Article
Chemistry, Physical
Xueting Lian, Jin Gao, Feifei Guo, Ang Qian, Xiaogang Li
Summary: The Sol-gel method was used to prepare a Si-Ti-epoxy organic-inorganic hybrid composite sol, which was cured on the carbon steel surface to form a transparent film with excellent electrochemical protection performance and hydrophobicity. The Si-Ti-epoxy hybrid film has a denser structure, higher impedance modulus, and lower corrosion current density compared to a double-thick epoxy film.
SURFACES AND INTERFACES
(2021)
Article
Construction & Building Technology
Barbara Ferreira, Sara Sousa, Rui P. C. L. Sousa, Susana P. G. Costa, M. Manuela M. Raposo, Pier Parpot, Artur J. M. Valente, Rui F. P. Pereira, Rita B. Figueira
Summary: This work reports the synthesis of organic-inorganic hybrid membranes for potential optical fibre sensors for pH monitoring of concrete and reinforced concrete structures. The membranes were successfully obtained and showed promising results in simulated concrete pore solutions.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Rui P. C. L. Sousa, Rita B. Figueira, Emanuela Callone, Sandra Dire, Susana P. G. Costa, Maria Manuela M. Raposo
Summary: In this study, four novel organic-inorganic hybrid materials were synthesized using the sol-gel method. The materials were based on different molecular weights of Jeffamines and ECHETMS, and characterized using various techniques. The influence of Jeffamine molecular weight on the suitability of these materials as a supporting matrix for heteroaromatic probes was assessed and discussed, and the materials were found to exhibit interesting properties for a wide range of sensing applications.
Article
Polymer Science
Adrian Borquez-Mendivil, Abel Hurtado-Macias, Jesus Eduardo Leal-Perez, Joaquin Flores-Valenzuela, Ramon Alvaro Vargas-Ortiz, Francisca Guadalupe Cabrera-Covarrubias, Jorge Luis Almaral-Sanchez
Summary: Hybrid coatings of SiO2 and recycled unsaturated polyester resin (R-UPR) were prepared by the sol-gel process on glass substrates. The results showed that SiO2 enhanced the mechanical and thermal properties of the R-UPR, and the coatings exhibited excellent adhesion to the substrate with a smooth surface.
Article
Materials Science, Multidisciplinary
Galtiere Correa Rego, Rafael Marinho Bandeira, Julia van Drunen, Germano Tremiliosi-Filho, Luiz Carlos Casteletti
Summary: Sol-gel technology was employed in this study to produce organic-inorganic hybrid coatings on AISI 1045 carbon steel for corrosion protection. The coatings were prepared using tetraethylorthosilicate (TEOS) and 3-(trimethoxysilyl)propyl methacrylate precursors. Thermal treatment of the coatings resulted in decreased thickness and improved scratch resistance. Electrochemical measurements showed that the coatings treated at 100 degrees C exhibited higher polarization resistance and less aggressive corrosion compared to higher temperature treatments.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Linken Ji, Yaqing Zhang, Xiangping Li, Tiantian Jiao, Ruochen Zhang, Peng Liang, Xiaolong Dong
Summary: In this study, a phenolic resin and ammonium alginate composite derived carbon was prepared and showed an interconnected coral-like carbon structure and high specific surface area. The carbon material exhibited excellent ion diffusion channels and continuous conductive network, leading to high specific capacitances, energy density, and cycling stability in supercapacitors.
JOURNAL OF POWER SOURCES
(2023)
Article
Forestry
Hongxing Wang, Yinliang Zhang, Huijie Li, Haojie Hou, Chunfeng Li, Mingli Liu
Summary: Organic-inorganic composite modifiers were used to modify wood in this study, and it was found that when the average particle size of silica sol is 8-15 nm, pressure is 1.2 MPa, and pressurization time is 3 hours, the impact toughness of the modified poplar wood reaches its optimum, improving by 84.1% and 135.4% compared to raw material and phenolic resin impregnated wood, respectively. Chemical reactions between impregnation liquid and wood were confirmed to enhance thermal stability and toughness through FT-IR, XPS, DMA, and TGA analyses, making the impregnated material superior to the original poplar. SEM analysis showed successful penetration and filling of poplar cells by the composite impregnation liquid.
