Pickering emulsion to the construction of spherical nAl/PVDF complexes with excellent thermal properties
Source abstract
Abstract
Abstract Non-uniform mixing of nano aluminum powder(nAl) with PVDF affects its thermal properties. Spherical nAl/PVDF complexes were prepared using the Pickering emulsion. Tricosafluorododecanoic acid-modified nAl was employed as the surfactant in the emulsion, enhancing the combustion performance by uniformly combining nAl and PVDF without compromising the system's energy. The effects of the concentration of PVDF and nAl, the oil-water ratio, and the static duration on the stability of the emulsion were first investigated. It was found that the emulsion had good stability at a concentration of 5 wt%~20 wt%, with an oil-water ratio of 1:4 ~ 1:7, with a static duration of less than 60 minutes. The emulsion was extracted and dried to obtain spherical nAl/PVDF complexes. These complexes were then characterized for their morphology, size, thermal decomposition, and combustion properties. The results showed that the complexes were regular spheres with particle sizes of 20–50 µm. They were uniformly complexed on the nano-scale, resulting in enhanced reaction and combustion rates compared to the physical mixture. The exothermic amount was increased by a range of 24.4–49.6%, leading to more efficient and stable combustion. The Pickering emulsion presents a new approach for the preparation of nano-fluorinated aluminum thermite.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Pickering emulsions and particle stabilization · Micro and Nano Robotics · Advanced Materials and Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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