Flammability Performance of Ceramifiable Polydimethylsiloxane (PDMS) Composites With Needle-Like Wollastonite
Zhikun Jiang
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Search for more papers by this authorZijian Chen
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Search for more papers by this authorYingying An
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Search for more papers by this authorSiqi Wang
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Search for more papers by this authorTing Li
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Search for more papers by this authorWei Yang
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Search for more papers by this authorCorresponding Author
Hongdian Lu
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Correspondence:
Hongdian Lu ([email protected])
Chunxiang Wei ([email protected])
Search for more papers by this authorCorresponding Author
Chunxiang Wei
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Correspondence:
Hongdian Lu ([email protected])
Chunxiang Wei ([email protected])
Search for more papers by this authorZhikun Jiang
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Search for more papers by this authorZijian Chen
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Search for more papers by this authorYingying An
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Search for more papers by this authorSiqi Wang
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Search for more papers by this authorTing Li
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Search for more papers by this authorWei Yang
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Search for more papers by this authorCorresponding Author
Hongdian Lu
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Correspondence:
Hongdian Lu ([email protected])
Chunxiang Wei ([email protected])
Search for more papers by this authorCorresponding Author
Chunxiang Wei
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, Anhui, People's Republic of China
Correspondence:
Hongdian Lu ([email protected])
Chunxiang Wei ([email protected])
Search for more papers by this authorFunding: This work was supported by National Natural Science Foundation of China, 22302052. Natural Science Foundation for Colleges and Universities in Anhui Province, 2022AH040251, 2023AH052190. Excellent Scientific Research and Innovation Team in University of Anhui Province, 2022AH010096.
ABSTRACT
Ceramifiable flame retardant polydimethylsiloxane (PDMS) composites were successfully fabricated using solution blending and hot pressing, incorporating needle-like wollastonite (WT), zinc borate (ZB), aluminum hydroxide (ATH), and glass powder (GP) as fillers. The thermal, mechanical, and flame retardant properties, along with the ceramization behavior of the composites, were thoroughly characterized. The findings demonstrate that WT is more effective than conventional lamellar mica in enhancing both tensile strength and flame retardancy, as well as promoting ceramization. The optimized PDMS/WT/ZB/ATH/GP system passed the UL-94V-0 rating and exhibited an increased limiting oxygen index (LOI) of 28.5%. Cone calorimetry results indicated that WT effectively reduced the peak heat release rate and delayed ignition of the composites. The flame retardant mechanism is mainly attributed to the WT with a high aspect ratio, which serves as a sintering aid, accelerates the eutectic reaction, and promotes the formation of a ceramic barrier at lower temperatures by reducing the resistance to liquid-phase migration.
Open Research
Data Availability Statement
The data that support the findings of this study are available from the corresponding author upon reasonable request.
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