Mesoporous silica nanoparticles: A versatile platform for encapsulation and delivery of essential oils for food applications

Advances in Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 325, P. 103116 - 103116

Published: Feb. 28, 2024

Language: Английский

---

Mechanically Robust and Thermal Insulating Silica/Aramid Nanofiber Composite Aerogel Fibers with Dual Networks for Fire‐Resistant and Flexible Triboelectric Nanogenerators

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 22, 2024

Abstract Aerogel fibers, known for their lightweight and exceptional thermal insulation properties, provide an ideal material solution fabricating triboelectric nanogenerators (TENGs) self‐powered wearable electronics in extreme environments, such as firefighting gear. However, current aerogel fibers face limitations due to poor mechanical properties lack of performance stability under harsh conditions. Herein, a facile strategy preparing silica/aramid nanofiber (ANF) composite with interpenetrated dual networks silica‐dominant component (≈64 wt.%) is demonstrated; the unique structure composition endow high tensile strength (3.4 MPa), low conductivity (0.033 W (m·K) −1 ), large specific surface area (587 m 2 g outstanding fire resistance at 95% porosity, combining best both ANF silica aerogel. Moreover, exhibit excellent flexibility extremely temperatures (−196 °C) maintain structural integrity even when exposed flame up 5 min. Leveraging these fiber‐based TENGs show electrical output before after combustion (>94% retention). The fabrication offers promising opportunities modulating functionalities on demand, holding great potential future applications smart protective fabrics environments.

Language: Английский

---

Enhancing foam stability and addressing asphaltene deposition for improved oil recovery in CCUS applications using aerogel nanoparticles

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 481, P. 148290 - 148290

Published: Dec. 25, 2023

Language: Английский

---

Safety and efficacy assessment of aerogels for biomedical applications

Biomedicine & Pharmacotherapy, Journal Year: 2021, Volume and Issue: 144, P. 112356 - 112356

Published: Oct. 26, 2021

The unique physicochemical properties of aerogels have made them an attractive class materials for biomedical applications such as drug delivery, regenerative medicine, and wound healing. Their low density, high porosity, ability to regulate the pore structure makes ideal nano/micro-structures loading drugs active biomolecules. As a result this, number in vitro vivo studies on therapeutic efficacy these porous has increased substantially recent years continues be area great interest. However, data about their performance safety is limited. Studies shown that polymer-based, silica-based some hybrid are generally regarded safe but given acute, subacute, chronic toxicity majority aerogel types missing, more work still needed. This review presents comprehensive summary different proposed date well new innovative other areas decontamination. We also reviewed biological effect cells living organisms with focus overall (in vitro).

Language: Английский

---

Production and Optimization of Bio-Based Silica Nanoparticle from Teff Straw (Eragrostis tef) Using RSM-Based Modeling, Characterization Aspects, and Adsorption Efficacy of Methyl Orange Dye

Journal of Chemistry, Journal Year: 2022, Volume and Issue: 2022, P. 1 - 15

Published: Jan. 6, 2022

The brown teff straw was utilized in this study to produce silica using the sol-gel technique. After pretreatment, raw material of characterized. data were analyzed central composite design and response surface technique, four independent parameters, namely, temperature, NaOH concentration, rotational speed, extraction time, evaluated for process optimization. Before extracting with an alkaline solution, content ash determined AAS spectrometer. is around 92.89%. treated solution concentrations range 1 M 3 (0.5 interval). time varied at intervals 55, 70, 85, 100, 115 minutes. Temperatures changed magnetic stirrer equipment 80°C 100°C (5°C At 350 rpm, 400 450 500 550 rotating speed adjusted. best conditions amorphous 1.50 NaOH, 109.99 min, 94.98°C, a 499.57 maximum yield 85.85%. XRD FTIR analyses used assess physicochemical characteristics extracted silica. aqueous solutions methyl orange test adsorption efficiency percent removal 90.48%.

Language: Английский

---

Aerogel-Based Materials in Bone and Cartilage Tissue Engineering—A Review with Future Implications

Gels, Journal Year: 2023, Volume and Issue: 9(9), P. 746 - 746

Published: Sept. 13, 2023

Aerogels are fascinating solid materials known for their highly porous nanostructure and exceptional physical, chemical, mechanical properties. They show great promise in various technological biomedical applications, including tissue engineering, bone cartilage substitution. To evaluate the bioactivity of substitutes, researchers typically conduct vitro tests using simulated body fluids specific cell lines, while vivo testing involves study different animal species. In this context, our primary focus is to investigate applications types aerogels, considering materials, microstructure, porosity field engineering. From clinically approved experimental we present a comprehensive list summary aerogel building blocks biological activities. Additionally, explore how complexity scaffolds influences performance, ranging from simple single-component or hybrid aerogels more intricate organized structures. We also discuss commonly used formulation drying methods chemistry, molding, freeze casting, supercritical foaming, drying, subcritical, techniques. These techniques play crucial role shaping applications. Alongside progress made, acknowledge challenges ahead assess near far future aerogel-based hard engineering as well potential connection with emerging healing

