Search

Natural fiber composites have become a hot research topic all over the world, and have received strong support from governments. This paper first reviews the overall trend and development history of natural fiber composites, and analyzes their global market. Then the research highlights and situation of natural fiber composites are pointed out. Finally, the main industrial application fields of natural fiber composites are also summarized. In the future, High-performance and high value-added natural fiber composites are the important directions of global industrialization market. And it is necessary to further refine the key technologies behind the industrialization, and promote the green, intelligent and high-performance manufacturing of such composites, so as to play a positive role in national environmental protection and social sustainable development. [ABSTRACT FROM AUTHOR]

In this paper, the effects of hyperbranched polyamide on the properties of sisal fiber reinforced polypropylene composites were studied. And the microstructure, fluidity, mechanical properties, and thermal stability of the composites were characterized. The results show that hyperbranched polyamide can significantly improve the interfacial bonding between fiber and matrix. When the fiber content is 20%, the melt flow rate can increase by 54%. Meanwhile, the tensile property of the composite increases by 50%, the impact strength of silane-treated fiber composite increases by 24%. However, the thermal stability of the composite decreases slightly after the addition of hyperbranched polyamide. [ABSTRACT FROM AUTHOR]

In this paper, sisal fibers were modified by different methods such as alkali treatment, γ-aminopropyltriethoxysilane treatment, tetraethylorthosilicate (TEOS) sol-gel treatment, TEOS, and silane combination treatment. The effects of different modification methods on the properties of sisal fibers were studied by thermogravimetric analysis (TGA), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and universal material testing machine. The results show that the combination treatment fiber has the best heat resistance and the most obvious improvement in tensile properties, the tensile strength and modulus increase by 31.58% and 15.82%, respectively. [ABSTRACT FROM AUTHOR]

In order to improve the mechanical properties of sisal fiber-reinforced polypropylene composites, the sisal fibers were grafted with poly(amidoamine) dendrimer and the effects of grafting generations on the mechanical properties of composites were studied. The results reveal that the tensile, flexural, and impact strength of the composites are improved considerably with the poly(amidoamine) dendrimer grafting treatment. For the 2.0 generation treatment with the poly(amidoamine) dendrimer, the tensile, flexural, and impact strength of the composites at 30 wt% fiber loading increase by 29%, 13%, and 54%, respectively. However, the thermal and mechanical properties of the sisal fibers decrease after prolonged grafting treatment. [ABSTRACT FROM AUTHOR]

Biodegradable polymer is playing an increasingly significant role in the development of biomedical materials due to its good biocompatibility and biodegradability, and is undoubtedly the focus in the biomedical fields, such as controlled drug delivery, tissue engineering, and regenerative medicine. In this review, some new degradable biomedical copolymers reported over the past 5 years are introduced and discussed in combination with some our research results. The molecular design, chemical structures and related properties of these novel biodegradable copolymers are reported. In summarizing the review, the development, potential applications and future directions of the degradable biomedical copolymers are discussed. [ABSTRACT FROM AUTHOR]