International Journal of Minerals Metallurgy and Materials
·
2023
·Vol. 30
·期 3
·548-558
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IF 4.8
Li Qiuying,Lu Yiheng,Shao Zhuoyan
A new type of composite filler was designed by a modified sol—gel method using fly ash (FA), Fe(NO 3 ) 3 ·9H 2 O, and Ni(NO 3 ) 2 ·6H 2 O as raw materials. The composite filler was a spherical core-shell structure composed of FA as the core and NiFe 2 O 4 as the shell. Further, the composite filler was added into the silicone rubber to fabricate the high temperature vulcanized microwave absorption materials; X-ray diffraction, fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscope confirmed that NiFe 2 O 4 was successfully coated on the surface of FA and formed a uniform and continuous coating layer. As expected, silicone rubber filled with the composite filler had a minimum reflection loss of −23.8 dB at 17.5 GHz with the thickness of 1.8 mm, while the effective absorption bandwidth was as high as 12 GHz. The addition of the composite filler greatly enhanced the microwave absorption properties of the system, which was resulted from multiple losses mechanism: interface polarization losses, magnetic losses, and multiple reflection losses. Also, silicone rubber filled with the composite filler exhibited excellent thermal stability, flexibility, environmental resistance, and hydrophobicity compared with traditional silicone rubber. Therefore, this work not only responds to the green chemistry to achieve efficient FA recovery, but also devises a new strategy to prepare microwave absorption materials with strong potential for civilian applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
NORDIC PULP & PAPER RESEARCH JOURNAL
·
2022
·Vol. 37
·期 3
·470-479
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IF 1.595
Jingyi Nie,Xinming Liu,Jiantao Liang,Meiyun Zhang,Wenjia Han
Fillers are the second major component of paper, and can give certain properties to paper-based materials. However, if we want to use fillers to develop novel functional paper-based materials, some challenges have to be considered such as filler functionality, retention rate, and the negative effects. To meet with these challenges, the present work proposed a fabrication concept of bio-based composite fillers. The concept combined the crystallization of target component and the gelation process of chitosan (CS), simultaneously. The gels carried and protected the crystals, and served as bridge between crystal of fillers and the paper matrix. To explore and demonstrate the concept, CaCO 3 /CS bio-based composites were successfully fabricated. The composite fillers were further optimized to be suitable for paper-making. The fabrication concept could significantly increase the filler retention rate (up to 90.57 %), the filler bondability (increased over 10 times) and the mechanical strength (59.7 % higher than paper without fillers). The fabrication concept was also applicable to functional materials. Zeolitic imidazolate framework-8 (ZIF-8)/CS composite fillers were successfully fabricated, and endowed the resulted paper with high surface area (180 times higher than pure cellulose paper). This fabrication concept would be useful to develop functional paper-based materials in the future.
研究领域:
材料科学
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造纸工程
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功能材料
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yuchao Mao,Ruitao Wang,Zihua Wang,Xingxing Ni,Huaiyuan Wang
A novel approach of fully recycling waste acid to synthesize polyaniline (PANI) and the composite fillers is introduced. The filtrates in washing procedure were precisely divided and assigned to synthesize PANI, purify PANI and fabricate composite fillers with different nanostructures, respectively. The PANI utilizing this zero-acid emission method presents similar performances compared with the newly-synthesized one. The epoxy coating embedded with PANI and 30 wt% of composite fillers of sericite/BaSO 4 by the recycling method shows excellent anticorrosion performance via electrochemical impedance spectroscopy and neutral salt spray tests due to excellent barrier and passivation effects. These findings provide a new method to produce PANI and composite fillers for anticorrosion coatings of high performance through the low-cost and large-scale manufacturing process.
