摘要
采用将长竹纤维(BF)与聚乳酸纤维(PLA)合并加捻先制成捻合绳,再热烘的工艺(155℃、30 min)制备BF/PLA复合材料。通过改变捻合条件研究BF/PLA复合材料拉伸性能的变化,以获得最佳捻合工艺参数。运用纤维拉伸实验、扫描电子显微镜(SEM)等手段研究捻度、纤维根数和BF、PLA质量比对复合绳拉伸性能的影响。通过正交试验研究最佳捻合制备工艺参数,并对复合前后BF/PLA的拉伸性能及BF和PLA之间的结合状态进行对比分析。结果表明:加捻结构有助于竹纤维和熔融态PLA纤维之间的结合。随着捻度、纤维根数和BF、PLA质量比的增加,BF/PLA复合材料的拉伸强度均呈现先增加后降低的趋势,断裂强度最大值的单因素条件分别为捻度100捻/m、纤维根数16根和BF、PLA质量比42∶58。3个因素对拉伸性能的影响程度依次为:纤维根数>BF、PLA质量比>捻度。最佳捻合工艺参数:捻度100捻/m、纤维16根、BF、PLA质量比87∶13。此工艺下,复合绳的弹性模量和断裂强度分别为53.67 MPa和9.9 cN/tex,比捻合绳(复合前)分别提高16.1%和17.9%。
The process of preparing BF/PLA composite materials involves first twisting long bamboo fiber(BF)with polylactic acid fiber(PLA)to form a twisted rope,followed by heat treatment(155℃,30 min).The tensile properties of BF/PLA composite materials were investigated by changing the twisting conditions to obtain the optimal twisting process parameters.The effects of twist,the number of fibers,and the mass ratio of BF to PLA on the tensile properties of the composite rope were studied using fiber tensile tests and scanning electron microscopy(SEM).Orthogonal experiments were conducted to determine the optimal twisting process parameters,and the tensile properties of BF/PLA before and after compositing,as well as the bonding state between BF and PLA,were compared and analyzed.The results showed that the twisted structure helps the bonding between bamboo fibers and molten PLA fibers.As the twist,the number of fibers,and the mass ratio of BF to PLA increase,the tensile strength of the BF/PLA composite materials first increases and then decreases.The single-factor conditions for the maximum breaking strength are a twist of 100 twists/m,16 fibers,and a mass ratio of BF to PLA of 42∶58.The influence of the three factors on tensile properties is in the order of the number of fibers>mass ratio of BF to PLA>twist.The optimal twisting process parameters are a twist of 100 twists/m,16 fibers,and a mass ratio of BF to PLA of 87∶13.Under this process,the elastic modulus and breaking strength of the composite rope are 53.67 MPa and 9.9 cN/tex,respectively,which are 16.1%and 17.9%higher than those of the twisted rope(before compositing).
作者
曾凡松
张蔚
王宝灿
朱勇斌
何静怡
ZENG Fansong;ZHANG Wei;WANG Baocan;ZHU Yongbin;HE Jingyi(Jiyang College,Zhejiang A&F University,Shaoxing 311800,China)
出处
《塑料科技》
北大核心
2025年第4期113-117,共5页
Plastics Science and Technology
基金
浙江省科技厅公益性项目(LNG21C160006)。
关键词
竹纤维
聚乳酸
复合材料
捻合参数
断裂强度
Bamboo fiber
Polylactic acid
Composite
Twisting parameters
Breaking strength
