摘要
以核桃壳经苯酚液化后的液化产物、硼酸、多聚甲醛为原料,通过固相法合成硼改性核桃壳生物基酚醛树脂(BWPF),用傅立叶红外光谱(FTIR)分析其结构,扫描电镜(SEM)观察其自然断面形貌,差示扫描量热法(DSC)与热重分析法(TG)分析其热性能。结果表明:硼酸与核桃壳液化产物中的酚羟基发生反应生成新的交联,随着硼酸加入量的增加,硼改性核桃壳生物基酚醛树脂韧性和固化温度得到提高;随着硼酸加入量的增加、反应温度的提高和反应时间的延长,硼改性核桃壳生物基酚醛树脂炭残余质量有所增加,耐热性能提高。
Boron-modified walnut shell biomass-based phenol-formaldehyde resins (BWPF)were synthesized by solid-phase generation method with the liquefied products of walnut shell in phenol,plus boric acid and paraformaldehyde as raw materials.The structure and properties of BWPF were analyzed by Fourier transform infra-red spectra (FTIR),the morphology of its natural cross section was observed by scanning electron microscope (SEM),whereas its thermal properties were analyzed by differential scanning calorimeter (DSC)and thermogravi-metric analysis (TG).The results showed that a new cross-linked bond such as B-O was formed in the process when boric acid reacted with the phenolic hydroxyl groups in the liquefied products of walnut shell.With the incre-ment of boron content,the toughness and curing temperature of BWPF were both promoted.The carbon residual mass and thermal stability of the resins were all increased with the increasing of the boric acid amount,reaction temperature and reaction time duration.
出处
《西南林业大学学报(自然科学)》
CAS
2014年第2期95-99,共5页
Journal of Southwest Forestry University:Natural Sciences
基金
国家自然科学基金项目(31160147)资助
国家林业公益性行业科研专项项目(201104046)资助
关键词
硼
核桃壳
酚醛树脂
生物基
改性
boron
walnut shell
phenol-formaldehyde resins
bio-base
modification