Article
Materials Science, Multidisciplinary
Yuma Ueno, Hayato Nakazaki, Hina Onozaki, Shingo Tamesue
Summary: Researchers developed a growable adhesive gel system using RAFT polymerization, which can change its characteristics similar to human growth. The adhesive joint grown by RAFT polymerization showed higher adhesive strength and a function of thermal responsiveness compared to non-RAFT-polymerized adhesive joint. These growable adhesive gel systems enable long-term use of gel materials while adapting to environmental changes.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Zhiying Li, Qianjin Lian, Youwei Xu, Yichuan Zhang, Pengfei Zhang, Jin Geng
Summary: A robust aggregation-induced emission luminogen photoaddition-fragmentation chain transfer (PET-RAFT) polymerization was investigated, resulting in the preparation of a variety of well-defined polymers with narrow polydispersities (D < 1.20). The use of low concentrations of a donor-acceptor (D-A) type aggregation-induced emission luminogen as a photocatalyst enabled polymerization under visible light at ambient temperature. Previous studies have mainly focused on organic solvents, with fewer investigations conducted in aqueous environments. This study successfully demonstrated the polymerization strategy in water with or without oxygen, leading to the synthesis of structure-controlled polymers. Furthermore, the fluorescence intensity of DCDPP-2TPA increased linearly with the degree of polymerization.
Article
Polymer Science
Mahtab Hamrahjoo, Saeed Hadad, Elham Dehghani, Mehdi Salami-Kalajahi, Hossein Roghani-Mamaqani
Summary: A nanocomposite polymer electrolyte with optimized structural design and morphology of polymer-functionalized graphene oxide was successfully prepared. It exhibited high ionic conductivity, superior lithium ion transfer capability, and excellent electrochemical stability, making it a promising candidate for high safety and long cycle life lithium-ion batteries.
EUROPEAN POLYMER JOURNAL
(2022)
Review
Chemistry, Multidisciplinary
Ruoyu Li, Weina Kong, Zesheng An
Summary: This Minireview discusses the key roles enzymes play in reversible deactivation radical polymerization (Enz-RDRP) and highlights their applications in surface brush fabrication, sensing, polymerization-induced self-assembly, and high-throughput synthesis. The authors also reflect on the challenges and future directions of this emerging area.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Nanoscience & Nanotechnology
Yang Zhang, Qi Zhan, Changrui Wang, Jie Gao, Guofu Zhou, Wei Zhao, Jiawen Chen
Summary: By utilizing reversible addition-fragmentation chain transfer (RAFT) polymerization reactions, the polymer network structure in polymer-stabilized liquid crystals (PSLCs) can be regulated, resulting in increased elasticity and durability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Pinar Akarsu, Stefan Reinicke, Anne-Catherine Lehnen, Marek Bekir, Alexander Boeker, Matthias Hartlieb, Martin Reifarth
Summary: The study demonstrates a feasible method to fabricate patchy silicon dioxide microspheres, which can be equipped with tailor-made polymeric materials as patches. The method relies on a solid-state supported microcontact printing (μCP) routine optimized for the transfer of functional groups to capillary-active substrates, introducing amino functionalities as patches to a monolayer of particles. Acting as anchor groups for polymerization, photo-iniferter reversible addition-fragmentation chain-transfer (RAFT) is used to graft polymer from the patch areas. The protocol promises a vast degree of freedom in engineering the surface properties of highly functional patchy particles, making it a platform technology for the fabrication of particles with locally precisely formed patches.
Article
Green & Sustainable Science & Technology
Xiuxian Zhao, Junhua Sun, Jiachen Ma, Tongyao Liu, Zeyi Guo, Zhen Yang, Wei Yao, Xuchuan Jiang
Summary: Vanadium dioxide (VO2) is considered as a promising material for smart windows. However, its real application is hindered by several limitations. In this study, core-shell structured VO2@PMMA-b-PHFBMA nanoparticles with excellent properties were prepared using a RAFT polymerization method. The addition of a F-containing polymer shell improved the stability and compatibility of the VO2 nanoparticles. Furthermore, a photochromic and hydrophobic copolymer was synthesized and coated onto the VO2 nanoparticles to create an energy-saving composite film. The composite film showed high solar modulation efficiency, making it a highly promising application for smart windows.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2022)
Article
Polymer Science
Patrizia P. Smith, Stephen G. Boyes
Summary: Amphiphilic block copolymers were successfully synthesized using a dual initiator chain transfer agent. Comprehensive kinetics studies provided valuable insights into factors influencing the synthesis of well-defined block copolymers, as well as the ability to produce poly(lactide) blocks of different molecular weights. The role of the chain transfer agent in facilitating the complex and sterically demanding RAFT polymerization of PEGEEMA was also examined through kinetics monitoring.
