Article
Polymer Science
Tariq Aziz, Sahid Mehmood, Fazal Haq, Roh Ullah, Farman Ullah Khan, Bakhtar Ullah, Muhammad Raheel, Mudassir Iqbal, Asmat Ullah
Summary: The research article discusses the results of nano-silica composites filled with different epoxy contents, showing enhanced thermal and mechanical properties. The study prepared high purity silica-based nanocomposites and used modified nano-SiO2 particles as fillers, which improved compatibility with epoxy resin and dispersion in the matrix for better performance.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Huadong Zhang, Zhongyi Yan, Zhizhou Yang, Qiuhong Mu, Dan Peng, Hui Zhao
Summary: Two low melting point phthalonitrile monomers containing flexible glycidyl groups were synthesized and their polymerization and thermal properties were investigated. The results showed that the introduction of the glycidyl groups greatly improved the processability of the phthalonitrile resin and resulted in polymers with excellent thermal stability and mechanical performance after curing at 300 degrees Celsius.
Review
Polymer Science
Bijender Kumar, Dickens O. Agumba, Duc H. Pham, Hyun Chan Kim, Jaehwan Kim
Summary: This review article discusses the synthesis, properties, and applications of EU-based resins in coating applications, emphasizing their excellent performance and potential for development. Despite limited research, the interest in design strategies and properties of EU-based resins has been increasing due to their low cost and environmentally friendly characteristics.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Jiajia Ye, Qiusha Li, Shuai Zhang, Xiaobo Liu
Summary: In this study, a modified resin with higher reactivity and lower curing temperature was successfully synthesized by introducing melamine moiety into phthalonitrile. The modified resin formed various chemical structures during the reaction process, showing higher thermal stability.
Article
Chemistry, Multidisciplinary
Jong-Ho Back, Yonghwan Kwon, Hyeju Cho, Huesoo Lee, Dowon Ahn, Hyun-Joong Kim, Youngchang Yu, Youngdo Kim, Wonjoo Lee, Min Sang Kwon
Summary: Current technological advances require the development of advanced adhesives with UV-blocking abilities for use in foldable smartphones and other flexible displays. A new acrylic resin that can be cured using visible light without oxygen removal is presented, along with a novel photocatalyst and additives that facilitate rapid curing under visible light, resulting in UV-blocking adhesive films with high transparency.
ADVANCED MATERIALS
(2023)
Article
Agricultural Engineering
Maoping Lyu, Xiangyu Yang, Jing Li, Fei Xie, Hebo Shi, Xinhu Gong, Xusheng Huang, Dandi Fang, Chaoqun Zhang
Summary: Developing novel multifunctional polymeric materials from biomass to replace traditional electric encapsulation materials is significant for energy consumption and sustainable development. This study prepared bio-based epoxy thermosets from different epoxidized plant oils and investigated their properties and structure. Among them, soybean oil-based thermoset showed superior performance and was identified as a suitable candidate for encapsulation materials.
INDUSTRIAL CROPS AND PRODUCTS
(2024)
Article
Polymer Science
Guilherme dos Santos Sousa, Gabriel Felipe Guimaraes, Edilmar Marcelino, Jose Eduardo Petit Rodokas, Arilson Jose de Oliveira Junior, Ivana Cesarino, Alcides Lopes Leao, Carla dos Santos Riccardi, Mohammad Arjmand, Rafael Plana Simoes
Summary: The study evaluated the efficiency of different resin composite photoactivation protocols in reducing shrinkage stress and temperature variation during photopolymerization. The results showed that exponential and pulse-delay methods were effective in reducing shrinkage stress, with exponential method resulting in lower temperature increases. However, all photoactivation protocols did not cause damage in the restoration area, and the depth of cure experiments indicated that alternative photoactivation protocols did not harm polymerisation, with the exponential protocol being identified as the best for practical applications.
