Research And Application Exploration On Spinnability Of PBS/PBAT Conductive Blend Syste

The research and development of biodegradable materials and their application systems have attracted a great deal of attention in the scientific and technological communities of the world as a result of the accelerated development of society and the rising awareness of environmental pollution.In particular,the development and application of biodegradable fibers and functional fibers,such as PLA,PBS,and PBAT have become the research hotspot of new functional fibers.Blends of PBS,PBAT and carbon black(CB)nanoparticles were prepared by the melt blending process.The spinnability of the blends was investigated in order to develop conductive functional fibers with wide application prospects.In order to improve the blending performance of CB nanoparticles,the feasibility of modifying the surface of CB nanoparticles with Meldrum’s acid was explored.The results show that the content of oxygen-containing groups such as O-C=O bond and C-O bond on the surface of CB nanoparticles can be effectively increased by Meldrum’s acid,which increases the O/C atomic ratio from 0.01 to 0.08,and the surface morphology and structure of the resulting modified CB nanoparticles(namely m-CB)are not significantly altered.Based on the surface energy of nanoparticles and polymers,as well as the impact of surface energy on the wetting coefficient and thermodynamic adhesion work,the selectivity of carbon black nanoparticles(m-CB)treated with Meldrum’s acid in PBS/PBAT blends was simulated,and predicted.The results demonstrate that PBAT has greater wetting advantages with CB and m-CB nanoparticles,and the surface modification can effectively enhance the thermodynamic adhesion between carbon black nanoparticles and polymer,which provides a theoretical basis for the design of the blending system.To further investigate the selectivity of carbon black nanoparticles in PBS/PBAT incompatible blends,three different melt blends were designed:(1)PBS/PBAT/CB;(2)PBAT/CB+PBS;(3)PBS/CB+PBAT,and prepared materials with varying CB(m-CB)content.Nanoparticles are preferentially distributed in the PBAT phase in the PBS/PBAT/CB and PBAT/CB+PBS mixtures,as predicted theoretically.If CB is first blended with PBS and then with PBAT,it can be found that CB nanoparticles will migrate to the PBAT phase and then located at the interface of the two phases due to their low geometric aspect ratio,thereby significantly enhancing the tensile elongation at break of the composites.In addition,different surface modification techniques and mixing amounts of carbon black nanoparticles will affect the dispersion of carbon black nanoparticles in the composites,and then affect the tensile properties of the composites.PBS/PBAT/CB and PBS/CB+PBAT composite films have resistivities as low as2.54×10~2 and 8.34×10~2Ω·cm,respectively,when the CB content is 10 wt%.On this basis,the rheological properties and spinnability of CB blended with PBS and PBAT were systematically investigated.In view of the excellent mechanical and electrical properties of PBS/CB+PBAT nanocomposites,the optimal spinning process for nanocomposites with CB concentration of 10 wt%was further explored.The preliminary study revealed that:When the spinning temperature is 180℃,the winding speed is 200 rpm,and the secondary drafting ratio is 4 times,the breaking strength and elongation at break of the fibers can reach 2.16 c N/dtex and 90.09%,respectively.Based on the woven fiber,the braiding property and its application in wig were studied.The test reveals that the resistance values of the two fabrics satisfy the requirements for antistatic fabrics,indicating that PPC fiber materials have a certain application potential in the field of antistatic,and it has the potential to be used in artificial wigs.The photothermal conversion performance is validated using a polymer film containing CB.Under an illumination intensity of 1 Kw/m~2,the surface temperature rises with the increase of CB concentration.When the CB concentration reaches 10 wt%,the temperature of the polymer film can reach 69.5℃after 3min of illumination,indicating that the film material has a good application prospect in the field of seawater desalination.In conclusion,the PBS and PBAT degradable polymers were used as the matrix,and the functional fibers and functional membrane materials developed by adding CB exhibited excellent conductivity and photothermal conversion capabilities.The CB treatment process and fiber preparation technology explored had certain reference values for the development of antistatic and photothermal conversion degradable functional fibers and membrane materials.