Article
Materials Science, Composites
Zhaoqi Niu, Beixi Chen, Shuai Shen, Haipeng Zhang, Xiaoyan Ma, Fang Chen, Luyang Li, Yi Xin, Chengshuang Zhang, Xiao Hou
Summary: By coordinating Zr4+ with Ph-O- in phenolic resin, Zr chelated hybrid phenolic resin (ZrPR) with enhanced thermal stability was obtained. ZrPR reduced the content of Ph-OH in phenolic resin and provided a metal-organic chelated point, resulting in improved ablation resistance. Carbon fiber reinforced ZrPR composites (CF/ZrPR) exhibited higher strength and lower thermal conductivity and ablation rate compared to unmodified composites (CF/PR).
COMPOSITES COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Yi Xin, Zhaoqi Niu, Shuai Shen, Xiaoyan Ma, Fang Chen, Luyao Wang, Beixi Chen, Chengzhi Wang, Chengshuang Zhang, Xiao Hou
Summary: A novel B-Si-Zr hybridized ceramicizable resin(BSZ-PR) was successfully fabricated by chemical reaction of boric acid, zirconium hydroxyl-containing polyhedral oligomeric silsesquioxane(Zr-POSS) and phenolic. The incorporation of boric acid and Zr-POSS improved the thermal stability of the resin effectively, and the flexural strength of carbon fiber/BSZ-PR and high silica fiber/BSZ-PR composites were increased significantly. Formation of ceramic structures such as SiO2, ZrO2 and SiC at high temperatures and extreme ablative conditions from BSZ-PR and its composites may be the key to the improved thermal, ablative properties.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Carolyn T. Long, Ruisong Wang, Charles Shoalmire, Dion S. Antao, Patrick J. Shamberger, Jaime C. Grunlan
Summary: Research has shown that multilayer nanocomposite films can effectively protect metal substrates from extreme heat by forming ceramic bubbles, slowing down heat transfer. This technology could be utilized to safeguard important metal components (in automobiles, aircraft, etc.) from fire-related damage or other transient high-temperature situations.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Multidisciplinary Sciences
Ahmad Safwan Ismail, Mohammad Jawaid, Norul Hisham Hamid, Ridwan Yahaya, Siti Noorbaini Sarmin, Hassan Fouad, Mohini Sain
Summary: This study investigates the influence of flax fibre loading on the dynamic thermal and mechanical characteristics of composites. The results show that the incorporation of flax into the composites improves the dynamic mechanical properties but reduces thermal stability.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2023)
Article
Materials Science, Ceramics
Hongli Liu, Peng Wang, Bo Zhang, Hongyan Li, Jing Li, Yajing Li, Zhong Chen
Summary: A simple method for preparing carbon aerogels with superior thermal insulation and mechanical properties was proposed. By adjusting the ratio of HMTA to BPR, the microstructure of the aerogels can be regulated to achieve the desired properties. The obtained carbon aerogels show high compressive strength, low density, and low thermal conductivity, making them a competitive candidate for high-temperature heat insulation materials.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Polymer Science
Yukun Ji, Quanming Ren, Xiaozhao Li, Peng Zhao, Veerle Vandeginste
Summary: This study investigates the influence of phenolic resin, silica aerogel, and hydrogen peroxide on the thermal insulation performance of fly ash geopolymer. The results show that the combination of these three modifying agents significantly reduces the thermal conductivity of fly ash geopolymer. The optimal composition scheme achieves a thermal conductivity of 0.08 W/m·K. Phenolic resin promotes the formation of a network structure and increases the porosity of micron-sized pores. Hydrogen peroxide decomposes into O2 and leaves large-diameter pores during curing. Silica aerogel reduces thermal conductivity and can react with the alkali activator to form water, creating pores after water evaporation.
