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基于3D打印的木材细胞壁仿生设计

秦施埼 任泽春 王辰希 寇允 刘昭言 许民

秦施埼, 任泽春, 王辰希, 等. 基于3D打印的木材细胞壁仿生设计[J]. 复合材料学报, 2022, 40(0): 1-11
引用本文: 秦施埼, 任泽春, 王辰希, 等. 基于3D打印的木材细胞壁仿生设计[J]. 复合材料学报, 2022, 40(0): 1-11
Shiqi QIN, Zechun REN, Chenxi WANG, Yun KOU, Zhaoyan LIU, Min XU. Bionic design of wood cell wall based on 3D printing[J]. Acta Materiae Compositae Sinica.
Citation: Shiqi QIN, Zechun REN, Chenxi WANG, Yun KOU, Zhaoyan LIU, Min XU. Bionic design of wood cell wall based on 3D printing[J]. Acta Materiae Compositae Sinica.

基于3D打印的木材细胞壁仿生设计

基金项目: 东北林业大学大学生国家级创新科研训练项目 (201910225161)
详细信息
    通讯作者:

    许民,博士,教授,博士生导师,研究方向为3D打印 E-mail: donglinxumin@163.com

  • 中图分类号: TB332

Bionic design of wood cell wall based on 3D printing

  • 摘要: 木材中起骨架作用的纤维素是以不同螺旋结构的微纤丝形式存在于细胞壁中。本文通过将3D打印技术与仿真模拟相结合,研究木材细胞壁的纤维螺旋增强结构。使用微晶纤维素(MCC)/聚乳酸(PLA)复合材料,在对MCC/PLA复合材料各项性能进行测试的基础上,借助3D打印技术构建木材细胞壁螺旋结构,通过改变纤维取向和纤维孔状结构编程合成结构的力学功能。有限元仿真则用于强调纤维在刚性单元之间的载荷传递机制中的关键作用。结果表明:通过编程纤维的取向和结构可以宏观调控结构的性能,其中纤维的交叉结构作为一种优化设计可以用于提高结构成型制品的力学性能。这些结构可以被组装成更大的系统,用于构建具有优化特定功能的模块化复合材料;在异质结构设计和新型复合材料制造领域中均具有潜在的应用价值。

     

  • 图  1  木材细胞壁S2层微纳结构的仿生模型图

    Figure  1.  Bionic model diagram of micro sodium structure in S2 layer of wood cell wall

    图  2  3 D打印试件截面图

    Figure  2.  Cross section of 3 D printed specimen ((a) Upper surface structure diagram of circular 0° structure; (b) comparison with upper surface structure diagram of structure)

    图  3  压缩后试件图

    Figure  3.  Specimen drawing after compression ((a) Figure of circular 45°compression specimen; (b) figure of circular 45° cross structure compression specimen)

    图  4  纯PLA与MCC/PLA复合材料脆断面的SEM图像

    Figure  4.  SEM images of brittle sections of pure PLA and MCC / PLA Composites ((a)PLA; (b)10%MCC/PLA; (c)20%MCC/PLA; (d)30% MCC/PLA)

    图  5  纯PLA与MCC/PLA复合材料的DSC曲线图

    Figure  5.  DSC curve of pure PLA and MCC/PLA composites and PLA materials

    图  6  纯PLA与MCC/PLA复合材料的TGA曲线

    Figure  6.  TGA curves of pure PLA and MCC / PLA Composites

    图  7  纯PLA与MCC/PLA复合材料的拉伸强度与拉伸杨氏模量折线图

    Figure  7.  broken line diagram of tensile Young's modulus and tensile strength of MCC / PLA and pure PLA

    图  8  MCC/PLA圆形、矩形、多边形结构及基体PLA对照结构的杨氏模量与压缩强度折线图

    Figure  8.  Broken line diagram of Young's modulus and compressive strength of PLA/MCC circular, rectangular, polygonal structure and matrix PLA control structure

    图  9  MCC/PLA圆形结构螺旋角度0°~60°的弹性模量与压缩强度折线图

    Figure  9.  Broken line diagram of elastic modulus and compressive strength of MCC/PLA circular structure with spiral angle of 0°~60°

    图  10  MCC/PLA圆形0°结构及MCC/PLA圆形交叉结构弹性模量与压缩强度折线图

    Figure  10.  Broken line diagram of elastic modulus and compressive strength of MCC/PLA circular 0 °structure and MCC/PLA circular cross structure

