Preparation and properties of carbon fibers based on lignin

Abstract

Abstract Lignin is one of the main components of plant fiber materials, and its stock in nature only inferior to cellulose. Lignin can be used as a carbon fiber materials owing to its high carbon content (usually 55% ~ 66%).

Generally, lignin is a by-product of pulping process without recycling, which causes a big problem in environment protection and materials utilization. In this paper, formic acid lignin was extracted from black liquor, and nano-carbon fiber was prepared from formic acid lignin. Firstly, formic acid lignin carbon fibers coming up through electro spinning, and then treated by pre-oxidation and carbonization to obtain the final lignin based nano-carbon fibers.

摘 要 木质素是植物纤维中的主要成分之一，在自然界中的蕴藏量很大，仅次于纤维素。因为木质素中碳元素含量较高（大约55%～66%），所以木质素可以作为制备碳纤维的原料进行利用。 木质素是造纸产业中制浆的副产物，如果不经回收，则不利于环境保护以及废物利用。在本文中，从黑液中提取的甲酸木质素最终被制备成纳米碳纤维素。首先，甲酸木质素进过静电纺丝得到碳纤维，经过预氧、高温碳化，最终得到纳米碳纤维素。