Article
Chemistry, Physical
Junli Zhu, Liquan Wang, Jiaping Lin, Lei Du, Qixin Zhuang
Summary: The study investigates the effect of different curing reaction types on imide oligomers, finding that cycloadditions like cyclotrimerization and Diels-Alder reaction lead to rigid structures and high moduli in thermosets, while radical reactions enhance toughness. By using molecular dynamics simulations and theoretical studies to design various curing procedures, significant differences in properties of cured polymers from different curing ways were observed, providing guidance for optimizing the preparation of high-performance resins.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Changjun Gong, Xiaohan Huang, Shuaikang Lv, Jixian Li, Junkun Tang, Farong Huang
Summary: In this study, three novel poly(silylene arylacetylene)s containing the hexafluoroisopropylidene structure were synthesized and their effects on mechanical and dielectric properties were investigated. The resins exhibited good solubility, processability, high thermal stability, improved dielectric properties, and high mechanical strength. The resulting composites showed excellent mechanical properties and wave transparency.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Polymer Science
Hudson Alves Silverio, Andressa Rosa Perin Leite, Marcela Dantas Dias da Silva, Rosana Maria Nascimento de Assuncao, Ana Carolina Pero, Daniel Pasquini
Summary: This study demonstrates that the incorporation of both modified and unmodified cellulose nanocrystals (CNC) significantly improves the flexural strength of denture resin, especially the particles with chemically modified surfaces. This improvement provides a new direction for enhancing the mechanical properties of acrylic resins.
Article
Polymer Science
Chunyan Qu, Xiao Zhang, Dezhi Wang, Xupeng Fan, Hongfeng Li, Changwei Liu, Hao Feng, Ruikun Wang, Ke Guo, Yanan Tian, Yang Liu
Summary: The study investigates the reduction of residual stress in silicon devices using modified epoxy resins, enhancing toughness and decreasing curing and thermal cycle stresses. The comprehensive evaluation method proposed in this study may be extended to the modification of epoxy coatings in the future.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Thermodynamics
Davide Carlevaris, Cinzia Menapace, Giovanni Straffelini, Luca Fambri
Summary: This study investigates the thermal properties of two different benzoxazine resins as potential binders for brake pads. The results show that benzoxazine resins have lower mass loss and promising tribological performance.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Materials Science, Characterization & Testing
Herman de Beukelaer, Marieke Hilhorst, Yarek Workala, Evelien Maaskant, Wouter Post
Summary: This study offers an overview of the processing and performance properties of various biobased and biodegradable plastic materials currently available commercially, showing that these materials can meet most functionalities offered by fossil-based polymers, if considered favorable at end-of-life.
Article
Polymer Science
Yumei Bai, Fan Zhao, Jun Shen, Yuehong Zhang
Summary: A water-resistant adhesive for plywood panels for engineered wood floors was developed using thermal-chemically treated wheat flour, polyvinyl alcohol, and polymeric diphenylmethane diisocyanate as the cross-linker. Studies showed that the water resistance of the thermal-SDS-treated WF-based adhesive was significantly improved, mainly attributed to the formation of a three-dimensional crosslinking network, Maillard reaction, and increased crosslinking.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Chemical
Zhigang Yuan, Lei Wang, Caizhao Liu, Xugang Zhang, Mingming Sun, Bin Zhang, Mehdi Derradji, Jianhui Li, Caiyu Song, Bo Liu
Summary: A novel biobased allyl compound with Schiff-based structure (MPAM) was developed to improve the toughness and thermal properties of 4,4'-bismaleimidodiphenylmethane (BDM). BDM/DBA-MPAM blend resins (BD-MPAM resins) were prepared and the effects of MPAM content on the curing behavior, thermal and mechanical properties were discussed. The modified resins showed improved thermal stability and enhanced flexural strength and modulus compared to BD resin. The impact strength of BD-10 wt% MPAM was the highest.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Chemistry, Applied
Sadra Souzanchi, Laleh Nazari, Kasanneni Tirumala Venkateswara Rao, Zhongshun Yuan, Zhongchao Tan, Chunbao (Charles) Xu
Summary: This study demonstrated the use of industrial-grade sugar syrups derived from corn and wood as cost-effective and competitive feedstocks for 5-HMF production. The catalyst used showed stability and could be regenerated in-situ, although it resulted in slightly lower glucose conversion and reduced 5-HMF yield compared to the fresh catalyst. The humins produced during the reaction exhibited high aromaticity and contained a high degree of unsaturated compounds.
