Mechanical, Thermal and Acoustic Properties of Open-pore Phenolic Multi-structured Cryogel

2017 2nd International Conference on Advanced Materials Research and Manufacturing Technologies

材料科学;机械制造

Yao, Rui^1,2 ; Yao, Zhengjun^1,2 ; Zhou, Jintang^1,2 ; Liu, Peijiang^1,2 ; Lei, Yiming^1,2

College of Materials and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing

211100, China^1

Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Jiangsu, China^2

关键词: Acoustic performance;    Compressive and tensile strengths;    Freeze-dried method;    Nanosized pores;    Pore morphology;    Sol-gel polymerization;    Solid contents;    Sound absorption;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/229/1/012034/pdf
DOI  :  10.1088/1757-899X/229/1/012034

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Open-pore phenolic cryogel acoustic multi-structured plates (OCMPs) were prepared via modified sol gel polymerization and freeze-dried methods. The pore morphology, mechanical, thermal and acoustic properties of the cryogels were investigated. From the experimental results, the cryogels exhibited a porous sandwich microstructure: A nano-micron double-pore structure was observed in the core layer of the plates, and nanosized pores were observed in the inner part of the micron pores. In addtion, compared with cryogel plates with uniform-pore (OCPs), the OCMPs had lower thermal conductivities. What's more, the compressive and tensile strength of the OCMPs were much higher than those of OCPs. Finally, the OCMPs exhibited superior acoustic performances (20% solid content OCMPs performed the best) as compared with those of OCPs. Moreover, the sound insulation value and sound absorption bandwidth of OCMPs exhibited an improvement of approximately 3 and 2 times as compared with those of OCPs, respectively.