Polymers
·
2018
·Vol. 10
·期 3
·290
·
IF 2.935
Gaofeng Zhao,Haiyue Ni,Shixue Ren,Guizhen Fang
Although lignin blending with thermoplastic polymers has been widely studied, the usefulness of the lignin–polymer composites is limited by the poor compatibility of the two components. In the present study, alkali lignin/PVA composite membranes were prepared by incorporating 10%, 15%, 20% and 25% alkali lignin into the composites. The thermodynamic parameters of the composites were measured using inverse gas chromatography (IGC). Composite membranes with 10%, 15%, 20%, and 25% alkali lignin had solubility parameters of 17.51, 18.70, 16.64 and 16.38 (J/cm3)0.5, respectively, indicating that the solubility parameter firstly increased, and then decreased, with increasing proportions of alkali lignin. When the alkali lignin content was 15%, the composites had the largest solubility parameters. The composite membrane with an alkali lignin content of 15% had a tensile strength of 18.86 MPa and a hydrophilic contact angle of 89°. We have shown that the solubility parameters of blends were related to mechanical and hydrophilic properties of the composites and the relationships have been verified experimentally and theoretically.Keywords:alkali lignin;composite membrane;inverse gas chromatography;the solubility parameter;preparation of composites;performance of composites
研究领域:
材料科学
·
化学工程
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DOI
PubMed
高影响因子
TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Yuan Qin,Yongfeng Yang,Mingxia Wu,Yi Yang,Gang Yang
To enhance the antiwear properties of halloysite nanotubes (HNTs), composites of C/HNTs, CuO/HNTs, and MoS 2 /HNTs were prepared using hydrothermal method, and their tribological properties were investigated. The results indicated that the wear resistance was ranked as follows during rotational motion: PAO10 oil < CuO/HNTs (9.1%) < MoS 2 /HNTs (34.5%) < HNTs (41.8%) < C/HNTs (56.4%). In reciprocal motion, the antiwear performance was ordered as follows: PAO10 oil < HNTs < MoS 2 /HNTs < CuO/HNTs < C/HNTs. The consistently superior antiwear performance of C/HNTs can be attributed to the synergistic effect of carbon transfer with HNTs, which rapidly generate a homogeneous carbon film embedded in Fe 2 O 3 , Fe 3 O 4 and SiO x . In contrast, MoS 2 and CuO exhibited inhibitory and competitive effects on the film formation of HNTs.
研究领域:
材料科学
·
摩擦学
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产品关联
DOI
高影响因子
POLYHEDRON
·
2022
·
IF 2.975
Yan-Ling Deng,Wei Li,Chun-Yang Pan
Two new metal hybrid borates , Na[Ni(py) 2 ] 2 ·[(C 4 H 2 O 6 ) 2 B]·H 2 O (py = pyridine) ( 1 ) and [Cu(H 2 O) 2 (1-EI) 4 ]·[B 5 O 6 (OH) 4 ] 2 ·H 2 O (1-EI = 1-ethylimidazole) ( 2 ), have been successfully synthesized. 1 features an interesting structure based on mixed borate-tartrate motifs. Two tartrate anions are condensed with one BO 4 to form the hybrid anionic group [(C 4 H 2 O 6 ) 2 B] 5− . The structure of 2 is composed of [B 5 O 6 (OH) 4 ] − clusters and [Cu(H 2 O) 2 (1-EI) 4 ] 2+ complexes, which exhibits hydrogen-bonded network formed by [B 5 O 6 (OH) 4 ] − clusters. These compounds are further confirmed by FTIR, PXRD and UV–vis. In addition, the catalyst prepared from 2 shows excellent electrocatalytic oxygen reduction reaction (ORR) activity.