Article
Engineering, Chemical
Rosa Arredondo, Zhongshun Yuan, Dennise Sosa, Anthony Johnson, Ramon Filipe Beims, Hongwei Li, Qiang Wei, Chunbao Charles Xu
Summary: Superabsorbent polymers (SAPs) have high water absorbability and are widely used in agriculture. However, bio-based SAPs, which are environmentally friendly, have drawbacks such as time-consuming synthesis and low absorption capacity. In this study, a novel cellulose-based SAP was developed through modified cellulose, which exhibited superior absorbency, thermal stability, pH stability, and biodegradability compared to commercial fossil-based SAPs. This indicates that Cellulo-SAP can be an effective alternative in agriculture.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Hongwei Li, Zohaib Ali, Zhongshun Yuan, Yulin Hu, Qin Wei, Chunbao Charles Xu
Summary: Agricultural waste, specifically liquefied wheat straw, was used to prepare bio-based hydroponic polyurethane (BHPU) foams. The optimized foam formula exhibited potential as a plant growth medium.
BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR
(2023)
Article
Engineering, Environmental
Ramon Filipe Beims, Amin Rizkalla, Azadeh Kermanshahi-pour, Chunbao Charles Xu
Summary: A reengineering approach is used to develop a high-strength and lightweight bio-composite material by fractionating natural wood into delignified wood (DW) and lignin, synthesizing a lignin-based epoxy resin (LER), and composting DW and LER. The newly developed wood-based composite exhibits improved hydrophobicity, antioxidation, thermal stability, and extraordinary mechanical properties surpassing many metal alloys.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Biotechnology & Applied Microbiology
Anthony Tosan Johnson, Dennise Sosa, Rosa Arredondo, Hongwei Li, Zhongshun Yuan, Chunbao (Charles) Xu
Summary: Concrete is a valuable construction material used extensively in the construction industry. Water reducers are additional chemical ingredients used to increase the workability and improve the mechanical strength and durability of concrete. This review paper discusses the types, applications, and challenges of concrete water reducers, including synthetic and bio-based variants. (c) 2023 Society of Industrial Chemistry and John Wiley & Sons Ltd.
BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR
(2023)
Article
Agricultural Engineering
Haoyu Wang, Mingyuan Zhang, Xue Han, Yimin Zeng, Chunbao Charles Xu
Summary: A continuous-flow hydrothermal liquefaction system was developed to convert various bio-feedstocks into biocrude oils. The continuous-flow reactor showed higher yields, lower molecular weights, less solid residue, and increased energy recovery rates compared to the batch reactor under the same conditions.
BIOMASS & BIOENERGY
(2023)
Article
Engineering, Environmental
Yifan Wang, Tao Yang, Long Ding, Rufei Wei, Lixin Qian, Hongming Long, Chunbao Charles Xu
Summary: The key to solving the ecological hazards caused by semi-dry sintering flue gas desulfurization ash lies in the realization of low-temperature and high-efficiency oxidation of CaSO3. Subcritical hydrothermal technology was used to oxidize CaSO3, achieving an oxidation rate of 89.83% at 180 degrees C, 2 MPa for 120 min with a solid-to-liquid ratio of 1:20. The macroscopic oxidation kinetics of CaSO3 in the subcritical hydrothermal reaction system were investigated, and a mathematical model incorporating various factors was established. The subcritical hydrothermal technology not only improves efficiency but also enables the one-step preparation of CaSO4 whiskers, facilitating cost-effective and high-value resource utilization of semi-dry FGD ash.
Article
Green & Sustainable Science & Technology
Haoyu Wang, Yipei Jiang, Evan Park, Xue Han, Yimin Zeng, Chunbao Xu
Summary: This study investigated the influence of reaction atmosphere on hydrothermal liquefaction (HTL) of pinewood sawdust. The results showed that H-2 atmosphere enhanced biomass degradation and produced the highest yield and best quality of biocrude oils. In contrast, HTL in O-2 atmosphere showed the poorest performance in terms of yields and properties. The use of KOH catalyst in H-2 atmosphere produced the highest quality of biocrude oil with the maximum yield.
