JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 7
·1-12
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IF 2.8
Zhang Xinle,Chi Qingguo,Tang Chao,Li Hua,Zhang Changhai,Li Zhonghua,Zhang Tiandong
The rapidly growing third-generation wide-band-gap semiconductor electronic device industry urgently requires high-temperature-resistant packaging materials. However, the epoxy molding compound materials cannot suffer the high-temperature working condition due to the intrinsic molecular chain structure of epoxy materials (EP). In this paper, bisphenol A-type cyanate (BADCy) with triazine ring structure was introduced into EP to improve its heat resistance. The curing reaction as well as the curing mechanism has been clearly revealed for BADCy/EP with different contents of BADCy according to the Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimeter (DSC) results. In the whole copolymer system, the copolymer at higher BADCy concentration (50–60 mol%) achieved the highest crosslink density (12.8 × 10 –3 mol/cm 3 ), thus, showing excellent glass transition temperature (> 200 °C) and thermal decomposition temperature( T 5% > 400 °C). The heat resistance and electrical insulation property of BADCy/EP system have been systematically investigated, and a balance between high heat resistance and good electrical insulation are achieved at 66 mol% BADCy content, where the glass transition temperature reaches 215 °C, which is 73 °C higher than that of the EP system of anhydride copolymer. The volume resistivity of 1.5 × 10 15 Ω·m and dielectric constant of 3.3 is obtained, indicating excellent electrical insulation and dielectric properties of BADCy/EP. This work provides a facile and efficient strategy to improve the overall properties of EP by optimizing the molecular chain structure.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Hongjian Gu,Cheng Liu,Qian Liu,Hang Jia,Yue Qiao,Wenqi Zhao,Yousi Chen,Xigao Jian
High-performance polymers that are both high temperature resistant and soluble is significant for the development of high-tech fields. 4,4′-(Thiobis(4,1-phenylene))bis(phthalazin-1(2H)-one) (T-BDHPZ) monomer is synthesized by an efficient two-step method using inexpensive phenyl sulfide and phthalic anhydride as raw materials. A series of novel poly(bisphthalazinone thioether sulfone ketone)s (PBPTSKs) were synthesized via aromatic nucleophilic substitution polycondensation. The structures of PBPTSKs were characterized by NMR and FT-IR. These polymers have glass transition temperatures ( T g s ) in the range of 302–328 ℃, and are soluble in N -methyl-2-pyrrolidone (NMP), pyridine (Py) and 1,1,2,2-tetrachloroethane (TECT), and partially soluble in N , N -dimethylacetamide (DMAc), N , N -dimethylformamide (DMF), dichloromethane (DCM), trichloromethane (TCM) and pyridine. PBPTSK films were prepared by solution casting, and the average light transmittance from 400 to 800 nm of films are all over 70%. PBPTSK boards prepared by hot press molding have outstanding mechanical properties with the tensile strength and the flexural strength of 91–102 MPa and 123–135 MPa, respectively. PBPTSK boards also exhibit excellent high- and low-temperature resistance properties at 290 and −60c, respectively. Moreover, these polymers with bisphthalazinone thioether moiety have outstanding inherent flame retardancy, which pass the V-0 level of the UL-94 test. This provides opportunities to develop high-performance polymers that are both high temperature resistant and soluble, showing great prospects in frontier applications.