Article
Materials Science, Multidisciplinary
Ruyi Sha, Xiaopeng Cheng, Jixiang Dai, Yufei Zu, Yuyan Zeng, Jianjun Sha
Summary: A lightweight phenolic resin aerogel with excellent thermal insulation and mechanical properties was successfully synthesized by using linear thermoplastic phenolic resin (LPR) and boron-modified thermosetting phenolic resin (BPR), which significantly reduced the shrinkage rate and processing time.
Article
Polymer Science
Sara Shafiee, Leila Bazli, Mohammad Karrabi, Mir Hamid Reza Ghoreishy, Milad Bazli
Summary: The effects of NBR polarity and organoclay addition on the properties of an NBR/phenolic resin blend were investigated. It was found that good distribution of nanoparticles and compatibility between NBR and phenolic resin improved the rheological and tensile properties. The addition of organoclay increased the tensile strength of the blends, while increasing nanoparticle concentration reduced the deterioration in tensile properties and Young's modulus.
Article
Polymer Science
Liang Wang, Mengxin Liu, Feihao Yang, Tao Wu, Wenhui Rao, Yuanli Liu, Chun Wei, Chuanbai Yu
Summary: In this study, mesoporous silica/phenolic resin hybrid materials were prepared by in-situ polymerization, and the influence of different mesoporous silica reinforcements on the properties of the composites was investigated. The results showed that the reinforcement of mesoporous silica improved the thermal stability and high temperature storage modulus of the composites, as well as stabilized the friction properties under high temperature conditions.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Weikai Peng, Xi Chen, Jun Wang
Summary: Combining phenolic resin and epoxy resin with polythiol and triethanolamine as curing accelerators resulted in a composite with lower curing temperature and improved mechanical properties. The research provides a theoretical basis for expanding the application range of phenolic resin and epoxy resin blending system.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Polymer Science
Sylva Holesova, Karla Cech Barabaszova, Marianna Hundakova, Michaela Scukova, Kamila Hrabovska, Kamil Joszko, Magdalena Antonowicz, Bozena Gzik-Zroska
Summary: This study focused on developing thin antimicrobial films based on biodegradable PCL with CPX and zinc oxide as active ingredients. Different structures of nanofillers had a significant impact on the final properties of the PCL nanocomposite films. The synergistic effect of CPX and ZnO combination on antimicrobial activity was proven, but it had lower mechanical resistance.
Article
Biochemistry & Molecular Biology
Yu Ren, Jin Xie, Xiahong He, Rui Shi, Can Liu
Summary: Utilizing lignin to partially replace phenol in synthesizing thermoplastic phenolic resin and preparing phenolic fiber can effectively improve the molecular structure and properties of the resin, enhance the thermal stability of the fiber, and increase the carbon yield.
Article
Materials Science, Ceramics
Shehryar Ahmad, Sanan Ali, Muhammad Salman, Abrar H. Baluch
Summary: This review article provides a comparative analysis of researches in the field of ablative composites, discussing the performance improvement needs of carbon-phenolic composite systems and the effects of different additives on the properties of composite materials.
CERAMICS INTERNATIONAL
(2021)
Article
Polymer Science
Youpei Du, Yu Xia, Zhenhua Luo, Wenjie Yuan, Kongli Xu, Qian Wang, Heng Zhou, Ying Guo, Hao Li, Tong Zhao
Summary: In this study, a hybrid phenolic resin containing silicon and boron was synthesized through addition-condensation reactions, resulting in improved residual weight at high temperatures. The hybrid resin achieved uniform dispersion of hybrid elements at the molecular level and addition curing via the presence of vinyl groups. Characterization using multiple techniques provided a detailed understanding of the synergistic effects of boron-silicon modified phenolic resin.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Polymer Science
Chenglong Zhao, Yan Qin, Xiaotian Wang, Han Xiao
Summary: This article explores the modification of fiber-reinforced phenolic resin composites by adding nitrile rubber powder to the resin. It is found that the addition of rubber powder can improve the elongation ratio and flexural properties of the composites, but it decreases the tensile strength.
