JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Yijie Wang,Guancheng Jiang,Qiannan Wang,Yinbo He,Lili Yang,Tengfei Dong,Xingxing Wang
In the development of deep shale oil and gas, the working temperature of the water-based drilling fluids is relatively high, which can cause wellbore instability due to the poor temperature resistance of the traditional environmental-friendly additives. To address this issue, this study presents a wellbore stabilizer called PMG, prepared by modifying gelatin (GT) with a resin synthesized by polyvinyl alcohol (PVA) and methacrylic acid (MA) through hydrothermal free radical polymerization, and it can withstand temperature up to 200 °C. The synthesis and thermal stability of PMG were confirmed by Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA). The wellbore stability performance of PMG was evaluated by linear swelling test, rolling recovery test, core immersion experiment and point load test and the wellbore stability mechanism was also investigated. The results reveal that the swelling height of sodium-based bentonite (Na-BT) in 2.0 % PMG solution at 150 °C is only 0.97 mm; the hot-rolling recovery rate in 2.0 % PMG solution at 200 °C is 72 %; the artificial core still maintains its original appearance after being immersed in 2.0 % PMG solution at 200 °C for 16 h, and the compressive strength increases by 12 %, effectively strengthening the wellbore. In addition, the EC 50 value of PMG is > 10 6 mg/L, and the BOD 5 /COD cr value is 31 %, indicating that it is non-toxic and biodegradable. PMG has excellent wellbore stability performance, in addition to being able to adsorb on the surface of Na-BT by electrostatic action and hydrogen bonding, the PMG micelles that precipitated from the aqueous solution due to the breaking of hydrogen bonds in the molecular chain at high temperature also form a film on the clay surface, aggregating and cementing the clay particles together, further enhancing the wellbore stability.
研究领域:
石油工程
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 32
·21085-21094
·
IF 10.7
Yafei Liu,Hao Sun,Ruifeng Wu,Aimin Chang,Bo Zhang
High ceiling temperature and the corresponding thermal stability are crucial to thermo-sensitive materials under extreme conditions. However, these features are often difficult to achieve simultaneously in conventional thermo-sensitive ceramics, thus becoming a key bottleneck restricting the development of thermo-sensitive ceramics in next-generation advanced high-temperature sensors. Here, for the first time, a (Ho0.2Er0.2Tm0.2Yb0.2Lu0.2)3NbO7 high-entropy ceramic is reported which possesses exceptional thermosensitive capability and high thermal stability. With the structure construction involving constraining a NbO6 octahedron by tailoring the lattice distortion and solving the stability degeneration caused by the tilt of the NbO6 octahedron and dipolar interactions of the off-centered Nb cations, the materials with highly dense lattice distortion dominated by symmetric tensile–compressive strains exhibit thermo-sensitive characteristics from 623 K to 1873 K. More importantly, the materials demonstrate exceptional thermal stability, with an aging coefficient of less than 1% after aging at 1873 K for 400 h. They also show an ultrahigh measurement accuracy (R2 as high as 999.92‰ and RSS as low as 0.071) maintaining excellent sensitivity at temperatures up to 1873 K. This work provides an effective way to design high-temperature thermosensitive ceramics with high ceiling temperature and high thermal stability to meet the demanding requirements of advanced high-temperature measurement applications.
研究领域:
材料科学
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传感器技术
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2020
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IF 6.146
Xiaona Liu,Yi Cao,Nana Yan,Chao Ma,Lei Cao,Peng Guo,Peng Tian,Zhongmin Liu
The high-temperature (HT) and low-temperature (LT) hydrothermal stabilities of molecular-sieve-based catalysts are important for the selective catalytic reduction of NO x with ammonia (NH 3 -SCR). In this paper, we report a catalyst, Cu 2+ loading SAPO-17, synthesized using cyclohexylamine (CHA), which is commercially available and inexpensive and is utilized in NH 3 -SCR reduction for the first time. After systematic investigations on the optimization of Si and Cu 2+ contents, it was concluded that Cu-SAPO-17-8.0%-0.22 displays favorable catalytic performance, even after being heated at 353 K for 24 h and at 973 K for 16 h. Moreover, the locations of CHAs, host–guest interaction and the Brönsted acid sites were explored by Rietveld refinement against powder X-ray diffraction data of as-made SAPO-17-8.0%. The refinement results showed that two CHAs exist within one eri cage and that the protonated CHA forms a hydrogen bond with O4, which indicates that the proton bonding with O4 will form the Brönsted acid site after the calcination .
