Article
Polymer Science
Lifei Feng, Ran Li, Han Yang, Shanwei Chen, Wenbin Yang
Summary: A method of reinforcing and toughening unsaturated polyester resin (UPR) with a hyperbranched polyester (HBP-1) was reported. The results showed that HBP-1 enhanced the thermostability and mechanical properties of UPR.
Article
Polymer Science
Gang Huang, Linxuan Fang, Caiyun Wang, Menglu Dai, Jing Sun, Qiang Fang
Summary: A new bio-based low dielectric constant precursor with excellent thermal stability and low water absorption has been successfully synthesized. It shows a low dielectric constant and dielectric loss, making it suitable as an encapsulation resin for the microelectronic industry.
Article
Construction & Building Technology
Hongliang Zhang, Qihan Zhong, Tong Liu, Wenjiang Lv
Summary: This study proposed a waterborne unsaturated polyester resin (WUPR) pothole binder to address the drawbacks of traditional emulsified asphalt binders. Through tests and comparisons, it was found that the WUPR binder had similar mechanical properties to waterborne epoxy resin (WER) binder, but better low-temperature performance and lower cost.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Environmental
Minyan Zhang, Weihua Ye, Zhengfu Liao
Summary: A flame retardant unsaturated polyester resin (UPR) was prepared by glycolysis and esterification of recycled polyethylene terephthalate (r-PET) with propylene glycol (PG), diphenylsilanediol (DDS) and maleic anhydride (MA). The addition of aluminum hydroxide (ATH) improved the flame retardancy of UPR composites. The synergistic flame retardant mechanism between DDS and ATH was discussed based on SEM morphologies and FTIR spectra.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Biochemistry & Molecular Biology
Fengping Liu, Minghui Li, Jing Sun, Qiang Fang
Summary: In this paper, two fluorinated monomers (BCB-F and 2BCB-F) were designed and successfully prepared from biomass anethole, which were used to obtain low-k polymers with good comprehensive properties. Cured BCB-F exhibited a comparable dielectric constant and better hydrophobicity, while cured 2BCB-F showed excellent heat resistance and dielectric properties. Therefore, anethole-based polymers are suitable candidates for matrix or encapsulation resins in electronics and microelectric fields.
Article
Polymer Science
Xueliang Wu, Jing Cai, Yuanrong Cheng
Summary: This article introduces the preparation method of high-fluorine content PI with low dielectric constant and its excellent properties, including high thermal stability, low water absorption, and low dielectric constant.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Textiles
Yuanjun Liu, Yi Wang, Guang Yin
Summary: This study prepared single-layer coated polyester-cotton composites using PU-2540 waterborne polyurethane resin as the adhesive, graphite and silicon carbide as functional particles, and investigated the impact of their content and doping ratio on the reflection loss and shielding effectiveness of the materials.
TEXTILE RESEARCH JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Chao Guo, Qiuxia Peng, Hubo Wei, Jiaying Liu, Xinyu Hu, Juan Peng, Jiajun Ma, Xu Ye, Junxiao Yang
Summary: In this paper, phosphorus-oxygen flame retardant composites functionalized with benzocyclobutylene (BCB) groups were prepared and their performance were studied. The results showed that the composites with BCB groups exhibited good thermal stability and low total heat release (THR) after thermal curing, and the thermal stability and flame retardancy of cured resins improved with the increase of BCB groups on the phosphorus oxide monomers.
