INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Yuhao Che,Wenhui Li,Chunqi Wang,Xuemin Zhang,Zilei Guo,Aziz Bakhtiyarovich Ibragimov,Junkuo Gao
The development of materials with superior thermal insulation and flame retardancy is critical for industrial applications and daily life. Metal–organic framework (MOF)@poly(vinyl alcohol) (PVA) (MOF@PVA) aerogel composites have demonstrated remarkable thermal insulation and flame retardancy properties. In this work, MIL-53(Al) was directly mixed with PVA and formed by freeze-drying, and the influence of the pore structure on the thermal insulation and flame retardancy properties of the materials was investigated. The incorporated MIL-53(Al) nanoparticles introduced abundant micro- and mesopores, enhancing the complexity of the pore structure and improving the thermal insulation and flame retardancy properties of the aerogels. The directionally freeze-cast aerogel achieved a thermal conductivity of 0.040 W·mK–1, and maintained excellent thermal insulation ability even at 220 °C. Furthermore, the aerogel exhibited nonflammable and self-extinguishing characteristics. This environmentally friendly manufacturing method provides new ideas for the design of MOF-based composites, thereby expanding their application areas.
研究领域:
材料科学
·
化学工程
·
热能工程
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产品关联
DOI
PubMed
高影响因子
Materials
·
2022
·Vol. 15
·期 8
·2795
·
IF 3.748
Dongwei Wei,Fanhui Zhou,Hongdi Wang,Guijin Liu,Jun Fang,Yanbin Jiang
In order to prepare edible films with outstanding antimicrobials and antioxidants utilized in applications of food and pharmaceutics, in this study, effects of surfactants on zein cast films for simultaneous delivery of lysozyme (LY) and ascorbic acid (AA) were investigated, where sodium alginate (SA), soy lecithin (SL), and Pluronic f-68 (PF-68) were selected as surfactants. FT-IR tests indicated that SL or PF-68 dramatically changed secondary structure of zein composite films, which heightened the irregularity of the composite film and inhibited LY crystallization. Mechanical tests showed that highly flexible films exhibiting elongations between 129% and 157% were obtained when adding PF-68. Compared with the film without emulsifier, zein film containing SL and PF-68 showed approximately 7.51 and 0.55 times lower initial release rates for LY and AA respectively, which significantly improved the controlled release and heightened the anti-microbial and anti-oxidant activities of the film. Finally, emulsified mechanisms of the surfactants in zein films were proposed.Keywords:zein;surfactant;lysozyme;ascorbic acid;controlled release;emulsified mechanism
研究领域:
食品科学
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药剂学
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材料科学
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 2
·2108548
·
IF 18.808
Gang Guo,Qian Wu,Fengrui Liu,Jun Yin,Zi Liang Wu,Qiang Zheng,Jin Qian
A facile approach is reported for manufacturing morphing hydrogel structures based on solvent-cast-assisted printing. Poly(stearyl acrylate- co -acrylic acid) (P(SA- co -AAc)) ethanol solution is printed into fibers in air, where evaporation of the solvent led to sol–gel transition of the “ink”. The printability of ink can be effectively regulated by polymer concentration ( C p ) and nozzle diameter. After swelling the printed structures into water, the alkyl chains of SA units are segregated into hydrophobic domains, crosslinking the tough hydrogels. The swelling ratio and mechanical properties of printed gel varied with evaporation time before being swollen in water. Smooth hydrogel fibers with a diameter of ≈200 µm and good mechanical properties can be obtained by evaporating 70–80 wt% of the solvent in 1 h. The upper layer of printed fibers, undergoing less evaporation period, exhibits higher swelling ratio yet reduced modulus than the bottom one. Using this swelling mismatch, diverse morphing hydrogel constructs are achieved by controlling the printed patterns. After swelling, these hydrogel constructs show controllable deformations with bioinspired morphologies. This facile strategy could be applicable for the printing of other tough physical hydrogels that are soluble in low boiling-point solvents, with controllable architectures and morphing capacity under external stimuli.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2020
·
IF 3.408
Yang Wang,Qiang Liu,Biao Zhang,Junjie Ding,Haoqian Zhang,Yicheng Jin,Zhaoxin Zhong,Wen Wang,Feng Ye
The boron oxide and impurities existing on the surface of B 4 C powder are detrimental to the sintering of the green body, greatly limiting its application. Here, we utilize three powder pretreatment methods, including washing powder in acid solution, alkali solution and ethanol solution, to solve this problem. Furthermore, the produced freeze-cast porous B 4 C ceramics with unidirectionally aligned pore channels are studied in terms of the sinterability, pore morphology, microstructure and mechanical properties . The powder pretreatments contribute to the remove of boron oxide and impurities as well as the acceleration of densification process of the porous ceramics . The decreased porosity, wavelength and lamellar thickness, and high pore connectivity are the main reasons for the enhanced mechanical properties especially in the direction perpendicular to the freezing. By comparison, the purification with acid solution is established as the optimal technique for powder pretreatment. The research confirms that the pretreatment of B 4 C powder is essential for the removal of boron oxide and impurities to improve performance, thereby widening the application scopes of materials.
