熔喷酚醛非织造材料制备及其阻燃隔热性能研究OA

In this paper,phenolic resin was selected as the raw material,and the melt-blown method and chemical crosslinking curing were employed to prepare phenolic resin melt-blown nonwovens(PRMB).The in-fluence of spinning process on the morphology and structure of PRMB was systematically investigated,and their flame retardant and thermal insulation properties were studied.The results indicated that as the hot air tempera-ture(125～145℃)and draft air pressure(20～30 kPa)gradually increased,the thickness and fiber diameter gradually decreased.When the receiving distance increased from 20 cm to 40 cm,the thickness and fiber diame-ter gradually increased.The optimal process for preparing PRMB were explored as follows:the hot air tempera-ture was controlled at 130～135℃,the draft air pressure was 20 kPa,and the receiving distance was adjusted according to the thickness requirements of the sample.The initial decomposition temperature of PRMB was grea-ter than 300℃in a nitrogen atmosphere and a residual content was 56.44 wt%at 800℃,demonstrating excel-lent thermal stability.At room temperature and atmospheric pressure,PRMB(5 mm thickness)had a thermal conductivity of 0.0326 W·m-1·K-1 and a limiting oxygen index(LOI)of 35.3%,exhibiting excellent flame retardant and thermal insulation properties.The research provides a theoretical basis for the preparation of phe-nolic-based melt-blown nonwovens and expands the application prospects of melt-blown technology in the field of flame retardant and thermal insulation.