期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 13, 页码 15668-15679出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c01540
关键词
self-healing; flame-retardancy; organic-inorganic hybrid; sustained-release microcapsule; epoxy resin
资金
- National Natural Science Foundation of China [51774198, 51904171, 52004150]
- Outstanding Youth Fund Project of Provincial Universities in Shandong Province, China [ZR2017JL026]
- Qingchuang Science and Technology Project of Universities in Shandong Province, China [2019KJH005]
- Science and Technology Project of Qingdao City [20-3-4-2-nsh]
- Taishan Scholars Project Special Funding in Shandong Province, China
- National Key Research and Development Program of China [2017YFC0805202]
By using phacoemulsification-solvent volatilization, a multifunctional sustained-release microcapsule (SFRM) was successfully synthesized with superior particle size distribution and thermal stability. The study demonstrates that SFRM has satisfactory slow-release and flame-retardancy properties, with a repair rate reaching approximately 61%.
As their service life increases, cement-based materials inevitably undergo microcracking and local damage. In response to this problem, this study used phacoemulsification-solvent volatilization to prepare a multifunctional sustained-release microcapsule (SFRM) with self-healing and flame-retardant characteristics. The synthesis of SFRM is based on the modification of ethyl cellulose with nano-SiO2 particles and cross-linking with a silane coupling agent to form an organic-inorganic hybrid wall material. The epoxy resin is blended with hexaphenoxy cyclotriphosphazene (HPCTP) to form a composite core emulsion. The surface morphology, particle size distribution, core-shell composition, and thermal stability of SFRM were analyzed via scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), Malvern, Fourier-transform infrared (FT-IR), and TD-DSC-DTG. It is concluded that SFRM was successfully synthesized with superior particle size distribution and thermal stability. When the ratio of SiO2 solution and EC alcohol solution reached 1:2, the particle size distribution of the microcapsules was 30-190 mu m, and the D-50 decreased to 70 mu m. The core material content, slow-release performance, and flame retardancy of SFRM were measured using a UV-1800 spectrophotometer and Hartmann tubes, and the compressive and repair properties of SFRM were evaluated by uniaxial compression tests. The results demonstrate that SFRM has satisfactory slow-release and flame-retardancy properties, the LC is 67%, and the first-order kinetic model shows the best fit and conforms to the non-Fickian diffusion mechanism. The SFRM repair rate can reach approximately 61%. This is of substantial significance to the field of self-repairing cement-based materials.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据