Article
Polymer Science
Jianhao He, Xueliang Wu, Yuanrong Cheng
Summary: A novel benzocyclobutene (BCB) and trifluoromethyl functionalized diamine monomer (BFDA) was synthesized and used to prepare a series of co-polyimides with different BCB content (PI-BFs). The dielectric constant of the cured PI-BFs decreased significantly with the increase of BCB content, and the dielectric constant of PI-BF40% could reach 2.72 at 1 MHz. BCB also contributed to improve the glass transition temperature, initial storage modulus, and thermo-size stability of PI-BFs. Moreover, PI-BFs exhibited excellent thermal stability, good transparency, and low water uptake.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Chemistry, Physical
Jinjian Zhu, Xiaojun Wang, Minzhuang Chen
Summary: Dual-initiation is a new approach in the curing of unsaturated polyester resin and the manufacture of low-density unsaturated polyester resin composite materials. By using different combinations of initiators, dual-initiators can release more active free radicals, accelerating the curing process and improving the cross-linking of the resin. This results in enhanced specific compressive strength of the composite materials.
Article
Chemistry, Physical
Jian Zhang, Xiaojun Wang, Xinjun Fu
Summary: Chopped carbon fiber-reinforced low-density unsaturated polyester resin (CCFR-LDUPR) composites with light weight and high mechanical properties were prepared at low temperature with the synergistic action of methyl ethyl ketone peroxide (MEKP-II) and cobalt naphthenate. Optimal preparation conditions were obtained through an orthogonal experiment.
Article
Polymer Science
Xue Huang, Yan-ting Guo, Xu-ming Yan, Guo-qiang Yin, Guang-zhu Feng
Summary: By studying the structure, mechanical properties, and water resistance of E-SiO2/DFA/UPR materials, it was found that E-SiO2 has a good reinforcing and toughening effect on the materials, and can improve the thermal properties and water resistance of the materials.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Physics, Condensed Matter
Hadia Noor, Muhammad Waqas Hanif, Sobia Latif, Zubair Ahmad, Saira Riaz, Shahzad Naseem
Summary: A series of nanocomposites were synthesized by dispersing iron oxide nanoparticles in unsaturated polyester resins at different weight percentages, showing amorphous nature confirmed by X-ray diffraction and random dispersion of nanofillers in polymer matrix observed by scanning electron microscopy. The conductivity and magnetic parameters of the nanocomposites were enhanced with increasing concentration of nanoparticles.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Polymer Science
Zhandos Tauanov, Olzhas Zakiruly, Zhuldyz Baimenova, Alzhan Baimenov, Nuraly S. Akimbekov, Dmitriy Berillo
Summary: This study focuses on the synthesis of polymer composites with antimicrobial properties for sanitary applications. The results show that the composite has a non-porous structure and effectively inhibits the growth of bacteria.
Article
Construction & Building Technology
K. Ulutas, S. Yakut, D. Bozoglu, B. D. Sitilbay, M. Karasahin, S. Yardim, D. Deger
Summary: The bitumen was modified with unsaturated polyester resin and the properties of the modified bitumen were compared with the unmodified bitumen. The modified bitumen showed a lower glass transition temperature, making it suitable for regions with large temperature differences. The dielectric analysis method was found to be an effective alternative for evaluating the low-temperature performance of modified bitumen.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Polymer Science
Meghan E. Lamm, Kai Li, Jerald Atchley, Som S. Shrestha, Shannon M. Mahurin, Diana Hun, Tolga Aytug
Summary: This study reports a simple and commercially viable strategy to produce thermoplastic composite foams for thermal insulation applications. By incorporating porous-shell hollow-interior glass spheres (PHGS) as a filler and utilizing expandable thermoplastic microspheres (EMS) as a physical blowing agent, the resulting foams demonstrate both low thermal conductivity and lightweight mechanical reinforcement. The optimized foam formulation achieved a lightweight and robust insulation material with thermal resistivity greater than 27.7 m center dot K/W (R/in. > 4), comparable to some commercial thermoplastic insulating materials.
Article
Polymer Science
Manling Shi, Gang Huang, Jing Sun, Qiang Fang
Summary: Two low-k polymers with good hydrophobicity and excellent dielectric properties have been synthesized via the Grubbs reaction from bio-based isoeugenol and anethole. The results demonstrate that incorporating trifluoromethyl-containing aromatic rings into the polymer greatly enhances its dielectric properties, making the fluorinated bio-based polymer suitable for 5G communication devices.
