POLYMER BULLETIN
·
2021
·Vol. 79
·期 6
·3665-3679
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IF 2.87
Song Lizhi,Yuan Hui,Gong Yunlei,He Changlin,Zhou Hongyu,Wan Xiaojin,Qin Wei,Yang Sen,Ren Xianyan
Abstract With the increasing difficulty in exploitation of low-permeability, high water content and other unconventional reservoirs, a new kind of proppants that possess not only ultra-light weight and high strength and but also hydrophobic performances have attracted more and more interests. Here, this kind of proppants were designed and prepared successfully in the form of polymer microspheres. What's more is that the polymer microspheres (named O-MSDBs) showing high strength and stable hydrophobicity were prepared by a one-step suspension polymerization between styrene, divinyl benzene and γ-methacryloxypropyl-trimethoxy silane accompanying with the formation of silica through sol–gel process. When compared with reported ultra-lightweight proppants (ULWPs), the O-MSDBs not only perform better in ultra-lightweight (0.9917 g·cm −3 ) and are comparable in high strength (low crushing ratio of 0.89–2.53% at 55–69 MPa), but also show new hydrophobic function. The water contact angle on the surface of O-MSDBs is 140.7° that keeps about more than 80% after mechanical abrasion or acid dissolution. The one-step facile preparation method and brilliant performances make O-MSDBs very promising to large-scale preparation and widely applied in fracturing technology as proppants. Graphical Abstract
研究领域:
材料科学
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石油工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2022
·
IF 6.044
Jiayin Chen,Zeyun Cai,Tao Xiang,Peng Du,Guoqiang Xie
The high strength and low cost of titanium alloys have led to the development of these alloys for aerospace applications. In this study, ultra-high-strength Ti–N alloys were fabricated by ball-milling (BM) and spark plasma sintering (SPS), and the effects of the nitrogen content on the microstructure and mechanical properties of the alloys were studied. TiN powder was used as the raw material for doping the alloys with N atoms, and the N content was controlled by tuning the amount of TiN powder added. The yield strength of the Ti–N alloys increased with an increase in the N content and surpassed 2000 MPa when the N content reached 2.66 wt%. Quantitative analysis using the Hall-Petch equation and Labusch model demonstrated that fine-grain strengthening and solution strengthening worked in synergy to enhance the strength of the Ti–N alloys. The ultra-high-strength Ti–N alloys can be applied in the aerospace field for structure use, such as aircraft engines, fasteners , and burn-resistant materials. The preparation of novel Ti–N alloys validates the theoretical application of ubiquitous elements in titanium alloys .
研究领域:
材料科学
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航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2024
·
IF 4.5
Tianyi Huang,Zhiyuan Yu,Yujun Wang,Guangsheng Luo
Catalytic reactions play a central role in chemical production, wherein the strength of the catalyst support is key to long-term stable operation. Simple and efficient strength enhancement methods for heterogeneous catalysis have received significant attention. Herein, we developed a variable-temperature gradient elution technology for low-carbon alcohols to improve the crushing strength of microspheres prepared using the sol–gel method in a microfluidic system. Based on gel fiber growth and rearrangement utilizing the hydrogen-bonding effect between low-carbon alcohols and pseudo-boehmite, the pore structure and fiber network can be reconstructed. Low-carbon alcohols with strong hydrogen bonds and low steric hindrance are more conducive to the formation of short fibers when constructing a dense gel network coordinated with higher alcohols. By combining long and short fiber cross-linked networks, the crushing strength of microspheres is significantly improved, and a dense pore structure with a small pore volume forms. After gradient elution, a crushing strength of up to 71.78 N/mm 2 can be achieved with a high specific surface area of 254.27 m 2 /g, which significantly exceeds that of commercial alumina supports with the same pore volume. This efficient method provides an important solution for the long-term, stable operation of catalysts.
研究领域:
化学工程
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催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 39
·21093-21101
·
IF 14.511
Jun-Peng Wang,Chuhan Fu,Zehua Wu,Hao Lan,Siwen Cui,Tao Qi
Functions of extreme stretchability, ultrahigh tensile strength, high-level conductivity and self-healing capacity endow polymer-based soft electronics with enhanced reliability and prolonged lifespan in deformable applications. However, it is still a huge challenge to achieve such a performance portfolio in individual electronic systems because ultrahigh strength is hardly compatible with self-healing ability in polymers. Herein, a hydrogen-bonded nanoconfinement strategy is proposed to synthesize supertough self-healing polyurethane (TSPU). The hierarchical hydrogen bonds, slight covalent crosslinking and rigid nanoconfinement phases result in self-healing polymers with super stretchability and ultrahigh strength. Self-healing soft electrodes were fabricated possessing the above functions simultaneously with the TSPU polymer as the supporting layer on which a eutectic gallium–indium (EGaIn) liquid metal is spread. By means of the dynamic nanoconfinement strategy, the soft electrodes showed a break elongation of ca. 2500% and a tensile strength of ca. 50 MPa, and 200 000 times its own weight could be lifted up. Remarkably, the resistance of the soft conductor only changed a little even at 2000% strain illustrating an outstanding conductive reliability. The ultrahigh strength, extreme ductility and high reliability bring self-healing electronics to a new high level. Such self-healing soft electronic devices could find promising potential in heavy-duty deformable electronic applications.
