Journal of Materials Research and Technology-JMR&T
·
2024
·
IF 6.2
Yu-Wei Liu,Zhi-Sheng Nong,Tian-Nan Man,Shao-Wei Lu,Li-Hui Dong
To improve the thermal barrier properties of epoxy resin coatings, a composite waterborne aerogel multifunctional coating that possesses both mechanical properties and controllable barrier ability was prepared in this study. This coating incorporates granular silica aerogel, organic montmorillonite, and two flame retardants: aluminum hydroxide (ATH) and magnesium hydroxide (MH). The results showed that montmorillonite, modified with stearyl trimethyl ammonium bromide (STAB), exhibited antisymmetric and symmetric stretching vibrational infrared spectral absorption peaks of –CH 3, –CH 2 , characteristic of the long-chain alkane quaternary ammonium salt. This indicated that the quaternary ammonium salt was intercalated into the montmorillonite interlayer, enhancing the surface lamellae. The coating effectively absorbed energy when stressed, resulting in a strength increase of 146.3%. Incorporating high porosity silica aerogel significantly improved the barrier behavior of the composite coating, enabling controlled thermal insulation and excellent corrosion resistance. The coating reduced heat transfer paths and effectively impeded heat transfer, maintaining a high corrosion inhibition efficiency (99.9%) in a 3.5% NaCl solution. Additionally, the individual actions of the two flame retardants led to highly effective flame retardant properties, with the total heat release rate (THR) reduced by about 43.5% and the total smoke production (TSP) by 40.1%.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Li Li,Xinhong Chen,Xia Xiong,Xiaoping Wu,Zinan Xie,Zuohua Liu
The development of a simple and environmentally friendly method to synthesize hollow TiO 2 structures is urgent for realizing high NIR reflectance and low thermal conductivity . Hollow TiO 2 @SiO 2 structures have been successfully synthesized by a recycling template method. The synthesis process involves four steps as follows: 1) preparation of SiO 2 spheres, 2) synthesis of SiO 2 @TiO 2 core-shell structure by coating mesoporous TiO 2 shell on SiO 2 and crystallization by calcination , 3) etching the SiO 2 @TiO 2 to form the hollow TiO 2 spheres, and 4) coating the hollow TiO 2 spheres with a SiO 2 protection layer to produce hollow TiO 2 @SiO 2 structures. The SiO 2 serves as a template to support and synthesize hollow TiO 2 shell, and then after being etched, to form a Na 2 SiO 3 solution as a coating agent to protect TiO 2 shell from photocatalytic activity. The as-synthesized hollow TiO 2 @SiO 2 structures not only have high NIR reflectance, but also have a high thermal barrier performance due to the hollow structure. Moreover, the NIR reflectance of the coating made from hollow TiO 2 @SiO 2 reached 94.9%, and the temperature of the inner surface of the coating board is reduced about 16 °C, compared with the surface without coating. The weather resistance studies reveal that the hollow TiO 2 @SiO 2 sample is very stable under the UV irradiation. In particular, the hollow TiO 2 @SiO 2 structures synthesized by using this method shows multifunctional responses towards solar heat.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2025
·
IF 4.9
Guanlin Zhou,Chao Wang,Heng Li,Nenad Filipovic,Chengwei Wu,Wei Zhang
Magnetic hyperthermia (MH) relies on the heat generated by magnetic nanoparticles (MNPs) under an alternating magnetic field to kill tumor cells. However, the thermal barrier of the cell membrane hinders the transfer of heat generated by MNPs into cells, thereby limiting their therapeutic efficacy. Enhancing MNPs endocytosis is a promising way to overcome this limitation. The modification of physicochemical properties of MNPs and the pretreatment with electrical field can enhance the endocytosis. As an alternative, here, the effect of alternating magnetic field (AMF) pretreatment was explored. The AMF stimulation increases nanoparticle uptake by 1.62-fold and improves magnetic hyperthermia efficacy by 33 %. AMF stimulation induces F-actin depolymerization, leading to a reduction in cellular elastic modulus. This decreases the elastic deformation energy required for endocytosis, thereby facilitating the formation of membrane ruffles essential for macropinocytosis.
研究领域:
生物医学工程
·
纳米医学
·
癌症治疗
·
细胞生物学
·
生物物理学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Fei Zhong,Xubin Yang,Chunlin Chen,Mingwu Wang,Bin Wang,Hong Xia,Jiaming Song
The abundant C, P, and N elements in the structure of adenosine triphosphate (ATP) can act as carbon, acid, and gas sources, and thus can be used as an efficient intumescent flame retardant. Here, a layer of polydopamine (PDA) with polyhydroxyl groups was firstly loaded on the surface of BN to provide a bridging effect for the surface modification of BN. Then, ATP-Cu was immobilized on the BN surface by complexation of ATP with Cu 2+ , resulting in an efficient inorganic-organic-metal composite flame retardant (BNP@ATP-Cu). This composite flame retardant effectively combined the high barrier effect of BN, the high swelling property of ATP and the catalytic carbon formation activity of Cu 2+ . The experimental results revealed that the EP loaded with BNP@ATP-Cu showed the lowest backside temperature (171.2 °C), indicating the highest thermal barrier effect. Moreover, BNP@ATP-Cu/EP exhibited the most significant swelling characteristics (22.7 mm, 17.46) and smoke suppression effect (42.8 %). In contrast, the carbon residue of BNP@ATP-Cu/EP (30.8 %) was significantly higher than that of the other coated samples, which was related to the combined effect of BN and ATP-Cu. The above relevant results fully demonstrated the effectiveness of the composite flame retardants in improving the fire resistance of epoxy coatings.
研究领域:
材料科学
·
化学工程
·
消防安全科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）