将9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)与三羟甲基氧化磷(THPO)通过Atherton-Todd反应成功合成了新型含磷化合物DOPO-THPO,再以聚己内酯二元醇(PCL-1000)、异佛尔酮二异氰酸酯(IPDI)为主要原料,2,2-二羟甲基丙酸(DMPA)为亲水扩链剂,DOPO-THPO为小分子扩链剂,采用预聚体分散法成功制备了有机磷改性水性聚氨酯(DT-WPU)阻燃抑尘剂。利用FT-IR、¹HNMR、XRD、TG、SEM对产物进行表征分析,并对其阻燃性、热稳定性、抗风蚀性进行测试。结果表明,喷洒DT-WPU阻燃抑尘剂的煤粉(褐煤)干燥后可在表面形成一层牢固的胶膜,使煤粒紧密地粘结在一起,可有效防止煤尘污染;喷洒质量分数5% DT-WPU阻燃抑尘剂的煤样较喷洒水的煤样CO体积分数下降了38.3%,风蚀率降低了90.7%,失重50%时温度提高了40.1℃。

DOPO-THPO,a novel phosphorus-containing compound,is successfully synthesized through Atherton-Todd reaction between 9,10-dihydro-9-oxax-10-phosphorus-10-oxide (DOPO) and tris-(hydroxymethyl) phosphine oxide (THPO).An organophosphorus modified waterborne polyurethane (DT-WPU) flame retardant-dust suppressor is successfully prepared via prepolymer dispersion method using polycaprolactone diol (PCL-1000) and isophorone diisocyanate (IPDI) as main raw materials,2,2-dimethylolpropionic acid (DMPA) as hydrophilic chain extender and DOPO-THPO as small molecule chain extender.The products are characterized by means of FT-IR,¹H-NMR,XRD,TG and SEM,and its flame retardancy,thermal stability and wind erosion resistance are tested.The results indicate that coal powder (lignite) sprayed with DT-WPU flame retardant-dust suppressor can form a firm film on its surface after drying,making coal particles closely bond together,which can effectively prevent coal dust pollution.The concentration of CO in coal samples sprayed with 5% DT-WPU decreases by 38.3%,the wind erosion rate decreases by 90.7%,and the temperature increases by 40.1℃ when the weight loss reaches 50%.

高凯(1996-),男,硕士研究生,研究方向为高分子材料,798439411@qq.com