Preparation and performances of bacterial cellulose/thermoplastic polyurethane composite aerogel fibers
Biobased organic material bacterial cellulose(BC)/thermoplastic polyurethane elastomer(TPU)composite aerogel fibers were synthesized from wet spinning of BC doped with TPU,and characterized by FTIR,XRD,TG,SEM,automatic specific surface porosity analyzer and monofilament strength meter for structure and property analysis test.The influence of mass fraction(based on the mass of spinning solution,the same below)of BC and TPU on the properties of composite aerogel fibers was further evaluated.The results showed that the BC/TPU composite aerogel fibers exhibited porous structure,with a specific surface area of 121 m2/g and density of 0.464 g/cm3,good thermal insulation and mechanical properties.When the mass fractions of BC and TPU was 2.0%and 1.0%,respectively,the obtained BC/TPU composite aerogel fiber displayed the best tensile properties,with a breaking strength of 24.69 MPa and an elongation at break of 38.54%.The temperature of fiber only increased 12.16℃when the temperature of hot stage increased from 40℃to 100℃.
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