Article
Pharmacology & Pharmacy
Tomoya Hayashi, Fumika Nakagawa, Yoshitaka Ohno, Yusuke Suzuki, Honatsu Ishiki, Risako Onodera, Taishi Higashi, Yoshihisa Shimamura, Hiroshi Itou, Yoichiro Iwase, Hidetoshi Arima, Keiichi Motoyama
Summary: The study demonstrates that alpha- and gamma-CyD PPRX hydrogels can serve as novel vaccine formulations, significantly enhancing the immunogenicity and stability of the antigen protein while reducing local irritation.
EUROPEAN JOURNAL OF PHARMACEUTICS AND BIOPHARMACEUTICS
(2022)
Article
Polymer Science
Harry W. Gibson, Mason A. Rouser, Daniel Schoonover
Summary: A new method for synthesizing bottlebrush copolymers is introduced using crown ether-containing polyester and viologen in styrene solution, which allows for control over the structure and composition of the resulting polymers.
Article
Chemistry, Applied
Naoko Ohshita, Keiichi Motoyama, Daisuke Iohara, Fumitoshi Hirayama, Toru Taharabaru, Naoki Watabe, Youhei Kawabata, Risako Onodera, Taishi Higashi
Summary: Novel CyD/Pluronic gels have been developed as effective antibody stabilizing agents, showing remarkable stabilizing effects for human immunoglobulin G against both thermal and shaking stresses. The interaction between IgG and the free PPG block of Pluronic F108 in the gels is believed to be responsible for the strong IgG retention. These findings suggest the great potential of CyD/Pluronic gels as pharmaceutical materials for antibody formulations.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Sudeshna Kundu, Kenjirou Higashi, Makoto Takamizawa, Keisuke Ueda, Kunikazu Moribe
Summary: A new sealed-heating condition is reported to prepare the HC form of the drug/(PEG/& gamma;-CD-PPRX) complex. The guest drug in the HC form demonstrated a size-dependent stoichiometric complexation. The encapsulation efficiency of the guest drugs in the HC form complex was governed by the vapor pressure and molecular size.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Multidisciplinary Sciences
Zhen Xu, Nuwayo Eric Munyaneza, Qikun Zhang, Mengqi Sun, Carlos Posada, Paul Venturo, Nicholas A. Rorrer, Joel Miscall, Bobby G. Sumpter, Guoliang Liu
Summary: Conversion of plastic wastes to fatty acids is an attractive and economically viable method for supplementing the sourcing of high-value chemicals. Our method achieves a conversion rate of up to 80% and produces fatty acids with high molar masses. The process can be applied to municipal PE and PP wastes, and the resulting fatty acids can be further converted into high-value surfactants without the need for subsidies.
Article
Chemistry, Multidisciplinary
Mahdi Amne Elahi, Anthony Marozzi, Peter Plapper
Summary: The article focuses on the laser joining process between polypropylene and aluminum. By surface modification of aluminum and optimization of laser parameters, the mechanical properties of the assembly are improved while reducing the decomposition of polypropylene. The joined samples exhibit a maximum force of 1500 N, equivalent to a shear strength of 20 MPa.
APPLIED SCIENCES-BASEL
(2023)
Article
Polymer Science
Sandra Domenek, Francoise Berzin, Violette Ducruet, Cedric Plessis, Hom Dhakal, Emmanuel Richaud, Johnny Beaugrand
Summary: Date palm fibers are studied as a natural reinforcement in polypropylene composites, showing increased Young's modulus, but facing severe degradation during the injection molding process. Odorous compounds generated during thermal degradation of the fibers were surprisingly low during extrusion and granulation. Injection process was identified as the most critical step in the processing of date palm fibers.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Polymer Science
Piet D. Iedema, Klaas Remerie, Desiree Seegers, Kimberley B. McAuley
Summary: The study investigates the controlled reactive degradation of polypropylene (CPP) in a twin-screw extruder from the perspective of tacticity. It is found that changes in tacticity during degradation are nonrandom and influenced by isomerization reactions and chain walking. Kinetic modeling supported by NMR data confirms that tacticity changes occur locally along PP chains and within individual pentads, with chain-walking isomerization as a main cause.
Article
Chemistry, Multidisciplinary
Qianming Lin, Longyu Li, Miao Tang, Shuntaro Uenuma, Jayanta Samanta, Shangda Li, Xuanfeng Jiang, Lingyi Zou, Kohzo Ito, Chenfeng Ke
Summary: The study demonstrates a method for controlling molecular assembly structures through kinetic trapping design and amplifying them to the macroscale, achieving the capturing of transient polypseudorotaxanes from solution and obtaining materials with different physical properties. By 3D printing different shapes of polypseudorotaxane networks, moisture-responsive actuators can be constructed.
Article
Green & Sustainable Science & Technology
David O. Kazmer, Davide Masato, Leonardo Piccolo, Kyle Puleo, Joshua Krantz, Varun Venoor, Austin Colon, Justin Limkaichong, Neil Dewar, Denis Babin, Cheryl Sayer
Summary: The study compared four sustainable materials processed using a hot runner mold, finding minimal variation in mechanical properties. Reductions in mechanical properties were correlated with thermal degradation, which could be minimized by lowering melt temperature and cycle time, leading to a reduced environmental impact of injection molding processes.
