| 纳米BN与ZnO协效阻燃木粉-聚氯乙烯复合材料 |
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| 引用本文： | 段聪,房轶群,王奉强,于云鹏,权大通,张显权,王清文.纳米BN与ZnO协效阻燃木粉-聚氯乙烯复合材料[J].复合材料学报,2021,38(4):1147-1154. |
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| 作者姓名： | 段聪 房轶群 王奉强 于云鹏 权大通 张显权 王清文 |
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| 作者单位： | 东北林业大学生物质材料科学与技术教育部重点实验室,哈尔滨150040;华南农业大学材料与能源学院,广州510642 |
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| 基金项目： | “十三五”国家重点研发计划项目(2019YFD1101203)；国家自然科学基金(31870547) |
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| 摘 要： | 为提高木粉-聚氯乙烯(WF-PVC)木塑复合材料的阻燃抑烟性能，本文将纳米BN与ZnO加入到WF-PVC木塑复合材料中，通过热压成型方法制备了阻燃WF-PVC木塑复合材料，研究了复合材料热分解、燃烧性能和力学性能。热重分析(TG)测试表明，BN和ZnO的加入一定程度上降低了复合材料的初始热分解温度，但明显提高了复合材料的热解残余物质量，BN和ZnO的质量比为1∶2时，复合材料的残炭量增加了21.7%。锥形量热仪燃烧测试表明，纳米BN和ZnO的加入能够显著提高复合材料的阻燃性能，与纯WF-PVC相比，BN与ZnO的加入能有效降低WF-PVC复合材料燃烧时的热释放和烟释放，复合材料的总热释放量和总烟气释放量最高分别降低18.2%和48.9%。通过万能力学试验机对材料进行力学性能测试，结果表明阻燃剂的加入一定程度上降低了复合材料的力学性能，对阻燃剂进行一定比例的复配，可有效减少对复合材料力学性能的损害，单独添加ZnO时，复合材料弯曲强度降低了29.5%，而BN和ZnO以2∶1的质量比复配时，复合材料的弯曲强度降低了9.9%。
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| 关 键 词： | 聚氯乙烯 BN ZnO 阻燃 抑烟 |
| 收稿时间： | 2020-05-28 |
Synergistic flame retardancy of nano-BN and ZnO on wood flour-polyvinyl chloride composites |
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| Affiliation: | 1.Key Laboratory of Bio-based Materials Science and Technology, Northeast Forestry University, Harbin 150040, China2.School of Materials and Energy, South China Agricultural University, Guangzhou 510642, China |
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| Abstract: | The effects of the nano BN and ZnO on the thermal decomposition, combustion and mechanical properties of wood flour-polyvinyl chloride (WF-PVC) composites were investigated. The flame retarded WF-PVC composites with nano-BN and ZnO were prepared by hot pressing. Thermogravimetric analysis (TG) test results show that the addition of BN and ZnO reduces the initial thermal degradation temperature of the composites, while significantly increases the pyrolysis residues of the composites. When the mass ratio of BN to ZnO is 1∶2, the residues content of the composites increases by 21.7%. The cone calorimeter combustion test results show that the addition of nano-BN and ZnO significantly improves the flame retardant properties of the composites. Compared with the pure WF-PVC, the addition of BN and ZnO effectively decreases the heat release and smoke release during combustion of the composites, the total heat release and total smoke emission are decreased by 18.2% and 48.9%, respectively. The mechanical properties of the composites were tested by the universal mechanical testing machine. The results show that the addition of the flame retardants has some negative effects on the mechanical properties of the composites. However, the flame retardants were compounded in a certain proportion, which could effectively reduce the damage to the mechanical properties of the composites. The flexural strength of the composites is reduced by 29.5% when the ZnO is added alone, while the flexural strength of the composites is decreased by 9.9% when the mass ratio of BN to ZnO is 2∶1. |
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