Carbon Element - Europe PMC

Experimental investigation and finite element modelling of PMMA/carbon nanotube nanobiocomposites for bone cement applications.

Acrylic bone type of cement is one of the most popular candidates for reinforcing polymeric nanobiocomposites, such as multi-walled carbon nanotubes. Bulk samples of the reinforced polymethylmethacrylate matrix were prepared with 0. 1, 0. 25, and 0. 5 wt per wt% of MWCNTs by the casting technique at first. Tensile and bending strengths were determined by tensile and three-point bending experiments, which were used to establish bone cement's key mechanical characteristics, such as tensile and bending strengths. PMMA-MWCNT nanocomposites' tensile and bending parameters were numerically calculated using commercial software. In addition, the FEA and experimental TS, EM, and BS values were less than 20% different than BS results. PMMA had no effect on PMMA testing, and resulted in a negative reaction to contact with mesenchymal stem cells, according to MTT's viability experiments, adding MWCNTs to PMMA had no effect on PMMA toxicity and resulted in no effect on PMMA's stability, resulting in a negative reaction to contact with mesenchymal stem cells.

Source link: https://europepmc.org/article/MED/36043848

Does R&D element flow promote the spatial convergence of regional carbon efficiency?

Due to the carbon neutrality target of several responsible countries, including China, several key countries, including China, rising interest has piqued renewed interest. If discounting the significance of R&D element flow from a dynamic perspective and overlooking the spatial dimensions of carbon efficiency convergence, it may not be conducive to carbon reduction and overall growth. The results show that, firstly, the R&D personnel movement and R&D capital flow showed a steady trend in the neighboring countries, and that the flow pattern is unbalanced. Large geographical variations exist in China regional carbon efficiencies, as well as the carbon reduction between provinces and cities converges. Thirdly, the R&D element flow promotes regional carbon savings convergence.

Source link: https://europepmc.org/article/MED/36044825

Multi-element co-doped biomass porous carbon with uniform cellular pores as a supercapacitor electrode material to realise high value-added utilisation of agricultural waste.

Three-dimensional hierarchical pores and polyatomic doping are among the promising electrode materials in the field of energy storage. The B,N,P-codoped porous carbon network contains uniformly distributed and interwoven macro-, meso-, and micropores. In this research, cornstalk was used as the biomass, and a pioneering strategy was employed to produce porous carbon co-doped with N, B, and P. This paper reveals a multi-element co-doping strategy that improves cornstalk's performance as a precursor to a supercapacitor electrode material and has significant implications on the high-value-added use of waste straw in the high-value-added utilisation of waste straw.

Source link: https://europepmc.org/article/MED/35876119

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