JOURNAL OF POLYMER SCIENCE
(2021)
Review
Polymer Science
Mineto Uchiyama, Kotaro Satoh, Masami Kamigaito
Summary: Since the first report of cationic reversible addition-fragmentation chain transfer (RAFT) polymerization in 2015, significant progress has been made in various aspects of cationic RAFT and degenerative chain transfer (DT) polymerizations. This review focuses on the similarities and differences between cationic and radical RAFT polymerizations, discussing the characteristics and expanding potentials of cationic RAFT and DT polymerizations.
PROGRESS IN POLYMER SCIENCE
(2022)
Article
Polymer Science
Sofia L. Goodrich, Madison E. Ross, James B. Young, Brent S. Sumerlin
Summary: In this study, sonochemically initiated reversible addition-fragmentation chain transfer polymerization was achieved by employing low-frequency ultrasound at high monomer concentrations. Dilution with N,N-dimethylacetamide was found to increase the conversion rate.
Article
Chemistry, Multidisciplinary
Joji Tanaka, Noel Edward Archer, Michael Jeffery Grant, Wei You
Summary: In this study, RAFT step-growth polymerization was achieved by combining RAFT and step-growth polymerization mechanisms, resulting in backbone repeat units with a pendant RAFT agent that can form molecular brush polymers in a second polymerization step. The cleavable backbone functionality allows the transformation of brushlike polymers into linear chains of uniform size under stimuli.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Kyeong Min Kim, Masud, Jung-Min Ji, Hwan Kyu Kim
Summary: By varying the composition and molecular weight of the copolymers, the performance of polymer gel electrolytes (PGEs) in quasi-solid-state dye-sensitized solar cells can be improved, with higher molecular weight enhancing ionic conductivity in the PGEs.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Bin Wu, Qian-Jun Ding, Zheng-Lin Wang, Rong Zhu
Summary: Here, we present a strategy inspired by stereoelectronic effect, employing simple vinylidenecyclopropanes (VDCPs) as butatriene homologues in controlled radical ring-opening polymerizations, achieving controlled synthesis of alkyne polymers. VDCPs mimic butatrienes through the conjugation of the cyclopropane ring, leading to highly ordered alkyne-based backbone with complete ring-opening and no backbiting.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Polymer Science
Arne Wolpers, Florian Baffie, Vincent Monteil, Franck D'Agosto
Summary: In this study, a dithiocarbamate chain transfer agent was used to synthesize statistical and diblock copolymers of ethylene and vinyl acetate, achieving various polymer compositions through good chain growth control, including linear diblock copolymers and a three-arm star copolymer.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Polymer Science
Kazunori Masuko, Chiharu Kumano, Ryo Sugawara, Kazuhiro Nakabayashi, Hideharu Mori
Summary: A variety of amino-acid-based amphiphilic diblock copolymer nano-objects with different morphologies were prepared through RAFT dispersion polymerization of styrene in methanol, utilizing six different hydrophilic poly(N-acryloyl amino acid) macro-chain transfer agents. The effects of polymerization conditions, monomer conversion, and concentration were systematically studied to achieve the formation of nano-objects with various morphologies. By transforming the products from methanol to water, pH-responsive morphological changes were observed in the aqueous solution.
JOURNAL OF POLYMER SCIENCE
(2021)
Article
Environmental Sciences
Ying Wang, Huanyan Luo, He Peng, Xitong Wang, Fei Xu, Heng Xu
Summary: The characteristics and resistant mechanisms of macro-fungus endophytic bacteria to cadmium were explored in this study. It was found that under cadmium stress, the morphology of the bacteria changed to reduce the threat of cadmium. Functional groups like -OH, -COOH, and -NH2 were found to play a role in the cadmium adsorption process. Additionally, the adsorption of cadmium in the sterilized strains was higher compared to the living ones.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Materials Science, Ceramics
Peng He, Meng-Jiao Zheng, Qi Liu, Zi-Yi Liu, Ru-Zhong Zuo, Wen-Qiang Cao, Jie Yuan, Mao-Sheng Cao
Summary: MXenes are highly sought-after for their exceptional electrical conductivity, mechanical stability, and other properties, making them the leading materials for EM wave absorption. The crystal and electronic structures of MXene hybrids, as well as their EM functions, are systematically arranged and their relationship revealed. Major challenges and future directions in this rapidly expanding field are proposed.
