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Super elastic fireproof aerogel with hierarchical structure, prepared by double template assisted microbubble engineering

Super elastic aerogel has significant advantages in advanced thermal management system of energy-saving buildings due to its ultra-low thermal conductivity. However, inorganic aerogels have the problems of brittleness and poor processability, while organic aerogels face the challenges of high manufacturing costs and insufficient elastic recovery. In this study, a dual template (ice and bubble) strategy was used to prepare an ultra light, super elastic aerogel inspired by the stress dissipation dome structure, which has a hierarchical pore structure. By improving the Tessari method, engineering microbubbles to form macroscopic pores (≈ 100 µ m) was achieved, while the ice template introduced aligned pores with a size of several micrometers during the freeze-drying process. The synergy between rigid collagen (Ge) skeleton, flexible polyvinyl alcohol (PVA) node and potassium salt enhanced crystal domain endows the aerogel with excellent elasticity, ultra-low density and thermal conductivity. The flame retardant performance is achieved through potassium salt mediated catalytic carbonization, reducing the peak heat release rate by 54% and endowing it with self extinguishing behavior. The introduction of microbubbles in the precursor can provide macro pores for the aerogel. These pores disperse the internal stress during the deformation of the aerogel, and the dynamic hydrogen bond endows it with rapid water assisted self-healing ability and closed-loop recoverability. The use of commercial compressed air foaming systems for scalable production with low raw material costs further highlights its industrial feasibility. Combined with biodegradability and excellent thermal insulation performance, this study has opened up a new direction of sustainable, fire safe aerogels for multifunctional applications. Aerogels have shown a wide range of applications in sensing, thermal insulation and flame retardants due to their unique characteristics such as low density, high porosity and excellent thermal insulation. Although classical inorganic silica aerogels have been commercialized on a large scale, their practical applications are fundamentally limited by the inherent brittleness of silica networks. In addition, the precursors used to produce silica aerogels are derived from petroleum, which raises environmental concerns about sustainability. Organic polymer aerogels, including polyimide and syndiotactic polystyrene aerogels, have become candidate materials for thermal insulation textiles. However, these materials are plagued by dependence on non renewable resources and high manufacturing costs. In contrast, renewable biomass derived gel based on nano cellulose and protein have been developed for thermal management applications. Nevertheless, the industrial application of nano cellulose aerogels still faces two challenges: i) the energy intensive extraction process involving chemical treatment (such as TEMPO mediated oxidation) has led to a significant increase in raw material costs (30-100 US dollars/kg 11); Ii) Due to irreversible hydrogen bonding between adjacent cellulose nanofibers under compressive stress, most nanocellulose structures exhibit insufficient elastic recovery (permanent collapse after cyclic compression deformation exceeding 30%). This kind of mechanical defect is especially harmful in the application of aerogels, because the lack of resilience will lead to the flattening of the structure under load, and eventually lead to the collapse of pores, which will lead to the decline of thermal insulation performance.

Nano Micro Letters Multifunctional Asymmetrical Double layer Aero gel! Efficient electromagnetic interference shielding and ultra-high frequency electromagnetic wave absorption

Currently, electromagnetic radiation and pollution are becoming increasingly severe, and electronic devices are severely affected by electromagnetic interference (EMI), which is easily detected by multispectral detection technology. Traditional EMI shielding materials suffer from high reflection caused by impedance mismatch, and have a single function, making it difficult to meet the requirements of complex scenarios. MXene based aerogel has excellent conductivity and porous structure, but its single function limits its application. Therefore, it is urgent to design multifunctional materials that combine efficient electromagnetic wave absorption, broadband shielding, and multi scenario applicability. Through breakthroughs in structural design and preparation technology, the problems of reflection pollution and functional limitations of existing materials can be solved. Based on this, this paper prepared lotion ink through electrostatic assembly of MXene/GO and octadecylamine (ODA), combined with 3D printing/molding to build an asymmetric double-layer aerogel: the top layer MG (MXene/GO) optimized impedance matching, and the bottom layer MXene enhanced reflection. This structure utilizes the absorption reflection reabsorption mechanism and interference cancellation effect to achieve an ultra-high absorption coefficient of 0.95 and a shielding effectiveness of>100 dB in the X-band, while maintaining an absorption rate of>0.9 in the 8.2-40 GHz ultra wideband. Aerogel has hydrophobic, thermal insulation, joule heating, solar thermal conversion and oil spill cleaning capabilities, providing innovative solutions for multi scene electromagnetic protection.

