INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Meihong Liu,Junye Wang,Qiming Yan,Jianxiong Lyu,Yafang Lei,Shaoyi Lyu,Li Yan
Furfuryl alcohol (FA) modification represents a sustainable approach to wood modification; however, it significantly reduces the toughness of the wood, limiting its practical applications. This study introduced epoxidized linseed oil (ELO) as an environmentally friendly and bio-derived plasticizer to enhance the toughness and mechanical properties of FA-modified wood. Microstructural analyses confirmed the integration of FA and ELO into the cellular structure of the wood. The chemical interactions between the epoxy groups of ELO and hydroxyl groups of FA were characterized using Fourier-transform infrared spectroscopy and nuclear magnetic resonance spectroscopy , illustrating that a ring-opening reaction occurred that grafted the long flexible aliphatic chains of ELO onto the FA chains, thereby enhancing the chain mobility and flexibility. This interaction significantly decreased the crosslinking density, thereby achieving toughening. FA–ELO modification resulted in significantly enhanced dimensional stability and mechanical properties. Specifically, the anti-swelling efficiency exceeded 80 %, while the modulus of elasticity , modulus of rupture, and along-grain compressive strength increased by up to 35.0 %, 36.8 %, and 45.7 %, respectively. Additionally, significant enhancements in the elongation at break and impact strength were achieved, at 369.1 % and 72.4 %, respectively. The loss factor also increased. The optimal ELO content was 20 wt%. This study effectively demonstrated how ELO mitigates the brittleness of FA-modified wood and supports its application in high-value fields such as construction.
研究领域:
材料科学
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林学
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化学工程
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产品关联
DOI
高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 14
·9309-9321
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IF 5.044
Zhao Xiaobin,Wang Wenbo,Huang Chenghao,Luo Lei,Deng Zhongmin,Guo Wei,Xu Jie,Meng Zhenghua
Cattail is widely abounding in wetlands and marshes and is usually considered as an abundant and inexpensive biomass lignocellulose resource due to its rapid growth. In this paper, a novel cellulose (named as TOCF) separator for Li-ion batteries (LIBs) is successfully fabricated from cattail fibers by 2, 2, 6, 6-tetramethylpiperidine-1-oxyl (TEMPO) oxidation and vacuum filtration. The proposed TOCF membrane shows good tensile strength (75 MPa), superior thermal dimensional stability, sufficient porosity (64.8%), outstanding liquid electrolyte uptake (323%) as well as large ionic conductivity (2.83 mS cm −1 ). Moreover, the Li/LiFePO 4 cell assembled using the TOCF separator demonstrates better discharge capacity and cycling stability than the cell with a commercial Celgard separator. Thus, the TOCF separator is a promising and low-cost candidate used in high-performance LIBs.
研究领域:
材料科学
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能源技术
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Huiqin Fan,Yong Xu,Fei Zhao,Qing-Bai Chen,Di Wang,Jianyou Wang
Ion exchange membranes (IEMs) are widely used in various electrochemical fields. Generally, identifying a solution for the trade-off between ion conductivity and dimensional stability is crucial for the further development of IEMs in the electrodialysis (ED) process. This study aimed to prepare a novel type of cation exchange membrane for electrodialysis desalination. Different from the previous cation exchange membranes with the thick and dense cross-section structure, the as-prepared asymmetric composite membranes in the present work composed of a thin and dense skin layer and a porous support layer via the pore-filling process of the skin layer of the porous poly (ether sulfone) (PES) membrane. Benefiting from such structural features, effective ion transport and dimensional stability were simultaneously achieved in the case of low ion exchange capacity. Ultimately, the optimal sulfonated poly (ether sulfone)-poly (ether sulfone) (SPES-PES) composite membrane simultaneously achieved ion transport enhancement, low swelling rate at 80 °C, and better mechanical stability compared to pure sulfonated poly (ether sulfone) (SPES) membranes. When applied to ED, the prepared 40 %SPES-PES membrane exhibited more excellent desalination performance (91.9%), higher current efficiency (127.5%), and lower energy loss (5.55 Kw·h·kg −1 ) compared to commercial membrane.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
·
IF 6.76
Yuan Jin,Xiu Zhang,Tianci Feng,Meisheng Li,Huifang Xiao,Shouyong Zhou,Yijiang Zhao,Jing Zhong,Dawei Yang
Low ion conductivity and poor alkali resistance are still the two major obstacles for the applications of anion exchange membranes (AEMs). In this work, the combined strategies of Carbon quantum dots (CQDs) hybrid and cross-linking modification via side-chains designing were employed to prepare organic–inorganic hybrid AEMs. Then, the cross-linked quaternized polysulfone (CQPSf-CQDs) hybrid AEMs by incorporating carbon quantum dots were successfully fabricated. After hybrid and cross-linking, the mechanical properties of CQPSf-CQDs hybrid AEMs were higher than that of the pristine one, reaching 49.4 MPa for the best one. Meanwhile, the existence of CQDs can expand the hydrophilic area in the membrane, which is beneficial to the transport of O H - . The incorporated CQDs interact weakly with cationic groups in the side chains through hydrogen bonds. The simulation results further demonstrated that the introduction of CQDs was beneficial to the construction of hydrophilic and hydrophobic domains, thereby increasing O H - conductivity. In addition, the prepared hybrid membranes own excellent dimensional stabilities and ion transport performances. These preliminary results give us a lot of hopes for further experiments and optimizations for the hybrid AEMs.