Article
Polymer Science
Yankun Chen, Biao Wang
Summary: The thermal degradation behavior of polypropylene (PP) with 20 wt.% diatomite (DM) was investigated using TG-FTIR and GC-MS techniques. The addition of DM lowered the initial decomposition temperature of PP and resulted in the formation of more olefin degradation products. The catalytic effects of DM on the degradation of PP and the changes in PP chain scission pathways were observed.
Article
Polymer Science
Cristian Peptu, Alexandra-Diana Diaconu, Maricel Danu, Catalina A. Peptu, Mariana Cristea, Valeria Harabagiu
Summary: This study investigated the influence of hydroxyl group type on the polyaddition reactions of isocyanates and the structure/properties of resulting polyurethane hydrogels. By comparing native beta-cyclodextrin (CD) and its derivative esterified with oligolactide chains (CDLA), different networks were formed. The results show that the presence of primary hydroxyl groups leads to more compact networks with similar water uptake, while the predominance of secondary hydroxyl groups and the presence of oligolactide spacers allow for fine-tuning of the water swelling properties.
Article
Polymer Science
Lidziya Pryhazhayeva, Aliaksandr Shunkevich, Aliaksandr Polikarpov, Leonid Krul
Summary: The study focuses on the preparation and characterization of new carboxyl ion-exchange fibers, utilizing different factors to investigate their long-term stability. Results show that factors such as MBAA cross-linking, exposure to light, Fe(III) residue presence, and grafting reaction temperature can significantly impact the useful life of the grafted fibers.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Thermodynamics
Jun Ma, Lu He, Lei Huang, Qinghai Peng, Xufu Cai
Summary: A novel char-forming agent PETAP was successfully prepared and significantly improved the flame retardancy of PP materials, as validated by a series of experiments. The study also discussed the relationship between the microstructure of PP composites and their flame retardant properties through various analysis methods.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Rebecca E. Harmon, Gorugantu SriBala, Linda J. Broadbelt, Alan K. Burnham
Summary: A comparison of pyrolysis models for polyethylene and polypropylene suggests that mechanistic modeling could be a valuable complement to understand additional effects in polymer decomposition.
Article
Materials Science, Ceramics
Lu Fang, Xiaoli Zhang, Ji Xiang, Ming Zhao, Bin Zheng, Lei Bai
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Lei Bai, Shaojun Li, Lu Fang, Zhongping Chen, Zirong Li
Article
Materials Science, Multidisciplinary
Ting Zhang, Tangtang Zhou, Le He, Dongqing Xu, Lei Bai
Article
Chemistry, Physical
Lei Bai, Shaojun Li, Zhijie Ding, Xuchun Wang
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2020)
Article
Engineering, Chemical
Lei Bai, Zhongyue Guan, Shaojun Li, Shaoqing Zhang, Qiuxiang Huang, Zirong Li
Summary: In this study, Co3O4 and PdOx/Co3O4 nanocrystals were synthesized using HP-β-CD as an assistant, leading to improved performance in catalytic oxidation reactions. The presence of HP-β-CD resulted in higher activity and the formation of Pd (IV) species in the PdOx/Co3O4 nanocrystals, contributing to the enhanced catalytic activity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Lei Bai, Lili Ge, Junjiu Gu, Lu Fang, Shaojun Li
Summary: Zeolitic Imidazolate Framework (ZIF-8) micropolyhedra were used as raw material for the synthesis of fine CdS/ZnS composite nanoparticles, which showed excellent performance and good reusability as catalyst for the photo-reduction of Cr(VI) ions under visible light. The factors influencing catalytic activity and the reaction mechanism were investigated.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Lei Bai, Junru Zhang, Jiaxin He, Hongxing Zheng, Qiuyun Yang
Summary: The hollow ZIF-8/ZIF-67 composite was successfully prepared using zeolitic imidazolate framework (ZIF)-67 microcrystals as a precursor, which was then transformed into ZnO-Co3O4/N-C cage by thermal treatment for the oxidative degradation of bisphenol A. The enhanced catalytic performance of ZnO-Co3O4/N-C cage was attributed to the small, highly dispersed cobalt oxide particles, the hollow structure facilitating molecular transportation, and the synergistic effect between cobalt oxide and nitrogen-doped carbon in the composite.
