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    徐开蒙, 苏柑锚, 柴希娟, 等. 思茅松木材表面憎水憎油功能化改性研究[J]. 华南农业大学学报, 2022, 43(1): 13-19. DOI: 10.7671/j.issn.1001-411X.202105036
    引用本文: 徐开蒙, 苏柑锚, 柴希娟, 等. 思茅松木材表面憎水憎油功能化改性研究[J]. 华南农业大学学报, 2022, 43(1): 13-19. DOI: 10.7671/j.issn.1001-411X.202105036
    shu
    XU Kaimeng, SU Ganmao, CHAI Xijuan, et al. Functional modification of hydrophobicity and oleophobicity for wood surface of Pinus kesiya var. langbianensis[J]. Journal of South China Agricultural University, 2022, 43(1): 13-19. DOI: 10.7671/j.issn.1001-411X.202105036
    Citation: XU Kaimeng, SU Ganmao, CHAI Xijuan, et al. Functional modification of hydrophobicity and oleophobicity for wood surface of Pinus kesiya var. langbianensis[J]. Journal of South China Agricultural University, 2022, 43(1): 13-19. DOI: 10.7671/j.issn.1001-411X.202105036
    shu

    思茅松木材表面憎水憎油功能化改性研究

    Functional modification of hydrophobicity and oleophobicity for wood surface of Pinus kesiya var. langbianensis

      摘要
    • 摘要:
      目的  提高实木制品在油水共存环境下的尺寸稳定性，探索实木材料在公共餐饮服务区家具、食品与调料包装、厨卫家具和客餐厅木质用品等领域的应用潜力。
      方法  将甲基三甲氧基硅烷(MTMS)与盐酸按体积比 4︰1混合，在冰浴中进行超声水解后对思茅松Pinus kesiya var. langbianensis木材进行浸渍改性处理，对比研究MTMS不同预水解反应时间(0、30、60、120、180 和240 min)对思茅松木材表面憎水憎油特性的影响，通过扫描电镜、接触角分析仪、红外光谱、X射线光电子能谱和热失重分析仪对改性前后木材结构组成和特性变化进行表征。
      结果  经MTMS改性处理后，思茅松木材表面键合了Si—CH3、Si—O—Si、Si—OH等低表面能的基团，改性思茅松从对照样表面对水和油完全浸润转变为具有憎水憎油的双憎功能型木材，MTMS改性后思茅松木材表面水接触角的变化明显大于油接触角的。随着预水解时间从0延长至240 min，水接触角从73.60°升高至88.31°，而油接触角仅在50.50°附近有微小波动。MTMS改性处理后，木材热稳定性提升，质量残余率升高，最大热降解温度升高了6 ℃，整体吸水、吸油率明显降低，终吸水、吸油率分别降低了58.83%和83.90%。当MTMS预水解时间为30~60 min时，MTMS对木材表面双憎功能效果及浸渍有效性最佳。
      结论  简便易行的MTMS改性为憎水憎油功能型木材的开发与利用奠定了理论基础，提供了技术支撑。

       

      Abstract:
      Objective  To improve the weak dimensional stability of solid wood products in the environment where oil and water coexist, and further explore the potential application of solid wood in the various fields of public catering service furniture, food and seasoning packaging, kitchen and bathroom furniture as well as wooden products in living- and dining-room.
      Method  Methyltrimethoxysilane (MTMS) and hydrochloric acid were mixed according to the volume ratio of 4︰1. After ultrasonic hydrolysis in an ice bath, Pinus kesiya var. langbianensis wood was modified by impregnation. The effects of different MTMS pre-hydrolysis reaction time (0, 30, 60, 120, 180 and 240 min) on hydrophobic and oleophobic characteristics of wood surface were studied. The changes in wood structure and properties before and after modification were comprehensively characterized by scanning electron microscope, contact angle analyzer, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermal gravimetric analyzer.
      Result  The surface of wood was bonded with low surface energy groups of Si—CH3, Si—O—Si, Si—OH etc. after modification, and their surface properties were changed from complete infiltration by water and oil to the dual-hydrophobic and oleophobic performance. Furthermore, the water contact angle change of modified wood surface was significantly greater than that of oil contact angle. The water contact angle increased from 73.60° to 88.31° with the increase of the pre-hydrolysis time from 0 to 240 min, while the oil contact angle only had a slight fluctuation around 50.50°. The thermal stability of the MTMS - modified wood was also promoted, the mass residual rate increased, and the maximum thermal degradation temperature was raised by 6 ℃. The final water and oil absorption rate were significantly reduced by 58.83% and 83.90%, respectively. There was an optimum surface dual-hydrophobic and oleophobic performance with the effective impregnation when the pre-hydrolysis time was 30–60 min.
      Conclusion  The facile modification of MTMS provides the theoretical foundation and technical support for the development and utilization of novel hydrophobic and oil-repellent functional wood.

       

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