研究领域:
材料科学
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高分子化学
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膜科学与技术
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电化学
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能源材料
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
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IF 5.6
Xunwang Tang,Zongxue Yu,Junlei Tang,Guangcheng Yang,Xiuzhu Zhang,Yu Chen,Jiajia Hou,Hongye Xu,Jianjun Wu
The development of anion-exchange membrane water electrolyzers (AEMWE) offers significant potential for sustainable hydrogen production, but the practical adoption of anion exchange membranes (AEMs) is hindered by their inherent performance limitations. To overcome this challenge, we developed a series of poly (biphenylene-co-1,2-diphenylethane) piperidine AEMs featuring grafted hydrophobic fluorinated side chains by precisely controlling the grafting rate. The fluorinated side chains not only promote microphase separation and reduce ionic conduction resistance, but also significantly enhance the dimensional stability of the AEMs. Specifically, the QPBDP-TF-40 membrane exhibits good ionic conductivity (163.6 mS cm −1 at 80 °C), and with increasing grafting rate the QPBDP-TF-80 membrane exhibits low swelling rate (16 % at 80 °C). QPBDP-TF-60 shows good chemical stability with ionic conductivity retention of 78.3 % after 1000 h immersion in 2 M NaOH solution at 80 °C. In addition, the membrane electrode assembled based on QPBDP-TF-40 membranes exhibits considerable current density in AEMWE (1.36 A cm −2 achieved at 2.1 V) and stable operation at a current density of 500 mA cm −2 for 72 h. The above results indicate that fluoride-grafted QPBDP-TF-X exhibits a large potential for application in AEMWE.
研究领域:
材料科学
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能源工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Ziliang Li,Li Gao,Xuemei Wu,Xiaobin Jiang,Xiangcun Li,Wu Xiao,Wanting Chen,Wenji Zheng,Xuehua Ruan,Xiaoming Yan,Gaohong He
The advancement of the ionic conductivity and dimensional stability of anion exchange membranes (AEMs) while ensuring excellent alkali stability is the critical challenge in the development of AEM fuel cells. Construction of efficient ion transport channels through well-designed microphase morphology is considered to be an effective strategy to achieve this goal. Herein, we propose an ingenious design that a novel aryl ether-free poly(phenyl-alkane)s-based AEMs to optimize the conductivity and longevity of AEMs using rigid aryl units, i.e., 1,4-dimethoxybenzene and spirobisindane, as the main chains with connecting flexible alkyl chains. The rigid and non-rotatable aromatic structure can facilitate the formation of a well-defined microphase separation structure with long chain quaternary ammonium by reducing chain segment interactions, and can also ameliorate the dimensional stability of the membrane. Consequently, the as-prepared membrane exhibits an excellent hydroxide conductivity of 130 mS cm −1 at 80 °C and approaches a terrific conductivity retention rate of 90 % after immersion in 1 M NaOH solution at 80 °C for 1000 h. Furthermore, the as-prepared membrane achieves an excellent peak power density of 1.36 W cm −2 in the H 2 -O 2 fuel cell and its initial voltage shows no signs of decreasing after running for 20 h under 0.2 A cm −2 .
