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 ›› 2023, Vol. 42 ›› Issue (9): 1280-1286.

• • 上一篇    下一篇

席夫碱包覆植酸锌改性DOPO在环氧树脂中的阻燃作用

孔庆红, 黄帅, 柴惠钰, 刘宏   

  1. （江苏大学 环境与安全工程学院，江苏 镇江 212013）
  • 出版日期:2023-09-15 发布日期:2023-09-15
  • 作者简介:孔庆红（1977- ），女，江苏大学环境与安全工程学院副教授，博士，主要从事清洁高效阻燃纳米复合材料的研究，江苏省镇江市学府路301号，212013。

Flame retardancy of DOPO modified by zinc phytate coated with Schiff base in epoxy resin

Kong Qinghong, Huang Shuai, Chai Huiyu, Liu Hong   

  1. (School of the Environment and Safety Engineering, Jiangsu University, Jiangsu Zhenjiang 212013, China)
  • Online:2023-09-15 Published:2023-09-15

摘要： 以9，10-二氢-9-氧杂-10-磷杂菲-10-氧化物（DOPO）、3,4-二羟基苯甲醛和对苯二胺为原料，应用一锅法合成了含磷、氮的化合物PAPDO，并利用原儿茶醛的酚羟基与金属离子之间的作用力，将PAPDO包覆在植酸锌（ZnPA）表面制备出杂化阻燃剂（ZnPA@PAPDO）。以ZnPA@PAPDO为阻燃剂，双酚A型环氧树脂（EP）为基材，DDM为环氧固化剂，制备了阻燃环氧固化物EP/ZnPA@PAPDO，研究了ZnPA@PAPDO对EP阻燃性能的影响。热重结果显示:ZnPA@PAPDO的加入使复合材料的起始分解温度提前，促进聚合物成炭，表面形成炭层可以有效保护基体；ZnPA@PAPDO的加入可以增加高温时的残余量，EP/8% ZnPA@PAPDO的残留量增加了31.0%。另外，ZnPA@PAPDO的添加使EP复合材料的阻燃性能大大提高，EP/8%ZnPA@PAPDO的t1+t2为11.6 s，达到V-1级别，LOI值为32.8%。EP/ZnPA@PAPDO优异的热性能和阻燃性能归因于有机焦炭和金属保护层的双层阻隔作用、磷氮协效作用和自由基猝灭作用。

关键词: 环氧树脂, 阻燃性能, DOPO, 纳米杂化

Abstract: A compound (PAPDO) containing phosphorus and nitrogen was synthesized from 9, 10-dihydro-9-oxa-10vphosphozaphene-10-oxide (DOPO), 3, 4-dihydroxybenzaldehyde and p-phenylenediamine in a one-pot method. A hybrid flame retardant (ZnPA@PAPDO) was prepared by coating PAPDO on zinc phytate using the force between the phenol hydroxyl group of protoca-techualdehyde and metal ions. EP/ZnPA@PAPDO was prepared with ZnPA@PAPDO as the flame retardant, epoxy resin (EP) as the base material and diaminobenzene methane (DDM) as the epoxy curing agent. The effect of ZnPA@PAPDO on the flame retardant property of EP was studied. Thermogravimetric results showed that the addition of ZnPA @ PAPDO advanced the initial decomposition temperature of the composite, promoted the charring of the polymer and formed a char layer on the surface to effectively protect the matrix. The addition of ZnPA@PAPDO can increase the residual amount at high temperature, and the residual amount of EP/8% ZnPA@ APDO increased by 31.0%. In addition, the addition of ZnPA@PAPDO greatly improved the flame retardant property of EP. The t1+t2 of EP/8% ZnPA@PAPDO is 11.6 s, reaching V-1 level, and the LOI value is 32.8%. The excellent thermal and flame retardant properties of EP/ZnPA@PAPDO are attributed to the double barrier action of organic coke and metal protective layer, phosphorous nitrogen synergism and free radical quenching.

Key words:  epoxy resin, flame retardant property, DOPO, nano hybridization