Wood templates are promising biobased substrates that can be functionalized for controlled nanostructure, and the development of novel nanotechnologies. A sustainable, selective and versatile chemical functionalization platform for cellulosic wood templates is developed. Bulk wood templates are delignified using peracetic acid, and the nanoporous delignified wood templates are functionalized with cyclic anhydrides (maleic, itaconic and succinic) from renewable resources. The synthetic pathway uses solvent-free reaction conditions, short reaction times, and has possibilities for chemical recovery. Anhydrides become covalently attached inside the nanoporous wood cell wall and yields wood templates with lower moisture sorption, preserved nano- and ultrastructure, and high degree of esterification with carboxyl content as high as 3.93 mmol g⁻¹. The functionalization platform enables interface tailoring at the molecular scale with possibility for further reaction and covalent modifications. This is demonstrated by the preparation of transparent wood biocomposites. The biocomposites exhibit controlled wood–polymer interfacial adhesion with high optical transmittance. The favorable interaction mechanisms at the cell wall level result in mechanically strong biocomposites.

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通过多功能功能化平台定制界面，用于纳米结构的木质生物复合材料

木质模板是有前途的生物基基材，可以针对受控的纳米结构进行功能化，并开发新的纳米技术。开发了一种可持续的，选择性的，多功能的纤维素木模板化学功能化平台。使用过乙酸对大块木质模板进行脱木质处理，并使用可再生资源中的环状酸酐（马来酸，衣康酸和琥珀酸）对纳米多孔脱木素木质模板进行功能化。合成途径使用无溶剂的反应条件，反应时间短，并具有化学回收的可能性。酸酐共价结合在纳米多孔木细胞壁内，并产生具有较低吸湿性，保留的纳米结构和超微结构以及高度酯化度且羧基含量高达3.93 mmol g的木质模板^-1。官能化平台能够在分子规模进行界面剪裁，并有可能进一步反应和共价修饰。透明木材生物复合材料的制备证明了这一点。生物复合材料显示出受控的木材-聚合物界面粘合性以及高透光率。在细胞壁水平上有利的相互作用机制导致了机械强度高的生物复合材料。