Article
Materials Science, Multidisciplinary
Edgar H. H. Wong, Ka Wai Fan, Lei Lei, Cheng Wang, Juan Carlos Baena, Henry Okoye, Winny Fam, Dewen Zhou, Susan Oliver, Arslan Khalid, Guan Heng Yeoh, Chun H. Wang, Cyrille Boyer
Summary: A new method using halogen-free nature-inspired coatings to fabricate highly fire-resistant flexible PUF has been developed in this study, which is environmentally friendly and sustainable. The coatings offer excellent flame-retardant properties and could potentially meet the highest global industry standard.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Mengqing Zhou, Sijia Zhao, Keqing Zhou, Fuding Mei, Xiaodong Qian, Congling Shi
Summary: In this study, flexible polyurethane foam modified with FeOOH nanoparticles was successfully fabricated through a hydrothermal method, showing significant improvements in hydrophobicity, oleophilicity, adsorption capacity, reusability, and flame retardant properties. The introduction of FeOOH enhanced the absorption performance and flame retardancy of the foam material, making it a promising candidate for oil/water separation applications.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Polymer Science
Kyung-Who Choi, Jun-Woo Kim, Tae-Soon Kwon, Seok-Won Kang, Jung-Il Song, Yong-Tae Park
Summary: The study developed an eco-friendly, high-performance flame-retardant coating agent by coating polyurethane foam with cationic starch (CS) and montmorillonite (MMT) nano-clay using a spray-assisted layer-by-layer (LbL) assembly. Experimental results confirmed that the coating significantly reduced the heat release rate and total heat release of the foam, improving its fire retardancy. Additionally, durability testing showed the long-lasting flame retardancy of the LbL coating even after more than 1000 compressions.
Article
Materials Science, Multidisciplinary
Hyewon Song, Cheol Hyun Park, Sun Hwan Jeong, Jun Hyuk Heo, Jung Heon Lee
Summary: Considering the persistent problem of fire safety in polymeric materials, including polyurethane foam, there is a growing demand for flame retardants (FRs). This study demonstrates the successful coating of PU foam with a layer-by-layer assembly of adenosine triphosphate (ATP) and chitosan (CS) as an effective FR. The coated PU foam exhibited excellent fire retardancy, with a high limiting oxygen index value, reduced heat release rate, and decreased smoke release.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Mechanics
Wenfei Ji, Qicheng Zhang, Fernando Alvarez-Borges, Guanjie Yuan, Jeroen Van Duijneveldt, Wuge H. Briscoe, Fabrizio Scarpa
Summary: Flexible polyurethane foam composites with enhanced stiffness and energy dissipation were synthesized by layer-by-layer assembly of nanoclay/chitosan multilayers onto foam struts. The composite foams exhibited significant improvements in mechanical properties and energy dissipation compared to uncoated pristine foam. The layer-by-layer coated foam showed a higher dynamic modulus and reduced impact force transmission, demonstrating its superior performance in energy dissipation.
COMPOSITE STRUCTURES
(2023)
Article
Energy & Fuels
Yangui Chen, Hongzhou He, Zhongqing Liu
Summary: This study investigated the combustion behavior and numerical modeling of flexible polyurethane foam, showing that the modeling results are in good agreement with experimental results under specific conditions, but still exhibit some deviations.
