Creative Preparation of Bamboo Fiber Reinforced Composites with Homologous Bio-oil Modified Phenolic Resin
Fiber-reinforced resin composites have the advantages of lightweight and high performance,which are widely used in the industries of aerospace and wind power.Under the background of the"Bamboo as a Substitute for Plastic"Initiative,green composites made of bamboo fiber and bamboo derivatives have become a hot topic of bamboo processing and utilization.In this study,bamboo fibers and bio-oil phenolic resin are used to replace glass fibers and phenolic resin,a petrochemical material,and bamboo fiber-reinforced composites are prepared with bio-oil phenolic resin,focusing on the effect of different curing agents on the curing properties of the resin.Then the parameters of the hand lay-up process of the composite are optimized based on orthogonal tests.The results show that:1)The bio-oil phenolic resin that could be cured at low or medium temperatures is successfully prepared,with a viscosity of 300 mPa·s,a solid content of 45.15%,and a pH value of 10.91.The optimized mass ratio of the compound curing agent,i.e.,m(p-toluene sulfonic acid):m(hydrochloric acid):m(phosphoric acid):m(anhydrous ethanol),is 10∶1∶2∶4,the appropriate additive amount is 5%,and the gelation time is 26 min,which can better meet the process requirements of composites prepared by the hand lay-up method;2)With a 40%fiber/resin ratio,a curing time of 5 h,and a curing temperature of 70℃,the composites prepared have the flexural strength of 105.57 MPa,a tensile strength of 62.48 MPa,presenting excellent mechanic properties.The composites creatively prepared are green,low-carbon,lightweight,and high-strength and they are expected to be applied in the building material sector and industrial production such as bamboo construction,household,panels,and automotive/high-speed railway interiors.
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维普