    图  11  多边形结构有限元分析应力分布云图

    Figure  11.  finite element analysis results of polygonal porous structure

    图  12  圆形结构与矩形结构的应力分布云图

    Figure  12.  Von-Mises of circular structure and rectangular structure ((a) Cloud diagram of stress distribution of circular structure (b) cloud diagram of stress distribution of rectangular structure)

    图  13  三种结构的截面形状图

    Figure  13.  sectional shapes of three structures

    图  14  (a)~(d) 15°~60°的交叉填充螺旋结构在3000 N集中力下的应力分布云图

    Figure  14.  (a)-(d) Stress distribution cloud diagram of the filled spiral structure with15°~60° under 3000 Nconcentrated force

    图  15  15°~60°的交叉螺旋结构的应变柱状图

    Figure  15.  Strain histogram of 15°~60° cross helical structure

    图  16  (a)~(d) 15°~60°的螺旋结构在90°扭转角下的应力分布云图

    Figure  16.  (a) - (d) shows the stress distribution nephogram of the spiral structure with 15°~60° under 90° torsion angle

    图  17  15°~60°的螺旋结构在90°扭转角下的扭转角-扭矩图

    Figure  17.  torsion angle torque diagram of 15° ~ 60° helical structure under 90 ° torsion angle

    图  18  圆形15°交叉结构与圆形结构的应力应变曲线图

    Figure  18.  stress~strain curve of circular 15 ° cross structure and circular structure

    表  1  主要原材料

    Table  1.   main materials

    MaterialSpecificationsManu factorNature
    Polylactic Acid
    (PLA)
    4032 DAmerican Nature Works CompanyThe density is 1.24 g∙cm−3 and the melting point range is 155~170°C
    Microcrystalline Cellulose
    (MCC)
    SH-105Anhui Shanhe Pharmaceutical CompanyMolecular weight 2.015, melting point 76-78°C, density 1.5 g /cm3 (20°C)
    PE WaxGeneral gradeShandong Qilu Petrochemical Engineering CompanyOuter diameter 20.00~30.00 nm, length 0.50~2.00 µm, Purity > 95%, wall number 23~25, length diameter ratio < 100 nm
    下载: 导出CSV

    表  2  纯PLA与 MCC/PLA复合材料的DSC曲线特征值

    Table  2.   DSC curve characteristic values of MCC/PLA and pure PLA

    Glass transition temperature /℃Crystallization Temperature /℃Crystallinity /%Melting temperature /℃
    Pure PLA64.92115.922.26169.925
    10%MCC/PLA65.91110.912.25169.917
    20%MCC/PLA64.92109.924.68169.921
    30%MCC/PLA64.92109.925.37169.923
    下载: 导出CSV

    表  3  纯PLA与MCC/PLA复合材料的TG曲线特征值表

    Table  3.   characteristic values of TG curves of MCC/PLA composites and PLA material

    Inflection point temperature/℃210℃ residual /%600℃ residual /%
    Pure PLA323.9199.611.64
    10%MCC/PLA312.6699.473.01
    20%MCC/PLA319.4299.284.16
    30%MCC/PLA320.1198.915.01
    下载: 导出CSV

    表  4  材料的有限元参数设定

    Table  4.   finite element parameter setting of materials

    Filling structureMatrix structure
    Modulus of elasticity/GPa1.20.78
    Poisson's ratio0.30.35
    Yield strength/MPa34.725.4
    下载: 导出CSV

    表  5  结构力学性能的有限元分析结果与压缩实验结果

    Table  5.   finite element analysis results and stress experimental results of mechanical properties of structures

    Stress/MPaModulus of elasticity/GPaRelative error/%
    Theoretical valueActual valueTheoretical valueActual valueStress/MPaModulus of elasticity/GPa
    Rectangle46.250.913.4611.010.1718.27
    Polygon47.451.913.2311.69.4912.32
    Circle0°49.252.813.812.17.3212.32
    Circle15°49.652.213.4012.75.655.22
    Circle30°48.051.413.2411.97.0810.12
    Circle45°47.350.913.1110.77.6118.38
    Circle60°46.550.712.8210.59.0318.10
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-01-25
  • 录用日期:  2022-04-01
  • 修回日期:  2022-03-29
  • 网络出版日期:  2022-04-26

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