PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Weiwei Li,Chunyang Wei,Jiyun Tang,Zongkui Li,Xiaowei An,Qi Li,Jingjing Wang,Liwei Liu
Long-term protection in highly corrosive environments has advanced to use high-solid coatings with high thickness, known as high-build coatings. However, these coatings were found to be more susceptible to cracking and delamination failures in-service with temperature variations. To understand how a high-build film is stressed at different temperatures, we developed an efficient measurement method by employing imaging scanning device and image analysis to quantitatively evaluate internal stress in two purposely formulated epoxy coatings with different elasticities through 30 thermal cycles between −25 to 50 °C. The results showed that the magnitude of internal stress was dependent on the coating elasticity, film thickness, and the difference in coefficient of linear thermal expansion (CTE) between the coating and its substrate apart from the service temperature and the thermal cycles. Moreover, thicker coating develops a significantly higher internal stress, which explains why cracking or delamination is typically associated with excessively thick coatings. The investigated mechanisms of the stress development during thermal cycling will be a useful guide to formulate mechanically durable high-build coatings.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Guangming Yang,Xu Feng,Wei Wang,Qin OuYang,Ling Liu
To date, it is still a challenge to simultaneously reinforce and well monitor the delamination of carbon fiber reinforced plastics (CFRPs) using nanocarbon-based interleaf due to the high electrical conductivity of CFRPs. Herein, this work prepares a novel woven grid composed of carbon nanotubes and graphenes (CG) with various grid densities and suitable resistivity. Results reveal that the CG woven grid-based interleaf could significantly reinforce the interlaminar shear properties of CFRPs, i.e. mode II interlaminar fracture toughness and interlaminar shear strength can be improved by 38–60% and 17–25%, respectively. Meanwhile, the relative resistance change (Δ R / R 0 %) of CFRPs at the delamination initiation stage can reach ~12% or more, which is greater than that reported by previous literatures. The results suggest that the prepared CG woven grid can not only greatly enhance the delamination resistance, but also can sensitively monitor the delamination of the highly conductive CFRPs.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
Bioactive Materials
·
2025
·
IF 20.3
Wenzhong Cao,Xianchi Zhou,Wenbin Dai,Zihao Zhu,Zuolong Liu,Kexin Chen,Yu Yan,Hengshuai Bao,Jian Ji,Peng Zhang
Hydrogel coatings have become indispensable for advanced interventional devices owing to their exceptional lubricity, antithrombogenicity, and antibacterial performance. However, clinical adoption has been hindered by the risk of polymer embolism resulting from coating delamination in vascular systems. Herein, we report an embolism-free hydrogel coating strategy based on chain-entanglement-mediated topological gelation to address this limitation. Through an interface-regulated polymerization process, we fabricate a robust zwitterionic hydrogel coating stabilized by interfacial interlinking and enhanced polymer chain entanglement. This design delivers outstanding long-term antimicrobial and antithrombogenic properties and achieves high toughness, ultra-low friction, and wear resistance. Notably, the chain-entangled topological hydrogel exhibits a unique fail-safe mechanism: upon detachment, it undergoes spontaneous aqueous dissolution rather than forming hazardous debris. This approach can potentially reduce life-threatening complications in interventional therapies by eliminating the risk of polymer-induced embolism.
研究领域:
生物材料
·
介入医学
·
表面工程
·
心血管器械
·
抗凝血
·
感染控制
·
高分子科学
·
转化医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Chunmu Wang,Jiahua Lu,Jie Zhu,Jujun Ruan
Decapsulation constitutes the critical initial phase in the recycling of waste photovoltaic (PV) laminated modules. Wet decapsulation has emerged as a prominent research focus. However, the underlying removal mechanisms of ethylene-vinyl acetate (EVA) encapsulants remain insufficiently characterized, and the optimal solvent has not been selected. This article introduces a green alternative solvent terpinolene to decapsulate waste PV laminated modules. The decapsulation parameters were optimized. The waste PV laminated modules could be completely decapsulated under the identified optimal conditions: 2 cm × 2 cm specimens treated with 90 wt% terpinolene solvent under 800 W ultrasound agitation for 55 min. This study reveals the decapsulation mechanism: the ultrasonic field caused the water and terpinolene to produce O· and groups containing methylene radicals. The free radicals approached the directional C-C and C-O bonds in the bridging structure and the directional C-C bonds in the backbones of EVA and oxidized them to make them interrupt and to be grafted. EVA molecules were broken into multiple and smaller organic molecules, resulting in a swelling effect and loss of viscosity, thus prompting the laminated modules to decapsulate. We report for the first time the use of the green solvent terpinolene coupled to ultrasonic efficiently decapsulating waste photovoltaic laminated modules. And this study pioneers the discovery of the infinite swelling induced by terpinolene-mediated radical reactions in PV EVA encapsulants. It provides scientific information and key technologies for the decapsulating of waste PV laminated modules, the recycling of materials and the closed-loop development of PV industry.