研究领域:
材料科学
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化学工程
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腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Peng Zhou,Xiangzhou Li,Hua Yuan,Jun Zhou,Limin Qu,Yanhong Yang,Guang He,Chenyun Luo
A promising new composite filler with hygroscopic and antibacterial properties was developed based on the Fructus Aurantii Immaturus solid residues (FAIR) from Citrus aurantium L. , a typical bulk forest industrial crops. FAIR@AM-APTAC composite filler was established using FAIR as substrate, allyl glycidyl ether (AGE) as the cross-linker, while functional monomers of acrylamide (AM) and (3-acrylamidopropyl) trimethyl ammonium chloride (APTAC) were introduced. The structure of FAIR@AM-APTAC was characterized by FTIR, SEM, BET and TG–DSC analysis. The results confirmed that the FAIR@AM-APTAC composite filler was successfully prepared, which exhibited a three-dimensional(3D) network structure with a specific surface area of 0.1758 m²/g and exhibited excellent thermal stability. The equilibrium percent moisture absorption of FAIR@AM-APTAC (63.0%) was higher than that of FAIR (15.7%) under RH= 80% at 25 ℃ for 48 h, and much better moisture adsorption was achieved. The moisture adsorption process of FAIR@AM-APTAC followed a type III moisture adsorption isotherm and conformed to GAB, Peleg and pseudo-second order kinetics model. The moisture adsorption process of FAIR@AM-APTAC was a multi-layer adsorption process with enthalpy driven non-spontaneous and endothermic, which was dominated by chemical adsorption simultaneous existing physical adsorption, and the adsorption force was the synergy of both hydrogen bond and van der Waals force. The inhibition ratio of FAIR@AM-APTAC was 97.1% for E. coli and 95.4% for S. aureus . The antimicrobial efficacy of FAIR@AM-APTAC was enormously improved compared with that of FAIR due to the introduction of quaternary ammonium groups. The antibacterial mechanism of FAIR@AM-APTAC may be that the surface contact between bacterial and FAIR@AM-APTAC leads to inactivation. Significantly, FAIR@AM-APTAC showed long-acting hygroscopic and antibacterial properties, with little weakness even after 120 times cycle of wetting-drying. It is expected to be applied to an indoor air purifier or filter.
研究领域:
材料科学
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植物学
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环境科学
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产品关联
DOI
高影响因子
POLYMER BULLETIN
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2022
·Vol. 80
·期 3
·3103-3117
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IF 2.843
Wang Zi-Qiang,Zhang Yue-Fei,Li Yan,Zhong Jin-Rong
A novel composite filler sodium lignosulfonate/nano calcium carbonate (SL/CaCO 3 ) was prepared by dry ball milling. Thermogravimetric analysis revealed that the composite filler SL/CaCO 3 had improved thermal properties. The crystallization and melting behavior of isotactic polypropylene (iPP) modified by the composite filler was studied by differential scanning calorimetry. The best complex ratio (1:3) and optimal addition amount (2 wt%) of iPP nucleated by SL/CaCO 3 were confirmed. The results reflected that a small amount of SL/CaCO 3 into iPP could improve the nucleation ability, and excellent mechanical properties were obtained. The relative contents of β ‐crystals ( K β ) in iPP were above 0.83 after addition of the composite filler. At the same time, nano CaCO 3 played a significant role in crystallizing the iPP nucleated and greatly influenced the content of β -crystals. The elongation at break was increased by 32.27% and the impact strength was increased by 62.38% compared to those of pure iPP.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2025
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IF 5.6
Liangbo Sun,Tipeng Shan,Jie Zhang,Yongheng Lu,Chunfeng Liu,Shuohao Wang
Glass-ceramic is commonly considered to be an excellent bonding filler for SiC ceramic joints. However, the mismatch in the coefficient of thermal expansion (CTE) between the filler and SiC may induce microcracks in the joint, leading to a subsequent deterioration in mechanical performance. To address this issue, this study introduces silicon carbide ceramic particles into CaO-Al 2 O 3 glass-ceramic (SiC p /CA composite filler) to mitigate the adverse effects on the joint microstructure and mechanical properties caused by the mismatch of CTE. The feasibility of the SiC p /CA combination was preliminarily explored through wetting experiments. The thermal expansion measurement on the SiC p /CA composite filler indicate that adding SiC p to the CA glass-ceramic can closely match its CTE with that of the SiC substrate, thereby minimizing the residual stress in the joint. When SiC p /CA composite filler is used to join SiC ceramics, the results demonstrate a uniform microstructure in the joint, with a well-bonded interface. The joint structure is consist by Ca 12 Al 14 O 33 and SiC p . When using 20 wt% SiC p /CA composite filler to join SiC ceramic, the shear strength of the joint is 50 MPa, marking a substantial 100 % increase compared to the joints using CA glass-ceramic under identical conditions. This highlights the effectiveness of incorporating SiC p into CA glass-ceramic in significantly enhancing the mechanical properties of SiC joints.
