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改性玄武岩/水凝胶复合涂层对木材阻燃性能的影响

王驰 刘静 张梦颖 袁光明 葛海林

王驰, 刘静, 张梦颖, 等. 改性玄武岩/水凝胶复合涂层对木材阻燃性能的影响[J]. 复合材料学报, 2024, 42(0): 1-10.
引用本文: 王驰, 刘静, 张梦颖, 等. 改性玄武岩/水凝胶复合涂层对木材阻燃性能的影响[J]. 复合材料学报, 2024, 42(0): 1-10.
WANG Chi, LIU Jing, ZHANG Mengying, et al. Modified basalt/hydrogel composite coating study on the influence of flame retardancy of wood[J]. Acta Materiae Compositae Sinica.
Citation: WANG Chi, LIU Jing, ZHANG Mengying, et al. Modified basalt/hydrogel composite coating study on the influence of flame retardancy of wood[J]. Acta Materiae Compositae Sinica.

改性玄武岩/水凝胶复合涂层对木材阻燃性能的影响

基金项目: 国家自然科学基金(32171708、31770606);国家重点研发计划项目(2019YFE0114600)
详细信息
    通讯作者:

    袁光明,博士,教授,博士生导师,研究方向为生物质复合材料、木材功能性改良, E-mail:ygm@csuft.edu.cn

  • 中图分类号: S785; TQ127.1+1; TB332

Modified basalt/hydrogel composite coating study on the influence of flame retardancy of wood

Funds: National Natural Science Foundation of China (No.32171708; No.31770606); National Key Research and Development Program of China (No.2019TFE0114600)
  • 摘要: 以加入了次磷酸铝(AHP)的聚乙烯醇(PVA)/壳聚糖(CS)作为水凝胶基质,经NaOH预处理、KH550接枝改性和植酸金属化合物共沉淀后的玄武岩(BS)作为阻燃填料,制备了BS-PA-Al、BS-PA-Ni和BS-PA-Zn水凝胶阻燃涂层材料。将三种涂层涂覆到木材表面后,分别对其进行了热重测试、锥形量热测试和垂直燃烧实验,分析改性玄武岩/水凝胶复合涂层对木材阻燃和力学性能的影响。结果表明:由于可燃气体的稀释和炭层致密性的增加,BS-PA-Al、BS-PA-Ni和BS-PA-Zn阻燃涂层对木材的阻燃性能有显著地提升;其中,BS-PA-Ni的阻燃性能和机械性能达到最佳,其UL-94测试达V-0级;且相较于空白组木材,残炭率增加至27.3%,其pHRR、THR和TSP分别降低64.2%、32.7%和51.3%;此外,当涂层厚度为300 μm时,其BS-PA-Ni的力学性能(抗拉强度)增加至80.4%,水凝胶在木材上的附着强度达到3.4 MPa。

     

  • 图  1  改性玄武岩的制备工艺

    Figure  1.  Preparation process of modified basalt

    图  2  样品的SEM图:BS(a);NaOH蚀刻后的BS(b);BS-PA-Al(c);BS-PA-Al的和EDX能谱图(d);BS-PA-Ni(e);BS-PA-Ni的EDX能谱图(f);BS-PA-Zn(g);BS-PA-Zn的EDX能谱图(h)

    Figure  2.  SEM of modified basalt: unmodified basalt (a); NaOH etched basalt (b); Aluminum phytate modified basalt (c); Aluminum phytate modified basalt and element distribution (d); Nickel phytate modified basalt (e); Nickel phytate modified basalt and element distribution (f); Zinc phytate modified basalt (g); Zinc phytate modified basalt and element distribution (h);

    图  3  改性玄武岩傅里叶红外光谱图

    Figure  3.  FTIR diagram of modified basalt

    图  4  水凝胶阻燃涂料热重曲线:热重曲线(a)和热重微分曲线(b)

    Figure  4.  Thermogravimetric curves of hydrogel flame retardant coating: TG (a) and DTG (b)

    图  5  水凝胶阻燃涂料的热释放速率(a)、热释放总量(b)、产烟速率(c)以及产烟总量(d)

    Figure  5.  HRR(a), THR(b), SPR(c) and TSP(d) of hydrogel flame retardant coating

    图  6  水凝胶阻燃涂料的力学性能:未涂覆和涂覆木材的抗拉强度(a)和涂层附着力测试图(b)

    Figure  6.  Mechanical properties of hydrogel flame retardant coating: Tensile strength (a) and coating adhesion test diagram (b) of uncoated and coated wood

    图  7  水凝胶阻燃涂料的阻燃机制

    Figure  7.  Hydrogel flame retardant coating flame retardant mechanism diagram

    表  1  水凝胶阻燃涂料配方

    Table  1.   Hydrogel flame retardant coating formula

    Sample Hydrogel/wt% AHP/wt% Modified BS/wt%
    Control 100 0 0
    BS-PA-Al 90 3 7
    BS-PA-Ni 90 3 7
    BS-PA-Zn 90 3 7
    Note: Hydrogel—The amount of hydrogel in the composite coating; AHP—The amount of aluminum hypophosphite in the composite coating; Modified BS—The amount of modified basalt in the composite coating.
    下载: 导出CSV

    表  2  复合涂料的主要热重分析数据

    Table  2.   Main TGA data of composite coatings

    Sample T10%/°C T50%/°C Residue/%
    Control 164.36 327.91 3.12
    BS-PA-Al 129.07 339.87 22.4
    BS-PA-Ni 123.64 382.43 27.3
    BS-PA-Zn 116.88 351.55 20.8
    Notes: T10%Temperatureat5% mass loss; T50%—Temperature at5% mass loss; Residue—Residual carbon content.
    下载: 导出CSV

    表  3  水凝胶阻燃涂料锥形量热主要数据

    Table  3.   Hydrogel flame retardant CCT main data

    Sample TTI/s pHRR/
    (kW·m−2)
    THR/
    (MJ·m−2)
    TSP/
    m2
    Pure wood 12 572.90 44.17 1.99
    Control 47 294.50 35.80 2.91
    BS-PA-Al 22 210.51 33.51 0.89
    BS-PA-Ni 27 205.38 29.74 0.97
    BS-PA-Zn 21 240.68 35.44 1.37
    BS-PA-Ni (dry) 17 397.90 39.14 3.16
    Notes: TTIThe time to ignition of wood; pHRR—Peak heat release rate; THR—Total heat release; TSP—Total smoke release.
    下载: 导出CSV

    表  4  水凝胶阻燃涂料的垂直燃烧数据

    Table  4.   Vertical combustion data of hydrogel flame retardant coating

    SampleT1/sT2/sUL-94Dripping or not
    Pure wood//NRYes
    Control221V-1No
    BS-PA-Al00V-0No
    BS-PA-Ni00V-0No
    BS-PA-Zn313V-1No
    Notes: T1—The first fire of wood; T2—The second fire of wood; UL-94—UL-94 combustion rating of wood; Dripping or not—Whether the coating drips during wood burning.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-04-26
  • 修回日期:  2024-06-15
  • 录用日期:  2024-06-21
  • 网络出版日期:  2024-07-03

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