COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Chengmei Gui,Ruxia Zhang,Zhenming Chen,Wangping Wu,Honglin Li,Junjun Huang
Textile-based cotton was developed to fabricate the support for triboelectric nanogenerators (TENGs), which would facilitate the improvement of the device wearability and comfort. But, it is difficult to achieve the fabrication of metal textile-based cotton for electrode materials using traditional technology. In this regard, a textile-based TENGs via electroless plating on cotton surface for fabricating electrode material was established, the output performances under different external forces were studied comprehensively to obtain a full understanding of the relationship between the density of electrostatic charge (δ) and strain of polydimethylsiloxane (PDMS) dielectric material . Results showed that active groups on the rough cotton surface would facilitate the adsorption of Pd 2+ , and then reduce of Ni 2+ to Ni atom in electroless nickel solution. As a result, core-sheath micronfiber yarn with weave structure was fabricated. It is flexible, lightweight, flexible with typical performance of TENGs electrode. The device had stable and excellent performances, and a maximum open-circuit voltage of about 8.3 V was observed from stress of 3.8 kPa or strain of 1.7 × 10 −6 on PDMS layer. More importantly, a new calculation method for the PDMS strain of formation δ was proposed by equation of state . It was also revealed that the δ and PDMS strain represented a linear regression relation when the device under weigh mass of 0.22–0.52 kg, stress of 0.69–1.63 kPa and strain of 0.3–0.72 × 10 −6 . Nevertheless, further increasing stress, actual δ value is firstly higher and then lower than the theoretical value due to fabric fiber deformation.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
Nano Energy
·
2021
·
IF 17.881
Junjun Huang,Wangping Wu,Ruxia Zhang,Guoqing Lu,Bing Chen,Zhenming Chen,Chengmei Gui
Cu/Ag foils or conducting pastes were proposed and developed to fabricate the electrodes for triboelectric nanogenerators (TENGs) on support surface. But the technology is limited by the substrate surface morphology, especially complex shape and high roughness substrate. In this study, electroless nickel plating on polyethylene terephthalate surface for TENGs electrode was established, the output performances under different external forces were studied comprehensively to obtain a full understanding of the relationship between the density of electrostatic charge (δ) and strain of polydimethylsiloxane (PDMS) dielectric material. Results showed that PET modified with primer (SiO 2 particles-resin mixed liquors) could absorb Pd 2+ through coordination effect, which acted as catalyst for the deposition of Ni coating on its surface. The deposition of bead-like structure Ni coating on PET surface with a higher average roughness value (Sr) possessed excellent crystallization and electrical property. The TENGs device with Ni coating electrode was measured and compared. The results showed that the relationship between its output electrical signal and SiO 2 content in the primer also presented a similar trend for the Sr. The TENGs device had stable and excellent performances and yielded a maximum open-circuit voltage of 39 V. More importantly, a new calculation method for the PDMS strain of formation δ was proposed by equation of state. It was also revealed that the δ and PDMS strain represented a linear regression relation, and the formation of vertical intercept is due to TENGs device internal resistance. This work proposes a visible solution for the flexible, low-cost and lightweight TENGs, and offer the quantitative information about the influences of dielectric material strain on the output performance which could not be reported so far.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 36
·19022-19027
·
IF 11.301
Hui Ma,Haoge Cheng,Xinlei Ma,Sen Wang,Zhuqing Zhou,Yuqiao Chai,Ruoqi Chen,Xinyue Zhang,Yonglin He,Yapei Wang,Yan Li,Xusheng Wang,Rui Li,Ning Ma,Mianqi Xue
Charge/light-related advancements have greatly pushed the development of modern technology, and the relationship between charge and light is worth exploring. While research into the applications of light and charge flow (photoelectric current) is in full swing, studies on the reaction between light and electrostatic charge have made little progress on rare ways to realize photo-stimulated discharge. Herein, we link electrostatic charge and light using a bridge of intense heat, which is produced from the efficient photothermal conversion of Ti3C2Tx MXene. The in situ photothermal conversion and selective thermally stimulated discharge are successfully combined, then novel light-induced electrostatic lithography can be realized on both polymethyl methacrylate glasses and nanofilms. In this process the surface temperature of Ti3C2Tx film can be as high as 300 °C using 808 nm near-infrared irradiation at a power density of 1.7 W cm−2. The combination of light and electrostatic charge is also successfully applied to electrostatic printing and chemical reactions.
