主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2020, Vol. 39 ›› Issue (6): 821-824.

• • 上一篇    下一篇

温敏性水凝胶制备及阻燃性能研究

马砺1 ，2 ，黄霄1 ，2 ，杨元博1 ，2 ，薛梦华1 ，2,范新丽1 ，2   

  1. （1. 西安科技大学 安全科学与工程学院，陕西 西安 710054；2. 西安科技大学 西部矿井开采及灾害防治教育部重点实验室，陕西 西安 710054）
  • 收稿日期:2020-02-11 出版日期:2020-06-15 发布日期:2020-06-15
  • 作者简介:马砺(1978-)，男，四川隆昌人，西安科技大学安全科学与工程学院教授，博士生导师，博士，主要从事消防安全科学与技术等教学与科研工作，陕西省西安市碑林区雁塔中路 58 号，710054。
  • 基金资助:
    国家重点研发计划项目（2018YFC0808104）

Preparation and flame retardant properties of temperature-sensitive hydrogels

MA Li1 ，2, HUAGN Xiao1 ，2, YANG Yuan-bo1 ，2 ，XUE Meng-hua1 ，2, FAN Xin-li1 ，2   

  1. (1. College of Safety Science and Engineering, Xi'an University of Science and Technology, Shaanxi Xi'an 710054, China; 2. Key Laboratory of Western Mine and Hazard Prevention, Ministry of Education, Xi'an University of Science and Technology, Shaanxi Xi'an 710054, China)
  • Received:2020-02-11 Online:2020-06-15 Published:2020-06-15

摘要： 采用甲基纤维素（MC）、聚乙二醇（PEG）、氯化钠（NaCl）为原料制备温敏性水凝胶，并在该体系中添加阻燃剂聚磷酸铵（APP），优选出材料体系质量分数配比为 MC∶PEG∶NaCl∶APP=1.3∶5.0∶5.0∶1.5。 采 用 试 管 倒 置 法 测 得 其 LCST 为58 ℃。利用傅里叶红外光谱仪（FT-IR）表征产物结构，借助热重分析仪和锥形量热仪分别测试水凝胶的热稳定性以及阻燃性能。实验结果显示,材料配比组分体系没有发生化学作用。对比未处理和水浸泡过的木板，经温敏性水凝胶浸泡后的木板点燃时间和热释放速率峰值出现时间均明显延迟。与未处理木板相比，经温敏性水凝胶浸泡后的木板点燃时间延迟 76 s，第一次和第二次热释放速率峰值出现时间分别延迟 83 s 和 269 s，表明制备的温敏性水凝胶具有良好的阻燃性能。

关键词: 温敏聚合物, 热稳定性, 甲基纤维素, 体积相转变, 阻燃性能

Abstract: The temperature- sensitive hydrogels were prepared by methyl cellulose (MC), polyethylene glycol (PEG) and sodium chloride (NaCl) as raw materials, and the flame retardant ammonium polyphosphate (APP) was added to this system. The mass fraction ratio of the material system was optimized as MC∶PEG∶NaCl∶APP = 1.3∶5.0∶5.0∶1.5. LCST was measured at 58 ℃ by tube inversion method. The structure of hydrogels was characterized by Fourier infrared spectroscopy (FT- IR), and the thermal stability and flame retardancy of hydrogels were measured by thermal gravimetric analysis (TG) and cone calorimeter. Experimental results showed that there is no chemical action in the mixture system of materials. Comparing with untreated boards and water- soaked boa-rds, the initiation time and peak occurrence time of the heat release rate of the board soaked in the temperature- sensitive hydrogel were significantly delayed. Compared with untreated wood, the ignition time of wood boards immersed in temperature- sensitive hydrogel was delayed by 76 s, the peak time of the first and second heat release rate was delayed by 83 s and 269 s, respectively, indicating that the temperature- sensitive hydrogel under the preparation system had good flame retardant performance.

Key words: temperature- sensitive polymer, thermal stability, methylcellulose, volume phase transition, flame retardant property

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