Lilargem Rocha Diego, Tambara Júnior Luís Urbano Durlo, Marvila Markssuel Teixeira, Pereira Elaine Cristina, Souza Djalma, de Azevedo Afonso Rangel Garcez
Advanced Materials Laboratory (LAMAV), UENF-State University of the Northern Rio de Janeiro, Av. Alberto Lamego, 2000, Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil.
Civil Engineering Laboratory (LECIV), UENF-State University of the Northern Rio de Janeiro, Av. Alberto Lamego, 2000, Campos dos Goytacazes, Rio de Janeiro 28013-602, Brazil.
Polymers (Basel). 2022 May 17;14(10):2043. doi: 10.3390/polym14102043.
The use of natural lignocellulosic fibers has become popular all over the world, as they are abundant, low-cost materials that favor a series of technological properties when used in cementitious composites. Due to its climate and geographic characteristics, Brazil has an abundant variety of natural fibers that have great potential for use in civil construction. The objective of this work is to present the main concepts about lignocellulosic fibers in cementitious composites, highlighting the innovation and advances in this topic in relation to countries such as Brazil, which has a worldwide prominence in the production of natural fibers. For this, some common characteristics of lignocellulosic fibers will be observed, such as their source, their proportion of natural polymers (biological structure of the fiber), their density and other mechanical characteristics. This information is compared with the mechanical characteristics of synthetic fibers to analyze the performance of composites reinforced with both types of fibers. Despite being inferior in tensile and flexural strength, composites made from vegetable fibers have an advantage in relation to their low density. The interface between the fiber and the composite matrix is what will define the final characteristics of the composite material. Due to this, different fibers (reinforcement materials) were analyzed in the literature in order to observe their characteristics in cementitious composites. Finally, the different surface treatments through which the fibers undergo will determine the fiber-matrix interface and the final characteristics of the cementitious composite.
天然木质纤维素纤维的使用在全球范围内已变得很普遍，因为它们是丰富的低成本材料，在用于水泥基复合材料时具有一系列技术特性。由于其气候和地理特征，巴西拥有丰富多样的天然纤维，在土木建筑中具有巨大的使用潜力。本文的目的是介绍水泥基复合材料中木质纤维素纤维的主要概念，突出该主题相对于巴西等国家的创新和进展，巴西在天然纤维生产方面在世界上具有突出地位。为此，将观察木质纤维素纤维的一些共同特征，例如它们的来源、天然聚合物的比例（纤维的生物结构）、密度和其他机械特性。将这些信息与合成纤维的机械特性进行比较，以分析用这两种纤维增强的复合材料的性能。尽管植物纤维制成的复合材料在拉伸强度和弯曲强度方面较差，但在低密度方面具有优势。纤维与复合基质之间的界面将决定复合材料的最终特性。因此，文献中分析了不同的纤维（增强材料），以观察它们在水泥基复合材料中的特性。最后，纤维所经历的不同表面处理将决定纤维-基质界面以及水泥基复合材料的最终特性。