2025-06-24

Miraculous "air" - aerogel

Once a scientist accidentally discovered a material similar to "air", which has almost no weight but is exceptionally strong, like an incredible "magical material". In 1931, American scientist Samuel Stephens Kistler prepared this new material, named "aerogel", aerogel. "Aero"+"gel" describe the characteristics of this new material, that is, a gel filled with gas. Next, let's take a look at this magical 'magic material'.

2025-06-23

What are the application advantages of aerogel thermal insulation materials?

In the field of petrochemicals, the part of the steam transmission system with a higher heat loss rate is the steam transmission pipeline, and the heat loss generated can account for about 25% of the total heat loss. Improving the insulation effect of the steam transmission system pipeline is an important way to reduce the overall heat loss of the system. As one of the new thermal insulation materials, aerogel thermal insulation material has good thermal insulation performance, strong compression resistance, long service life and other advantages. Therefore, we can try to use aerogel insulation materials to transform the pipeline of the steam transmission system, so as to enhance the insulation performance of the pipeline and reduce the energy loss caused by heat loss. In this paper, the case analysis method is used to discuss the thermal insulation effect of aerogel used for steam transmission pipeline in an oil field. Elaborate on testing methods, evaluation indicators, and measurement point layout, carry out insulation material selection and structural optimization design, and calculate the thickness of different insulation structures. The results show that the thermal insulation performance of aerogel composite thermal insulation structure is significantly better than that of composite silicate felt structure, double composite silicate tile and composite silicate felt combined thermal insulation structure, which confirms the application advantages of this material in steam transmission system.

2025-06-21

Application of Precipitation Method White Carbon Black in Rubber Foam Materials

As an important inorganic filler, precipitated white carbon black has unique application value in rubber foam materials. Its structural characteristics (such as high specific surface area and surface hydroxyl distribution) and physicochemical properties make it play a key role in improving the mechanical properties, cell structure, and functionality of foam materials. The following analysis focuses on application principles, performance impact/practical application points, and optimal addition amount, hoping to inspire and help you:

2025-06-09

Application of Nano Silicon Dioxide in Plant Disease and Pest Control

In modern agriculture, pesticides are an important means of reducing plant diseases and pests and improving agricultural production efficiency. However, currently most chemically synthesized pesticides suffer from issues such as biological toxicity, drug resistance, and environmental hazards, and the effective utilization rate of traditional pesticide formulations is relatively low. In order to solve these problems, it is urgent to introduce new and efficient plant disease and pest control technologies to reduce the abuse of chemical pesticides and promote sustainable agricultural development. In recent years, the development of nanomaterials and related technologies has opened up new avenues for plant disease and pest control. Their unique surface properties and small size effects, as well as novel physical and chemical properties, help overcome many inherent limitations of existing pesticide products. Among various types of nanomaterials, nano silica has attracted widespread attention due to its large specific surface area, good stability, easy surface modification, and good biocompatibility. This article summarizes the synthesis methods of nano silica and its application in plant disease and pest control, based on recent research progress at home and abroad. It also looks forward to the challenges it faces and future development prospects, aiming to provide theoretical basis for the application of nano silica in plant disease and pest control.

2025-05-26

Silicon dioxide: the "universal pharmaceutical excipient" for pharmaceutical preparations

Medicine has been closely related to people's lives since ancient times. The production of drugs began with traditional medicine and later evolved to separate and extract natural medicines from natural substances, gradually developing and establishing an industrial production system for chemical drugs. Medicinal excipients play a crucial role in the pharmaceutical industry. Medicinal excipients refer to the excipients and additives used in the production and formulation of drugs. In addition to shaping, acting as carriers, and improving stability, they also have important functions such as solubilization, solubilization assistance, and sustained and controlled release. They are important components that may affect the quality, safety, and effectiveness of drugs. Silicon dioxide, as a widely used inorganic material, is also a very useful pharmaceutical excipient in the pharmaceutical field. The structural formula of auxiliary silica is mSiO2 · nH2O, which is a white powder with good fluidity, high purity, and no pollution. It has the characteristics of small particle size, large specific surface area, and many pores. At the same time, the silicon hydroxyl groups distributed on the surface make it have good adsorption performance. Adding medicinal excipient silica can effectively improve the quality and performance of drug formulations, especially tablets, greatly enhancing the market competitiveness of drugs. Its application in drug formulations has received increasing attention.

2025-05-20

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