Article
Engineering, Environmental
Zuzanna Kantor, Tingting Wu, Zhihui Zeng, Sabyasachi Gaan, Sandro Lehner, Milijana Jovic, Anne Bonnin, Zhengyuan Pan, Zahra Mazrouei-Sebdani, Dorina M. Opris, Matthias M. Koebel, Wim J. Malfait, Shanyu Zhao
Summary: Polymer aerogels are a promising alternative to brittle silica aerogels, but they lack high-temperature stability. Researchers have developed a new type of aerogel composite with unique structure and excellent properties, which could be used in applications requiring high mechanical strength, low thermal conductivity, and low dielectric constant.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Tingting Wu, Michal Ganobjak, Gilberto Siqueira, Zhihui Zeng, Mengmeng Li, Ekaterina Filimonova, Somayeh Saghamanesh, Anne Bonnin, Deeptanshu Sivaraman, Joshua Yip, Lei Li, Hui Wu, Gustav Nystrom, Wim J. Malfait, Shanyu Zhao
Summary: Aerogels were recognized as one of the top ten emerging technologies in chemistry by IUPAC in 2022. Their exceptional properties have led to the growth of the insulation market, but efforts are being made to explore their potential in other applications.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Engineering, Environmental
Hang Xiao, Jiang-bo Lv, Wei Tan, Xian He, Meng-hao Chen, Ke Zeng, Jiang-huai Hu, Gang Yang
Summary: Aerogel has great potential in various applications, but current freeze-drying methods have limitations. This study proposes an ultrasound-assisted freeze-drying strategy to enhance freezing efficiency and control the pore structure of aerogel, leading to significant improvements in its performance.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Yang Li, Bin Ma, Rubing Zhang, Xiaoguang Luo
Summary: This study investigated the effects of single and double crosslinking methods on the properties of polyimide aerogels. The results showed that different crosslinking methods can lead to completely opposite trends in shrinkage and density variation.
Article
Chemistry, Applied
Shima Dayarian, Liu Yang, Hojat Majedi Far
Summary: Polyimide aerogels have excellent thermal and mechanical properties. This study developed two alternative techniques using dimethyl sulfoxide solvent and epoxy to consolidate the polyimide aerogel particles into blocks or stock shapes. The techniques significantly reduced the process time and improved the appearance and mechanical properties of the samples made using epoxy. The samples made using dimethyl sulfoxide exhibited higher thermal stability and porosity compared to directly made stock shapes.
JOURNAL OF POROUS MATERIALS
(2023)
Article
Engineering, Environmental
Xianbo Hou, Yiqi Mao, Rubing Zhang, Daining Fang
Summary: The study developed a polyimide (PI) nanofiber cross-linked polyimide aerogel membrane with high flexibility, strong mechanical properties, and efficient heat insulation. Addition of nanofibers significantly enhanced the performance of aerogel, making it a potential material for applications in modern technology, military, and aerospace.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Chemistry, Physical
Yu Pan, Jin Zheng, Yangyang Xu, Xiaogang Chen, Mengmeng Yan, Jinlei Li, Xu Zhao, Yanlai Feng, Yuhan Ma, Mengyuan Ding, Rongwu Wang, Jianxin He
Summary: In this study, a polyimide aerogel with excellent mechanical strength and thermal properties was synthesized using a combination of electrospinning, freeze-drying, and in situ thermal crosslinking. The resulting aerogels exhibited low density, high porosity, high tensile strength, good compressive fatigue resistance, and excellent thermal insulation, making them excellent candidates for thermal insulation materials in high and low-temperature environments.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Fuxing Zhao, Jundong Zhu, Tangping Peng, Hao Liu, Shengzhuo Ge, Huasheng Xie, Le Xie, Chongwen Jiang
Summary: The novel polyimide composite aerogel synthesized using functionalized clay halloysite nanotubes showed excellent thermal stability, low density, and high mechanical property, making it a promising thermal management material for practical and complex insulation applications.
APPLIED CLAY SCIENCE
(2021)
Article
Polymer Science
Liyao Xiong, Weijie Zheng, Shenglong Cao, Yuying Zheng
Summary: This study successfully prepared polyimide aerogel materials with superior mechanical properties, thermal stability, and low thermal conductivity. These materials can be applied in various fields such as construction and energy, where heat and thermal insulation are required.
Article
Nanoscience & Nanotechnology
Chenyu Zhu, Tiantian Xue, Zhuocheng Ma, Wei Fan, Tianxi Liu
Summary: Aerogel fibers have great potential as thermal protective materials in harsh environments due to their high porosity and satisfactory knittability. However, the inferior mechanical property resulting from the porous structure hampers their practical application.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Multidisciplinary
Kaiqing Yao, Chonghu Song, Hong Fang, Feng Wang, Lian Chen, Shaohua Jiang, Guojun Zha, Haoqing Hou
Summary: In this study, a freeze-extraction method combined with normal vacuum-drying was developed to prepare high-performance polyimide fibrous aerogels. The resulting aerogels exhibit low density, high porosity, and excellent mechanical and thermal performance. Further modification can enhance the fire resistance and residue of the aerogels.
Article
Polymer Science
Zhuojian Wang, Fengxia Liu, Wei Wei, Chao Dong, Zhiyi Li, Zhijun Liu
Summary: A semi-continuous supercritical drying process was developed to improve the efficiency of producing polyimide aerogels. The influence of supercritical fluid parameters on the aerogel properties was investigated based on the vapor-liquid equilibrium diagram. The results showed that efficient supercritical drying was crucial for the comprehensive properties of the aerogel, and subcritical drying conditions below the critical mixture pressure also had special interest.
Article
Materials Science, Multidisciplinary
Weiwang Chen, Sha Liu, Yueyan Sun, Xiaomeng Zhou, Fenglei Zhou
Summary: In this study, the shape stability of melamine-crosslinked polyimide (MPI) aerogels at high temperatures is greatly improved through supercritical drying with ethanol. The resultant aerogels exhibit excellent thermal insulation, mechanical strength, and thermal stability, making them promising for diverse applications.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Sizhao Zhang, Zhao Wang, Jing Wang, Yunyun Xiao, Zhouyuan Yang, Hui Ji, Guangyu Xu, Shixian Xiong, Zhengquan Li, Feng Ding
Summary: This study proposes a strategy to fabricate high performance polyimide aerogels (PIA) with ultralow drying shrinkage and outstanding thermal insulation, and demonstrates the potential applications of this material in the aerospace field.
ACS APPLIED POLYMER MATERIALS
(2022)