研究领域:
环境科学
·
材料回收
·
清洁能源技术
·
高分子化学
·
可持续工程
·
工业生态学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Zhen-Yuan Wang,Zheng-Jun Fu,Dan-Dan Shao,Mei-Jin Lu,Qian-Cheng Xia,Hui-Fang Xiao,Bao-Wei Su,Shi-Peng Sun
Delamination of the dual-layer membrane fabricated from immiscible polymers is recognized as the main obstacle to advance the technology. The current work discloses an innovative approach to address the delamination issue by incorporating specific functional groups on the polymer chains. Delamination-free P84®/Ultem® dual-layer hollow fiber nanofiltration membranes were obtained by incorporating 4-Fluoro-2-(trifluoromethyl) benzylamine (FTB) in P84® polyimide . The progressively incorporated FTB on P84® decreases solubility parameter difference and establishes specific intermolecular interactions between the polymer pair which contributes to the interpenetration of molecules at the interfacial region of the dual layers. The interpenetrated network structure at the interfacial region renders the robust integrity of the dual-layer membranes. The one-step fabricated membranes had an over 99% rejection of tetracycline (MW: 444.4 Da) in methanol with pure methanol permeance of 3.7 LMH/bar. The elaborated mechanism may potentially enlarge the scope of selecting immiscible polymers for fabricating dual-layer membranes by molecular designing.
研究领域:
材料科学
·
膜技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Lantao Liu,Yiming Li,Shuaize Wang,Yaping Lu,Jiapeng Zhang,Dengke Wang,Yinghui Ding,Daping Qiu,Jin Niu,Yingchun Yu,Xiaohong Chen,Huaihe Song
S doping is an effective strategy to improve the potassium-ion storage performance of carbon-based materials. However, due to the large atomic radius of S and poor thermal stability, it is challenging to synthesize carbon materials with high sulfur content by solid-phase transformation. In this work, we designed a multi-cavity structure that can confine the molten S during heat treatment and make it fully react, then achieving high S doping (7.6 at. %). As we known, S doping can also effectively increase the active sites of carbon materials to obtain higher capacity. In addition, through different ex/in-situ characterizations and DFT calculations , we confirmed that the S atoms can effectively expand the interlayer spacing of carbon, which facilitates the intercalation/deintercalation reaction of K + , thereby significantly improving the rate performance. Therefore, benefiting from the effect of S-doping, the sample exhibits high reversible specific capacity (401.0 mAh g −1 at 0.1 A/g) and rate performance (167.2 mAh g −1 at 5 A/g). The as-assembled K + hybrid capacitor delivers both high energy density and power density (138.5 W h kg −1 and 7692.5 W kg −1 , respectively). This work provides a new approach to design S content carbon-based materials for high performance K + storage.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2025
·
IF 20.2
Miao Ji,Dan Liu,Benben Peng,Yongjian Liu,Xingshu Liao,Deyu Qu
The integration of sulfide solid-state electrolyte (SSE) membranes with silicon-based anodes presents a compelling pathway toward all-solid-state lithium batteries (ASSLBs) with unparalleled energy density and intrinsic safety. However, the compatibility between thin sulfide electrolyte membranes and volume-altering silicon-based anodes has rarely been explored. Here, we systematically investigate the failure mechanisms of electrolyte-free silicon-carbon (Si-C) anodes when paired with dry- or wet-processed sulfide SSE membranes, identifying two degradation pathways: (1) binder decomposition within SSE membranes and (2) stress concentration-induced interfacial delamination . To address these challenges, we engineer a wet-processed sulfide SSE membrane (∼50 μm thickness) by utilizing a chemically inert polyisobutylene (PIB) elastomer binder and a rigid polypropylene (PP) fabric scaffold. This design synergistically endows the SSE-PIB-PP composite membrane with elastic dissipation (411 MPa modulus) and mechanical reinforcement (34.7 MPa tensile strength) while maintaining high ionic conductivity (2.5 mS cm⁻¹). Operando pressure monitoring tests reveal that the membrane redistributes ∼35.5 % of internal stresses generated during Si volume swings, mitigating chemical decomposition and mechanical fracture. The optimized Li-In|SSE-PIB-PP|Si-C half cells deliver exceptional cyclability with 81.3 % capacity retention after 400 cycles (over 200 days) at 0.1C and a high initial delithiation capacity of 5.31 mAh cm −2 at a loading of 7.63 mg cm −2 . Furthermore, the assembled Si-C|SSE-PIB-PP|LiCoO 2 full cell exhibits decent cycling stability at 0.1C with a high cathode loading of 19.51 mg cm −2 . This work demonstrates the potential of optimizing SSE membranes to address key challenges of alloy-type anodes in ASSLBs and provides critical insight for developing reliable high-energy-density ASSLBs.
研究领域:
材料科学
·
电化学
·
储能技术
·
固态电池
·
电池工程
✓ 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）