Mrs Bulletin最新文献

Abstract

This study examined producing three-dimensional printed CS scaffolds coated with rifampicin (RIF)-loaded poly(lactic acid) (PLA) microparticles to treat hidradenitis suppurativa lesions. The morphology of the particle-coated scaffolds was examined; it was observed that the particles obtained were monodisperse and of an ideal size for the intended application. According to the drug-release results, the release of drugs was completed in 24 h from the CS/PLA-2RIF scaffold and in 48 h from the CS/PLA-3RIF scaffold. Antimicrobial analysis was performed using Escherichia coli and Staphylococcus aureus; the scaffolds showed effectiveness against these bacterial strains. Per MTT analysis, the scaffolds had no toxic effects; it was noted that the cells easily adapted to the scaffold. The results from the encapsulated rifampicin-loaded PLA-coated CS scaffolds indicate that these scaffolds are a promising alternative method for treating hidradenitis suppurativa.

Impact statement

This study evaluated the creation of three-dimensional (3D) printed CS scaffolds that were coated with rifampicin (RIF)-loaded poly(lactic acid) (PLA) microparticles; the goal of this approach involves the treatment of the lesions associated with hidradenitis suppurativa (HS). The drug-release results indicate that the release of the drugs was completed in 24 h from the CS/PLA-2RIF scaffold and in 48 h from the CS/PLA-3RIF scaffold. Antimicrobial analysis was conducted using Escherichia coli and Staphylococcus aureus; the scaffolds showed effectiveness against these bacterial strains. Larger zones were demonstrated in testing the scaffolds with gram-positive bacteria; smaller zones were demonstrated in testing the scaffolds with gram-negative bacteria. The PLS/CS scaffold was associated with a small inhibition zone; this finding was attributed to the natural antimicrobial effect of CS. The MTT results suggest that scaffolds were not associated with toxic effects. The results of this study suggest that the wound dressing obtained by combining 3D printing and EHDA methods could provide an alternative approach to treat HS.

Graphical abstract

Abstract

Addressing the growing demand for conductive and flexible composites, this research focuses on producing thermoplastic composite fibers made of polyurethane and carbon nanomaterials featuring the highest possible electrical conductivity. Based on a recently developed methodology enabling the formation of very high filler contents of 40% w/w, this work presents a systematic investigation of the role of all the materials used during the manufacturing process and selects the materials that ensure the best electrical performance. The results show that the highest electrical conductivity and current-carrying capacities are obtained when dimethylformamide is used as a solvent, and small amounts of AKM surfactant aid the de-agglomeration of carbon nanomaterials. It is also shown that the hybridization of MWCNTs filler with graphene nanoplatelets and small amounts of carbon black is beneficial for the electrical properties. However, the highest performance is achieved with SWCNTs as fillers, exhibiting two orders of magnitude higher electrical conductivities of 6.17 × 10⁴ S/m.

Impact statement

The article presents a pioneering exploration into the synthesis and application of a novel composite material. This research significantly impacts the field of electromaterials by introducing a cutting-edge approach that leverages the synergistic properties of carbon nanotubes, graphene, and carbon black within a single filament. The impact of this research extends beyond the laboratory, influencing the development of next-generation materials that bridge the gap between conventional materials and advanced nanomaterials. The presented composite filaments open avenues for the creation of innovative devices and systems that demand good mechanical strength, electrical conductivity, and thermal stability. Moreover, the versatility of these filaments allows for the optimization of materials properties, enabling customization based on specific application requirements. In addition to its technological significance, the paper contributes to sustainability efforts by facilitating the production of lightweight, energy-efficient materials. The insights provided by this research have the potential to reshape the landscape of materials science, inspiring further exploration and innovation in the quest for versatile and high-performance electromaterials.

Graphical abstract

Global demand for batteries is increasing at a rapid pace, precipitating the equally rapid generation of hazardous battery waste. Recycling, which holds high potential for both mitigating this waste and recovering raw materials for subsequent battery manufacture, is often recognized as a necessary component of the battery life cycle. A critical step in many battery recycling schemes is the use of solvent to recover valuable metals such as lithium, cobalt, manganese, nickel, and others. This recovery typically involves the use of harsh mineral acids and peroxides, which pose their own environmental and safety hazards. The use of more benign organic acids and other organic compounds has emerged as a promising means to mitigate the hazards posed by purely inorganic solvents. In this article, we review recent research on organics-based metal recovery for battery recycling and provide our perspective on the extant challenges and opportunities in the field.

Graphical abstract