This review is the third part of a series of reviews on hydrophobization of lignocellulosic materials, a relevant topic nowadays, due to the need to replace fossil fuel-based materials. The review provides an overview of the hydrophobization of lignocellulosic materials by polymer adsorption, and both chemical and radiation-induced grafting of polymers. While adsorbed polymers are only attached to the surfaces by physical interactions, grafted polymers are chemically bonded to the materials. Radiation-induced grafting is typically the most environmentally friendly grafting technique, even though it provides little control on the polymer synthesis. On the other hand, controlled radical polymerization reactions are more complex but allow for the synthesis of polymers with elaborated architectures and well-defined properties. Overall, a wide range of contact angles can be obtained by polymer adsorption and grafting, from a slight increase in hydrophobicity to superhydrophobic properties. The choice of modification technique depends on the end-use of the modified material, but there is a clear trend towards the use of more environmentally friendly chemicals and processes and the grafting of polymers with complex structures.

Graphical abstract

中文翻译：

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木质纤维素材料的疏水化第三部分：聚合物改性

由于需要替代化石燃料基材料，这篇综述是关于木质纤维素材料疏水化的系列综述的第三部分，这是当今的一个相关话题。该综述概述了通过聚合物吸附对木质纤维素材料进行疏水化，以及聚合物的化学和辐射诱导接枝。吸附聚合物仅通过物理相互作用附着在表面上，而接枝聚合物则以化学方式与材料结合。辐射诱导接枝通常是最环保的接枝技术，尽管它对聚合物合成几乎没有控制。另一方面，受控自由基聚合反应更复杂，但允许合成具有精细结构和明确特性的聚合物。全面的，通过聚合物吸附和接枝可以获得大范围的接触角，从疏水性的轻微增加到超疏水性。改性技术的选择取决于改性材料的最终用途，但明显的趋势是使用更环保的化学品和工艺以及接枝具有复杂结构的聚合物。

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