研究领域:
材料科学
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化学工程
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产品关联
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 9
·4986-4994
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IF 2.047
Cao Zhangyi,Xie Xi,Chen Xin,Yu Jiaqi,Liu Xiukun,Huang Yuanxing,Xu Xu,Lu Shaorong,Li Yuqi
The high wear and temperature resistance of electrode materials are the key issues to extend the application of triboelectric nanogenerators (TENG). The synergistic effect of Fe 3 O 4 and ionic liquid-modified graphene (IGNs) were used to enhance the wear resistance, heat resistance, and mechanical properties of polyimide (PI). Then, the output performance of the PI-based TENG in contact–separation mode was tested. The results show that the tensile strength and thermal decomposition temperature of the IGNs/Fe 3 O 4 /PI composites (2F2G) d increased by 57 MPa and 23°C, respectively, due to the synergistic effect of IGNs and Fe 3 O 4 . In addition, the friction coefficient and wear rate of the 2F2G decreased by 21% and 14%, respectively. The open-circuit voltage, short-circuit current, and peak power density of the 2F2G-based TENG were 65 V, 2.48 μA, and 1.34 W/m 2 at 1 Hz, respectively. Owing to the high wear and temperature resistance of the 2F2G, the 2F2G-based TENG has a broad application prospect in the fields of wear- or high-temperature-resistant energy harvesting and self-powered sensors. Graphical Abstract
研究领域:
材料科学
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能源技术
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纳米科技
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Jiangtao Li,Yunjia Xue,Xueying Zhang,Fan Zhang,Wenhao Hu,Jiachen Liu
The SiC-ZrO 2 coating was prepared on the surface of aluminosilicate ceramic fiber fabric (ASFF) to enhance the radiation heat dissipation. However, the Si-sol in the SiC-ZrO 2 coating caused the fiber to adhere together at high temperatures. The brittle fracture of the ASFF led to a deterioration in its temperature resistance. In this paper, an Al 2 O 3 interface was prepared on the surface of ASFF by spraying alumina precursor. The Al 2 O 3 interface prepared by 3.0 wt% alumina precursor was uniformly covered on the fiber surface. The flexibility of ASFF/Al 2 O 3 /SiC-ZrO 2 was maintained after static oxidation at 1300 °C for 1 h. The tensile strength of ASFF/Al 2 O 3 /SiC-ZrO 2 at 1200 °C were increased from 5 to 7 MPa to 21.35 ± 2.58 MPa. The Al 2 O 3 interface not only limited the direct contact between Si-gel and fiber, but also reacted with Si-gel to produce mullite at high temperature. The problem of fiber adhesion caused by Si-sol in ASFF matrix was solved. Additionally, the SiC-ZrO 2 coating reduced the surface temperature of ASFF rom 1700 °C–1300 °C. Combining the radiation performance of SiC-ZrO 2 coating and the isolation effect of the Al 2 O 3 interface, ASFF/Al 2 O 3 /SiC-ZrO 2 was able to operate continuously for 300 s under the 1700 °C butane-oxygen flame heating condition.
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高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Guofeng Yang,Wenlei Liu,Bingchao Feng,Wen Song,Maliang Zhang,Kunmei Su,Haiyang Yang,Zhenhuan Li
Polyphenylene sulfide (PPS) nonwoven filters are extensively utilized in industrial filtration processes because of their exceptional resistance to solvents and cost-effectiveness. However, the high temperature exhaust gases with strong oxidation can irreversibly corrode PPS nonwovens, and thus reduce their service life. Here, an oxidation-modified PPS (OPPS) nonwoven is reported that assembles excellent oxidation and high temperature resistance to achieve separation and filtration under extreme conditions. This OPPS nonwoven is resistant to oxidizing acid solutions and high temperatures up to 350 °C. In addition, the OPPS nonwoven does not melt when burned in a flame. Practical application tests demonstrated that the PM10–2.5 filtration efficiency of OPPS nonwoven reaches 90.4%, which is 20% higher than that of PPS nonwoven. Impressively, the OPPS nonwoven enables a PM10–2.5 filtration efficiency of 92.5% and 94.6% even after aging by 60% HNO3 solution and 350 °C, respectively. The cost-effectiveness and high performance of OPPS nonwoven present substantial advantages for flame retardant, thermal insulation, and dust filtration applications.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Chong Peng,Na Wang,Xinyi Huang,Mingwei Zhao,Siyu Yu
