Yang Jianlei, Ching Yern Chee, Chuah Cheng Hock
Department of Chemical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia.
Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
Polymers (Basel). 2019 Apr 28;11(5):751. doi: 10.3390/polym11050751.
Lignocellulosic fibers and lignin are two of the most important natural bioresources in the world. They show tremendous potential to decrease energy utilization/pollution and improve biodegradability by replacing synthetic fibers in bioplastics. The compatibility between the fiber-matrix plays an important part in the properties of the bioplastics. The improvement of lignocellulosic fiber properties by most surface treatments generally removes lignin. Due to the environmental pollution and high cost of cellulose modification, focus has been directed toward the use of lignocellulosic fibers in bioplastics. In addition, lignin-reinforced bioplastics are fabricated with varying success. These applications confirm there is no need to remove lignin from lignocellulosic fibers when preparing the bioplastics from a technical point of view. In this review, characterizations of lignocellulosic fibers and lignin related to their applications in bioplastics are covered. Then, we generalize the developments and problems of lignin-reinforced bioplastics and modification of lignin to improve the interaction of lignin-matrix. As for lignocellulosic fiber-reinforced bioplastics, we place importance on the low compatibility of the lignocellulosic fiber-matrix. The applications of lignin-containing cellulose and lignocellulosic fibers without delignification in the bioplastics are reviewed. A comparison between lignocellulosic fibers and lignin in the bioplastics is given.
木质纤维素纤维和木质素是世界上最重要的两种天然生物资源。它们在生物塑料中替代合成纤维，具有降低能源利用/污染以及提高生物降解性的巨大潜力。纤维与基体之间的相容性对生物塑料的性能起着重要作用。大多数表面处理对木质纤维素纤维性能的改善通常会去除木质素。由于环境污染和纤维素改性成本高，人们的注意力已转向在生物塑料中使用木质纤维素纤维。此外，木质素增强生物塑料的制备取得了不同程度的成功。这些应用证实，从技术角度来看，在制备生物塑料时无需从木质纤维素纤维中去除木质素。在这篇综述中，涵盖了与木质纤维素纤维和木质素在生物塑料中的应用相关的表征。然后，我们总结了木质素增强生物塑料的发展和问题以及木质素改性以改善木质素与基体之间的相互作用。至于木质纤维素纤维增强生物塑料，我们强调木质纤维素纤维与基体之间相容性低的问题。综述了含木质素纤维素和未脱木质素的木质纤维素纤维在生物塑料中的应用。并对生物塑料中的木质纤维素纤维和木质素进行了比较。
