Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
Carbohydr Polym. 2022 Nov 15;296:119920. doi: 10.1016/j.carbpol.2022.119920. Epub 2022 Jul 25.
Exploration of functional materials based on sustainable and renewable biomolecules has been of much interest. Herein, nature-inspired photonic films were proposed by incorporation of bio-based lignin nanoparticles (LNPs) into chiral nematic cellulose crystals (CNCs). Evaporation induced self-assembly (EISA) formed oriented and layered structure of the nanocomposites iridescent films with enlarged helix pitches by intercalation of higher amounts of LNPs. Decreased crystallite sizes and expanding layer gaps indicated the homogeneous distribution and hydrophobic interactions between CNCs and LNPs. Distinguished UV absorption capabilities with over 90 % shielding capabilities in UVB region and increased hydrophobicity with the contact angle of 75° were achieved for the composite films due to the presence of hydrophobic lignin. The proposed optical films also showed outstanding cytocompatibility owing to all-natural components introduced into the materials, which may display great potentials in many fields such as stimuli sensing, anti-counterfeiting and wearable devices.
基于可持续和可再生生物分子的功能材料的探索一直备受关注。本文通过将生物基木质素纳米颗粒（LNP）引入手性向列纤维素晶体（CNC）中，提出了受自然启发的光子薄膜。蒸发诱导自组装（EISA）形成了取向和分层结构的纳米复合材料彩虹薄膜，通过插层更多数量的 LNP，增大了螺旋间距。结晶度减小和层间间隙扩大表明 CNC 和 LNP 之间存在均匀的分布和疏水相互作用。由于存在疏水性木质素，复合膜具有出色的紫外线吸收能力，在 UVB 区域的屏蔽能力超过 90%，接触角为 75°，疏水性增加。由于引入了材料中的所有天然成分，所提出的光学薄膜还具有出色的细胞相容性，可能在刺激感应、防伪和可穿戴设备等许多领域具有巨大的潜力。
