Thermally stable microencapsulated red phosphorus (MRP) was successfully synthesized via the in-situ polymerization technology using phenol-formaldehyde prepolymer (PFP) and red phosphorus (RP) powder as reactants and ammonium persulfate [(NH4)2S2O8] ammonium persulfate [(NH4)2S2O8] as the initiator.By investigating the effect of encapsulation conditions on MRP ignition point through ignition point test,the optimal encapsulation conditions were determined: (NH4)2S2O8 as catalyst at 2.5wt% of RP,solution pH controlled between 8.0～9.0,polyethylene glycol 400 (PEG400) as dispersant at 2.0g/L,reaction temperature of 65.0℃,and reaction time of 3.0h.The encapsulation efficacy was evaluated by scanning electron microscopy (SEM),X-ray photoelectron spectroscopy (XPS),Fourier-transform infrared spectroscopy (FT-IR).The results indicated that phenolic resin effectively encapsulated red phosphorus particles,forming microcapsules with varying degrees of agglomeration between particles,thus reducing the surface P content.After encapsulation,the moisture absorption rate of RP decreased greatly from 5.5% to 1.2%,and PH3 release amount decreased from 430.0mg/L to 2.8mg/L.
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基金资助
江苏省高等学校自然科学研究面上项目(23KJD430008);2022年度南京科技职业学院“科研北斗计划(2.0版)”项目(人才培育工程类)(00310211)
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