研究领域:
催化化学
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环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Fei Zhao,Shouyang Zhang,Yao Guo,Qiang Song,Yeye Liu,Yameng Jiao,Caixiang Xiao,Qingliang Shen
High-temperature-resistant, high-strength, and lightweight multifunctional aerogels are urgently required for critical thermal management in harsh conditions, but balancing many factors is highly difficult. Zirconium carbide nanowires (ZrCnws) have received increasing attention due to their exceptional high-temperature stability. In this work, ZrCnws aerogels were prepared by freeze-drying and heat treatment methods without metal catalysts. The single ZrCnw shows a cylindrical structure with a smooth surface. The growth of ZrCnws relied on S-L-S mechanism. ZrCnws aerogels have a density of approximately 24.38 mg/cm 3 and low thermal conductivity of 33.8 mW/(m•K) at room temperature. ZrCnws aerogels have 74.88% height retention after 100 cycles of compression at 30% strain and exhibit a specific EMI SE of 1458.61 dB•cm 3 •g −1 in the X band. This work provides a feasible method for ZrCnws aerogels and verifies that the prepared ZrCnws aerogels have potential applications in the fields of thermal insulation and electromagnetic shielding.
研究领域:
材料科学
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物理学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Xiaoshan Zhang,Qiong Tian,Bing Wang,Nan Wu,Cheng Han,Xin Long,Yingde Wang
Ceramic fibers with combined properties of high flexibility, thermal stability and thermal insulation performance are attractive for use in extreme conditions. In this work, the porous SiZrOC ultrafine fiber (PSUF) composed of SiO 2 , ZrO 2 , SiO x C y and free carbon phases was firstly prepared by electrospinning technique. The resulting PSUF exhibited integrated properties of high flexibility and high-temperature stability. More importantly, comparing with solid SiZrOC fiber, the fancy porous structure made the thermal conductivity of PSUF decreased 16.6% to 0.141 W m −1 ·K −1 at 1000 °C. The successful fabrication of such flexible PSUF may provide a new approach to design high performance thermal insulators for high-temperature thermal insulation.
研究领域:
材料科学
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热力学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2020
·Vol. 24
·期 1
·99-109
·
IF 1.654
Liangliang Zhang,Chenyu Liu,Fugui Li,Weihong Qiao
With the development of high-speed railways, there is an increasing demand for high-efficiency and environmentally friendly high-speed rail exterior surface cleaning agents. Based on emulsification experiment, contact angle experiment, solvent solubility experiment, and decontamination effect, this article provides the initial formulation for basic high-speed rail surface cleaner and a variety of improved formulations for special environments. The initial formulation uses cetostearyl alcohol ethoxylate C 16-18 -EO 10 (O-10) and 2-propyl-1-heptano ethoxylate i-C 10 -EO 5 (XP-50) as surfactants, dipropylene glycol butyl ether as solvent, citric acid as chelating agent, benzotriazole (BTA), sodium benzoate (SB), and triethanolamine (TEOA) as corrosion inhibitors. Then it is confirmed that adding 3% sodium percarbonate to the initial formula can effectively clean stubborn dirt. Increasing the BTA mass fraction to 3%, TEOA to 12%, add linoleic acid 2%, aluminum corrosion inhibitor (CIA) 3%, and Antirust 316 3%, can significantly improve the high-temperature corrosion-resistant detergent. Controlling BTA concentration not exceed than 0.5%, and adding an appropriate amount of hydrotrope (such as sodium xylenesulfonate), can ensure that the detergent will not delaminate within 6 h at 60°C, which effectively prolong its high temperature stability. The performance test results show that both initial formula and the improved formula meet the basic requirements, but the improved formula shows better performance in terms of cleaning ability, high-temperature corrosion resistance or high-temperature stability.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Zhimei Wei,Zhefu Wu,Qing Su,Chuanren Zhu,Hongye Zeng,Xiaojun Wang,Shengru Long,Jie Yang
