摘要
采用一锅法原理,通过超声波辅助硫酸降解竹浆纤维制备微纳纤丝,并用该多尺度微纳纤丝对环氧树脂(EP)固化剂进行增韧改性。研究结果表明:该方法可在不降低EP固化样片力学强度的前提下,显著提高其柔韧性;当w(硫酸)=40%(相对于水和硫酸总质量而言)、超声时间为1.5 h和w(微纳纤丝)=0.75%(相对于固化剂质量而言)时,EP固化样片的力学性能相对最大,其拉伸强度、弯曲强度和冲击强度分别提高了1.48%、2.46%和93.34%。
The micro-nano fibril was prepared by one-pot principle when bamboo pulp fiber was degraded byultrasonic assisted sulfuric acid,and the epoxy resin（EP）curing agent was toughened and modified by multi-scalemicro- nano fibrils. The research results showed that this method could obviously increase the flexibility of EPcuring samples,whose mechanical strength wasn＇t be reduced. The mechanical properties of EP curing sampleswere relatively maximal because its tensile strength,bend strength and impact strength were respectively increasedby 1.48%,2.46% and 93.34% when mass fraction of sulfuric acid was 40% in total water and sulfuric acid,ultrasonic time was 1.5 h,and mass fraction of micro-nano fibrils was 0.75% in curing agent.
出处
《中国胶粘剂》
CAS
北大核心
2016年第4期1-5,共5页
China Adhesives
基金
国家林业局948项目(2014-4-30)
国家自然科学基金项目(31370560
31170520)
关键词
微纳纤丝
多尺度
增韧
环氧树脂
固化剂
micro-nano fibril
multi-scale
toughening
epoxy resin（EP）
curing agent