Article
Chemistry, Multidisciplinary
Caihong Gong, Zhao Liu, Zhengxin Tao, Anding Xu, Haijiao Xie, Qiang Fang, Zhiming Qiu, Yurong Yan
Summary: This study successfully synthesized a series of daidzein-based sustainable polyimides with a high bio-based content of up to 53%, which was significantly higher than the reported bio-based content of approximately 40%. The mechanical and thermal stability of the obtained polymer is comparable with that of commercial polyimides, and it also exhibits excellent fluorescence characteristics. The integration of experiments and density functional theoretical calculations revealed the molecular characteristics and inhibition effect of charge transfer in daidzein-based polyimides.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Michael L. Whittaker, Wenming Dong, Kai Li, Tolga Aytug, Sam F. Evans, Harry M. Meyer III, Bruce A. Moyer, Mariappan Parans Paranthaman
Summary: Iron doping enhances selective sorption of lithium in lithium-aluminum layered double hydroxides (LDHs), influencing the composition and properties of LDHs. The presence of iron leads to the formation of different particle types that affect lithium capacity and cyclability in LDHs. Optimized cycling efficiency and stability of lithium sorption can be achieved under specific iron redox conditions.
CHEMISTRY OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xianhui Zhao, Samarthya Bhagia, Diego Gomez-Maldonado, Xiaomin Tang, Sanjita Wasti, Shun Lu, Shuyang Zhang, Mahesh Parit, Mitchell L. Rencheck, Matthew Korey, Huixin Jiang, Jiadeng Zhu, Xianzhi Meng, Meghan E. Lamm, Katie Copenhaver, Maria S. Peresin, Lu Wang, Halil Tekinalp, Guang Yang, Vipin Kumar, Gang Chen, Kashif Nawaz, X. Chelsea Chen, Uday Vaidya, Arthur J. Ragauskas, Erin Webb, Douglas J. Gardner, Ping He, Ximin He, Kai Li, Soydan Ozcan
Summary: This article reviews the recent development and applications of bioinspired nanocellulose-based materials, summarizes their functions and applications, discusses bioinspired design templates, strategies, advantages and challenges, and explores the mechanisms and processes of biomimetic design. Finally, future research directions and opportunities of bioinspired nanocellulose-based materials are highlighted.
Review
Materials Science, Multidisciplinary
Christine Fisher, Lydia N. Skolrood, Kai Li, Pooran C. Joshi, Tolga Aytug
Summary: Aerosol-jet printing (AJP) is an emergent direct-write approach used for rapid and affordable manufacturing of microadditive energy-efficient sensors and printed electronics. AJP can print diverse materials with a wide range of ink viscosities (0.001-1 Pa s) including ceramics, metals, polymers, and biological matter. It enables the conformal printing of complex geometrical designs on nonplanar surfaces with high spatial resolution features (approximately 10 μm) and wide standoff distances (1-11 mm) between the nozzle and substrate.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Yuanhao Feng, Jing Sun, Qiang Fang
Summary: Two fluoro-containing monomers were synthesized from bio-based eugenol and estragole and copolymerized with commercial bismaleimide to give a series of BMI polymers. The BMI polymer incorporated with one of the monomers exhibited low dielectric content, good hydrophobicity, and excellent thermostability, surpassing those of the commonly used allyl-modified maleimide resins. This study provides a method to enhance the properties of BMI through the utilization of biomass modifiers for high-frequency technology.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Fengping Liu, Minghui Li, Jing Sun, Qiang Fang
Summary: In this paper, two fluorinated monomers (BCB-F and 2BCB-F) were designed and successfully prepared from biomass anethole, which were used to obtain low-k polymers with good comprehensive properties. Cured BCB-F exhibited a comparable dielectric constant and better hydrophobicity, while cured 2BCB-F showed excellent heat resistance and dielectric properties. Therefore, anethole-based polymers are suitable candidates for matrix or encapsulation resins in electronics and microelectric fields.