研究领域:
材料科学
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软体电子学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Haoxiang Rong,Zhenpeng Zhang,Yanan Zhang,Xun Lu
Due to the multiple different properties in self-healing elastomers that are mutually exclusive based on the different and contradictory molecule chain structures, simultaneously achieving the ultrahigh mechanical performance and high durability of self-healing elastomers is a great challenge and the goal that has always been pursued. Herein, we report a novel strategy to fabricate a self-healing elastomer by introducing interlaced hydrogen bonds with superhigh binding energy. Distinguishing from the quadruple hydrogen bonds reported already, the interlaced hydrogen bond with a lower repulsive secondary interaction and higher binding energy is composed of two molecule units with different lengths and steric hindrance. Connected by the interlaced hydrogen bonds, a supramolecule interlocking network is formed to lock the polymer chains at room temperature, endowing the poly(urethane–urea) elastomer with an unprecedented ultrahigh strength (117.5 MPa, even higher than some plastics), the superhigh fracture energy (522.46 kJ m–2), and an excellent puncture resistance (puncture force reached 181.9 N). Moreover, the elastomers also exhibited excellent self-healing properties (healing efficiency up to 95.8%), high transparency (the average transmittance up to 91.0%), and good durability (including thermal decomposition resistance, thermal oxidation aging resistance, water resistance, and solvent resistance), providing a theoretical basis and technical reference in the development and broadening the application prospects of self-healing elastomers.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2023
·
IF 6.4
Weiqiang Hu,Lianfeng Wei,Yanchao Li,Wen Zhang,Zongqing Ma,Chenxi Liu,Yongchang Liu
Oxide dispersion strengthened (ODS) refractory metals , represented by tungsten and molybdenum alloy , possesses many excellent properties such as high-temperature strength , outstanding thermal microstructure stability and good resistances to oxidation and corrosion. However, in traditional preparation technologies, these ex-situ oxides usually form poor oxide/matrix interface relationships and keep coarse sizes at grain boundaries (GBs), which prominently limit the improvement of alloy mechanical properties until now. In this work, we skillfully employed novel phase interface engineering to successfully construct completely coherent oxide/matrix interfaces in ODS Mo alloys through the newly formed ternary phase oxide nanoparticles or diffusion layers. Furthermore, these ODS Mo alloys are characterized by ultrafine grains, ultrafine subgrains, small and dispersed intragranular and intergranular particles. An amount of oxygen impurities can also be depleted via phase interface engineering, thus purifying Mo matrix. The phase interface engineering endows ODS Mo alloys with ultrahigh strength, excellent ductility and excellent hot machinability , which illuminates a new research direction for those ex-situ oxide dispersion strengthened alloys with excellent mechanical properties.
研究领域:
材料科学
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金属学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2022
·
IF 9.417
Yanqing Xue,Qitang Hao,Xinlei Li,Han Zhang,Peiqing Wang,Chengze Yin,Bo Li,Xinliang Wang
The strength-ductility trade-off severely limits the extensive application of particle-reinforced aluminum matrix composites mainly owing to the critical issues of local particle agglomeration and poor interfacial characteristics. The present work concentrates on these intractable puzzles and proposes Mg-Ag microalloying TiB 2 /Al-4.5Cu composites fabricated by an optimized salt-metal reaction method and multistage heat treatment. The resulting microstructure evidence that this new tactic synergistically ameliorates the detrimental agglomeration of TiB 2 particles by Mg and Ag doped at the TiB 2 /α-Al interface， meanwhile promoting the formation of nanosized Ω-Al 2 Cu and σ-Al 5 Cu 6 Mg 2 phases. The mechanical property experimental results indicate that the Mg-Ag microalloyed TiB 2 /Al-4.5Cu composites exhibit an accredited combination of the tensile strength (ultimate tensile strength is 496.3 ± 15.0 MPa) and ductility (uniform elongation is 12.8 ± 1.4 %). We emphasize the reciprocal effect between TiB 2 particles and the precipitated phase associated with unrelaxed misfit strains. Close attention is also paid to the interface binding characteristics and semi-coherent interphase boundary to evaluate their contribution to the ductility. The microalloying strategy can potentially be applied to many other metal matrix composites and boost analogous approaches for designing ultrahigh yet ductile materials for technological applications.