研究领域:
材料科学
·
陶瓷工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 3.1
Heng Li,Dongwei Chu,Mingming Zhou,Huiyu Zhao,Jiule Gong,Lange Li,Wei Zhao,Jingjiang Sun,Qingfu Wang
4,4′-Diaminodiphenylmethane (MOCA)-based cast polyurethane (CPU) elastomers possess excellent mechanical properties but often exhibit insufficient wear resistance under high-load or abrasive conditions. To address this, surface-modified silica nanoparticles (D-SiO 2 ) were prepared using (N, N-dimethyl-3-aminopropyl)trimethoxysilane (DAPS) and incorporated into the CPU matrix via a solvent-assisted casting method. The introduced tertiary amine and organic groups on D-SiO 2 facilitated covalent bonding and hydrogen bonding with the CPU, significantly enhancing interfacial compatibility and dispersion uniformity. At an optimal loading of 0.3 wt%, the composite achieved a remarkable tensile strength of 59.1 MPa and an elongation at break of 394.75%, representing a substantial improvement over the neat CPU (44.2 MPa, 376.33%). Furthermore, the wear resistance was notably enhanced, with the abrasion volume reduced by 34% compared to the unfilled system, while the friction coefficient remained stable. This work demonstrates that low-loading, surface-modified silica can effectively reinforce MOCA-based CPUs, offering a viable strategy for developing high-performance MOCA-based CPU elastomers.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yunxing Chen,Hang Yang,Suming Li,Yunfan Yang,Bohong Yang,Xiaolong Wang,Dandan Gao,Ming Huang,Chunhui Wang,Wanbiao Hu
We present a strategy to prepare bilayer reduced graphene oxide aerogels with hierarchical structure (rGAH) via two-step directional freeze-casting with spatial rotation, addressing the limitations of conventional homogeneous counterparts in achieving absorption-dominant and tunable electromagnetic interference (EMI) shielding. The architecture synergistically integrates an upper layer with vertically aligned pores for optimized impedance matching (reduce reflection loss) and a lower honeycomb-structured reflective shield, synergistically enhancing microwave absorption through dual electrical-structural gradients. Orthogonal pore alignment enables ultra-low in-plane thermal conductivity (0.012 W/(m·K)), surpassing most reported graphene aerogels. Incorporating 50% carbon nanotubes into the reflective layer yields exceptional EMI shielding effectiveness (54.2 dB) with a high absorption coefficient (A = 0.88). The compressible design permits dynamic modulation of EMI shielding (absorption-reflection ratio: 1.9–3.7) and electrothermal performance, featuring rapid Joule heating (58 °C at 3.5 V within 10 s) and compression-dependent tunability (0–90% strain). This orthogonally engineered bilayer platform, extendable to diverse 2D nanomaterials (e.g., MXenes), provides a scalable strategy for multifunctional shielding materials with programmable thermal/electrical properties. By structurally optimizing aerogels with dynamic responsiveness, our work advances excellent electromagnetic protection systems, demonstrating potential for next-generation shielding technologies.
