菠萝叶纤维拉伸力学行为研究  

Tensile Mechanical Behavior of Pineapple Leaf Fiber

作　　者：庄志凯[1] 李明福[1] 张鹏[1] 连文伟[1] 何俊燕[1] 黄涛[1] 张劲[1] ZHUANG Zhikai;LI Mingfu;ZHANG Peng;LIAN Wenwei;HE Junyan;HUANG Tao;ZHANG Jin(Institute of Agricultural Machinery, CATAS, Zhanjiang,Guangdong 524091)

机构地区：[1]中国热带农业科学院农业机械研究所

出　　处：《热带农业科学》2019年第4期88-92,共5页Chinese Journal of Tropical Agriculture

基　　金：海南省自然科学基金资助(No.519QN302);中国热带农业科学院基本科研业务费专项资金(No.1630132018002,No.1630132017008,No.1630062015014);广东省自然科学基金项目(No.2016A030307001);湛江市科技计划项目(No.2017A03015)

摘　　要：为研究植物纤维的力学特性,以菠萝叶纤维为研究对象,根据菠萝叶纤维细度存在明显差异,研究干(13%)、湿)84%)2种状态下不同部位的纤维拉伸力学行为,研究结果表明:纤维根、中、梢部平均细度分别为18.54、15.38和14.73tex;干纤维根、中、梢部断裂强力均值分别为103.14、77.73和77.12cN,断裂强度均值分别为5.73、5.12和5.10cN/dtex;湿纤维根、中、梢部断裂强力均值分别为147.95、105.33和99.45cN,断裂强度均值分别为8.38、7.10和7.02cN/dtex。由方差分析可知,在纤维的干、湿2种状态中,根部和中、梢部的力学特性差异较显著,中、梢部无明显差异,这可能和根部细度值较中、梢部大,而中、梢部细度值相差较小有关。此外,湿态纤维抗拉能力大于干态纤维,与其他麻类纤维湿强比干强大的拉伸规律一致。本试验间接反映出纤维增强体复合材料的力学性质,促进纤维的开发利用,为纤维应用于纺织、医学、军事等领域提供理论依据和基础数据。Fibers extracted from pineapple leaves were tested to study their mechanical properties. There was a significant difference in fineness of pineapple leaf fibers, based on which the tensile mechanical behaviors of different parts of the fibers of the pineapple leaves under dry (13%) and wet (84%) conditions were analyzed. The results showed that the average fineness of the fibers was 18.54, 15.38 and 14.73 tex in base, middle and tip, respectively. The breaking strength of the dry fibers averaged 103.14, 77.73 and 77.12 cN in base, middle and tip, respectively, and the fracture strength averaged 5.73, 5.12 , 5.10 cN/dtex in base, middle and tip, respectively. The average breaking strength of the wet fibers was 147.95, 105.33 and 99.45 cN in base, middle and tip, respectively, and the average fracture strength was 8.38, 7.10, 7.02 cN/dtex, respectively. Analysis of variance showed that the fibers in both dry and wet stages were significantly different in mechanical properties between the base and the middle and tip, but not significantly different between the middle and the tip, which may be due to the fact that the base of the fibers was larger in fineness than the middle and the tip with small difference in fineness between the middle and the tip. In addition, the wet fibers had higher tensile strength than the dry fibers, which is consistent with the higher tensile strength of other hemp fibers in wet than in dry. This research indirectly reflects the mechanical properties of the composites of fiber reinforcements, promotes the development and utilization of fibers, and provides theoretical basis and basic data for the application of fibers in textile, medical, military and other fields.

关 键 词：菠萝叶纤维 纤维细度 力学行为 拉伸试验 方差分析 

分 类 号：TB332[一般工业技术—材料科学与工程]