研究领域:
材料科学
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陶瓷
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复合材料
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连接技术
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Qianqian Yin,Chijia Wang,Yize Liu,Shuyi Liu,Jianxin Wang,Weihao Fan,Xueqing Wang,Huaiyuan Wang
organic-inorganic composite fillers were successfully prepared by a simple one-pot film-like coating of poly (α-cyanoethyl acrylate) (PECA) on mica. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and thermogravimetric analysis (TG) were used to analyze the structure, morphology, and chemical composition of the organic-inorganic composite filler and pure mica in detail. The organic-inorganic composite filler was added to epoxy resin to prepare a composite coating with long-lasting anti-corrosion and wear-resistance properties. The composite coating was characterized by electrochemical impedance spectroscopy (EIS), high-pressure CO 2 corrosion tests, friction performance tests, differential scanning calorimetry (DSC), and adhesion performance tests. The mechanical test results showed that the average wear quality of the EP/P 30 &M (8/2) composite coating prepared with the modified filler was reduced to 65.7 % of that of the EP/MICA (8/2) coating. The addition of the modified filler to the coating substantially improved the wear resistance and crosslinking of the composite coating, reduced the porosity, increased the density, and effectively improved the overall performance of the composite coating. The results of high-pressure CO 2 corrosion tests in harsh environments and electrochemical impedance spectroscopy showed that the composite coating had excellent barrier capacity. After high-pressure CO 2 corrosion tests, the EP/P 20 &M (9/1) composite coating still has a high impedance modulus value of 6.348 × 10 10 Ω/cm 2 at 0.01 Hz, which is 5 orders of magnitude higher than that of the pure epoxy coating, and showsed excellent long-lasting corrosion resistance in EIS tests. This study provides new ideas for the industrial application of mica and the preparation of long-lasting anti-corrosion coatings.
研究领域:
材料科学
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腐蚀与防护
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Yurou Chen,Yili Wei,Wenjun Song,Yiwen Zhang,Wenjie Tan,Jun Li,Shun Wang,Yadong Wu,Huile Jin
Phenolphthalein (PHT) is always applied as an acid-base indicator but suffers from too wide a range of characterization and uneven dispersion in thin films. To solve this problem, in this work, a composite filler SiO₂@PHT-1 with a jujube cake structure was designed. The size of phenolphthalein particles was effectively regulated by intervening in the growth process of phenolphthalein nuclei through silica (SiO₂). This also improved the dispersion of PHT in fluororubber (FKM) films, as well as the indicator film's tensile strength (57.1%) and initial decomposition temperature (201.6 °C), resulting in the pH indicator film with excellent tensile properties and thermal stability. The FKM/SiO₂@PHT-1 film is also capable of determining the pH value of a solution based on color and phenomena. In addition, the dense protective layer formed by the silica retards the release of PHT in the sample solution, which contributes to the reusability of the film. This method shows great promise and can be applied to laboratory and swimming pool alkalinity testing.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Biomaterials Science & Engineering
·
2024
·
IF 5.4
Yuting Wang,Shengjie Xiao,Siyi Lv,Xiuzhi Wang,Rong Wei,Yu Ma
Dental resin composites (DRCs) are commonly used to restore teeth affected by dental caries or defects. These materials must possess excellent properties to withstand the complex oral environment. The objective of this study was to prepare and characterize Boron nitride nanosheets (BNN)/ dimethyl amino hexadecyl methacrylate (DMAHDM) composites (BNN/DMA), and to evaluate them as functional fillers to enhance the mechanical and antimicrobial properties of dental resins. The BNN/DMA composites were successfully prepared under the theoretical guidance of molecular dynamics (MD), and then the physicochemical and morphological characterization of the BNN/DMA composites were carried out by using various test methods, such as FT-IR, XRD, UV–vis spectroscopy, SEM, TEM, and AFM. It was doped into the dental flowable resin in a certain proportion, and the results showed that the flexural strength (FS), elastic modulus (EM), compressive strength (CS), and microhardness (MH) of the modified resin composites were increased by 53.29, 47.8, 97.59, and 37.1%, respectively, with the addition of 0.8 wt % of BNN/DMA composite fillers. It has a good inhibition effect on Streptococcus mutans, with an inhibition rate as high as 90.43%. Furthermore, this effect persists even after one month of aging. In conclusion, the modification of flowable resins with low-concentration BNN/DMA composites favorably integrates the mechanical properties and long-term antimicrobial activity of dental resins. At the same time, they have good biocompatibility and do not affect the aesthetics. The BNN/DMA composite modified flowable resin has the potential to become a new type of antimicrobial dental restorative material.
