Article
Polymer Science
Haichao Meng, Long Ni, Cuiqing Zhou, Chen Qiu, Yinfu Luo, Huawei Zou, Shengtai Zhou, Mei Liang
Summary: Rigid polyimide foams (PIFs) with good mechanical properties and thermal resistance were successfully fabricated through thermal foaming of polyester ammonium salt precursors with the addition of a pararosaniline base as a crosslinker. The crosslinked structure derived from the base improved melt viscosity and provided sufficient strength to prevent shrinkage, leading to enhanced compressive properties. The PIFs exhibited a 6.6 to 7.9 times increase in compressive strength compared to regular polyimide foams, and their thermal properties were also excellent.
Article
Polymer Science
Yue Tian, Yinfu Luo, Haichao Meng, Long Ni, Cuiqing Zhou, Shengtai Zhou, Huawei Zou, Mei Liang
Summary: Lightweight polyimide foams (PIFs) with exceptional thermal resistance and compressive properties are fabricated by heating polyester ammonium salts (PEASs) prepared by copolymerizing 4, 4'-diaminobenzanilide (DABA), 4, 4'-diaminodiphenyl methane (MDA), and 3, 3', 4, 4'-benzophenone tetracarboxylic dianhydride (BTDA). The addition of DABA forms hydrogen bonds between CONH and C=O in the PI chains, increasing the melt viscosity of PEAS precursors and promoting the expansion of cells.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Yinfu Luo, Long Ni, Xueqin Zhang, Xinyue Jiang, Huawei Zou, Shengtai Zhou, Mei Liang, Pengbo Liu
Summary: Rigid polyimide foams with excellent compressive and thermal properties were fabricated by thermal foaming, and the melt viscosities played a crucial role in improving foam cell interactions and mechanical properties.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Polymer Science
Yawei Shi, Aijun Hu, Zhiyuan Wang, Kedi Li, Shiyong Yang
Summary: Closed-cell rigid polyimide foams with excellent thermal stability and combined properties were prepared by thermal foaming of a reactive end-capped polyimide precursor powder in a closed mold, showing outstanding thermal stability and compression creep deformation resistance.
Article
Materials Science, Multidisciplinary
Yawei Zhang, Shuangshuang Li, Xinwei Tang, Wei Fan, Qianqian Lan, Le Li, Piming Ma, Weifu Dong, Zicheng Wang, Tianxi Liu
Summary: In this study, a precisely designed and controllably constructed polyimide-based graphene foam with an ordered lamellar structure was developed. The foam exhibits efficient broadband electromagnetic absorption performance, and the absorption properties can be adjusted by optimizing the impedance distribution and microstructure of the foam.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Polymer Science
Long Ni, Yinfu Luo, Guanchun Wang, Liwei Yan, Shaoyu Qiu, Mei Liang, Shengtai Zhou, Huawei Zou
Summary: In this study, a facile method was proposed to fabricate flexible polyimide (PI)/rGO composite foams with anisotropic pore structures through microwave-assisted foaming and thermal imidization treatment. The PI/rGO composite foams were used as starting materials for preparing carbon foams with excellent anisotropic thermal insulation and electromagnetic interference shielding applications. The results showed that the carbon foams exhibited increasing electrical conductivity and EMI shielding effectiveness with increasing rGO content.
Article
Chemistry, Multidisciplinary
Hamed Issaoui, Pedro L. de Hoyos-Martinez, Virginie Pellerin, Marie-Anne Dourges, Herve Deleuze, Serge Bourbigo, Fatima Charrier-El Bouhtoury
Summary: Biosourced phenolic foams based on lignin alkaline liquor and tannins were successfully synthesized without using formaldehyde and blowing agent. The foams prepared at lower curing temperatures showed improved structural homogeneity, while those under alkaline catalysis exhibited the best thermal stability and fire resistance.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Long Ni, Yinfu Luo, Chen Qiu, Lu Shen, Huawei Zou, Mei Liang, Pengbo Liu, Shengtai Zhou
Summary: Mechanically flexible polyimide foams with exceptional high temperature thermal insulation properties were successfully fabricated by microwave-assisted foaming and thermal imidization process using polyester ammonium salt precursor powders with different molecular chain structures. The introduction of copolymerized dianhydride structure improved the cellular structure and mechanical flexibility of the foams. The micron-scale cellular structure of the foams was determined by melt viscosity, chain rigidity, volatile content, and foaming temperatures.
MATERIALS TODAY PHYSICS
(2022)
Article
Engineering, Chemical
Yinfu Luo, Long Ni, Liwei Yan, Huawei Zou, Shengtai Zhou, Mei Liang
Summary: This study focuses on the influence of chain structure on the properties of polyimide foams, highlighting the importance of different chain structures in determining the mechanical, thermal, and morphological properties of the foams. Specifically, polyimide foams derived from certain dianhydrides and diamines exhibit the highest compressive strength and thermal stability, indicating potential applications in aerospace, aeronautics, marine use, and transportation.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Polymer Science
Shuhuan Yun, Xianzhe Sheng, Shengli Wang, Xing Miao, Xuetao Shi, Yongsheng Zhao, Jianbin Qin, Guangcheng Zhang
Summary: In this study, polyester ammonium salt (PEAS) precursor powders were synthesized and used to prepare polyimide foam (PIF) via a stepwise heating thermo-foaming approach. The fabricated PIFs exhibited uniform pore structure, lightweight, high heat resistance, thermal insulation properties, and excellent flame retardancy.