CERAMICS INTERNATIONAL
(2022)
Article
Environmental Sciences
He Peng, Yizhong Chen, Jing Li, Jingzhao Lu
Summary: An energy information flow-based ecological risk assessment framework was developed to identify ecological risk transmission rules among different communities within contaminated soil systems, showing that soil microorganisms E3 are the most sensitive community when contaminant interference occurs.
Article
Environmental Sciences
Bohan Wu, Huanyan Luo, Xitong Wang, Huakang Liu, He Peng, Mingping Sheng, Fei Xu, Heng Xu
Summary: This study investigated the ecological effects of environmental factors on bacterial communities around pyrite mine tailings. The results showed that most samples were contaminated by multiple metals, with soil pH, bacteria abundance, and diversity increasing with the distance from the tailings. Various factors such as invertase, acid phosphatase, total organic carbon, pH, and specific metals were found to influence the bacterial community composition.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Green & Sustainable Science & Technology
Lingzhi Yang, Yizhong Chen, Hongwei Lu, Youfeng Qiao, He Peng, Pengming He, Yunshuo Zhao
Summary: This study integrates various models to analyze the historical and future evolution, spatial-temporal collaborative relation, and input-output efficiency of water ecological carrying capacity (WECC) in the Beijing-Tianjin-Hebei (BTH) and Yangtze River Economic Zone (YREZ). The results show that WECC level is generally increasing in both regions, with different preferences for monitoring water resources and socio-economic subsystems. The combination prediction model has lower error and the binary matching degrees are above medium state. The findings suggest the need for improving regional WECC and rational planning of water resources.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Thermodynamics
He Peng, Guo Xiangji
Summary: The development of the Ranque-Hilsch vortex tube has been stagnant since the 1950s, and its performance has remained constant for 70 years. The lack of a mature design method and unclear flow structure and energy separation mechanism have limited its widespread industrial adoption. This study investigates the relationship between cooling performance and the area ratio of a vortex tube and suggests that the inlet mass flowrate per unit area can be a geometric performance benchmark.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Environmental Studies
He Peng, Chunjiang An, Kelvin Tsun Wai Ng, Jianli Hao, Xuelin Tian
Summary: Promoting cleaner municipal solid waste transportation processes is crucial for sustainable waste management. A regional cap-and-trade system was developed and applied to waste disposal in Montreal, Canada, using different alternative energy scenarios. The results showed that the electric fleet outperformed the diesel fleet in terms of both cost savings and emission reductions.
TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT
(2023)
Article
Engineering, Civil
Chen Guanyi, He Peng, Wangliang Bi, Xiao Jie, Wangyang Chen, Chengcheng Zheng
Summary: This paper studies the stability of shield tunnel excavation surface and its influencing factors through field investigations and tests, and deduces equations for solving the limit support pressure and safety factor of the excavation surface. The single reduction method and the double reduction method are used to solve the safety factor under basic working conditions, and a numerical simulation method is clarified. Based on FLAC3D software, the stability of the excavation face is evaluated using the ultimate support pressure and safety factor, and the response of factors such as internal friction angle, cohesion, and hole diameter are analyzed. The internal friction angle has the greatest impact on the stability of the excavation surface.
TRANSPORTATION RESEARCH RECORD
(2023)
Article
Chemistry, Physical
Xiaolei Ai, Yuehui Dang, Xianquan Jiang, Xiaowei Feng, Ruihao Zhang, Yuhe Tian, Jiangyang Yu, He Peng, Rui Hong, Bo Feng, Kaihong Zheng, Fusheng Pan
Summary: Ti particles addition in Mg AZ31/Al 6082 composite sheets prepared by hot rolling was investigated in this study to understand the influence on mechanical behavior and microstructure. The results revealed that Ti particles were uniformly distributed at the interface, leading to a reduction in Mg-Al intermetallic compounds during annealing treatment. After annealing, the Mg/Al-Ti sheet exhibited improved tensile strength and elongation compared to the Mg/Al sheet. Ti particles addition had minimal effect on the grain size, texture type, and tensile fracture morphology of the Mg and Al layers in the composite sheets. This study provides a new perspective on understanding Mg/Al composites through the addition of metal particles.