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
Heritage Science
·
2024
·Vol. 12
·期 1
·1-9
·
IF 2.6
Liu Jiaojiao,Dong Wenqiang,Yang Junchang,Chen Zhongwei,Cao Jing,Chen Ran
Owing to the instability of gelatine in hygrothermal environments, gelatine-based cultural heritage undergo various deterioration processes, such as cracking, peeling, warping, curling and fracture, posing significant threats to its long-term preservation. Building on previous research, this study investigates the stability of polyol glycidyl ether–gelatine composite films under high-humidity and high-temperature conditions using ethylene glycol diglycidyl ether (EGDE) as a model compound. The hygrothermal ageing properties of EGDE–gelatine composite films are evaluated in terms of macrosize, mesoscopic structure, surface properties and mechanical properties. Results indicate that EGDE enhances the dimensional stability and swelling ratios of the composite films, stabilizes the pore structure and distribution and maintains the hydrophilicity and molecular structural stability under hygrothermal ageing conditions. Furthermore, the incorporation of EGDE leads to superior stress–strain properties of the composite films in such challenging environments. This study provides valuable experimental data for the preparation and conservation applications of gelatine-based cultural heritage materials.
研究领域:
材料科学
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文物保护
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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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2024
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IF 5.1
Jincheng Zhang,Liyan Xue,Wei Zhang,Yanyu Pan,Hongye Wang,Kaixian Wang,Heng Chen,Minzhong Huang,Fan Yang
Materials with high-temperature dimensional stability and resistance to radiation damage are receiving increasing attention in advanced nuclear energy systems . In this research, (Sm 0.2 Eu 0.2 Gd 0.2 Dy 0.2 A 0.2 ) 2 W 3 O 12 -type (A = Y, Tm,Ho) high-entropy ceramics is presented. The coefficients of thermal expansion of (Sm 0.2 Eu 0.2 Gd 0.2 Dy 0.2 Y 0.2 ) 2 W 3 O 12 (HE-RE 2 W 3 O 12 ) is 7.21 × 10 −6 K −1 at 300–1100K, which is the lowest among the three synthesized high-entropy ceramics and indicates good dimensional stability at high temperatures. After irradiation with Kr + fluence of 4.58 × 10 16 ions/cm 2 at 400 °C, both HE-RE 2 W 3 O 12 and Gd 2 W 3 O 12 maintained crystalline, but the lattice volume expansion rate of HE-RE 2 W 3 O 12 (0.71 %) is much lower than that of Gd 2 W 3 O 12 (1.49 %). Additionally, in the post-irradiated HE-RE 2 W 3 O 12 , the Raman spectra vibration peak remained unchanged and no radiation-induced segregation was observed. Nanoindentation tests displayed that the degradation of hardness and elastic modulus in HE-RE 2 W 3 O 12 is rarely degrade. Overall, these results provide new insights for research on advanced nuclear materials in the future.
研究领域:
材料科学
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核能工程
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DOI
高影响因子
APPLIED CLAY SCIENCE
·
2020
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IF 4.605
Yufei Yuan,Cuiyan Tong,Changli Lü
ABSTRACT The low ionic conductivity and poor dimensional stability severely influence the application of anion exchange membranes (AEMs). Therefore, how to balance the problem of excessive swelling of polymer matrix caused by increasing ion conductivity becomes an important challenge. Herein, 3-(dimethylamino)-1- propylamine (DMAPA) and polyethyleneimine (PEI) were grafted to the surface of layered double hydroxide (LDH) through mussel-inspired chemistry. The sheet-like functionalized LDH (DLDH and PLDH) as both filler and crosslinker was incorporated into the quaternized fluorenyl-containing polyethersulfone (QPFSU) matrix to get a series of new composite anion exchange membranes (AEMs). The as-prepared micro-crosslinked AEMs were found to form more hydrophilic conductive ion clusters owing to the generation of new quaternary ammonium groups during the crosslinking reaction. The micro-crosslinked AEMs have better dimensional stability while having higher OH − conductivity. Especially the ion conductivity of CQPFSU-1%-PLDH membrane can reach 86.8 mS cm −1 at 80 °C with excellent dimensional and chemical stability (SR is 9.6% at 80 °C, 21.8% decrease in OH − conductivity at 60 °C in 1.0 M NaOH for 200 h). Overall, the micro-crosslinking method for functionalized LDH modified AEMs achieves a balance between ion conductivity and dimensional stability of AEMs.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Jialin Zhao,Jian Gao,Yijia Lei,Jingyi Wu,Na Li,Yan Wang,Junjian Yu,Zhiyan Sui,Jiayao Yang,Zhe Wang
In this work, the polymerization of hydrophobic pentafluorophenylethyl into the high conductivity poly (acenaphthenyl aryl piperidinium) backbone was catalyzed by an efficient and facile one-pot method with super-strong acids to build enhanced phase separation structures while maintaining low swelling. The prepared QPANTP-20-F 15 membrane exhibited the most significant hydrophilic-hydrophobic separation phenomenon, with the conductivity as high as 192.19 mS cm −1 at 80 °C. Due to the incorporation of hydrophobic fluorinated groups, the water uptake of the membrane was limited, and its mechanical (71.0 MPa under hydrated condition) and dimensional stability property (11.32% swelling) showed improved results. In addition, after 1200 h at 80 °C in 3 M/5 M NaOH solution, the structure of the prepared polymer exhibited excellent chemical stability property, with conductivity remaining of 95.04% and 86.38%, respectively. With current density of 706 mA cm −2 at 80 °C, the AEMFCs achieved a peak power density of 321 mW cm −2 .
