Incorporation of fibroin from Bombyx mori and nanotubes in polyamide 6 systems
Silk fibroin is a natural biopolymer from Bombyx mori (silkworm) that has excellent thermal stability and mechanical strength. Amounts of this biopolymer is rejected in the industrial process due to the choice of viable cocoons for the production of superior quality silk. This research aimed to reuse the natural biopolymer from B. mori to produce systems, melt processes, polyamide 6 mixtures with carbon nanotube (MWNT) functionalized with carboxyl and fibroin. The polymeric film was obtained by casting using formic acid as the solvent. The results show an increase in the mechanical stability of the films with the presence of fibroin and MWNT in the nylon 6 composites, having reached a modulus of elasticity of 4.0 GPa with 0.025% of nanotube in the composite. Thus, the incorporation of fibroin, extracted from cocoons considered defective, in composite with polyamide 6 and carbon nanotube functionalized with carboxyl, which the aim was improve the mechanical stability in these systems.
ASTM, D882-02. Standard Test Method for Tensile Properties of Thin Plastic Sheeting.
Baek, Y.; Joong, H.; Kim, S.; Lee, J.; Yoon, J. 2017. Evaluation of carbon nanotube-polyamide thin-film nanocomposite reverse osmosis membrane: Surface properties , performance characteristics and fouling behavior. Journal of Industrial and Engineering Chemistry, 56: 327–334.
Chen, X.; Knight, D. P.; Shao, Z.; Vollrath, F. 2001. Regenerated Bombyx silk solutions studied with rheometry and FTIR. Polymer, 42: 9969–9974.
Guo, Y.; Mi, Y.; Zhao, F.; Ji, Y.; An, Q.; Gao, C. 2018. Separation and Purification Technology Zwitterions functionalized multi-walled carbon nanotubes/polyamide hybrid nanofiltration membranes for monovalent/divalent salts separation. Separation and Purification Technology, 206: 59–68.
Koh, L.; Cheng, Y.; Teng, C.; Khin, Y.; Loh, X.; Tee, S.; Han, M. 2015. Progress in Polymer Science Structures , mechanical properties and applications of silk fibroin materials. Progress in Polymer Science, 46: 86–110.
Lopes, T.; Carvalho, A.; Gurgel, M.; Vieira, A.; Luis, M.; Gurgel, M. 2016. Biosorption study of copper and zinc by particles produced from silk sericine alginate blend : evaluation of blend proportion and thermal cross-linking process in particles production. Journal of Cleaner Production, 137, 1470–1478.
Lv, F.; Yao, D.; Wang, Y.; Wang, C.; Zhu, P. 2015. Recycling of waste nylon 6/spandex blended fabrics by melt processing. Composites Part B, 77: 232–237.
Moraes, T.; Maria, T.; Costa, H.; Oliveira, A. De, Hickmann, S. 2016. Valorization of food-grade industrial waste in the obtaining active biodegradable films for packaging. Industrial Crops & Products, 87: 218-228.
Oliveira, R. A.; Santos, J. A.; Boroviecz, S. 2017. Análise do custo de produção e do processo produtivo da sericicultura : um estudo de caso no Paraná. Paraná, Redes - Revista do Desenvolvimento Regional, 22(1): 528-555.
Takeuchi, K.; Takizawa, Y.; Kitazawa, H.; Fujii, M.; Hosaka, K. 2018. Salt rejection behavior of carbon nanotube-polyamide nanocomposite reverse osmosis membranes in several salt solutions. Desalination, 443: 165–171.
Valentini, L.; Bittolo, S.; Mussolin, L.; Pugno, N. M. 2018. Silkworm silk fibers vs PEEK reinforced rubber luminescent strain gauge and stretchable composites. Composites Science and Technology, 156: 254-261.