Article
Energy & Fuels
Mingkan Zhang, Cheng-Min Yang, Kai Li, Kashif Nawaz
Summary: In this study, an advanced maldistribution reduction manifold is designed to improve the flow distribution in heat exchangers. The design includes the use of spiral baffles and keeping the tubes away from the manifold inlet. Simulation results show significant improvement in flow distribution compared to the preliminary design.
Article
Polymer Science
Gang Huang, Rongrui Shi, Jing Sun, Qiang Fang
Summary: By using the Grubbs reaction, two fluorinated precursors (M1 and M2) containing thermo-crosslinkable benzo-cyclobutene (BCB) groups and an unconjugated double bond were successfully synthesized. The cured products of these precursors exhibited low Dk and Df at 10 GHz frequency, as well as excellent hydrophobicity even after being immersed in boiling water for 72 hours. Among the cured resins, M1 showed the best overall performance with a Dk of 2.41, a Df of 1.02 x 10-3, and a water uptake of 0.013%. A control precursor M3 without the unconjugated double bond was also prepared, and it was found that the unconjugated double bond positively affected the dielectric and mechanical properties of the resins. Further investigation revealed that cured M1 had lower density compared to cured M3. This research provides insights into the design of low-k materials and offers a facile method for their preparation.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Kai Li, Tyler Smith, William Asher, Alexis Flores-Betancourt, Artem A. Trofimov, Hsin Wang, Mingkan Zhang, Logan Kearney, Edgar Lara-Curzio, Soydan Ozcan, Vlastimil Kunc, Amit K. Naskar, Kashif Nawaz
Summary: The study finds that PETG composites produced through 3D printing have anisotropic thermal conductivity and low CTE at room temperature, making them potentially suitable for heat exchanger applications at low temperatures.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Polymer Science
Jiaren Hou, Jing Sun, Qiang Fang
Summary: Two new oxygen-free polymers (p-4F-BVS and p-6F-BVS) with excellent dielectric performance at 10 GHz frequency and low thermal expansion coefficient have been synthesized through thermal crosslinking reaction. The introduction of bulky -CF3 groups reduces the dielectric constant, while the absence of oxygen atoms decreases the dielectric loss. These polymers are highly desirable for advanced packaging materials in the microelectronics industry.
Review
Materials Science, Multidisciplinary
Lu Wang, Peter V. Kelly, Nihan Ozveren, Xuefeng Zhang, Matthew Korey, Cong Chen, Kai Li, Sunil Bhandari, Halil Tekinalp, Xianhui Zhao, Jinwu Wang, M. Ozgur Seydibeyoglu, Elif Alyamac-Seydibeyoglu, William M. Gramlich, Mehdi Tajvidi, Erin Webb, Soydan Ozcan, Douglas J. Gardner
Summary: This review paper explores the multi-functional applications of cellulose nanomaterials (CNMs) in polymer coatings and adhesives. CNMs can enhance mechanical performance, gas barrier properties, flame resistance, corrosion resistance, self-healing, optical regulation, self-cleaning/antifouling, and antimicrobial characteristics of polymer coatings. The addition of CNMs to polymer adhesives offers benefits such as mechanical enhancement, curing promotion, volatile organic compound (VOC) suppression, and electrical conductivity. The paper aims to promote the research and commercial use of CNMs in green and sustainable polymer composite coating and adhesive formulations.
Article
Green & Sustainable Science & Technology
M. Dai, J. Sun, Q. Fang
Summary: A new monomer (M1) and a control monomer (M2) have been obtained from a bio-based resveratrol, showing excellent heat resistance and dielectric properties after thermal curing. In contrast, the polymers containing oxygen atoms derived from resveratrol (cured M3 and cured M4) exhibit increased dielectric properties and lowered thermostability.
MATERIALS TODAY SUSTAINABILITY
(2023)
