Research On Fabrication And Properties Of Layered Calcium Carbonate Or Molybdenum Disulfide Composite Fibers

Layered composite materials are consist of layered inorganic and polymer, exhibiting excellent mechanical property due to its obvious layered structure. Functional composite materials could be applied in biology, catalytic, electrical, photoelectric, optical properties and so on. Nowadays for layered materials, composite materials can be applied in ultrahigh mechanical properties, flame retardant materials, gas barrier materials, supercapacitors and sensors, and so on. Although layered composite materials have many applications, the main performance forms of layered materials are composite films and composite fibers. And, the research of composite fibers was main concentrated on graphene, while the research of other brittle layered composite fibers is little.We fabricated layered calcium carbonate/poly ving alcohol composite fibers by wet spinning technique, and got amounts of continuous composite fiber with high tensile strength. The mechanical property of fibers increase maximum and then decrease with increasing concentration of calcium carbonate. The maximum tensile strength reaches 131.4 MPa in 15% calcium carbonate content, the strain is 40% at this content. Both tensile strength and strain can be increased of 30% under the enhancing of boric acid. In order to improve the mechanical property deeply, composite fibers are spiraled into springs by second quadratic optimization in structure, the tensile strength of composite spring in 33% calcium carbonate content are 167 MPa, and the strain and toughness are 200% and 186.4 MJ/m3, respectively. Compared with same content fibers, the tensile strength, strain and toughness of springs have been increased of 138.6%, 400% and 841.4%, respectively.Besides, we also fabricated layered graphene/molybdenum disulfide composite fibers with 9.51% increases of photocurrent under the irradiation of Xenon lamp which is twice of pure graphene fiber by same method. As the current of Xenon lamp increases, the optical responses of graphene/molybdenum disulfide composite fiber increase lineally, but it is be free of voltage.