研究领域:
材料科学
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光子学
·
纳米技术
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Peng Bao,Su Jiang,Yang Chen,Yuanlin Fan,Yaning Li,Boliang Wang
Despite the extensive researches on CL-20 crystals, the mechanical safety issues and process problems of CL-20 applications have not been studied in-depth. Herein, the cellulose nanocrystals (CNC) was doped in microcrystalline wax (MW), oxidized microcrystalline wax (OMW) and hydrogel (PPC) to design and fabricate the cross-linked CL-20 composites by simple water-suspension melting and freeze-drying methods. The composites were characterized by SEM, XPS, TG-DSC, XRD, mechanical sensitivity device and inclined chute tester. It is found that the CNC@OMW composite film exhibits excellent coating effect (99.96%) on CL-20 due to the cross-linking results. The E a of CL-20 is increased from 190.92 to 388.71 kJ/mol under the synergistic effect of the excellent compatibility between components and the compact coating structure of CNC@OMW. Additionally, the film enhances the T p0 of CL-20 from 218.15 to 222.66 ℃ and T b from 220.27 to 223.73 ℃, respectively. While, the PPC@CNC only promoted E a , T p0 and T b of CL-20–292.89.71 kJ/mol, 224.22 ℃ and 225.66 ℃, respectively. Besides, the XRD results confirms that three composite films dose not cause a transformation of the ε- CL-20 crystal phase. Most importantly, the cross-linked film brings mechanical sensitivity of CL-20 from 60 N and 3.5 J to a level of over 360 N and 10.4 J, comparable to WO 3 /Al nanothermite with 5 wt% polyaniline (360 N) and composite with 95 wt% LLM-105 and 5 wt% ternary (11–12 J). This improvement enables the composite explosives to be handled using standard procedures. Furthermore, the ability of the particles to accumulate electrostatic charge after cross-linking coating is significantly reduced, and PVC is more suitable as the contact material of CL-20 and composite particles than copper for use in the transportation and packaging. These findings can serve as a reference for wide application of CL-20.
研究领域:
材料科学
·
炸药工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Qiaoqiao Mu,Wei Zhu,Xian Li,Chufeng Zhang,Yanhui Su,Yuebin Lian,Pengwei Qi,Zhao Deng,Duo Zhang,Shuao Wang,Xing Zhu,Yang Peng
In this work, composite thin films comprising the 2D/2D MOF/rGO heterostructures assembled via Coulomb interaction are employed as the cocatalyst for photocatalytic CO 2 reduction for the first time. The electrostatic charge transfer and the strong π-π interaction induced in the heterostructure effectively modulate the electronic structure of the metal centers in the conductive 2D MOF (Ni 3 HITP 2 ), evidenced by Zeta Potentials, HR-TEM, XPS and XANES. The best thin-film catalyst with an optimal MOF/rGO ratio demonstrates a high CO evolution rate of 3.8 × 10 4 μmol h −1 g film −1 (0.46 min −1 in TOF) and a good selectivity of 91.74%, synergically contributed by the improved photoelectron harvesting on the rGO scaffold, the efficient charge transportation/transfer within the conductive and intimate 2D heterostructure, the coherent energy flow owing to aligned energy levels, and the enriched electron density at the isolated Ni-N 4 sites boosted by electrostatic charge transfer.
研究领域:
材料科学
·
催化
·
光化学
·
纳米技术
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）