Surface‐modified mesoporous silica nanorods for the highly aging resistance rubber through controlled release of antioxidant

Exploring the Transformative Potential of Functionalized Mesoporous Silica in Enhancing Antioxidant Activity: A Comprehensive Review

Antioxidants are essential for reducing oxidative stress, protecting cells from damage, and supporting overall well-being. Functionalized mesoporous silica materials have garnered interest due to their flexible uses in diverse domains, such as drug delivery systems. This review aims to thoroughly examine and evaluate the progress made in utilizing functionalized mesoporous silica materials as a possible approach to enhancing antioxidant activity. The authors performed a thorough search of reliable databases, including Scopus, PubMed, Google Scholar, and Clarivate Web of Science, using precise keywords linked to functionalized mesoporous silica nanoparticles and antioxidants. The identified journals serve as the major framework for the main discussion in this study. Functionalized mesoporous silica nanoparticles have been reported to greatly enhance antioxidant activity by allowing for an increased loading capacity, controlled release behavior, the targeting of specific drugs, improved biocompatibility and safety, and enhanced penetration. The results emphasize the significant capacity of functionalized mesoporous silica (FSM) to bring about profound changes in a wide range of applications. FSM materials can be designed as versatile nanocarriers, integrating intrinsic antioxidant capabilities and augmenting the efficacy of current drugs, offering substantial progress in antioxidant therapies and drug delivery systems, as well as enhanced substance properties in the pharmaceutical field. Functionalized mesoporous silica materials are a highly effective method for enhancing antioxidant activity. They provide new opportunities for the advancement of cutting-edge treatments and materials in the field of antioxidant research. The significant potential of FSM materials to change drug delivery methods and improve substance properties highlights their crucial role in future breakthroughs in the pharmaceutical field and antioxidant applications.

Study on Thermal-Oxidative Aging Properties of Ethylene-Propylene-Diene Monomer Composites Filled with Silica and Carbon Nanotubes

In this work, a small amount of carbon nanotubes (CNTs) was used to partially replace the silica in ethylene-propylene-diene monomer (EPDM) to prepare EPDM composites via mechanical blending. The mechanical properties, thermal-oxidative aging properties and thermal stability of the composites were systematically investigated. The results showed that with the increase of CNTs content, the Shore A hardness and stress at 100% strain of the composites increased, while the elongation at break decreased. With the aging time increasing, the aging coefficient and elongation at break of composites decreased while hardness increased due to the raise of crosslinking density. In addition, evidences were found to demonstrate the improved aging resistance by adding CNTs in the EPDM composites, including the less change in Shore A hardness, the smaller change ratio of elongation at break and the lower aging coefficient. When the content of CNTs reached 10 phr, the aging coefficient of the EPDM composite aged for 168 h was nearly twice that of the composite without CNTs, and the thermal stability of the EPDM composite with CNTs was improved as demonstrated by thermal analysis.

Interfacially Super-Assembled Benzimidazole Derivative-Based Mesoporous Silica Nanoprobe for Sensitive Copper (II) Detection and Biosensing in Living Cells

Mesoporous silica nanoparticles (MSNs) functionalized with benzimidazole-derived fluorescent molecules (DHBM) are fabricated via a feasible interfacial superassembly strategy for the highly sensitive and selective detection of Cu²⁺ . DHBM-MSN exhibits an obvious quenching effect on Cu²⁺ in aqueous solutions, and the detection limit can be as low as 7.69×10^-8  M. The DHBM-MSN solid-state sensor has good recyclability, and the silica framework can simultaneously improve the photostability of DHBM. Two mesoporous silica nanoparticles with different morphologies were specially designed to verify that nanocarriers with different morphologies do not affect the specific detectionability. The detection mechanism of the fluorescent probe was systematically elucidated by combining experimental results and density function theory calculations. Moreover, the detection system was successfully applied to detect Cu²⁺ in bovine serum, juice, and live cells. These results indicate that the DHBM-MSN fluorescent sensor holds great potential in practical and biomedical applications.