树脂类型对低密度炭/炭硬化保温材料性能的影响

Effect of Resin Type on the Performance of the Low-density Carbon/Carbon Insulation Materials

本文研究了用酚醛树脂、环氧树脂和丙烯酸树脂三种树脂溶液作为浸渍剂,以针刺整体毡作为预制体,通过树脂浸渍、固化、炭化工艺硬化低密度炭/炭保温材料,并对制备的低密度炭/炭保温材料进行密度、导热系数、灰分、微观结构以及表观质量进行了对比分析。结果表明:酚醛树脂作为浸渍剂硬化针刺整体毡坯体炭化后,硬化效果好,无异味,制备的低密度炭/炭保温材料密度、导热系数和灰分都偏低。环氧树脂制备的保温材料虽然硬化效果较好,但是,树脂有刺激性气味且造孔能力差,导致材料的密度、导热系数以及灰分较大,而丙烯酸树脂作为浸渍剂制备的保温材料硬化效果差且有异味,不利于低密度炭/炭保温材料的工业化应用。

This paper studies three resin solutions （phenolic resin, epoxy resin and acrylic resin） as impregnant, needled felt carbon fiber as the preform. Then the low-density carbon / carbon （LD-C/C） insulation materials were made by resin impregnation, curing and carbonization pro- cess. Furthermore, the density, thermal conductivity, ash content, microstructure and surface quality of the low-density carbon/carbon insulation materials are compared and analyzed. The results show that the phenolic resin of low-density carbon/carbon insulation material have the better hardening effect to the carbon fibers, no peculiar smell, lower thermal conductivity and ash content. Epoxy resin of low-density carbon/ carbon insulation material have the better hardening effect to the carbon fibers, but the resin with irritating smell and pore forming ability is poor, which causing the material＇s density, thermal conductivity and ash content are higher. Acrylic resin as impregnating agent and preparation of low-density carbon/carbon insulation material, which reduce the poor hardening effect to the carbon fibers and the resin has peculiar smell. Those characters of the resin are the disadvantage to the industrial application and to manufacturing low density carbon / carbon thermal insulation material.