Article
Chemistry, Multidisciplinary
Mengyuan Wang, Shizhuo Su, Xin Zhong, Derui Kong, Bo Li, Yujie Song, Chunman Jia, Yifan Chen
Summary: A novel redox-active organic-inorganic hybrid material based on tetrathiafulvalene derivatives and titanium dioxide has been synthesized, demonstrating remarkably enhanced photocatalytic performance. Characterizations of the hybrid reveal advantages such as stability and separation of photogenerated charges.
Article
Nanoscience & Nanotechnology
Yoshiki Shirai, Ayano Sasaki, Sayako Sato, Daisuke Aoki, Koji Arimitsu
Summary: Organic-inorganic materials have advantages of both organic and inorganic resins, yet hard coating films made of organic-inorganic mixtures of resins suffer from opacity and interface peeling problems. In this study, we successfully fabricated an organic-inorganic gradient film by impeding the movement of organic and inorganic resins and enhanced the gouge hardness by sol-gel reactions of inorganic resins. The resulting organic-inorganic gradient coating exhibited excellent gouge hardness, adhesion to organic substrates, and transparency.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Applied
Alvaro G. Braz, Sandra H. Pulcinelli, Celso Santilli
Summary: This study investigates the use of glycerol as a crosslinker for polyurethane, which is hybridized with a silica network. The results show that this organic-inorganic hybrid coating can effectively enhance the corrosion resistance of metal alloys.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Applied
Alvaro G. Braz, Sandra H. Pulcinelli, Celso V. Santilli
Summary: This study investigates glycerol as a crosslinker for polyurethane segments hybridized with a silica network for protective coatings. Evaluations were made on the structure, thermal stability, and corrosion protection of the coatings at different APTES/4,4'-MDI molar ratios, confirming the suitability of the PU-silica hybrid for anticorrosive thin coatings to protect metal alloys against corrosion.
PROGRESS IN ORGANIC COATINGS
(2022)
Review
Chemistry, Physical
Andrea Erigoni, Urbano Diaz
Summary: Organic-inorganic hybrid catalysts, especially those based on silica, have been extensively researched due to their combination of structural stability and versatility. This review focuses on the synthetic tools and chemistry behind the sol-gel syntheses of hybrid catalysts, as well as exemplificative studies on mono- and multi-functional silica-based catalysts with different active sites. Materials obtained through various approaches are compared in terms of properties and catalytic performances, aiming to provide useful information for researchers in the field.
Article
Chemistry, Multidisciplinary
Sacha Legrand, Rakib Kabir, Ari Karkkainen
Summary: A series of novel polysiloxanes derived from phenanthrenyl-containing monomers were prepared using sol-gel technology and free-radical polymerization. These polysiloxanes exhibit high refractive index, thermal stability, and resistance against aging, making them suitable for optoelectronic applications. The effects of crosslinking agent and chain packing density on the chemical, optical, and mechanical properties of the polysiloxanes and corresponding films were studied.