Language: Английский

---

Review on carbon dots: Synthesis and application in biology field

BMEMat, Journal Year: 2023, Volume and Issue: 1(4)

Published: Sept. 8, 2023

Abstract As a multifunctional fluorescent nanomaterial, carbon dots (CDs) not only have small size, stable chemical properties, excellent photoluminescence characteristics, but also exhibit good biocompatibility and low toxicity. It has attracted considerable attention in the field of nanotechnology biological science. CDs contain abundant functional groups on surface, which retain part properties raw materials, may new photoelectric, catalytic, biomedical, other functions. In this review, we systematically summarize synthesis methods, modifications, optical main functions recent years. The application functionalized modified detection, imaging, photodynamic therapy, photothermal targeted drug delivery, gene protein biomedical fields is introduced. latest progress with its own function antioxidant, anti‐pathogen, disease treatment summarized. Finally, discuss some problems practical look forward to future development trend self‐functional combined surface modification achieve multimodal diseases.

Language: Английский

---

Chitosan–Silica Composite Aerogel for the Adsorption of Cupric Ions

Gels, Journal Year: 2024, Volume and Issue: 10(3), P. 192 - 192

Published: March 11, 2024

A chitosan–silica hybrid aerogel was synthesized and presented as a potential adsorbent for the purification of cupric ion-contaminated media. The combination organic polymer (chitosan), which can be obtained from fishery wastes, with silica produced mostly macroporous material an average pore diameter 33 µm. extremely light (56 kg m−3), porous (96% porosity, 17 cm3 g−1 volume), Brunauer–Emmett–Teller surface area (SBET) 2.05 m2 g−1. effects solution pH, Cu(II) concentration, contact time, counterion on removal were studied. Results showed that initial pH cation-containing aqueous had very little influence performance this aerogel. According to Langmuir isotherm, remove maximum amount ca. 40 mg ions per gram kinetic data reaction rate-limiting step equilibrium quickly reached (in less than one hour). Thus, approach developed in study enabled recovery waste preparation novel material, efficiently reused new application, namely water remediation.

Language: Английский

---

Thermal Conductivity of Nanoporous Materials: Where Is the Limit?

Polymers, Journal Year: 2022, Volume and Issue: 14(13), P. 2556 - 2556

Published: June 23, 2022

Nowadays, our society is facing problems related to energy availability. Owing the savings that insulators provide, search for effective insulating materials a focus of interest. Since current do not meet increasingly strict requirements, developing with greater capacity needed. Until now, several nanoporous have been considered as superinsulators achieving thermal conductivities below air 26 mW/(m K), like nanocellular PMMA/TPU, silica aerogels, and polyurethane aerogels reaching 24.8, 10, 12 respectively. In minimum conductivity, still undiscovered, first step understanding heat transfer in materials. The main features leading superinsulation are low density, nanopores, solid interruptions hindering phonon transfer. second crucial condition obtaining reliable conductivity measurement techniques. This review summarizes these techniques, data literature regarding structure two materials, polymers aerogels. key conclusion this analysis specifies only steady-state methods provide value superinsulators. Finally, theoretical discussion performed providing detailed background further explore lower limit develop more efficient

Language: Английский

---

Biomedical applications of silica-based aerogels: a comprehensive review

Macromolecular Research, Journal Year: 2023, Volume and Issue: 31(6), P. 519 - 538

Published: March 2, 2023

Silica-based aerogels are the appropriate and well-known porous materials that have become interesting in science technology, especially biomedical community. prepared from silica gels where liquid is drawn out of network structure so its three-dimensional not disturbed. From a nanotechnologist's perspective, will special place nanotechnology because they low density, large surface area nanometer pores, size their pores can be adjusted different ways. In addition to prominent features, these very attractive despite possibility changing chemical composition according desired applications. Recent advances silica-based as had great impact on extensive application various fields mostly high-tech engineering, usages, including environmental control, tissue cancer diagnosis, therapy, biomarking, drug delivery. Many vital key issues field (nano) material applications, usages biomedicine, should investigated before clinical Some important include toxicity, bioactivity, compatibility, on. Minimal toxicity maximum biodegradability two future challenging related interaction biological systems. So, it essential know how design synthesize nanoscale structures for medical Engaging with whose characteristics customized field. this review, we intend provide up-to-date information applications biomedicine. Hence, review summarizes discusses potential induced by them. The present study focuses basic concepts recent Biomedical

Language: Английский

---