Particulate matter 2.5 (PM 2.5 ) pollution has severely affected human health. It is urgent and essential to remove PM 2.5 from sources of pollution. However, filtration at the source of pollution remains challenging because most filters are not resistant to high temperature. Therefore, a polysulfonamide with novel molecular structure nanofiber filter in this work was developed by electrospinning technology for high-efficient air filtration. The polysulfonamide with m-phenyl substituted segments was successfully synthesized by the results of 1H NMR spectroscopy and fourier transform infrared spectroscopy. Moreover, the polysulfonamide nanofiber filters (PNFs) demonstrated excellent mechanical strength (7.2 MPa), high filtration efficiency (99.5 %), low pressure drop (111 Pa) for PM 2.5 filter, significant thermal stability (300 °C), and excellent flame retardancy. Furthermore, the PNFs with beaded-structure had a lower pressure drop (59 Pa) because the microspheres increased the distance between the fibers. Therefore, the PNFs will have great potential in the fields of high-temperature exhaust gas filtration, water purification, and protein separation.
研究领域:
材料科学
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环境科学
·
医学
✓ 已验证
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2022
·Vol. 24
·期 8
·2101603
·
IF 4.122
Jianhong Dong,Yongshuai Xie,Lixin Liu,Zhezhe Deng,Wei Liu,Luyi Zhu,Xinqiang Wang,Dong Xu,Guanghui Zhang
Low density, heat-resistant sponge-like fiber assembly materials are considered as promising high-temperature insulation materials. However, the poor structural stability, infrared radiation heat transfer, and complex preparation process limit its further application. Herein, a facile method to create ultralow-density ZrO 2 –TiO 2 fiber sponges by the electrospinning method followed by heat treatment is presented. The layered structure sponges treated at 1200 °C have a low density of 9.5 mg cm −3 . Moreover, the sponges possess high compressibility and good compression resistance over a wide temperature range from −196 to 1200 °C. In addition, the sponges exhibit low thermal conductivity of 27 mW m −1 K −1 , robust fire resistance, and high near-infrared reflectance, making them an ideal alternative for high-temperature thermal insulation materials.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 29
·期 11
·1806250
·
IF 13.325
Tao Yang,Shanliang Chen,Xiaoxiao Li,Xiaojie Xu,Fengmei Gao,Lin Wang,Junhong Chen,Weiyou Yang,Xinmei Hou,Xiaosheng Fang
In the present work, high-performance photodetectors (PDs) based on a single B-doped 3 C -SiC nanobelt, which are synthesized via catalyst-free pyrolysis of polymeric precursors of polysilazane, are reported. The as-built PDs have a high responsivity and external quantum efficiency of 6.37 × 10 5 A · W −1 and 2.0 × 10 8 % under 405 nm light with a power density of 0.14 mW · cm −2 at 5 V, respectively. The detectivity of the PDs is measured to be of 6.86 × 10 14 Jones. Moreover, the B-doped 3 C -SiC nanobelt PDs exhibit a long-term stability against 300 °C up to 180 days, suggesting their promising applications to be served under harsh conditions.
