Article
Agricultural Engineering
J. Xu, N. Brodu, M. Mignot, B. Youssef, B. Taouk
Summary: The study proposes a method of producing phenol-rich wood pyrolysis bio-oil fractions using fractional condensation and water extraction methods. The polymerization process of model phenol acetaldehyde (MPA) resins, mimic resins, and bio-oil acetaldehyde (BOA) resins were studied. The results demonstrate the potential of treated bio-oil products to effectively replace commercial phenols.
BIOMASS & BIOENERGY
(2022)
Article
Chemistry, Multidisciplinary
Jie Xu, Nicolas Brodu, Boulos Youssef, Bechara Taouk
Summary: The synthesis of a greener novolac-type resin using glyoxal, upgraded bio-oil, and oxalic acid has been studied. The research demonstrated the potential of treated bio-oil products to effectively replace commercial phenol in the production of resin. The addition of biochar was found to improve the curing process by decreasing the onset temperature and activation energy.
Article
Chemistry, Multidisciplinary
Xinxin Fang, Xin Guo, Weilin Tang, Qun Gu, Yue Wu, Hua Sun, Junfei Gao
Summary: In this study, a bio-based epoxy resin, protocatechuic acid diester epoxy resin (PDEP), was successfully synthesized and characterized. The addition of PDEP to DGEBA resulted in improved impact strength and increased Tg. The use of renewable protocatechuic acid as a modifier for epoxy resin demonstrates its potential application.
Article
Chemistry, Multidisciplinary
Joao Gabriel P. Rodrigues, Santiago Arias, Jose G. A. Pacheco, Marcos Lopes Dias
Summary: Biobased vitrimers were successfully obtained by using zinc acetate and ZnAl-layered double hydroxide as transesterification catalysts for the reaction between epoxidized canola oil and lactic acid. The presence of catalysts led to lower enthalpies of cure and decreased material gel content, resulting in materials with rubber-like properties.
Article
Green & Sustainable Science & Technology
Rui Diao, Chu Wang, Zejun Luo, Xifeng Zhu
Summary: The study investigated the co-pyrolysis of walnut shells and bio-oil distillation residues to produce bio-oils, with analysis of the effect of lyophilization. The results showed that temperature and mass ratios significantly influenced the bio-oil yield and element distribution, leading to increased phenols in the bio-oils.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Jie Xu, Nicolas Brodu, Lokmane Abdelouahed, Chetna Mohabeer, Bechara Taouk
Summary: A bio-oil-based epoxy resin was synthesized using phenolic compounds from beechwood pyrolysis oil, and it was used as a curing agent to replace traditional chemicals. The research shows that this epoxy resin has lower curing temperature and activation energy, making it suitable for the synthesis of high-thermal performance and sustainable resins.
Article
Chemistry, Applied
Hao Guan, Zhiyong Li, Qinlong Xu, Jingjing Meng, Kai Guo
Summary: A multifunctional epoxy resin derived from sustainable resveratrol and phloroglucinol shows excellent mechanical properties, heat resistance, and flame retardancy, making it suitable for lightweight, fireproof, and heat insulation engineering.
REACTIVE & FUNCTIONAL POLYMERS
(2023)
Article
Chemistry, Analytical
Brenda J. Alvarez-Chavez, Stephane Godbout, Vijaya Raghavan
Summary: The study evaluates the impact of fractional condensation on the properties of pyrolytic oil by assessing the number of condensation stages and temperatures used in the bio-oil recovery process. It was found that using three condensation stages resulted in a 35% increase in condensation efficiency. Two fractions of bio-oil obtained at different condensing temperatures exhibited distinct moisture content and liquid yield. Additionally, a quantitative analysis of acids and furans in the third bio-oil fraction showed the presence of various acids, with butyric acid being the most abundant component.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Biotechnology & Applied Microbiology
Asmita Khanal, Ashish Manandhar, Sushil Adhikari, Ajay Shah
Summary: This study analyzed the techno-economic feasibility of producing novolac resin by partially substituting petroleum-derived phenol with biomass-based phenol in the U.S. The results showed that the production of biobased novolac resin is economically feasible at the current state of technology and could be an important outlet for diversifying the use of bio-oil.
BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR
(2021)
Article
Energy & Fuels
J. Xu, N. Brodu, L. Abdelouahed, B. Taouk
Summary: The storage stability of bio-oils obtained from beech wood intermediate pyrolysis was improved using a combination of three-stage condensation and an additional water extraction system. The physicochemical properties and composition of the bio-oil were studied during aging at different storage temperatures and times, revealing changes in chemical composition. The bio-oil stored at 4 degrees C and room temperature for 4 weeks showed relatively high stability, while the bio-oil stored at 50 degrees C experienced significant changes in chemical composition. The additional water extraction step improved the stability of the water-insoluble fractions, but the water-soluble fractions were not as stable as before extraction.
Article
Materials Science, Composites
Mengying Li, Jun Xiao, Xingbang Wang, Xiao Yang, Xiaodong Chen
Summary: A high-performance compound epoxy resin system suitable for wet filament winding was designed with improved properties. Through comparing the curing behavior of thermal and microwave curing composites, it was found that microwave curing exhibited higher curing degree and reaction rate in the early and middle stages. However, in the later stages of curing, the difference between the two methods was minimal.
POLYMER COMPOSITES
(2021)
Article
Engineering, Electrical & Electronic
Jin Li, Pengxiang Guo, Yuhuai Wang, Qi Wang, Boxue Du
Summary: This study investigated the high-temperature dielectric properties of DGEBA/MHHPA/DMP-30 system and found that the postcuring time had an impact on the high-temperature insulation performance. Epoxy resins with 90% precuring degree generally had better high-temperature dielectric properties compared to those with 80% precuring degree.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2023)
Article
Green & Sustainable Science & Technology
Rui Diao, Yitao Huang, Chu Wang, Xifeng Zhu
Summary: With the coupling of torrefaction and KOH impregnation, a fractional process was proposed for the valorization of bio-oil distillation residue (DR). The results showed that low-temperature torrefaction enhanced the pyrolysis rate, while high-temperature torrefaction weakened it. The fractional pretreatment accelerated the reaction rates and directed the product distribution.
JOURNAL OF CLEANER PRODUCTION
(2022)
Correction
Chemistry, Multidisciplinary
Xuebing Chen, Weijiao Jiang, Bo Hu, Zhiming Liang, Yue Zhang, Jian Kang, Ya Cao, Ming Xiang
Summary: The paper titled "Correction for 'Effects of graphene oxide size on curing kinetics of epoxy resin'" by Xuebing Chen et al. discusses the impact of graphene oxide size on the curing kinetics of epoxy resin. The study provides insights into the significant influence of graphene oxide size on the curing process of epoxy resin and proposes a correction model to predict the effects of graphene oxide with different sizes.
Article
Chemistry, Multidisciplinary
Yu-xuan Xu, Xing-guo Zhao, Xiang Dong, Guang-long Dai
Summary: Silane agents were used to synthesize organic-modified nickel phyllosilicates (NiPS), which were then introduced into epoxy resin (EP) to form composites. The effects of these organic-modified NiPS on the curing behavior and flammability of epoxy composites were carefully investigated. The addition of NiPS resulted in a narrower curing temperature range and decreased activation energy, indicating a lowered energetic barrier. The presence of these organic-modified NiPS also enhanced the self-extinguishing ability and limited oxygen index of the composites, and a solid phase flame retardant mechanism was proposed.
Article
Engineering, Chemical
Xu Yang, Jieshi Xiao, Jian Huang, Kaixiang Peng
Summary: This study introduces an online convolutional adversarial autoencoder (AAE) model to learn representative industrial process information. By extracting features that reflect diverse information and follow a Gaussian distribution, the model improves the accuracy of fault detection and removes redundant information through a feature selection strategy.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)
Article
Engineering, Chemical
Shao-Yang Wu, Meng-Tsun Lai, Chung-Hui Hsu, Kevin C. W. Wu, Yesong Gu
Summary: This study investigated the effectiveness of using Fe-based MOF or MIL-100(Fe) in conjunction with a PEDOT-modified Pt electrode for detecting the synthetic azo dye tartrazine. By modifying the electrode with two different methods, favorable lower reductive potentials, competitive sensitivities, and good repeatability and stability were achieved in all MIL-100(Fe)/PEDOT/Pt electrodes.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)