Effect of the Special Structure of Crab Shell Powder on the Structure and Properties of Castor Oil-based Composites
Crab shell is a common aquatic waste with characteristics such as hardness and numerous functional groups.It is found that there is a good prospect in the development of crab shells as functional fillers for the preparation of polymer composites.In this experiment,crab shell powder and castor oil-based polyurethane prepolymer(COPU)was combined to prepare the composite material(COS-50)with the filler addition as high as 50%.castor oil-based polyurethane composite(COC-50)reinforced with calcium carbonate powder was also prepared using calcium carbonate powder as filler as a control group to investigate the effect of crab shell powder structure on the material properties.The interfacial structure and various properties of the composites were analyzed using infrared spectroscopy,SEM,TGA,and tensile testing.It is found that the reactive groups contained in the unique chitin-protein fiber mesh structure of crab shells chemically react with the composites to form bonds,whose the mechanical properties performed well,with tensile strength of 34.3 MPa and modulus of elasticity of 5454.0 MPa,and good interfacial compatibility.
crab shellcastor oilpolyurethane prepolymercomposite material
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