研究领域:
牙科材料学
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纳米材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER COMPOSITES
·
2023
·Vol. 44
·期 5
·2966-2976
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IF 5.2
Xudong Wu,Haojie Yu,Li Wang,Xingguang Meng,Zhikun Huang,Xiaowei Liu,Xiaodan Gong,Jinyi Liu
High thermal conductive polymeric composites are extremely desired for the thermal management of electronic devices due to the rapid development of the modern microelectronic industry. Herein, the functionalized boron nitride (BN) and magnesium oxide (MgO) hybrid fillers (f-BN@f-MgO) were synthesized and used to prepare the enhanced thermal conductive epoxy (EP) composites through the hot-pressing method. The results demonstrated that the covalent binding of BN and MgO in the hybrid fillers reduced the interface thermal resistance effectively between fillers and matrix and the hot-pressing induced force facilitated the construction of the continuous thermal conduction paths. Consequently, the as-prepared epoxy composite at 40 wt% hybrid fillers loading had high thermal conductivity (TC) (1.97 W/[m·K]), outstanding insulating performance (6.9 × 10 15 Ω cm) and excellent thermal stability. Furthermore, a probable thermal conduction mechanism was proposed to illustrate the high TC of the epoxy composite. Therefore, this study provides a new approach to preparing epoxy composites with outstanding performances.
研究领域:
材料科学
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热工程
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高分子科学
·
电子学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 59
·88894-88907
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IF 5.19
Ai Weidong,Li Yongtao,Zhang Xuejian,Xiao Liguang,Zhou Xiaoqi
Coal gasification fine slag is a by-product of the entrained-flow gasifier, which has caused some environmental pollution. Through acid dissolution and calcination at different temperatures, mesoporous spherical silica/porous carbon composite filler was prepared using coal gasification fine slag. The particle size and specific surface area of the composite filler decreased with the decrease of unburned carbon content. The analysis of X-ray photoelectron spectroscopy (XPS) indicated the decrease of oxygen-containing functional groups and the increase of C–C groups with the decrease of the content of carbon. The effects of mesoporous spherical silica/porous carbon with different carbon content on the comprehensive properties of filled polypropylene (PP) were studied. The tensile strength and interface interaction increased at first and then decreased with the decrease of carbon content, due to the synergistic effect of mesoporous spherical silica and rough amorphous carbon. The scanning electron microscope showed that the composite filler with the carbon content of 14.47 wt.% at the calcination temperature of 450 °C had the best compatibility with the matrix. Thermodynamic analysis of the PP composites indicated that thermal insulation properties and thermal stability improved with the incorporation of the composite filler. Differential scanning calorimetry (DSC) testing indicated the highest crystallinity of the matrix corresponding to the best comprehensive performances of the composites. XRD patterns revealed that the cooperation of fillers brought characteristic peaks and did not change the primary crystal structure of PP. Simultaneously, heavy calcium powders (CC) were used as comparative fillers, and the overall properties of the PP composites filled with the composite filler were better compared to those of the CC-filled PP composite. The results illustrated that mesoporous spherical silica/porous carbon particles can completely replace CC used in the PP composites, which can be used in auto bumpers, plastic pipes, display cases, and car air deflectors. The CGFS can be processed into a plastic filler for substituting heavy calcium powder particles, which can solve the environmental pollution caused by the accumulation of solid waste. Graphical abstract
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Weiwei Fan,Qiang Gao,Zhonghui Wang,Jun Xiang,Huan Wei,Haojun Fan
In this work, a type of modified aluminum oxide-titanium dioxide composite filler (MAT) was employed as a high refractive index and wide electron band gap filler and incorporated into reversible cross-linked polyurethane (RCPU) with disulfide bonds to prepare passive radiative cooling coating. After modification by a 3-isocyanatopropyltrimethoxysilane coupling agent, the urethane and siloxane chains were found to covalently bond between aluminum oxide and titanium dioxide, which imparts the MAT filler a good dispersion level in the RCPU matrix. The as-prepared RCPU-MAT10 coating with 10 wt % of the MAT filler possessed desirable solar reflectance and thermal emittance in atmospheric transparency windows of 0.874 and 0.977, respectively, resulting in a subambient daytime cooling of 8.7 °C (solar light irradiation is 814 W/m2) and a nighttime cooling of 4.2 °C under outdoor environments. Taking advantage of the dynamic exchange feature of disulfide bonds, RCPU-MAT10 exhibited good recyclability behavior under heating (100 °C) for 10 min. More encouragingly, the recycling efficiency in passive radiative cooling performance for RCPU-MAT10 still remained above 95% after three cycles.
研究领域:
材料科学
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环境科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）