Article
Engineering, Chemical
Aristide Laurel Mokale Kognou, Chonlong Chio, Janak Raj Khatiwada, Sarita Shrestha, Xuantong Chen, Hongwei Li, Yuen Zhu, Zi-Hua Jiang, Chunbao (Charles) Xu, Wensheng Qin
Summary: This study isolated various bacteria with the potential to produce glucose isomerase from soil samples, and optimized the enzyme production using response surface methodology. The isolates showed maximum enzyme activity at optimal fermentation conditions, promoting wheat straw as feedstock for the bio-based industry.
GREEN CHEMICAL ENGINEERING
(2023)
Article
Agricultural Engineering
Mingyuan Zhang, Haoyu Wang, Xue Han, Yimin Zeng, Chunbao Charles Xu
Summary: The study investigated the performance of different carbon-supported CoMoP and CoMoW catalysts in catalytic hydrodeoxygenation (HDO) of pyrolysis oil using formic acid as an in-situ hydrogen source in supercritical ethanol. Among them, the CoMoP catalyst supported on ASC-Zn and the CoMoW catalyst supported on MWNTs showed the best HDO performance, achieving higher oil yield, lower oxygen contents, and higher degree of deoxygenation (DOD) at both 300℃ and 350℃ for 2 hours. However, stability tests revealed slight deactivation of both catalysts, possibly due to leaching of active metals or coke/carbon deposition on active sites.
BIOMASS & BIOENERGY
(2023)
Review
Chemistry, Physical
Armin Rezayan, Yongsheng Zhang, Baojun Li, Chunbao Charles Xu
Summary: This review examines the potential of converting cellulose into valuable 5-hydroxymethylfurfural (HMF) for sustainable chemical production. Catalyst types, hydrolysis strategies, and reactor systems are explored for their contributions to improving cellulose-to-HMF conversion. The review also covers challenges, future perspectives, and development directions.
Article
Engineering, Environmental
Tao Shui, An Li, Michael Chae, Chunbao Charles Xu, David C. Bressler
Summary: Strict bans are in place to prevent the spread of BSE by isolating and disposing of specific risk materials (SRMs) from cattle. However, these bans result in significant costs for rendering companies and environmental burdens. This review focuses on the valorization progress achieved in the conversion of SRM-derived peptides via thermal hydrolysis, introducing potential applications in various industries.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Haoyu Wang, Xue Han, Yimin Zeng, Chunbao Charles Xu
Summary: This study developed a global kinetic model for predicting product yields from hydrothermal liquefaction (HTL) of lignocellulosic biomass based on its chemical compositions. HTL experiments were conducted with biomass model compounds and lignocellulosic biomass at various temperatures and reaction times. Lignin was found to be the main contributor to bio-oil formation. A universal reaction network and a kinetic model were proposed and validated with experimental results and literature data.
Review
Environmental Sciences
Mian Hu, Jiajia Ma, Zhuoran Jiang, Junliang Wang, Zhiyan Pan, Zhong-Ting Hu, Suqin Tang, Ramon Beims, Chunbao Xu (Charles)
Summary: Investigating ways to control the generation of deleterious gas-N species and convert them into valuable N-containing products in sewage sludge (SS) pyrolysis is crucial for SS management. This review focuses on the nitrogen migration and transformation (NMT) mechanisms during the pyrolysis process, analyzing factors such as temperature, minerals, atmosphere, and heating rate that influence NMT in char, gas, and liquid products. Strategies for N control in SS pyrolysis products are proposed for environmental and economic sustainability, with a focus on value-added liquid-N and char-N products and reducing NOx emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Physical
Wei Lin, Yi Chen, Yuexing Zhang, Yongsheng Zhang, Jianshe Wang, Liucheng Wang, Chunbao Charles Xu, Renfeng Nie
Summary: Ni-ReOx bimetallic catalysts (Ni-ReOx/TiO2) were prepared and showed high activity in the hydrogenation of furfural (FAL) to tetrahydrofurfuryl alcohol (THFOL) under mild reaction conditions. The catalyst exhibited significantly higher initial reaction rate and THFOL formation rate compared to Ni/TiO2, due to the rich Lewis acidic ReOx and the electron interaction between ReOx and Ni nanoparticles. The ReOx decoration of the catalyst decreased the activation barrier of -C=O hydrogenation and favored hydrogen spillover and C=O bond activation on Ni, leading to a synergistic effect of Ni and ReOx. The catalyst also demonstrated stability and potential for industrial application.