Article
Chemistry, Multidisciplinary
Dongju Yun, Jung Hyeun Kim
Summary: The sound absorption properties of PU composite foams can be significantly improved by adjusting the particle concentration and optimizing the cavity and pore structure of the material.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Ting-Ting Li, Peiyao Liu, Hongyang Wang, Wenna Dai, Jie Wang, Zhike Wang, Bing-Chiuan Shiu, Ching-Wen Lou, Jia-Horng Lin
Summary: A flexible polyurethane foam composite filled with expanded vermiculite powder and covered by concave-convex structural panel was synthesized to improve compression and cushioning properties. The addition of expanded vermiculite decreased the energy required for pore nucleation and increased compression property, while a smaller size of vermiculite resulted in denser foam pore diameter. The concave-convex structural panel significantly enhanced compression properties and cushion efficiency compared to pure PU foam.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Polymer Science
Pengfei Jia, Wenhua Cheng, Jingyi Lu, Zhenting Yin, Zhoumei Xu, Liang Cheng, Yong Qiu, Lijun Qian, Yuan Hu, Weizhao Hu, Bibo Wang
Summary: The binary hybrid nanocoating consisting of graphene oxide and octaamino polyhedral oligomeric silsesquioxane has shown significant improvement in enhancing the flame retardancy and smoke suppression properties of flexible polyurethane foam. The hybrid FPUF exhibits better combustion characteristics and mechanical properties, providing better safety and reliability.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Polymer Science
Ching-Wen Lou, Sheng Chu, Peiyao Liu, Xiaomeng Wang, Jia-Horng Lin, Ting-Ting Li
Summary: Polyurethane (PU) foam is widely used in various fields due to its exceptional mechanical properties. This study aimed to construct spring-like sandwich-structured flexible PU foam composites (SFFCs) to enhance the cushioning properties of PU. The incorporation of warp-knitted spacer fabrics (WKSFs) with spring-like structures significantly improved the mechanical properties and cushioning performance of the PU. The SFFCs retained excellent compressive properties even after multiple compression cycles, indicating their potential in providing improved cushioning properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Qi Jiang, Ping Li, Yun Liu, Ping Zhu
Summary: To solve the flammability and dripping issues of flexible polyurethane foam (FPUF), a coating was prepared on its surface using phytic acid (PA), Fe-2(SO4)(3)center dot xH(2)O, and laponite (LAP). The FPUF/PA-Fe/LAP showed good flame-retardant performance, passing the UL-94 V-0 rating and reducing the peak heat release rate and maximum smoke density. The fire growth rate index was also significantly reduced. Additionally, the coating had a minor effect on compression and permanent deformation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Polymer Science
Andrey Pereira Acosta, Caio Gomide Otoni, Andre Luiz Missio, Sandro Campos Amico, Rafael de Avila Delucis
Summary: This study explores the use of banana and bergamot peels as fillers in the development of rigid polyurethane foam composites. The results show that the addition of up to 15% of fillers can improve the thermal stability and cell size of the composites, while maintaining similar water uptake, density, compressive strength, and color properties compared to neat RPUF.
Article
Polymer Science
Said El Khezraji, Suman Thakur, Mustapha Raihane, Miguel Angel Lopez-Manchado, Larbi Belachemi, Raquel Verdejo, Mohammed Lahcini
Summary: Foam products are one of the largest markets for polyurethane, but current production processes are toxic and environmentally unfriendly. This study synthesized flexible polyurethane foam using a non-toxic bismuth catalyst, which showed improved mechanical properties and thermal stability compared to conventional tin-catalyzed foam. The high solubility and Lewis acidity of bismuth triflate benefits the production of polyurethane foams.
Article
Polymer Science
Gabriel Kiss, Gerlinde Rusu, Geza Bandur, Iosif Hulka, Daniel Romecki, Francisc Peter
Summary: The study showed that using recycled polyol as a replacement for fossil-based polyol in flexible polyurethane foam production can maintain similar physical properties at low density. By optimizing the formulation at high levels of recycled polyol, it is possible to reduce the emission of volatile organic compounds, opening the way for further studies to increase PU waste reutilization and decrease petroleum-based raw materials.
Article
Chemistry, Physical
Qi Jiang, Ping Li, Bin Wang, Jiu-Hua She, Yun Liu, Ping Zhu
Summary: Inorganic-organic hybrid coatings showed excellent flame-retardant properties and reduced the generation of toxic gas substances when applied to flexible polyurethane foam.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Polymer Science
Zhongming Yuan, Hiroko Yamamoto, Shinji Kanehashi, Takeshi Shimomura
Summary: This study reports the synthesis of a flexible light-emitting polymer film using a solution blending method. The selective positioning of MEH-PPV molecules in the PS phase of the film was confirmed. The film exhibited a nanometer-scale luminescent domain with low aggregation quenching and showed good elastomeric characteristics.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2024)