研究领域:
材料科学
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金属学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Jianan Deng,Haoyu Lian,Yuan Zhuang,Honghao Zhao,Zhanyi Wang,Yongjun Tian,Chao Lin,Haozhong Yuan,Miao Han,Guiwu Lu,Xiao Zhang
Preformed particle gels (PPGs) have been identified as an effective method to control conformance and mitigate excessive water production. However, the weak strength of swollen PPGs makes them susceptible to shear failure during formation migration in harsh reservoir conditions. To address this issue, a novel type of multi-crosslinked preformed particle gels (MC-PPGs) with ultra-high strength, exceptional temperature and salinity resistance has been developed. Vinyl silica nanoparticles (VSNPs) were first prepared and used as nano crosslinking agents and enhancing agents in constructing multiple cross-linking structures with macromolecules, functional monomers, and crosslinking agents. MC-PPGs have an elastic modulus up to 110,000 Pa, which is significantly higher than other existing PPGs. Additionally, when exposed to high-salinity environments (e.g., 20 % NaCl and 10 % CaCl 2 + 10 % MgCl 2 ), MC-PPGs remain for an extended period at elevated temperatures (80 °C for 24 months, 120 °C for 13 months, and over one month at 160 °C). Furthermore, the degradation products of MC-PPGs have minimal impact to reservoir permeability, with a core damage rate below 5 %. MC-PPGs are pH-adaptable (1 < pH < 12), which makes them a promising candidate for reservoirs with supercritical CO 2 flooding. Laboratory coreflooding tests have demonstrated that MC-PPGs provide excellent plugging efficiency (>99.9 %) for fractured cores and ultra-high breakthrough pressure gradients (>14 MPa/m) at varying test temperatures (20 °C, 80 °C, and 120 °C). Considering these unique features, MC-PPGs are ideally suited for oilfield applications.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Fan Wei,Lei Ruixin,Dou Hao,Wu Zheng,Lu Linlin,Wang Shujuan,Liu Xuqing,Chen Weichun,Rezakazemi Mashallah,Aminabhavi Tejraj M.,Li Yi,Ge Shengbo
Commercial wearable piezoelectric sensors possess excellent anti-interference stability due to their electronic packaging. However, this packaging renders them barely breathable and compromises human comfort. To address this issue, we develop a PVDF piezoelectric nanoyarns with an ultrahigh strength of 313.3 MPa, weaving them with different yarns to form three-dimensional piezoelectric fabric (3DPF) sensor using the advanced 3D textile technology. The tensile strength (46.0 MPa) of 3DPF exhibits the highest among the reported flexible piezoelectric sensors. The 3DPF features anti-gravity unidirectional liquid transport that allows sweat to move from the inner layer near to the skin to the outer layer in 4 s, resulting in a comfortable and dry environment for the user. It should be noted that sweating does not weaken the piezoelectric properties of 3DPF, but rather enhances. Additionally, the durability and comfortability of 3DPF are similar to those of the commercial cotton T-shirts. This work provides a strategy for developing comfortable flexible wearable electronic devices.
研究领域:
材料科学
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纺织工程
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可穿戴技术
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Tao Xiang,Peng Du,Zeyun Cai,Kun Li,Weizong Bao,Xinxin Yang,Guoqiang Xie
The contradiction between the strength and ductility of metallic materials is a major scientific problem that has been researched for a long time. Dual-phase equiatomic and non-equiatomic Ti-Zr-Nb-Ta high-entropy alloys (HEAs) with super-high strength and excellent ductility have been successfully developed via mechanical alloying (MA) combined with spark plasma sintering (SPS) technology. This is adjusted by altering the atomic ratios of the different phases. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were performed to confirm the dual-phase microstructure. After the SPS process, the average grain size of the aforementioned equiatomic Ti 25 Zr 25 Nb 25 Ta 25 HEAs (134 ± 50 nm) evaluated by electron back-scattering diffraction (EBSD) is smaller than that of the Ti-Zr-Nb-Ta HEAs (150 µm), which were fabricated using arc melting. According to the Hall-Petch formula, the grain boundary strengthening contribution in the Ti-Zr-Nb-Ta system is 33-fold higher than those fabricated using the arc-melting process. When the alloy phase comprises the equivalent dual-phase, equiatomic Ti 25 Zr 25 Nb 25 Ta 25 HEAs have good comprehensive performance compared to non-equiatomic Ti-Zr-Nb-Ta HEAs prepared using the same process. The yield strength of equiatomic Ti 25 Zr 25 Nb 25 Ta 25 HEAs (2212 ± 38 MPa) is two-fold higher than that of Ti-Zr-Nb-Ta HEAs (1100 ± 90 MPa) fabricated via arc melting. This can be attributed to the ultra-fine grain size. Notably, the equiatomic Ti 25 Zr 25 Nb 25 Ta 25 HEAs possess approximately the same biocompatibility as commercial pure Ti (CP-Ti), indicating that the equiatomic Ti 25 Zr 25 Nb 25 Ta 25 HEAs are provided with a possibility as an advanced biomaterial for the applications of the medical field.
研究领域:
材料科学
·
冶金学
·
生物材料工程
✓ 已验证
DOI
高影响因子
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