Article
Materials Science, Ceramics
Hiroyuki Hayashi, Keita Kouzai, Yuta Morimitsu, Isao Tanaka
Summary: Despite extensive research, accurately predicting successful synthesis conditions for new pseudo-binary oxides remains a challenge. This study introduces a synthesis-condition recommender system to efficiently explore a wide chemistry space and successfully discovered two yet-to-be-found pseudo-binary oxides through systematic synthesis experiments.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
E. Zanchetta, G. Della Giustina, A. Gandin, V Auzelyte, G. Brusatin
Summary: Direct printing of spin-on functional films is an efficient method to develop low-cost photonic nanodevices. In this study, high refractive index TiO2 micro- and nano-structures were obtained by combining thermal nanoimprint lithography with UV curing. The patterns were achieved by depositing a hybrid organic-inorganic spin-on film using sol-gel processing. The further UV irradiation converted the imprinted films to totally inorganic patterns, allowing high refractive indexes to be achieved. This novel strategy allows inorganic deep patterns to be fabricated without a calcination step.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Takehiro Kawauchi, Takahiro Kojima, Hiroshi Sakaguchi, Tomokazu Iyoda
Article
Polymer Science
Takehiro Kawauchi, Tsubasa Osawa, Shunichiro Matsumura, Takuto Mori, Nobuyuki Furukawa, Kazunori Ishikawa, Koju Iwasaki, Tsutomu Takeichi
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2019)
Article
Chemistry, Physical
Mengdi Liu, Takehiro Kawauchi, Tomokazu Iyoda, Piotr Piotrowiak
JOURNAL OF PHYSICAL CHEMISTRY B
(2019)
Article
Polymer Science
Takehiro Kawauchi, Keita Ohnishi, Kouta Kajihara, Mariko Kawauchi, Tsutomu Takeichi
Correction
Chemistry, Physical
Mengdi Liu, Takehiro Kawauchi, Tomokazu Iyoda, Piotr Piotrowiak
JOURNAL OF PHYSICAL CHEMISTRY B
(2019)
Article
Polymer Science
Minori Ohara, Kanako Yoshimoto, Takehiro Kawauchi, Tsutomu Takeichi
Article
Polymer Science
Kouta Kajihara, Ituki Tousya, Tomohiro Ueno, Takehiro Kawauchi
Article
Polymer Science
Kenya Komoda, Takehiro Kawauchi
Summary: In this study, size-controlled redox-active organic nanoparticles containing viologen units were synthesized via a one-pot method with precise temperature control enabled by microwave heating. The growth reaction at 80 degrees C and termination reaction at 150 degrees C were conducted to control the nanoparticle size, which was confirmed by H-1 NMR analysis at each step. The nanoparticle diameter could be adjusted by varying the reaction time in the first stage, as shown by dynamic light scattering measurements.
Article
Chemistry, Applied
Nur Amilah Fadlina Basri, Mohd Haniff Wahid, Zulkarnain Zainal, Shahrul Ainliah Alang Ahmad, Mohd Rashidi Abdull Manap
Summary: Cellulose acetate/graphene oxide nanofibers functionalized with p-sulphonated calix[4]arene were successfully prepared through electrospinning technique, showing enhanced adsorption capacity for methylene blue compared to pristine nanofibers.
ADSORPTION SCIENCE & TECHNOLOGY
(2022)
Article
Polymer Science
Taichi Shibatsuka, Takehiro Kawauchi
Summary: Novel polyfunctional benzoxazine monomers containing allyl, ethynyl, and furfuryl groups were synthesized and their thermoset films were investigated. The introduction of crosslinkable groups significantly increased the mechanical and thermal properties of the films.
Correction
Chemistry, Multidisciplinary
Nurul Aqilah Pohan, Mohd Haniff Wahid, Zulkarnain Zainal, Nor Azowa Ibrahim
Article
Chemistry, Multidisciplinary
Nurul Aqilah Pohan, Mohd Haniff Wahid, Zulkarnain Zainal, Nor Azowa Ibrahim
Summary: The study developed lightweight 3D hollow graphene with excellent sorption efficiencies for oil absorption, attributed to its multi-level porosity and high surface area. The graphene can be recycled through ten sorption-desorption cycles without significant losses in efficiency, making it a promising material for oil spill incidents.
Article
Polymer Science
Yuta Murai, Taichi Uemura, Yujie Chen, Takehiro Kawauchi, Tsutomu Takeichi
Summary: High-molecular-weight (HMW) benzoxazines were synthesized and used to produce polybenzoxazines with superior mechanical and thermal properties compared to typical polybenzoxazines derived from low-molecular weight benzoxazines. Among the HMW polybenzoxazines, the film derived from 4,4 '-oxydiphenol and 4,4 '-oxydianiline exhibited remarkably good mechanical properties and thermal stability.
Meeting Abstract
Chemistry, Multidisciplinary
Mengdi Liu, Takehiro Kawauchi, Tomokazu Iyoda, Piotr Piotrowiak
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Meeting Abstract
Chemistry, Multidisciplinary
Zheng Gong, Mengdi Liu, Takehiro Kawauchi, Piotr Piotrowiak
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.
