工业木质素用于制造木陶瓷

Investigation on Preparing Woodceramics from Industrial Lignin

以工业木质素为原料制造新型多孔炭材料木陶瓷,并对产品得率、强度及微观结构形态进行了研究。结果表明,随着酚醛树脂用量的增加,木质素陶瓷的质量得率和体积得率略有增加,抗弯强度大大提高,抗压强度也提高明显。当木质素与酚醛树脂质量比为1．33∶1时,木质素陶瓷的抗弯强度为1．88MPa,抗压强度达3．86kN/cm^2。微观结构分析表明,在木质素—酚醛树脂复合板中有团块状木质素夹杂出现,高温烧结后样品孔隙结构增多。高温烧结前后样品的比表面积分别为0．2448m^2/g和0．9742m^2/g。

Industrial lignin was used to prepare woodceramics （WCS） which is a new porous material. The yield, strength and micro-structure morphology of the WCS were determined. The results showed that,with the increasing of PF resin dosage, mass and volume yields of the WCS were slightly increased,its bend strength was largely improved, and compress strength was obviously enhanced. When the mass ratio of lignin to PF resin was 1.33：1,its bend strength was 1.88MPa and its compress strength was 3.86kN/cm^2. Lignin conglomeration in lignin-PF resin composite was seen with SEM and the porous structure of the sample was increased after sintering under high temperature. The specific surface areas of the sample before and after sintering （lignin-PF composite and the woodce- ramics） were 0. 244 8m^2/g and 0. 974 2m^2/g respectively.