研究领域:
无机化学
·
电化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Li Liu,Yuefeng Huang,Zhenqiang Kan,Yaohong Yang,Peng Wang,Yuju Chen,Dongyu Wei,Hong Lei,Guanben Du,Lianpeng Zhang
The application of biopolymers in adhesive design holds immense potential for advancing the sustainable manufacturing of high-performance materials. In this study, chitosan (CS), a renewable and biodegradable biopolymer, serves as the structural backbone for developing an innovative organic-inorganic hybrid resin Cu/ZIF-8@CS-MCS@BN. Initially, CS was chemically functionalized via crosslinking with maleic anhydride (MA) to form a maleated chitosan network (CS-MCS), exploiting the biopolymer's abundant amino and hydroxyl groups for covalent bonding. This chitosan-based network was subsequently reinforced with boron nitride nanosheets (BN) and copper-doped ZIF-8 metal-organic frameworks (Cu/ZIF-8), synergistically combining the flame-retardant and mechanical-enhancing properties of inorganic fillers with the organic network of the chitosan matrix. The Cu/ZIF-8@CS-MCS@BN resin was processed into two distinct wood composites: (1) plywood fabricated by hot-pressing poplar veneers with the resin exhibited exceptional interfacial adhesion, achieving a boiling-water-resistant shear strength of 1.01 MPa, which surpasses the requirements of the Chinese national standard GB/T 9846–2015; (2) lightweight aerogels prepared by freeze-drying resin-wood flour mixtures demonstrated outstanding compressive resistance (compressive modulus: 45.23 MPa) and fire safety (limiting oxygen index (LOI) = 42.8 %, UL-94 V-0 rating). This work establishes a green paradigm for fabricating multifunctional wood composites, highlighting the pivotal role of biopolymer engineering in next-generation construction materials.
研究领域:
生物高分子材料
·
胶黏剂设计
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阻燃材料
·
木材加工
·
纳米材料
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yu Jiang,Si-Chao Liu,Li-Ping Zhang,Guo-Wei Guan,Yi-Tao Li,Shuang Ni,Run-Yuan Jiang,Su-Tao Zheng,Hao-Ran Liu,Hao-Ling Lan,Qing-Yuan Yang
The photocatalytic reduction of carbon dioxide (CO 2 ) to carbon-based materials is challenging because of its intricate nature and the generation of multiple byproducts. Hence, developing photocatalysts with a high CO 2 -reduction yield and selectivity is critical. In this study, new photocatalysts (U-B-M, M = Co, Ni) were synthesized by incorporating 1,2-benzisothiazolin-3-one (BIT) into NH 2 -UiO-66, to create N, N’-chelating sites via an amine–aldehyde condensation reaction, followed by metal-ion chelation. The introduction of BIT decreased the resistance of the catalyst and enhanced the separation of photogenerated carriers. The catalytic performance of U-B-Ni (rate: 3.10 mmol·g −1 ·h −1 ; selectivity: 97 %) surpasses those most of all previously reported MOF-based photocatalysts. Moreover, U-B-Ni shows high stability and negligible deactivation on catalytic cycling for over 16 h. This study expands the utility of metal–organic frameworks (MOF) in photocatalysis and highlights the importance of amine–aldehyde condensation in MOF modification.
研究领域:
材料科学
·
环境科学
·
化学工程
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产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Bi Yuhe,Sun Jianhui,Cao Sheng,Li Qiuyan,Zheng Jinju,Yuan Xi,Wang Yunjun,Zou Bingsuo,Zhao Jialong
As next-generation display technologies, eco-friendly colloidal quantum dot light-emitting diodes have drawn great attention due to their excellent luminescence properties, along with their rapid development. However, practical applications of eco-friendly quantum dot light-emitting device remain challenging, primarily due to the inferior performance of green device, which still lag behind their red and blue counterparts. Herein, we present efficient green device based on interfacial potential-graded ZnSeTe quantum dots. Our findings show that this potential-graded structure alleviates interfacial lattice mismatch and strain, reducing structural deformation and misfit defects. The smoothed interfacial potential suppresses the nonradiative recombination processes, particularly Auger recombination revealed by excitation-intensity dependent ultrafast transient absorption kinetics. Consequently, the interfacial potential-graded quantum dots demonstrate highly efficient green quantum dot light-emitting diodes, with a peak external quantum efficiency of 21.7% at 520 nm and a corresponding current efficiency of 75.7 cd A −1 .
