JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Jing Tian,Sanying Hou,Lingjie Mao,Xin Xu,Humeizi Cao,Xinyi Duan,Lingsisi Li,Zhiling Zhou,Yaqiang Ji,Jin-Qi Xie
Manufacturing of copper micro-patterns is crucial in electronics for its utilization as high conductivity transparent conductive films (TCFs) and circuits. In the preparation process of current TCFs, a plethora of materials have emerged that can replace traditional indium tin oxide (ITO). However, even for the most promising metal-based nanowire materials, there are issues such as high cost, complex welding, and high contact resistance. To address these problems, this paper proposes a printable and filament-drawable polydimethylsiloxane (PDMS)-based adhesive, which, through a novel additive patterning technology, efficiently and economically manufactures self-welding copper micro-meshes and circuits. The adhesive can be processed into micro-patterns through printing and filament drawing, on which ionic Ag can be in situ reduced and anchored, thereby eliminating the need for tedious pre- and post-treatment steps. The fully exposed Ag particles dramatically minimize the usage of precious metal catalyst, thus efficiently catalyzing electroless copper deposition (ECD) reaction. Highly conductive (1.03 × 10 7 S m −1 ) copper circuits can be fabricated on the printed adhesive patterns, exhibiting versatile applicability to diverse substrates. Highly precise copper micro-meshes (∼50 μm) can be fabricated on the filament networks drawn by the adhesive. The copper meshes undergo complete self-welding at junctions during the ECD process, thus exhibiting ultra-low square resistance of 0.45 Ω sq −1 while maintaining a high transmittance of 82.2 %. This is far superior to most of TCFs in published literature.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 13
·3924-3933
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IF 6.641
Peng Li,Xiao Wang,Jiangang Ma,Tingfeng Wang,Wei Zhang,Haiyang Xu,Yichun Liu
Metal nanonetworks fabricated by chemical plating of metals on electrospun polymer nanofiber network templates have come into the spotlight for use as flexible transparent electrodes. However, depositing continuous and smooth metal films on hydrophobic polymer nanofiber templates is difficult because of the Volmer–Weber growth of metals. This work reports a simple argon plasma treatment approach to increase the surface energy of the templates and achieve the formation of dense silver layers. Furthermore, instead of using external treatment methods that either require high energy injection or are incompatible with plastic substrates, a low-temperature Joule heat-assisted self-welding method is used to improve the conductivity of the solution-grown Ag nanofibers. Instantaneous Joule heat generated by a direct current can target the high-resistance interfaces formed between the Ag nanoparticles and at the grain boundaries, thus lowering the junction resistance and decreasing the interface scattering. The resulting Ag nanofiber networks exhibit high visible light transmittance of ∼91%, low sheet resistance of ∼5.4 Ω □−1, and good stretchability. These results offer valuable insight into the abilities of plasma treatment and Joule heating to modulate the metal film formation mode on polymer nanofiber surfaces. These interface engineering methods can be extended to the development of polycrystalline metal nanonetwork-based electronics.
研究领域:
材料科学
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纳米技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 43
·26858-26866
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IF 3.108
Peiyao Yan,Wei Zhao,Xiaowei Fu,Zhimeng Liu,Weibo Kong,Changlin Zhou,Jingxin Lei
Environmental protection and resources exhaustion have become the two major obstacles that the human race faces. Moreover, conventional thermoset polymers, which have been extensively applied in various fields, are difficult to be reprocessed and recycled thereby resulting in a wastage of resources and environmental pollution owing to their chemical crosslinks. Therefore, vitrimers may be a good option to solve this problem. In this study, renewable castor oil was used as the raw material to synthesize multifunctional polyurethane-vitrimers (PUVs), whose intrinsic carbamate bonds undergo transcarbamoylation reactions in the presence of a catalyst. Reprocessing experiments have shown that reprocessed PUVs have nearly the same excellent tensile property compared with the pristine PUVs and have significant potential for future engineering applications. Subsequent studies have indicated that crosslinked networks have properties of thermally-induced dual-shape memory effect (dual-SME) and self-welding due to transesterification reactions of carbamate bonds. As the current methods of dealing with abandoned thermoset polyurethanes have drawbacks, it can be anticipated that our findings will create significant benefits for our life.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 8
·1598
·
IF 4.967
Guancong Chen,Di Chen
Shape-memory polymers (SMPs) exhibit notable shape-shifting behaviors under environmental stimulations. In a specific shape-memory cycle, the material can be temporarily fixed at diverse geometries while recovering to the same permanent shape driven by the elastic network, which somewhat limits the versatility of SMPs. Via dynamic metallo-supramolecular interactions, herein, we report a multi-functional shape-memory polymer with tunable permanent shapes. The network is constructed by the metallic coordination of a four-armed polycaprolactone with a melting temperature of 54 °C. Owing to the thermo-induced stress relaxation through the bond exchange, the SMPs can be repeatedly programmed into different geometries in their solid state and show the self-welding feature. Via further welding of films crosslinked by different ions, it will present heterogeneous solid-state plasticity, and a more sophisticated shape can be created after the uniform thermal treatment. With elasticity and plasticity in the same network, the SMPs will display programmable shape-shifting behaviors. Additionally, the used material can be recast into a new film which retains the thermo-induced plasticity. Overall, we establish a novel strategy to manipulate the permanent shapes of SMPs through solid-state plasticity and develop a multi-functional shape-shifting material that has many practical applications.
研究领域:
材料科学
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高分子化学
✓ 已验证
DOI
高影响因子
Additive Manufacturing
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2021
·
IF 10.998
Zhuo Sun,Yahui Lu,Qian Zhao,Jingjun Wu
3D printing hydrogels with a good resolution, diversified geometries, and a tunable mechanical performance is still a big challenge, which is mainly due to the low photo-reactivity of the high-water containing precursor and the low modulus of the photo-cured hydrogel. In the present work, an acryloylmorpholine - acrylic acid - PEG diacrylate drygel was firstly printed with a good fidelity and subsequently post- treated with an aqueous solution containing specific ions, during which hydration of the hydrophilic network and coordination between the carboxyl and ions occurred simultaneously. The obtained dual-crosslinked hydrogel combined a complex geometry and a good stretchability. This approach decoupled the printability and mechanical properties of the hydrogels. To furtherly show this advantage over conventional direct hydrogel 3D printing, ultrasoft hydrogel lattice structures which cannot be self-supported and purely ionic crosslinked hydrogels with a good self-weldability were demonstrated.
研究领域:
材料科学
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3D打印
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高分子化学
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机械工程
✓ 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）