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高影响因子
RSC Advances
·
2024
·Vol. 14
·期 50
·36980-36988
·
IF 3.9
Xinyu Feng,Qi Xue,Junlin Zhang,Kaidi Yang,Kunkai Wang,Bozhou Wang,Fuqiang Bi
To modify the sensitivity and melting point of the casting of DNTF, a eutectic system of insensitive explosive 3,5,5-trinitro-1,3-oxazinane (TNTON) and DNTF was prepared through a new method. The melting and liquefaction processes of TNTON/DNTF at different ratios were investigated, and a T–x phase diagram was established. The melting and decomposition processes of TNTON, DNTF, and TNTON/DNTF eutectic at different heating rates were compared, while the sensitivity tests were conducted to study the desensitizing effect of TNTON on DNTF. Using EXPLO-5 software, the detonation performance of the TNTON/DNTF eutectic was calculated. The experimental results show that the stoichiometric composition of the TNTON/DNTF eutectic is 58.26 : 41.74, with an average melting point of 69 °C. With the increase of heating rate, both the melting and decomposition reactions are delayed. According to the activation energy (Ea) curve, the thermal decomposition is through an autocatalytic process. The impact and friction sensitivity of the TNTON/DNTF eutectic are 38 J and 252 N, respectively. Theoretical density of the TNTON/DNTF eutectic is 1.906 g cm−3, and the calculated detonation velocity is 8921 m s−1. The TNTON/DNTF eutectic exhibits good thermal stability and can significantly reduce the sensitivity of DNTF while maintaining its high energy level. The detonation performance of TNTON/DNTF low eutectic cast explosive is better than that of TNT based cast explosive.
研究领域:
化学工程
·
爆炸物科学
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产品关联
DOI
PubMed
高影响因子
POLYMER BULLETIN
·
2016
·Vol. 74
·期 5
·1817-1830
·
IF 1.371
Jiang Xiancai,Zhang Xi
In this paper, the chitosan/starch (CS/ST) cast films were prepared using AlCl 3 ·6H 2 O aqueous solution as the solvent for CS. AlCl 3 ·6H 2 O was retained in the CS/ST film acting as the plasticizer and glycerol were added to form the complex plasticizer with AlCl 3 ·6H 2 O. The effect of the complex plasticizer of AlCl 3 ·6H 2 O and glycerol on the crystalline, thermal stability, and mechanical properties of CS/ST films was studied by X-ray diffraction, thermal gravity analysis, and tensile testing, respectively. The results showed that AlCl 3 ·6H 2 O aqueous solution was a better solvent for CS than acetic acid aqueous solution which is the most commonly used solvent of CS. With AlCl 3 ·6H 2 O aqueous solution as the solvent, the thermal degradation of CS and ST in the dissolving process was weakened. Glycerol could form the synergism plasticizing effect with AlCl 3 ·6H 2 O. With the complex of AlCl 3 ·6H 2 O and glycerol as the plasticizer, the CS/ST film with the good mechanical properties could be obtained.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
CLINICA CHIMICA ACTA
·
2016
·
IF 2.799
Dongneng Jiang,Danni Ni,Fei Liu,Liqun Zhang,Linlin Liu,Xiaoyun Pu
Background Renal disease has become a global public health problem. Cast is a useful disease marker of kidney injury and renal failure. Hence, a cast-targeted fluorescent imaging assay is developed for the laboratory diagnosis of renal disease. Methods Firstly, graphene quantum dots (GQDs) were stripped from graphene oxide sheets and amine-modified. Then, anti-human IgG antibody was conjugated with Fe 3 O 4 nanoparticles to identify the cast in urine. Furthermore, the modified GQDs were linked onto the surface of Fe 3 O 4 /anti-IgG nanocomposites. Lastly, this Fe 3 O 4 /GQD fluorescent probe was added into the sample to detect the cast through fluorescent imaging. Results Preliminary application of this probe in clinical detection showed that the common types of casts in urine (including RBC , WBC, fatty and granular casts) could be detected by this fluorescent imaging assay. The method has the advantages of fast speed, high sensitivity (lowest detection limit to 2 casts/ml), good selectivity, and wide linear range (2–2000 casts/ml). Regression analysis also showed that there was a good linear relationship (y = 0.9495 × + 10.974, R 2 = 0.9879) between the fluorescent counts and the casts in urine. Conclusion This cast-targeted fluorescent imaging assay may be a potential method for the laboratory diagnosis of renal disease.