研究领域:
材料科学
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光电子学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Biomaterials Science
·
2020
·Vol. 9
·期 5
·1795-1804
·
IF 6.183
Dan-Lei Yang,Ya-Nan Cui,Qian Sun,Mei Liu,Hao Niu,Jie-Xin Wang
The accumulation of bacteria at the margin of dental resin composites is the main reason for secondary caries, which may further cause failure of prosthodontics. Therefore, antibacterial activity is highly required. However, the addition of antibacterial agents or fillers weakens the mechanical or aesthetic properties of composites. In this work, regular-shaped SiO2–ZnO complex clusters (CCs) constructed by spray-drying technology can enhance the antibacterial activity while maintaining the mechanical and aesthetic properties of dental resin composites. The results show that the regular shape and closely packed structure of nanoparticle clusters were not corrupted by the introduction of ZnO particles. As compared to resin composites filled with SiO2 nanoparticle clusters, the comprehensive performances of composites containing SiO2–ZnO CCs were further improved, and the composites filled with 70 wt% Si66Zn4 (CCs composed of 66/70 SiO2 and 4/70 of ZnO) exhibited superior antibacterial capability (antibacterial ratio >99.9%) and acceptable depth of cure, degree of conversion, and biocompatibility. The cooperation of different fillers is highly essential for resin composites to achieve enhanced multifunctional performance.
研究领域:
材料科学
·
口腔医学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
ANALYST
·
2015
·Vol. 140
·期 6
·1913-1920
·
IF 4.107
Cong Li,Jingyu Zhao,Xiaoyi Yan,Yue Gu,Weilu Liu,Liu Tang,Bo Zheng,Yaru Li,Ruixue Chen,Zhiquan Zhang
Electrochemical detection of dopamine (DA) plays an important role in medical diagnosis. In this paper, tremella-like graphene–Au (t-GN–Au) composites were synthesized by a one-step hydrothermal method for selective detection of DA. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Raman spectroscopy, and Fourier transform infrared (FTIR) spectroscopy were used to characterize as-prepared t-GN–Au composites. The t-GN–Au composites were directly used for the determination of DA via cyclic voltammetry (CV) and the chronoamperometry (CA) technique. CA measurement gave a wide linear range from 0.8 to 2000 μM, and the detection limit of 57 nM (S/N = 3) for DA. The mechanism and the heterogeneous electron transfer kinetics of the DA oxidation were discussed in the light of rotating disk electrode (RDE) experiments. Moreover, the modified electrode was applied to the determination of DA in human urine and serum samples.
研究领域:
医学诊断
·
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED THERMAL ENGINEERING
·
2024
·
IF 6.1
Zhiyuan Zhang,Ning Zhang,Jintao Li,Lei Chen,Xing Cao
Although the phase change material (PCM) is increasingly recognized for its potential in battery thermal management application, the effectiveness of PCM is hindered by issues such as high rigidity, prone leakage and low thermal conductivity. To get rid of such predicament, a novel flexible composite PCM containing the myristyl alcohol/olefin block copolymer/MXene is fabricated and tested in this paper, and then the applicability of this composite PCM on battery thermal management is evaluated through numerical simulation. The results indicate that the MXene enhances the thermal conductivity of the composite PCM, and up to 207 % increment is acquired by 15 wt% MXene. The excellent thermally-induced flexibility of the composite PCM is realized owing to the olefin block copolymer. Under the cooperative action of the MXene and the olefin block copolymer, the composite PCM features outstanding thermal reliability. As for the battery cooling application, the composite PCM features superior characteristic than the air. Considering the better thermal control performance, the low MXene addition in the composite PCM is appropriate for the high discharge rate, while the high MXene addition is suitable for the low discharge rate. The PCM thickness between parallel batteries exerts greater impact on battery thermal management in contrast to the PCM thickness between series batteries. The prepared composite PCM can meet the thermal control requirements when the ambient temperature is 20–35 °C.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Yuanming Zhou,Zhenxiao Tang,Ruizhi Liu,Zhe Zhou,Maozhong Yi,Ke Peng
