNC的智能系统的制造方法。