Article
Materials Science, Ceramics
Pornnapa Pipattanaporn, Pimporn Pansiri, Pornsawan Kumpeerakij, Sila Yaemphutchong, Patompong Siri-apai, Natapol Suetrong, Kantapat Chansaenpak, Suparat Singkammo, Pongsakorn Kanjanaboos, Yuranan Hanlumyuang, Suttipong Wannapaiboon, Worawat Wattanathana
Summary: The study focused on the successful preparation of high crystallinity and purity ZnAl2O4 via thermal decomposition of the metal complex precursor using triethanolamine (TEA) as the additive and chelating agent. The results showed that the ZnAl2O4 powders derived from this method are superior in terms of crystallinity, phase purity, and optical properties compared to those without using TEA.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Jianwei Li, Jun Lin, Yugen Wang, Wei Chu, Fei Liu, Bin Wang
Summary: In this work, cross-linked and rigid polyimide (PI) composite foams with low density, high mechanical strength, thermal stability, fire resistance, ultralow dielectric characteristics, and excellent wave transparency were successfully fabricated, making them attractive candidates for applications in the aviation and aerospace fields.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Polymer Science
Long Ni, Yinfu Luo, Xionghou Peng, Shengtai Zhou, Huawei Zou, Mei Liang
Summary: Polyimide foam has been utilized as structural and thermal insulation materials due to its nearly homogeneous spherical closed pore structure and outstanding thermal stability. The prepared foam shows extremely low thermal conductivity and thermal diffusivity, which makes it ideal for applications in high-tech fields such as aerospace, marine transportation, and microelectronics.
Article
Construction & Building Technology
Junyi Jiang, Baoju Liu, Jinyan Shi, Osman Gencel, Xiang An, Jiafeng Gao
Summary: This study aimed to investigate the synergistic effect and mechanism of glycine and triethanolamine (TEA) in mortars. The results showed that incorporating glycine alone can improve the mechanical properties of mortar by promoting the hydration of C3A. Adding a small amount of TEA further enhanced the performance of the mortar, and the combination of 1% glycine and 0.04% TEA exhibited the optimum mechanical properties and impermeability. Both glycine and TEA acted as ionic complexing agents, and their synergistic mechanism was reflected in the difference of their complexing ions and complexing orders.
JOURNAL OF BUILDING ENGINEERING
(2022)
Review
Materials Science, Multidisciplinary
Julien Peyrton, Luc Averous
Summary: Polyurethanes (PU) are versatile materials obtained by combining polyols and polyisocyanates, with a global market of $50 billion. They are used in various applications, with flexible and rigid foams being the main types for furniture, automotive, bedding, insulation, and construction markets. Future trends involve using high-performance biobased materials with low environmental impact.
MATERIALS SCIENCE & ENGINEERING R-REPORTS
(2021)
Article
Polymer Science
You Wu, Yujuan Jin, Jian Huang, Huafeng Tian, Yunxuan Weng
Summary: The experiment synthesized Phenyl terminated hyperbranched polyesters (HBP-Bs) for toughening poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) directly by melt blending. It was found that adding HBP-Bs significantly decreased the crystallinity, increased impact strength and elongation at break of the PHBV blends, and improved the microstructure of the blends.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Manufacturing
Yuge Ouyang, Liuyang Bai, Huafeng Tian, Xiaofei Li, Fangli Yuan
Summary: This paper reviews the current progress in the development of Al2O3 reinforced polymer composites, including preparation methods, heat conduction mechanisms, factors affecting thermal conductivity, methods for improving thermal conductivity, and emerging applications. It also identifies several outstanding issues that need to be addressed in order to achieve higher thermal conductivity.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Agriculture, Multidisciplinary
Lei Kuang, Qianqian Zhang, Jinlong Li, Huafeng Tian
Summary: The core task of designing lipase catalytic systems is to create a suitable oil-water interface for lipase distribution. In this study, sandwich-type lipase-membrane bioreactors (SLMBs) were fabricated using a layer-by-layer electrospinning process. These SLMBs demonstrated improved catalytic efficiency compared to free lipase, as well as better pH adaptability, temperature resistance, storage stability, and reusability.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2022)
Article
Polymer Science
Yansong Huang, Yujuan Jin, Bo Wang, Huafeng Tian, Yunxuan Weng, Kangdi Sun, Shuang Men
Summary: The addition of long-chain hyperbranched polymers (LCHBPs) improved the compatibility between PLA and CA, promoted the crystallization of PLA, and enhanced the mechanical and thermal properties of the blend materials.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Environmental
Yansong Huang, Yujuan Jin, Bo Wang, Huafeng Tian, Yunxuan Weng, Shuang Men
