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纸浆纤维/聚乳酸复合材料的力学和热学性能

佘亚楠 付烨 朱钦睿 吴双双 徐信武

佘亚楠, 付烨, 朱钦睿, 等. 纸浆纤维/聚乳酸复合材料的力学和热学性能[J]. 复合材料学报, 2022, 39(10): 1-12 doi: 10.13801/j.cnki.fhclxb.20211115.005
引用本文: 佘亚楠, 付烨, 朱钦睿, 等. 纸浆纤维/聚乳酸复合材料的力学和热学性能[J]. 复合材料学报, 2022, 39(10): 1-12 doi: 10.13801/j.cnki.fhclxb.20211115.005
Yanan SHE, Ye FU, Qinrui ZHU, Shuangshuang WU, Xinwu XU. Mechanical and thermal properties of pulp fiber/polylactic acid composite[J]. Acta Materiae Compositae Sinica, 2022, 39(10): 1-12. doi: 10.13801/j.cnki.fhclxb.20211115.005
Citation: Yanan SHE, Ye FU, Qinrui ZHU, Shuangshuang WU, Xinwu XU. Mechanical and thermal properties of pulp fiber/polylactic acid composite[J]. Acta Materiae Compositae Sinica, 2022, 39(10): 1-12. doi: 10.13801/j.cnki.fhclxb.20211115.005

纸浆纤维/聚乳酸复合材料的力学和热学性能

doi: 10.13801/j.cnki.fhclxb.20211115.005
基金项目: 湖北省重点创新计划(2019ABA097)
详细信息
    通讯作者:

    徐信武,博士,教授,博士生导师,研究方向为木质复合材料 E-mail: xucarpenter@njfu.edu.cn

  • 中图分类号: TB332

Mechanical and thermal properties of pulp fiber/polylactic acid composite

  • 摘要: 生物质衍生填料增强的生物复合材料一直被认为是极具潜力的石油基产品的替代品。引入高含量漂白纸浆纤维(10wt%~50wt%),使用辊磨挤出法和密炼法两种预混工艺,采用马来酸酐接枝聚丙烯(MA-g-PP)为相容剂,制备了纸浆纤维/聚乳酸(PLA)复合材料。采用拉伸测试、SEM、FTIR、DMA和TGA表征,综合考察了制备工艺和纤维含量对复合材料的力学性能、热学性能和微观结构的影响。结果表明:密炼法比辊磨挤出法更有效地实现了纤维在基体中的良好分散(几乎定向排列)。50wt%纤维含量的密炼加工复合材料实现了最大的拉伸强度(50.49 MPa,略高于PLA)和最高的弹性模量值(2.56 GPa,比PLA高45.8%)。刚性填充的纸浆纤维降低了复合材料的阻尼性能,损耗因子tanδ峰值温度发生正迁移。纸浆纤维不会对热稳定性产生不利影响,复合材料的残留物含量提高。研究表明,漂白纸浆纤维增强改性PLA制造可生物降解的复合材料是可行的。

     

  • 图  1  纸浆纤维/PLA复合材料的制备及测试流程

    Figure  1.  Melt compounding and testing process of pulp fiber/PLA composite

    PLA—Polylactic acid; MA-g-PP—Maleic anhydride grafted polypropylene; GE process—Grinding and extruding process; IM process—Internal mixing process

    图  2  辊磨挤出工艺((a)、(c)、(e))和密炼工艺((b)、(d)、(f))下纸浆纤维/PLA复合材料的拉伸强度、杨氏模量和应力-应变曲线

    Figure  2.  Tensile strength, Young's modulus and stress-strain curves of pulp fiber/PLA composite under GE process ((a), (c), (e)) and IM process ((b), (d), (f))

    图  3  (a)纸浆纤维; (b) PLA脆性断裂形貌;(c)纸浆纤维/PLA试样表面(上层为辊磨挤出样品,下层为密炼样品);((d)~(o))纸浆纤维/PLA复合材料拉伸样品的微观断面形貌,样品分别选取了10wt%fiber/PLA-GE ((d)、(g))、40wt%fiber/PLA-GE ((e)、(h))、 50wt%fiber/PLA-GE ((f)、(i))、10wt%fiber/PLA-IM ((j)、(m))、40wt%fiber/PLA-IM ((k)、(n))、 50wt%fiber/PLA-IM ((l)、(o))

    Figure  3.  (a) Microscopic morphology of pulp fibers; (b) Brittle fracture morphology of pure PLA; (c) Specimen surface of pulp fiber/PLA (the upper layer represents GE samples, while the lower layer represents IM samples); ((d)-(o)) Cross-section morphologies of fractured specimen of pulp fiber/PLA composites, respectively, selected samples of 10wt%fiber/PLA-GE ((d), (g)), 40wt%fiber/PLA-GE ((e), (h)), 50wt%fiber/PLA-GE ((f), (i)), 10wt%fiber/PLA-IM ((j), (m)), 40wt%fiber/PLA-IM ((k), (n)), 50wt%fiber/PLA-IM ((l), (o))

    图  4  辊磨挤出工艺(a)和密炼工艺(b)下纸浆纤维/PLA复合材料的红外图谱

    Figure  4.  FTIR spectras of pulp fiber/PLA composite under GE process (a) and IM process (b)

    图  5  辊磨挤出工艺((a)、(c)、(e))和密炼工艺((b)、(d)、(f))下纸浆纤维/PLA复合材料的动态黏弹性能:储能模量((a)、(b));损耗模量((c)、(d));损耗因子(tanδ) ((e)、(f))

    Figure  5.  Dynamic viscoelastic properties of pulp fiber/PLA composite under GE process ((a), (c), (e)) and IM process ((b), (d), (f)): Storage modulus ((a), (b)); Loss modulus ((c), (d)); Loss factor (tanδ) ((e), (f))

    图  6  PLA和纸浆纤维/PLA复合材料的热稳定性:((a)、(b)) TGA;((c)、(d)) DTG

    Figure  6.  Thermal stability of PLA and pulp fiber/PLA compsites: ((a), (b)) TGA; ((c), (d)) DTG

    表  1  纸浆纤维/聚乳酸(PLA)复合材料的原料配比

    Table  1.   Formulations of pulp fiber/polylactic acid (PLA) composites

    Pre-melting methodsSample codeFiber/wt%PLA/wt%MA-g-PP/wt%
    Grinding and extruding
    process (GE process)
    PLA-GE01000
    10wt%fiber/PLA-GE10864
    20wt%fiber/PLA-GE20764
    30wt%fiber/PLA-GE30664
    40wt%fiber/PLA-GE40564
    50wt%fiber/PLA-GE50464
    Internal mixing
    process (IM process)
    PLA-IM01000
    10wt%fiber/PLA-IM10864
    20wt%fiber/PLA-IM20764
    30wt%fiber/PLA-IM30664
    40wt%fiber/PLA-IM40564
    50wt%fiber/PLA-IM50464
    Notes: MA-g-PP—Maleic anhydride grafted polypropylene.
    下载: 导出CSV
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  • 收稿日期:  2021-08-16
  • 录用日期:  2021-11-05
  • 修回日期:  2021-10-10
  • 网络出版日期:  2021-11-16
  • 刊出日期:  2022-10-15

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