Article
Nanoscience & Nanotechnology
Xia Wang, Dexu Geng, He Peng, Lizhong Zhang
Summary: A new type of pneumatic flexible arm is developed to address the weak driving ability and low torsional stiffness issues. The arm utilizes three fan-shaped driving cavities and a convex-concave nested constraint ring structure. Static experiments were conducted to verify the theoretical model, which showed consistent results. By adjusting the pressure of the driving cavities, the flexible arm can bend in any direction within a 0°-360° range and at any angle within a 0°-98° range. It overcomes the limitations of weak driving ability and anti-torsion ability, providing flexibility for various applications in service, medical treatment, and rescue fields.
Article
Chemistry, Multidisciplinary
He Peng, Wenxing Ma, Zhongshan Wang, Zhe Yuan
Summary: In order to address the challenges of auto-leveling the body of a hillside tractor under complex working conditions, a new auto-leveling control system was developed based on a newly developed hillside tractor and four-point body leveling mechanism. The system utilizes a sliding mode variable structure control algorithm with fuzzy switching gain adjustment for improved leveling accuracy and stability. Simulation and testing results show that the system achieves good leveling effects in hilly and mountainous areas, demonstrating its high leveling accuracy and dynamic stability.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Peng He, Qing-qing Zhou, Xiao-Yu Zhao, Hao Wang, Yang Hu, Waqar Younas, Guo-Bing Mao, Feng Tao, Xie-Yang Qian, Feng Wang, Zi-Yi Liu, Meng-Jiao Zheng, Qi Liu, Wen-Qiang Cao, Zhi-Ling Hou, Jie Yuan, Mao-Sheng Cao
Summary: Research on MXene-based electromagnetic (EM) protection materials has been ongoing for 7 years since 2016, making MXene-based EM protection materials a leading material in the field. Recent developments have also led to multifunctional applications of MXene-based EM protection materials. This review systematically summarizes the development trends in MXene-based EM protection materials and focuses on the main line of development, as well as different mechanisms for EMI shielding materials and EM wave absorbing materials. Additionally, it elaborates on other functional applications of MXene-based EM protection materials. The challenges and opportunities in the development of MXene for multifunctional EM protection are also discussed.
Article
Peripheral Vascular Disease
Xiaoxiang Ma, Yue Zhuo, Yu Huang, Pengming He, Zhaoyi Huang, Li Jiang, Luyao Tong, Xiaoqin Yao, Xueping Wen, Xuemei Zhong, Shihan Yang, Changqiong Li, Yuping Liu, Zhixin Zhang
Summary: This study reveals that abnormal T-cell responses may play important roles in the progression of essential hypertension and its subclinical target organ damage. The TCR beta repertoires of patients with essential hypertension are significantly different, and are correlated with carotid plaque formation.
Article
Environmental Studies
Xuelin Tian, E. Owen D. Waygood, Chunjiang An, Zhikun Chen, He Peng
Summary: This study proposes an innovative framework for analyzing the effectiveness and emission reduction potential of electrifying transit policies. The future energy consumption, GHG emissions, and pollutant emissions of bus fleets in representative Canadian cities were analyzed. Compared to the BAU scenarios, the cumulative GHG emissions from 2019 to 2030 of bus fleets in Toronto, Montreal, Edmonton, and Halifax had a reduction of 18.7%, 30.1%, 21.3%, and 34.6%, respectively.
TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT
(2023)
Article
Soil Science
Bin Wu, Jia Li, Mingping Sheng, He Peng, Dinghua Peng, Heng Xu
Summary: In this study, the application of biochar and oyster shell was found to reduce the accumulation of cadmium in crops and improve soil quality. The addition of biochar and oyster shell decreased the HOAc-extractable Cd in soil and reduced Cd accumulation in brown rice and oilseed, while increasing soil organic matter and available phosphorus. Furthermore, the cooperative application of biochar and oyster shell enhanced enzyme activities in the soil.
