APPLIED CLAY SCIENCE
·
2020
·
IF 4.605
Sheng Wang,Hengdong Ren,Wei Lian,Jiangzhe Wang,Yan Zhao,Yin Liu,Tianshu Zhang,Ling Bing Kong
The effect of ball-to-powder weight ratio on the crystal composition, microscopic morphology and pore structure of palygorskite was systematically studied by using the conventional wet ball milling process. The quartz can be effectively separated from palygorskite through low-speed centrifugal treatment in aqueous solutions, while the strength of ball milling has a significant influence on disaggregation degree of the crystal bundles. When the ratio is 1:2, the rod crystal bundles are well dissociated, while preserving the inherent aspect ratio of the nanofibers. After the treatment, the specific surface area, micropore volume and micropore area are increased from 206.87 m 2 /g, 0.0347 cm 3 /g and 76.07 m 2 /g to 255.03 m 2 /g, 0.0502 cm 3 /g and 109.42 m 2 /g, respectively. For the first time, the purified palygorskite was used as a template to prepare palygorskite/Fe 3 O 4 nanocomposite using by hydrothermal method , for microwave absorbing applications. As expected, the introduction of palygorskite can effectively prevent the aggregation of the Fe 3 O 4 magnetic particles. Meanwhile, the specific surface area of the composite is enlarged from 10.29 m 2 /g to 40.73 m 2 /g, as the weight ratio of Fe 3 O 4 and palygorskite is 2:1, thus leading to enriched interface polarizations and hence resulting in a maximum reflection loss (RL) of −40.41 dB at 4.80 GHz, with effective absorption frequency that can be adjusted over 2–18 GHz by controlling thickness of the composite.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yanfang Sun,Peng Sun,Shixin Niu,Boxiong Shen,Honghong Lyu
Obstacles such as aggregation and low activity of micron zero-valent iron in pollutant treatment could be overcome by sulfidation and biochar support. Ball milling is a promising method for the preparation of iron-based composites but the milling atmosphere is critical. To maximize the reactivity and identify the effects of ball mill atmosphere, ball milling technology under wet and dry atmosphere was applied to prepare composites from mZVI, Na 2 S 2 O 4 , and pine wood biochar (BC) for Cr(VI) removal. The results showed that S-mZVI/BC-wet was highly dispersible with more FeS 2 coverage and thus more efficient on Cr (VI) removal than S-mZVI/BC-dry (99.9 % removal in 80 min vs. 87.9 % removal in 24 h) at the optimum Fe: C mass ratio (1:1), S: Fe molar ratio (1:10), and reaction conditions. Cr(VI) was adsorbed by a spontaneous, endothermic mechanism that combined physisorption and chemisorption. The reduction process was vulcanization efficiency and iron cycle dependent. Reduction outperformed adsorption on the Cr(VI) removal and high reduction rateswere electron-selectively related (59.15 % for S-mZVI/BC-wet and 46.72 % for S-mZVI/BC-dry), implying S-mZVI/BC-wet was more capable. S-mZVI/BC-wet presented excellent anti-ageing property and slightly inferior regeneration performance. In conclusion, the composite prepared by wet ball milling have excellent performance in rapid and complete removal of Cr(VI), and S-mZVI/BC-wet has superior potential in acidic wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Horizons
·
2023
·Vol. 10
·期 8
·3051-3060
·
IF 13.3
Gaojie Han,Bing Zhou,Zhaoyang Li,Yuezhan Feng,Chuntai Liu,Changyu Shen
Aramid nanofibers (ANFs) with a nanoscale diameter, large aspect ratio, and exposed electronegative surface, as well as ultrahigh thermal/chemical inertness and extreme mechanical properties, provide promising applications in many emerging fields, but these are greatly limited by the low preparation efficiency and broad diameter distribution. Herein, we put forward a high-efficiency wet ball milling-assisted deprotonation (BMAD) strategy to rapidly prepare ANFs with an ultrafine diameter. The strong shear and collision forces from ball-milling induced stripping and splitting effects on the macroscopic fibers, which promoted the penetration and expanded the contact interfaces between reactants, thus accelerating the deprotonation reaction and refining the ANF diameter. As a result, ultrafine ANFs with a diameter of only 2.09 nm and high concentration (1 wt%) were successfully achieved within 30 min. This BMAD strategy represents a vastly advantageous approach compared to the existing reported ANF preparation approaches in terms of efficiency (20 g L−1 h−1) and fiber diameter. The ultrafine microstructure leads to the corresponding ANF nanopaper having more compact stacking and fewer defects, thus exhibiting extraordinary mechanical properties including tensile strength (271.7 MPa) and toughness (33.1 MJ m−3). This work achieves significant progress toward high-efficiency production of ultrafine ANFs, bringing about appreciable prospects in preparing promising multifunctional ANF-based materials.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 12
·9543-9549
·
IF 2.22
Liu Wanying,Zhu Yabo,Xu Xiang,Wang Shasha,Zhang Xinxi
The wet ball milling (WBM) method is, for the first time, used for the exfoliation of bulk black phosphorus (BP) to obtain few-layer black phosphorus (FBP). Before that, the rational solid–liquid ratio of raw material is determined to be 1:1 (mg/mL) for the popular ultrasound liquid exfoliation (ULE). Obviously, the high proportion of organic solvent used in ULE will lead to serious environmental pollution. Compared with ULE, the solid/liquid ratio for WBM exfoliation is 100:1 (mg/mL) showing its advantage of less demand for organic solvent. In addition, different types of organic solvents are used to determine the proper organic solvent for WBM exfoliation. Ultraviolet–visible–near-infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and laser particle size analyzer are used to comprehensively characterize the layer numbers, morphology size, and phase structure of FBP yielded by WBM exfoliation. The results show that dimethyl sulfoxide (DMSO) is the suitable organic solvent for BP exfoliation; FBP flakes with 3–5 layers and micron size are obtained by WBM exfoliation.