研究领域:
材料科学
·
光电探测
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2019
·Vol. 220
·期 4
·1800464
·
IF 2.622
Lefan Li,Qiao Wang,Zongjin Li,Siyao Guo,Guoxing Sun
A gel material that can be applied to industry needs to fulfill two requirements: excellent mechanical properties and high temperature resistance. Previous research developed a hydrogel enhanced by sub-5 nm particles, with excellent mechanical properties. While its application in the open environment is still limited by the volatilization of inner moisture, in this research, a non-volatile gel (NV gel) enhanced by 5-nm spherulites is manufactured. The NV gel remains stable after staying at 90 °C for 24 h. Meanwhile, being enhanced by sub-5 nm nanospherulites, the NV gel shows good mechanical properties: with 200 ppm nanoparticle content, the tensile strength reaches 814 kPa and the compressive stress is 173.41 MPa at a recoverable 99% strain. The high temperature resistance is characterized by thermogravimetric analysis (TGA) and mechanical testing after thermal treatment. Transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, time of flight secondary ion mass spectrometry, and thermogravimetric analysis are used to evaluate the microstructure of NV gel. Possessing non-volatile and good mechanical properties at the same time, this NV gel becomes very suitable for fulfilling the application requirement as an engineering material.
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
COMPOSITES PART B-ENGINEERING
·
2019
·
IF 6.864
Shanshan Xiao,Hui Mei,Daoyang Han,Laifei Cheng
SiC nw /C/Si 3 N 4 porous ceramic composites with layer-by-layer structure were successfully fabricated by freeze drying, carbonization and chemical vapor infiltration processes for excellent room and high temperature electromagnetic (EM) wave absorption properties . The sandwich-like structure within the layer and the capacitor model structure between the layers are formed inside of the composite, and these structures are beneficial to the EM wave consumption. The EM absorption properties are optimized by regulating the relative contribution of the polarization loss (primarily provide by SiC nw and defects in carbon phase) and the conductance loss (primarily offered by the conductive network formed by the carbon thin film). As an antioxidant protective layer, Si 3 N 4 ceramic coating is prepared on the outside of the carbon film . The prepared SiC nw /C/Si 3 N 4 porous composites show high absorption efficiency (exceed −39.7 dB), wide absorption band (cover the whole X band), small density (0.92 g/cm 3 ), thin thickness (2.9 mm), and excellent high-temperature stability (stable up to 873 K). The unique structures not only facilitate EM wave absorption, but also enable the composite a compressive strength of 168 MPa.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2022
·Vol. 29
·期 5
·1-8
·
IF 3.061
Quan Hongping,Zhen Xuele,Wu Yang,Duan Wenmeng
Studying the thickening mechanism of non-crosslinked self-thickening polymer (ADDA) is of great significance for plugging high permeability channel and reducing reservoir heterogeneity. ADDA was synthesized from acrylamide, octadecyl dimethyl ammonium chloride, N-(3-(dimethylamino)propyl)methacrylamide and 4-acryloylmorpholine. The changes of apparent viscosity and hydrodynamic radius of ADDA acid solution were studied by simulating the acid rock reaction process. The hydrophobic joint strength and hydrophobic joint structure in the acid rock reaction process of ADDA acid solution were characterized by UV spectrum and environmental scanning electron microscopy (ESEM), and the self-thickening mechanism of ADDA acid solution in the acid rock reaction process was obtained. The results show that the apparent viscosity of ADDA acid solution increases monotonically with the acid rock reaction process, showing good self-thickening ability and high temperature resistance. Compared with the traditional in-situ crosslinking acid, ADDA acid solution avoids the secondary damage caused by the addition of crosslinking agent. Calcium chloride produced in the reaction process increases the polarity of the solution, is conducive to the intermolecular binding of ADDA polymer, and increase the apparent viscosity macroscopically. With the progress of the reaction, the hydrophobic combination strength of acid solution increased, and the hydrophobic combination between polymer molecules formed a three-dimensional network structure.
研究领域:
石油工程
·
高分子化学
·
地质学
✓ 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）