INORGANIC CHEMISTRY
(2021)
Article
Materials Science, Ceramics
Shaojun Li, Xiaoxiao Zhang, Lei Bai, Hao Yu
Summary: In this study, zeolitic imidazole frameworks were synthesized from ZnO and Co-ZnO nanocomposites, resulting in ZnO/N-C and Co/ZnO/N-C composites which were employed as catalysts for the reduction of p-nitrophenol. The Co/ZnO/N-C composite exhibited a more efficient catalytic ability, highlighting the importance of metallic cobalt, dispersion, size, and N doping on carbon for catalytic performance.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Lei Bai
Summary: Porous Pt and PtRu nanocrystals were synthesized by a facile chemical reduction method, exhibiting enhanced catalytic activity and stability.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Lei Bai, Wanli Zong, Youjie Cheng, Jiao Wang, Lu Fang, Mengfan Wang
Summary: The study successfully synthesized Co3O4-ZnO and Co3O4-ZnO/N-C composites by first creating cobalt hydroxide-zinc oxide composites and transforming them into Co-Zn zeolitic imidazolate frameworks based on liquid/solid reaction. The mixed ZIF formed during the process achieved a much more efficient activation of persulfate for the degradation of Bisphenol A, with a 6-fold increase in degradation rate compared to Co3O4-ZnO. This improvement was attributed to the porous structure, small size of the Co3O4-ZnO/N-C, and the synergetic effect between Co3O4 and N-doped carbon.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Guiling Wang, Zihao Liu, Chenchao Ma, Zhiling Du, Dongyan Liu, Kun Cheng, Xiangju Ye, Tingting Liu, Lei Bai
Summary: In this study, novel AgMn2O4/Na0.55Mn2O4 nanosheets were successfully prepared by a liquid precipitation method. These nanosheets exhibit high specific capacity and excellent electrochemical performance, making them promising for efficient energy storage.
Article
Chemistry, Inorganic & Nuclear
Jiao Wang, Xuejie Li, Bentian Zhang, Lei Bai
Summary: By loading a small amount of cadmium acetate dihydrate on ZIF-8, a hollow CdS-ZnS-ZIF-8 composite was synthesized using rapid solid phase grinding with thioacetamide. The composite exhibited a strong visible light response and high stability for Cr(VI) reduction, thanks to its hollow structure and ultrasmall CdS nanoparticles. Additionally, the presence of ZIF-8-S greatly enhanced the stability of CdS by promoting charge separation during light irradiation.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Jiao Wang, Mengfan Wang, Bastien Leger, Anne Ponchel, Lei Bai
Summary: The NiCo2O4-ZnO-Co3O4-/N-C micro-cage was successfully synthesized by calcination of the precursor obtained from a hollow ZIF-8/ZIF-67 with nickel nitrate. The composition and structure of the composites were investigated to illustrate the preparation process involving ion exchange and leaching. The presence of NiCo2O4-Co3O4-ZnO/N-C showed more efficient degradation of BPA in the presence of persulfate, indicating a sevenfold increase in the apparent reaction rate. Further electrochemical analysis confirmed that the electron transfer was more easily achieved in the BPA-PDS-NiCo2O4-Co3O4-ZnO/N-C system. The enhanced activity of NiCo2O4-Co3O4-ZnO/N-C was attributed to its hollow structure, synergistic effect of NiCo2O4, and smaller size of the active species, which facilitated molecule and ion transport as well as PDS activation.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Lei Bai, Chun Kan, Xuejie Li, Yuanxin Zhou, Guoao Liang, Zirong Li
Summary: Heterogeneous ZnS-zinc carbonate hydroxide micro-belts were synthesized, and they exhibited significantly enhanced photocatalytic performance. The presence of ZnS promoted the separation of electrons and holes, leading to improved photo-activity and efficient light utilization.
Article
Chemistry, Multidisciplinary
Zirong Li, Zhongyue Guan, Yuting Chang, Die Hu, Baokang Jin, Lei Bai
Article
Polymer Science
Tetsu Sato, Mariko Takahashi, Takeshi Saito, Masahito Toyonaga, Itsuo Tanuma, Rie Yamada, Satoru Hosoda
Summary: An automatic evaluation system for photooxidation has been developed and successfully applied to assess the photo-OIT of LDPE samples containing photooxidation stabilizers. The system allows independent setting of various measurement conditions and provides detailed information on the photooxidation process.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Zongzheng Zuo, Shuxue Zhou
Summary: In this study, three fluoroalkyl trimethoxysilane (FATMS) additives with different chain lengths were incorporated into a two-component polyurethane clearcoat to improve its hydrophobic durability. The coatings modified with FATMS maintained their surface hydrophobicity under various conditions, but quickly lost it when exposed to both UV irradiation and/or high temperature with water. The results suggest that the FATMS route is more suitable for indoor applications at room temperature.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Song Li, Feng Zhao, Xueya Wang, Zhihua Liu, Jingze Guo, Yutong Li, Shuangmei Tan, Zhenxiang Xin, Shuai Zhao, Lin Li
Summary: Green flame retardants have garnered attention for their environmental friendliness, but current options fall short in achieving high flame retardancy for flammable polymers and maintaining environmental protection. This study takes a two-pronged approach to address flame retardants and the flame-retardant process. An eco-friendly bio-based synergistic flame retardant (PAU), synthesized using phytic acid (PA) and urea (U), is used to create a flame retardant coating that can be directly applied to any surface shape using polydopamine as an adhesive. The resulting EPS-PAU exhibits excellent flame retardancy, smoke suppression, and light weight while only slightly increasing the density.
POLYMER DEGRADATION AND STABILITY
(2024)
