文献知网节
  • 记笔记

MECHANICAL PROPERTIES CHARACTERIZATIONS OF COMPOSITES MADE FROM POLY(LACTIC ACID) AND MILLED CARBON FIBERS WITH A MELT MIXING EXTRUDER FOR ADDITIVE MANUFACTURING APPLICATIONS

Yuan WANG1Naoya KOBAYASHI2Daisuke HIGURASHI2Keigo ISHIZUKA2Kohji SUZUKI2Masahiro HOSOYA3

1. Chiba Institute of Technology, Graduate School of Mechanical Science and Engineering2. Chiba Institute of Technology, Department of Mechanical Engineering3. Chiba Industrial support Technical Research Institute

摘要:One of the ultimate goals of the green composite materials made from bio-degradable poly(lactic acid), PLA and various natural and/or chemical fillers and reinforcing fibers is the one that, by using those environmentally conscious materials, any better situations in our ordinal lives are to be realized.In that context, any combinations of the green composites processing and some new manufacturing techniques such as additive manufacturing with 3D printers promise several considerable benefits such as making the molded products lighter and more rational in terms of structural optimization.In this preliminary report of the present author on 3D printing additive manufacturing of green composites,trial composite filaments for fused deposition modeling(FDM) 3D printers will be molded from poly(lactic acid), PLA, and milled carbon fibers.From the X-ray CT image analysis of the molded composite filaments for 3D printers, their quality and 3D printability will be discussed.Another trial of putting cellulose-related fibrous powders(CNF) into PLA and PLA/milled CF to make 3D printer filaments will be carried out as well.Base materials used in this study are powdered poly(lactic acid), PLA, for thermoplastic matrix,milled carbon fibers, as well as crushed kenaf(Hibiscus cannabinus) bast fibers for reinforcing fillers.The filament processing actually conducted in this study is shown in Fig.1.The powders of PLA and the milled carbon and/or crushed kenaf bast fibers were blended with a general-purpose food mixer in dry condition into composite mixtures of four different fiber content weight ratios, that is, 0 wt%(neat PLA), 2 wt%, 5 wt% and 10 wt%.The dry mixtures of PLA and kenaf were loaded into the 3D printing filament extruder(Noztek Pro).Nozzle diameter of the extruder was 2.85 mm.The temperature in the hot melting part was set to 205oC, and filament extruding speed was 420 mm/min.X-ray CT images(TDM1000 H-Ⅱ(2 K) Yamato Scientific Co.,Ltd.) of the present green composite filaments were obtained for examining external and internal morphological qualities of the filaments.The tube voltage and current were respectively set to 25 kV and 0.2 m A.Spatial resolution of the CT images was approximately 6.67μm.CT image analysis software, simpleware 7.0(JSOL Corp.), was used for investigating filament qualities for 3D printing and measuring their cross-sectional areas.As one the typical processing examples, Fig.2 shows the present PLA/kenaf filaments(0 wt%,2 wt%, 5 wt% and 10 wt%).A piece of neat PLA filament(0 wt%) was found to be relatively clear and have smooth surface texture.On the other hand, composite filaments were found to have rough surface textures obviously due to kenaf reinforcing fiber inclusions.In Fig.3, X-ray CT images of PLA/kenaf filaments are shown.It is found that the surfaces of PLA/kenaf filaments with more than 5 wt% fiber content are rough and their internal conditions are not good.Therefore, better processing conditions such as temperature
会议名称:

第二十一届国际复合材料大会

会议时间:

2017-08-20

会议地点:

中国陕西西安

  • 专辑:

    理工B(化学化工冶金环境矿业)

  • 专题:

    有机化工; 材料科学

  • 分类号:

    TQ327.3;TB332

  • 手机阅读
    即刻使用手机阅读
    第一步

    扫描二维码下载

    "移动知网-全球学术快报"客户端

    第二步

    打开“全球学术快报”

    点击首页左上角的扫描图标

    第三步

    扫描二维码

    手机同步阅读本篇文献

  • CAJ下载
  • PDF下载

下载手机APP用APP扫此码同步阅读该篇文章

下载:2 页码:595-598 页数:4 大小:451k

相关推荐
  • 相似文献
  • 读者推荐
  • 相关基金文献
  • 关联作者
  • 相关视频