High-temperature-tolerant flexible supercapacitors are essential for powering emerging wearable and portable devices operating under harsh environmental conditions. Conventional hydrogel electrolytes exhibit excellent ionic conductivity, flexibility, and biocompatibility; however, their practical application is hindered by water evaporation at elevated temperatures and a narrow electrochemical window limited by the water decomposition voltage (1.23 V). In this work, we present a novel heat-resistant and redox-active hydrogel electrolyte containing a ZnCl2 water-in-salt solution and a redox-active additive of (NH4)2Fe(SO4)2. The strong coordination between Zn2+ ions and water molecules effectively suppresses water activity, thereby enhancing the thermal stability and expanding the electrochemical window. Furthermore, the incorporation of (NH4)2Fe(SO4)2 contributes to both faradaic charge storage through Fe2+/Fe3+ redox reactions and improved thermal stability via enhanced water coordination. When paired with KOH-activated carbon nanofiber electrodes, a redox electrolyte enhanced flexible supercapacitor has been constructed. The device delivers a wide working voltage of 2.0 V, a high energy density of 23.2 Wh kg–1, and stable operation across a broad temperature range from 0 to 100 °C. This work offers a promising strategy for developing high-performance, thermally stable energy storage devices suitable for next-generation flexible electronics.
研究领域:
储能
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材料科学
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电化学
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纳米技术
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柔性电子学
✓ 已验证
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DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 332
·期 4
·1135-1147
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IF 1.754
Lei Fuan,Zhang Weibo,Zhou Yun,Zhou Ningyuan,Liu Tonghuan,Shi Keliang,Wu Wangsuo,Gao Xiaoqing,Yang Junqiang
Developing novel adsorbents for efficient U(VI) adsorption from wastewater is of great significance in both nuclear energy development and environmental protection. Herein, a novel functional resin (AO67/MA33-resin) with large particle size (100–200 μm) was controllably synthesized and employed for U(VI) elimination. The AO67/MA33-resin overcomes the shortcoming of small particle size of traditional adsorbents and shows strong antacid and high-temperature resistance stability and reusability. Meanwhile, the AO67/MA33-resin also exhibits excellent U(VI) removal ability including wide pH adaptability, fast adsorption kinetic, and high adsorption capacity. The adsorption mechanism was determined to involve chelation between amidoxime carboxyl functional groups and uranyl ions. A further application for U(VI) removal from real uranium mine wastewater was evaluated by dynamic column experiments. The present work indicated that the AO67/MA33-resin would be a promising adsorbent material for uranium removal from wastewater.
研究领域:
环境科学
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核工程
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材料科学
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DOI
高影响因子
IONICS
·
2020
·Vol. 26
·期 9
·4489-4497
·
IF 2.394
Li Ling,Li Haijuan,Wang Yan,Zheng Shuaizhi,Zou Youlan,Ma Zengsheng
To improve the safety performance of lithium-ion batteries, the research of composite separator with high temperature resistance is one of the strategies. Herein, a poly(vinylidene fluoride-hexafluoropropylene)/cellulose/carboxylic titanium dioxide (PVDF-HFP/cellulose/C-TiO 2 ) composite separator is prepared by the phase inverse method. The composite separator has higher porosity (63.65%) and electrolyte uptake (210.3%) than PP separator, exhibiting good heat resistance that can keep its shape and size under 160 °C for 0.5 h. Additionally, it has a superior ionic conductivity of 1.24–1.49 mS cm −1 and a lower charge transfer impedance at a room temperature, which brings about better cycle and rate performance. Promisingly, the cell assembled with the PVDF-HFP/cellulose/C-TiO 2 composite separator has a high electrochemical working window and a high current charge of ability, and can undergo 10 charge-discharge cycles normally under 120 °C. The PVDF-HFP/cellulose/C-TiO 2 composite separator has promising potentials for high current and voltage charging, which can improve the safety performance of the lithium-ion battery.
研究领域:
材料科学
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电化学
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电池技术
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DOI
高影响因子
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