研究领域:
医学诊断
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生物化学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Zhengwei Guo,Guojian Lin,Lu Li,Peng Cao,Zhentao Yuan,Xiao Wang,Quan Shan,Zulai Li
This study aims to achieve synergistic strength-ductility enhancement of semi-solid squeeze cast 6TiB 2 /Al–17Si–4Cu composites through in-situ particle strengthening and T6 heat treatment. The microstructure and mechanical properties of 6TiB 2 /Al–17Si–4Cu composites with different heat treatments were investigated. TiB 2 particles are semi-coherent with α-Al and primary Si, respectively. The nanoscale precipitate phases were determined by their crystal orientation relationships. The results showed that they are θ and θʹ phases. Meanwhile, the research results pertaining to the mechanical properties imply that the strength and ductility are enhanced by the TiB 2 particles and Al 2 Cu precipitates. The optimum heat treatment process (solution treatment for 9 h at 520 °C and aging for 8 h at 170 °C) of strengthened 6TiB 2 /Al–17Si–4Cu composites is revealed in this study, when the ultimate tensile strength and elongation of the composites are 263.3 MPa and 0.51%, respectively. The mechanisms governing the enhanced strength and ductility of 6TiB 2 /Al–17Si–4Cu composites were discussed.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Hairui Weng,Yuhao Zou,Chenyao Wang,Mingjuan Li,Luyi Sun,Xinzhi Chen
All-solid-state lithium batteries (ASSLBs) are considered to be the next generation of the most promising lithium battery technology due to their energy density, safety and stability. Nevertheless, the solid-state electrolyte (SSE), a critical element in ASSLBs, encounters notable obstacles like limited ionic conductivity and elevated interfacial impedance. A sandwich like composite solid electrolyte is proposed to address the above issues. This design features a ceramic-rich (CR) solid electrolyte membrane sandwiched between two polymer-rich (PR) solid electrolyte membranes (named PR-CR-PR). The CR membrane offers mechanical strength, preventing lithium dendrites from penetrating, while the PR membranes enhance interfacial contact with the electrodes. The PR-CR-PR electrolyte not only enhances the stability of Li metal, enabling stable cycle for over 500 h, but also extends the electrochemical window to 6.17 V. Electrochemical results show that the LiFePO 4 /PR-CR-PR/Li battery achieves a specific capacity of 161.97 mAh g −1 at 0.2 C. The battery still maintains a high discharge specific capacity of 147.72 mAh g −1 and a capacity retention rate of 91.2 % after 500 cycles. This study demonstrates a promising strategy to prepare low-cost and highly stable electrolytes using a multilayer design for further mass production of high energy density ASSLBs.
研究领域:
材料科学
·
能源技术
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产品关联
DOI
高影响因子
Materials Futures
·
2022
·Vol. 1
·期 4
·045301
·
IF 0
Junjie Wang,Danyang Li,Jian Wang,Junbiao Peng
Quasi-two-dimensional (quasi-2D) perovskites are promising materials for potential application in light-emitting diodes (LEDs) due to their high exciton binding energy and efficient emission. However, their luminescent performance is limited by the low-n phases that act as quenching luminescence centers. Here, a novel strategy for eliminating low-n phases is proposed based on the doping of strontium bromide (SrBr2) in perovskites, in which SrBr2 is able to manipulate the growth of quasi-2D perovskites during their formation. It was reasonably inferred that SrBr2 readily dissociated strontium ions (Sr2+) in dimethyl sulfoxide solvent, and Sr2+ was preferentially adsorbed around [PbBr6]4− through strong electrostatic interaction between them, leading to a controllable growth of quasi-2D perovskites by appropriately increasing the formation energy of perovskites. It has been experimentally proved that the growth can almost completely eliminate low-n phases of quasi-2D perovskite films, which exhibited remarkably enhanced photoluminescence. A high electroluminescent efficiency matrix green quasi-2D perovskite-LED (PeLED) with a pixel density of 120 pixels per inch fabricated by inkjet printing technique was achieved, exhibiting a peak external quantum efficiency of 13.9%, which is the most efficient matrix green quasi-2D PeLED so far to our knowledge.
研究领域:
材料科学
·
光电子学
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DOI
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