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2019
·
IF 6.669
Jianqiang Chen,Yang Yu,Jiangang Han,Ying Guo,Zhen Yang,Qianqian Shang,Chengguo Liu
Esterification of lignocellulosic biomass driven by dry ball-milling suffered from agglomeration of lignocellulosic matters during milling process. In this study, esterification of waste mulberry wood (MW) was carried out by wet ball-milling with water and tetrabutylammonium fluoride (TBAF) to prepare all-wood-plastic composites. Under the same condition, the esterification of MW by wet ball-milling with TBAF presented higher efficiency than that without TBAF which was attributed to catalytic function of F − ions meanwhile the binding of TBA + to cellulose fibrils hindered the compaction of fibrillated fragments. Pre-ball-milling of MW for 4.0 h apparently promoted the esterification with succinic anhydride. All-wood-plastic composites prepared after 7.0 h succinoylation demonstrated prominent mechanical performance due to strong adhesion of fragments and matrix. This study is supposed to provide an environment-friendly method for efficient conversion of waste lignocellulosic biomass.
研究领域:
生物质转化
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xueyang Liu,Zengkai Huang,Hua Ma,Jingxian Wang,Shiwen Yang,Yingbin Jia,Qingquan Tang,Luoxin Wang,Hua Wang,Siwei Xiong
As a building block unit, the thermotropic liquid-crystal polyarylate (PAR) nanofibers are expected to offer a more diverse and efficient processing model compared to that of the lyotropic liquid-crystal polymer nanofibers through their thermoplastic process. However, there is currently a lack of literature documenting the preparation method of PAR nanofibers. In this study, we successfully fabricated representative thermotropic liquid-crystal polymer nanofibers, namely, PAR nanofibers, employing a wet ball-milling technique. By investigating the aggregated state structure, microscopic morphology, and surface energy of PAR under different treatment conditions, we elucidated the underlying mechanisms governing the generation and dispersion of PAR nanofibers. The prepared PAR fibers could reach 155.2 nm in diameter and exhibited a notable aspect ratio; the observed lengths of these fibers exceeded 15 μm, with aspect ratios surpassing 96.7. Prior to reaching a temperature of 400 °C in a nitrogen atmosphere, the PAR nanofibers did not display significant weight loss, indicating excellent thermal stability. Furthermore, the PAR nanofiber membranes displayed exceptional mechanical properties, with a tensile strength reaching 139.1 MPa.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xiaoqing Du,Yufan Zhou,Qiqi Zhou,Qi Chen,Qidi Zhang,Wangjie Xu,Yulin Zhan,Man Jiang
The efficient and structure-protective isolation of the main components of lignocellulosic biomass remains challenging for value-added utilization. In this study, we used corn straw waste, a vast yet underexplored biomass from agricultural residues, as the raw material to extract high-purity cellulose nanosheets and recycle the lignin components as well-defined lignin nanotubes (LNTs) in a tandem process. The process consisted of a feasible dilute alkali-assisted wet ball milling treatment of steam-exploded corn straw into high-purity cellulose nanosheets and a lignin solution, which was further transferred into LNTs by a molecular assembly method. Purity, morphology, chemical structure, and thermal behavior of high-purity cellulose nanosheets and LNTs were examined. The 98.9 wt% purity of the high-purity cellulose nanosheets was achieved with a crystallinity of 36.9 %, providing a solid foundation for further chemical modification. The LNTs exhibited remarkable antioxidant activity, opening new avenues for the development of lignin-based functional materials and fundamental research.
研究领域:
材料科学
·
生物质化学
·
纳米技术
✓ 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）