【24h】

STUDY ON COMPATIBILIZING MECHANISM AND EFFECTS OF PLA/FLAX

机译:PLA /亚麻纤维的相容机理与作用研究

获取原文
获取原文并翻译 | 示例

摘要

Eco-friendly and renewable materials have gained increasing worldwide concern.Plant fiber reinforced and toughened bio-composites for high stiffness, strength, modulus, transparency and the low density, cost, wear make However, compatibility between hydrophilic plant fiber and hydrophobic polylactic acid (PLA) is poor. Considered the most important decisive factor for the quality of the biocomposites, Fiber-matrix adhesion is essential for a good transfer of the applied stress between the two materials. In this paper, flax was modified by silane coupling agent KH-550 treatment (KF), maleic anhydride grafting (MF), corona discharge treatment (CF) and alkali treatment (AF) to improve interfacial strength of PLA/Flax. The suitable modification conditions of flax were ascertained by FTIR. The compatibilizing effects of different modification were investigated by SEM, oil/water test and mechanical properties test, KF>MF>CF>AF>UF (untreated flax). Compatibilizing mechanism was studied by horizontal contrast. KF and MF ascended from lower water phase to higher engine oil phase during oil/water test, which provided evidence of new hydrophobic character. Surface polarity of flax changed with silane coupling agent KH-550 treatment and maleic anhydride grafting. The low polarity groups -(CH_2)_3-NH_2 and -OCO-CH =CH-COOH were formed on the surface of KF and MF, respectively. They belong to chemical compatibilizing. While alkali treatment and corona discharge treatment increased the surface roughness of flax to expand the surface area, which could increase the number of contacting points of PLA and flax, and grip become more securely. Both of them were in a category of physical compatibilizing.
机译:环保和可再生材料在全球范围内受到越来越多的关注。植物纤维增强和增韧的生物复合材料具有较高的刚度,强度,模量,透明度和低密度,低成本,高耐磨性。然而,亲水性植物纤维与疏水性聚乳酸之间的相容性( PLA)很差。被认为是生物复合材料质量最重要的决定性因素,纤维基质的粘合对于在两种材料之间良好地传递所施加的应力至关重要。本文通过硅烷偶联剂KH-550处理(KF),马来酸酐接枝(MF),电晕放电处理(CF)和碱处理(AF)对亚麻进行改性,以提高PLA /亚麻的界面强度。亚麻的合适的修饰条件通过FTIR确定。通过SEM,油/水测试和力学性能测试,KF> MF> CF> AF> UF(未经处理的亚麻)研究了不同改性的增容效果。通过水平对比研究了相容机理。在油/水测试期间,KF和MF从较低的水相上升到较高的发动机油相,这提供了新的疏水特性的证据。亚麻的表面极性通过硅烷偶联剂KH-550处理和马来酸酐接枝而改变。低极性基团-(CH_2)_3-NH_2和-OCO-CH = CH-COOH分别形成在KF和MF的表面上。它们属于化学相容性。碱处理和电晕放电处理会增加亚麻的表面粗糙度,扩大表面积,这可能会增加PLA与亚麻的接触点数量,并且抓地力变得更牢固。他们两个都属于身体相容性类别。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号