Summary: The study successfully improved the compatibility of PLA/CA blends by introducing PAMAM dendrimer, enhancing the mechanical properties of the material, and increasing biodegradability. The blend film with added PAMAM exhibited excellent performance and showed potential for wide application in the field of food green packaging.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Chemistry, Applied
Ying Zhang, Aimin Xiang, Xiaoying Lu, Hongfu Zhou, Duoyuan Yin, Huafeng Tian
Summary: The study found that the comonomer type and crystallinity of PE materials have a significant impact on the SH modulus, while the molecular weight distribution in the range of 1 x 10(3) to 1 x 10(5) contributes to the establishment of the crosslinked molecular network, and higher crystallinity and thinner thickness are beneficial for obtaining a higher measured SH modulus.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Hongtao Liu, Yi Guo, Huafeng Tian, Yuanyuan Yao, Qian Liu, Aimin Xiang, Hongfu Zhou
Summary: In this study, red phosphorus grafted graphene oxide was successfully incorporated into polyimide foam matrices using a novel method, resulting in significant improvements in the mechanical, thermal, and flame resistance properties of the foam. SEM analysis showed a reduction in cell size and homogenization, while specific strength increased notably.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Forestry
Cheng Li, Yang Tang, Yujie Wang, Xiaoyu Yuan, Bengang Zhang, Zhigang Wu, Huafeng Tian
Summary: The study compared the performance of wood adhesive prepared using Broussonetia papyrifera waste leaf protein to soy protein adhesive. Both proteins were found to easily form three-dimensional crosslinked network structures, but the crosslinking reaction of B. papyrifera leaf protein-based adhesive was more complex and had weaker properties compared to soy protein adhesive.
Article
Food Science & Technology
Yue Yuan, Xin Geng, Hua Wu, Rakesh Kumar, Juan Wang, Junsong Xiao, Huafeng Tian
Summary: The chemical composition and antibacterial activities of five tea tree essential oils were analyzed. The oil of Melaleuca leucadendron Linn. showed the best antimicrobial effects. Coacervation between gelatin and gum Arabic was investigated, and microcapsules with smaller particle size and greater encapsulation efficiency were obtained through microfluidization.
JOURNAL OF FOOD PROCESSING AND PRESERVATION
(2022)
Article
Engineering, Environmental
Xiaolong Han, Yujuan Jin, Jian Huang, Huafeng Tian, Maolin Guo
Summary: Hyperbranched polymer with flexible long chains was synthesized and used to toughen poly(3-hydroxybutyrate-co-3-hydroxyvalerate). The blends showed decreased crystallinity, increased impact strength, and elongation at break compared to the pure polymer.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Engineering, Environmental
Ruru Huang, Yane Zhang, Aimin Xiang, Songbai Ma, Huafeng Tian, Yuge Ouyang, A. Varada Rajulu
Summary: SEM, DSC, and XRD were used to investigate the influence of talc on the crystallization properties and morphology of PVA/talc composite films. The addition of talc improved the crystallinity of PVA and regulated the crystallization rate and uniformity of wafer thickness.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Engineering, Environmental
Yao He, Huafeng Tian, Aimin Xiang, Songbai Ma, Duoyan Yin, A. Varada Rajulu
Summary: In this study, a new nano-adsorbent graphene oxide was introduced to improve the adsorption performance of polyvinyl alcohol nanofibers. The results showed that PVA/GO nanofiber film had greatly enhanced adsorption of Cu2+, MB, and CR.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Polymer Science
Jianjian Sun, Yansong Huang, Yujuan Jin, Huafeng Tian, Shuang Men
Summary: In this study, highly aromatic hyperbranched polyamide (HBPA) was synthesized and used as a modifier to enhance the physical performance of polylactic acid (PLA). The results showed that the addition of HBPA significantly improved the tensile strength and fracture energy of PLA. Polarized optical microscope images suggested that HBPA acted as a nucleating agent for PLA during crystallization, possibly due to the formation of hydrogen bonds and/or chemical crosslinking between HBPA and PLA.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Environmental
Yaxin Zhao, Huafeng Tian, Yuge Ouyang, Aimin Xiang, Xiaogang Luo, Xingwei Shi, Songbai Ma
Summary: In this study, the gas separation performance and mechanical properties of PVA/Cu2+ membranes were improved by introducing PAMAM. The addition of PAMAM significantly enhanced the crystallinity and mechanical properties of the membranes, and resulted in efficient separation efficiency and high selectivity of the gas separation process.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Chemistry, Physical
Yiheng Song, Jiangkai Bao, Yang Hu, Haopeng Cai, Chuanxi Xiong, Quanling Yang, Huafeng Tian, Zhuqun Shi
Summary: This study fabricated an all-polymer based TENG device with a forward polarization effect, which was achieved by oriented electrospinning of PVDF films, resulting in improved triboelectric output performance. Additionally, the all-polymer based electrode layers demonstrated the advantages of sustainability and cost-effectiveness.
SUSTAINABLE ENERGY & FUELS
(2022)