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2025
·
IF 9.1
Yanchao Zhang,Yiman Gu,Zhanyu Li,Shiyao Sun,Xiangwei Li,Baozeng Sun,Xiaoyu Yu,Zhe Wang
The anion exchange membranes (AEMs) face many challenges, and drawbacks such as poor alkali resistance stability, low ionic conductivity, and poor dimensional stability have hindered widespread applications. Herein, a series of fluorinated poly(aryl-piperidine) anion exchange membranes (QPTPF 6 D-x) containing flexible biphenyls (1,2-diphenylethanes) were successfully prepared by using an ultra-strong acid-catalyzed polycondensation reaction. Flexible biphenyl is an aromatic monomer containing a collapsible rotary alkyl chain. It promotes the aggregation of piperidinium cationic groups and the construction of a more obvious microphase separated structure with fluorinated groups, effectively improving the conduction. At 80 °C, the ionic conductivity of QPTPF 6 D-25% AEM reached 151.02 mS cm −1 . Incorporation of hydrophobic fluorinated groups and rigid aryl rings to maintain high mechanical properties (above 40 MPa under hydrated condition) and low swelling ratio (below 22.69%). Ether-free main-chain type AEMs were prepared to have better alkali resistance, and QPTPF 6 D-25% AEM was soaked in 2 M NaOH for 1800 h, and the ion retention rate remained above 95%. In addition, the QPTPF 6 D-25% AEM's peak power density (PPD) was 616.93 mW cm −2 under 100 % RH and 1.75 bar test conditions. Meanwhile, the advantages of introducing flexible biphenyl and fluorinated groups were confirmed by density functional theory (DFT).
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2019
·
IF 0
Tao Xu,Hang Li,Chao He,Hao Xu,Xin Song,Haifeng Ji,Changsheng Zhao
Wastewater containing positively-charged toxins and pathogenic bacteria can cause high environmental danger which seriously threatens human health. Fixed-bed column has emerged as a practical technique for water remediation owing to its simple operation, high efficiency and cost-effective implementation. However, how to prepare adsorbents with adequate dimensional stability, high adsorption capability and antibacterial property remains an open question. Herein, semi-interpenetrating network (Semi-IPN) microspheres were prepared by combining poly (ether sulfone) with poly (acrylic acid) (PAA) hydrogels via electrospraying technique coupled with subsequent in-situ cross-linking polymerization. Then, Ag nanoparticles were immobilized on the PAA hydrogels to endow the microspheres with antibacterial property. The as-prepared multifunctional microspheres exhibited superior dimensional stability. The compressive stress of the microspheres reached up to 17.90 MPa (with a strain of 60%), which was over 400-fold larger than that of the PAA hydrogels. The swelling ratio of the microspheres under pH 10 was 1.75 g/g and declined by 90.17% compared to that of the PAA hydrogels. Furthermore, the column filled with the microspheres showed ultrahigh removal ratios for positively-charged toxins (98.03%, 99.57%, 99.42% and 98.21% for methylene blue, Cu 2+ , Cd 2+ and Pb 2+ , respectively) and robust bacterial killing efficiency (100% for either Escherichia coli or Staphylococcus aureus ). Overall, we present a method on developing promising multifunctional hydrogel microspheres with enhanced antibacterial activities as well as adsorbent with higher adsorption capacities. We envision that the proposed multifunctional microspheres could overcome the limitations facing the fixed-bed column and be applied for treatment of water polluted by positively-charged toxins and pathogenic bacteria.
研究领域:
环境科学
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材料科学
·
生物学
✓ 已验证
DOI
危险品化学品经营许可证（带存储）