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基于生物涂层/相变微胶囊的储能砂浆力学及温控性能研究

张家玮 马建虎 黄玮 夏召来 杨利军 刘生纬

张家玮, 马建虎, 黄玮, 等. 基于生物涂层/相变微胶囊的储能砂浆力学及温控性能研究[J]. 复合材料学报, 2024, 42(0): 1-12.
引用本文: 张家玮, 马建虎, 黄玮, 等. 基于生物涂层/相变微胶囊的储能砂浆力学及温控性能研究[J]. 复合材料学报, 2024, 42(0): 1-12.
ZHANG Jiawei, MA Jianhu, HUANG Wei, et al. Mechanical and temperature control properties of energy storage mortar based on bio-coating/phase change microcapsules[J]. Acta Materiae Compositae Sinica.
Citation: ZHANG Jiawei, MA Jianhu, HUANG Wei, et al. Mechanical and temperature control properties of energy storage mortar based on bio-coating/phase change microcapsules[J]. Acta Materiae Compositae Sinica.

基于生物涂层/相变微胶囊的储能砂浆力学及温控性能研究

基金项目: 国家自然科学基金(52068043)
详细信息
    通讯作者:

    张家玮,博士,教授,博士生导师,研究方向为FRP加固混凝土耐久性、绿色节能建筑 E-mail: zhangjd@mail.lzjtu.cn

  • 中图分类号: TU578.1

Mechanical and temperature control properties of energy storage mortar based on bio-coating/phase change microcapsules

Funds: National Natural Science Foundation of China (52068043)
  • 摘要: 为研究生物涂层/相变微胶囊对水泥砂浆力学及温控性能的影响,将表面覆有聚多巴胺涂层的相变微胶囊(PD-PCM)引入水泥砂浆中制成储能砂浆。研究了不同PD-PCM掺量(5% ~ 20%)储能砂浆的微观结构、力学性能、热工性能和冬季低温环境下的温控性能。结果表明:储能砂浆的孔隙率随着PD-PCM掺量的增加而增大,20%掺量孔隙率增加23.2%;添加PD-PCM有效减缓了传统相变储能砂浆抗压强度的大幅下降,其5%和10%掺量较基准砂浆分别提高3.6%及3.8%,20%掺量仅下降16.8%;PD-PCM的添加改善了砂浆的热工性能,其导热系数随着PD-PCM掺量的增加而降低,热阻随着PD-PCM掺量的增加而提高,20%掺量导热系数降低25.8%,热阻提高38.9%;通过绝热箱实验可知,当PD-PCM掺量为20%时,其箱内谷值温度与时滞分别较基准水泥砂浆增加1.1℃和10 min。相变储能砂浆在满足力学性能要求的同时,又具有良好的热工性能和储能调温能力,在建筑调温等领域具有广阔的应用前景。

     

  • 图  1  储能砂浆温控性能试验装置示意图

    Figure  1.  Schematic diagram of energy storage mortar temperature control performance test device

    图  2  SEM图:(a)粉煤灰微孔漂珠;(b)具有聚多巴胺涂层的相变微胶囊

    Figure  2.  SEM images: (a) Fly ash microporous cenospheres; (b) Phase change microcapsules with polydopamine coating

    图  3  未封装和封装相变微胶囊XRD图谱

    Figure  3.  XRD patterns of unencapsulated and encapsulated phase change microcapsules

    图  4  未封装、封装相变微胶囊和微孔漂珠FT-IR图谱

    Figure  4.  FT-IR patterns of unencapsulated, encapsulated phase change microcapsules and microporous cenospheres

    图  5  石蜡及相变微胶囊DSC曲线

    Figure  5.  DSC curves of paraffin and phase change microcapsules

    图  6  相变微胶囊TG曲线

    Figure  6.  TG curve of phase change microcapsules

    图  7  基准水泥砂浆与储能砂浆SEM图像:(a) 0%;(b) 5%;(c) 10%;(d) 15%;(e) 20%;(f) 20%掺量中的破碎微胶囊

    Figure  7.  SEM images of reference cement mortar and energy storage mortar: (a) 0%; (b) 5%; (c) 10%; (d) 15%; (e) 20%; (f) Fragmented microcapsules in 20% dosage