To further enhance the ablation resistance of C/C composites, solid solution ceramic Ta 0.2 Zr 0.8 C was used to replace traditional ultra-high-temperature ceramic carbides for matrix modification of C/C composites. The C/C-Ta 0.2 Zr 0.8 C-SiC composite was fabricated by a high-solid-loading slurry impregnation combined with the precursor infiltration and pyrolysis process. The comparative samples of C/C-ZrC-SiC and C/C-TaC-SiC were also prepared using these same technologies. The microstructure, flexural properties, and ablation performance of the composite were investigated. Results showed that the C/C-Ta 0.2 Zr 0.8 C-SiC exhibited excellent overall flexural properties. During the ablation test under an oxyacetylene flame with high heat flux, the ablation resistance of C/C-Ta 0.2 Zr 0.8 C-SiC improved with prolonged ablation time, reaching mass and linear ablation rates of 0.67 mg/s and 0.18 μm/s after 120 s of ablation. Compared to the C/C-ZrC-SiC and C/C-TaC-SiC, the mass ablation rate of the composite was reduced by 49.24% and 68.70%, and the linear ablation rate was reduced by 97.22% and 97.71%, respectively. The enhanced ablation resistance was primarily attributed to the formation of the Ta-Zr-O oxide layer, composed of TaZr 2.75 O 8 , ZrO 2 , and Ta 2 O 5 , on the composites surface. In the oxide layer, the Ta-rich oxides served as a binder, filling gaps in the interface. Meanwhile, the Zr-rich oxides formed the skeleton that pinned the molten liquid oxides. The combined effects of Ta-rich and Zr-rich oxides made the Ta-Zr-O oxide layer more compact and strongly bonded to the matrix.
研究领域:
材料科学
·
航空航天工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Kanxing Chen,Jincheng Liu,Zhilin Huang,Shuang Zong,Lingling Liu,Wei Tan
Photocatalytic hydrogen evolution is a prospective approach to solve the problem about energy crisis by fossil fuel combustion . As a possible novel photocatalyst for hydrogen generation , MnPS 3 suffered from the lower photocatalytic activity caused by its high electron-hole recombination rate and poor oxidation capability of holes. In this paper, the MnPS 3 nanosheets were exfoliated under sonication process in the solution of N-methylpyrrolidone (NMP) and 3-ethoxypropylamine, and then a series of Z-scheme 2D-0D MnPS 3 –Cs 4 W 11 O 35 composites were prepared by a facile electrostatic assembling approach. The exfoliated MnPS 3 nanosheets with the thickness of 5.4 nm present evidently increased interlayer spacing of 17.6 Å compared with 6.42 Å of bulk MnPS 3 . The Cs 4 W 11 O 35 of 20–25 nm are uniformly immobilized on the surface of 400 nm exfoliated MnPS 3 sheets with strong interfacial interaction of S–W–O bonds. The MnPS 3 –Cs 4 W 11 O 35 composites show extended light absorption area, reduced charge recombination and significantly improved hydrogen generation activity compared with MnPS 3 nanosheets. The highest hydrogen evolution rate of the MnPS 3 –Cs 4 W 11 O 35 composites reaches 99.6 μmol g −1 h −1 with a Cs 4 W 11 O 35 mass percent of 10.9, which is 2.9 times of MnPS 3 nanosheets. The photocatalytic activity of MnPS 3 –Cs 4 W 11 O 35 remains nearly unchanged after 4 cycles. As far as we are aware, there is no work carried out on the exfoliation of MnPS 3 sheets in NMP and the fabrication of MnPS 3 –Cs 4 W 11 O 35 composite for the enhanced photocatalytic hydrogen generation yet. Our work provides a new reference method for the preparation of unlaminated composite materials, and the novel MnPS 3 -based composite will be a useful supplement to the photocatalytic production of clean energy.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2020
·Vol. 12
·期 1
·1-16
·
IF 12.264
Deng Baiwen,Xiang Zhen,Xiong Juan,Liu Zhicheng,Yu Lunzhou,Lu Wei
Sandwich-like laminated Fe&TiO 2 @C nanocomposites were successfully prepared from the MXene–MOFs hybrids.
A broad effective bandwidth of 6.5 GHz at a thickness of only 1.6 mm was achieved.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）