    图  8  储能砂浆体积密度与开孔孔隙率较基准水泥砂浆的比率

    Figure  8.  Ratio of bulk density to open pore porosity of energy storage mortar relative to reference cement mortar

    图  9  (a) 砂浆固/液试样抗压强度;(b) 固/液试样28 days抗压强度变化率

    Figure  9.  (a) Compressive strength of mortar solid/liquid specimens; (b) Solid/liquid specimen 28 days compressive strength change rate

    图  10  各组砂浆热性能参数变化曲线

    Figure  10.  Change curve of thermal performance parameters of each group of mortar

    图  11  温控性能曲线:(a) 基准水泥砂浆;(b) 10%储能砂浆;(c) 20%储能砂浆

    Figure  11.  Temperature control performance curve: (a) Reference cement mortar; (b) 10% energy storage mortar; (c) 20% energy storage mortar

    表  1  砂浆配合比(kg/m3)

    Sample number Cement Water Medium sand Phase change microcapsule
    SJM25 -P0 450 300 1350.0 0
    SJM25 -P5 450 300 1282.5 26.6
    SJM25 -P10 450 300 1215 53.3
    SJM25 -P15 450 300 1147.5 79.9
    SJM25 -P20 450 300 1080 106.5
    Notes: SJM25-P0 is the benchmark mortar specimen without adding phase change microcapsules, No. SJM25-P5 is the mortar specimen prepared by replacing 5% of the volume of phase change microcapsules, and so on.
    下载: 导出CSV

    表  2  各组砂浆试样最终用水量与固体成分重量之比以及测试的砂浆稠度

    Table  2.   Ratio of final water consumption to weight of solid components and consistency of mortar tested for each group of mortar specimens

    Mortar
    composition
    Water to
    solids ratio
    Consistency at
    fresh state /mm
    0% 0.166 162
    5% 0.171 165
    10% 0.180 167
    15% 0.191 166
    20% 0.202 170
    下载: 导出CSV

    表  3  100 g PD-PCM经历多次升-降温循环后其质量损失结果

    Table  3.   Results of mass loss of 100 g of PD-PCM after undergoing several ascending-descending temperature cycles

    100 gNumber of cycles
    G1G2G3
    601202006012020060120200
    Mass/g99.5499.599.4499.5599.4999.4599.5599.599.45
    Mass loss rate0.46%0.50%0.56%0.45%0.51%0.55%0.45%0.50%0.55%
    Notes: G1 is the first set of experiments, and the other numbers follow suit.
    下载: 导出CSV

    表  4  基准水泥砂浆与储能砂浆试样进行真空饱和度测试所测得的物理性能(变异系数)

    Table  4.   Physical properties measured by vacuum saturation testing of reference cement mortar and energy storage mortar specimens (Coefficient of variation)

    Property No. of tests Mortar composition
    0% 5% 10% 15% 20%
    Bulk density ρ/(kg·m−3) 3 2.13
    (0.53%)
    2.12
    (0.22%)
    2.06
    (0.21%)
    2.01
    (0.44%)
    1.97
    (0.12%)
    Open porosity p/% 3 16.65
    (5.24%)
    17.67
    (1.37%)
    19.51
    (1.29%)
    19.81
    (2.00%)
    20.51
    (0.96%)
    下载: 导出CSV

    表  5  各组砂浆的导热系数与热阻(变异系数)

    Table  5.   Thermal conductivity and thermal resistance of each group of mortar (coefficient of variation)

    Property No. of
    tests
    Mortar composition
    0% 5% 10% 15% 20%
    Thermal
    conductivity-
    λ/(W·(m·K)−1)
    3 1.63
    (1%)
    1.32
    (2%)
    1.5
    (2%)
    1.24
    (1%)
    1.21
    (2%)
    Thermal
    resistance-
    R/((m2∙K)·W−1)
    3 0.018
    (2%)
    0.023
    (2%)
    0.020
    (1%)
    0.024
    (1%)
    0.025
    (2%)
    下载: 导出CSV
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  • 收稿日期:  2024-01-22
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