Flexible, breathable, and reinforced ultra-thin Cu/PLLA porous-fibrous membranes for thermal management and electromagnetic interference shielding

Chang, Jinlin; Chen, Meng; Shi, Bowen; Wei, Wenyuan; Li, Renzhi; Meng, Jinmin; Wen, Haobin; Wang, Xiangyu; Song, Jun; Hu, Zhirun; Li, Yi; Li, Jiashen

doi:10.1016/j.jmst.2023.01.019

Cited by 20 publications

(9 citation statements)

References 23 publications

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“…Electrospun equipment kept fixed parameters: 30-mL syringe; 19-G needle; 30-cm distance between the needle and the collector; 17-kV voltage; 5-mL/h feeding speed; and 2-h collection. 25 CS was obtained by the following method. First, a candle was lit and a glass plate was placed above the candle flame.…”

Section: Preparation Of Plla Nanofibers and Csmentioning

confidence: 99%

“…The realization of low‐cost, large‐area, and durable nanowrinkle membranes remains a challenge. Also, ultrathin electrospun membranes are often easily damaged 25 . Therefore, an effective treatment procedure based on electrospun membranes is urgently needed to develop the durability of the material while realizing high specific surface area photothermal films.…”

Section: Introductionmentioning

confidence: 99%

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Reinforced nanowrinkle electrospun photothermal membranes via solvent‐induced recrystallization

Chang,

Wang,

et al. 2024

EcoMat

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Wearable photothermal materials can capture light energy in nature and convert it into heat energy, which is critical for flexible outdoor sports. However, the conventional flexible photothermal membranes with low specific surface area restrict the maximum photothermal capability, and loose structure of electrospun membrane limits durability of wearable materials. Here, an ultrathin nanostructure candle soot/multi‐walled carbon nanotubes/poly (L‐lactic acid) (CS/MWCNTs/PLLA) photothermal membrane is first prepared via solvent‐induced recrystallization. The white blood cell membrane‐like nanowrinkles with high specific surface area are achieved for the first time and exhibit optimal light absorption. The solvent‐induced recrystallization also enables the membrane to realize large strength and durability. Meanwhile, the membranes also show two‐sided heterochromatic features and transparency in thick and thin situations, respectively, suggesting outstanding fashionability. The nano‐wrinkled photothermal membranes by novel solvent‐induced recrystallization show high flexibility, fashionability, strength, and photothermal characteristics, which have huge potential for outdoor warmth and winter sportswear.image

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Section: Preparation Of Plla Nanofibers and Csmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reinforced nanowrinkle electrospun photothermal membranes via solvent‐induced recrystallization

Chang,

Wang,

et al. 2024

EcoMat

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“…Due to the combination of dielectric and magnetic materials in the core-shell design of the composite, it exhibits excellent dipole polarization and efficient permeability and permittivity. Chang et al [30] deposited copper particles on PLLA substrates to develop ultrathin porous Cu/PLLA fibrous membranes. They reported that the porous structure of the membrane not only enhances the diffusion of the conducting materials and increases SE.…”

Section: Metal Filler-reinforced Biocompositesmentioning

confidence: 99%

Recent developments in sustainable EM wave shielding composites- review

Prabhu,

Shivamurthy,

2023

Mater. Res. Express

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Due to advancements in technology, there is tremendous demand for electronic gadgets that are essential for daily life. These gadgets emit electromagnetic radiation (EMR), harming the health of people in regular contact with these gadgets and creating electromagnetic interference (EMI) to neighbor electronic devices. EMI deteriorates the intended functions of the gadgets. Hence, electronic devices require EM radiation shielding. In this context, synthetic polymer composites become alternative materials to metal due to many advantages. But, synthetic polymer composites are non-degradable, and disposal once after usage is difficult. From this point of view, researchers further proposed biodegradable EM radiation shielding materials. In this regard, the advanced status of research on biodegradable EM radiation shielding authors has been presented in recent research reviews in this article. Mainly the EM radiation shielding mechanisms and different types of bio-degradable EM radiation shielding materials recently developed by various researchers are reported. As a summary, the salient features of the research review and the scope for further research are also discussed.

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“…Compared with the chemical reagents chosen in other studies, such as the utilization of copper sulfate pentahydrate and borane dimethylamine complex, the coproducts in this study are dehydroascorbic acid and acetic acid, which are environmentally friendly with low toxicity. − After Cu nano/microparticles were deposited on the PLLA fibrous membrane surface, they were distributed evenly on both sides of the PLLA membrane. The final PLLA/Cu fibrous membrane presented a good antimicrobial ability, excellent air permeability, and superhydrophobicity.…”

Section: Introductionmentioning

confidence: 99%

Hierarchically Porous, Superhydrophobic PLLA/Copper Composite Fibrous Membranes for Air Filtration

Huang,

Meng,

Liao

et al. 2024

ACS Appl. Polym. Mater.

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Epidemics such as pulmonary tuberculosis and pertussis can spread quickly through the air in enclosed or small spaces. Most of these diseases are caused by various bacteria. In hospitals, nursing homes, and biology laboratories, the requirement for air quality is often high. Particulate air filters can remove infectious bacteria from the air, making them a good choice for local ventilation systems to capture and remove bacteria or other pathogenic microbes. With high surface area, electrospun poly(l-lactic acid) (PLLA) fibrous membranes have the ability to capture small particles like bacteria. Moreover, copper has significant antimicrobial properties. In this Letter, we present a hierarchically porous PLLA membrane created through electrospinning and acetone treatment. Additionally, we describe two methods for loading copper particles onto the hierarchically porous PLLA membrane, thereby providing capabilities for capturing and killing bacteria. The experiments demonstrated that the final PLLA/Cu composite fibrous membranes exhibit not only excellent air permeability but also remarkable antimicrobial performance while maintaining bendability and superhydrophobic ability. This study provides a simple process, low energy cost, and environmentally friendly method to produce the copper-coated PLLA membrane, which is especially suitable for potential applications in high-flux filtration equipment in hospitals, nursing homes, and biology laboratories.

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Flexible, breathable, and reinforced ultra-thin Cu/PLLA porous-fibrous membranes for thermal management and electromagnetic interference shielding

Cited by 20 publications

References 23 publications

Reinforced nanowrinkle electrospun photothermal membranes via solvent‐induced recrystallization

Reinforced nanowrinkle electrospun photothermal membranes via solvent‐induced recrystallization

Recent developments in sustainable EM wave shielding composites- review

Hierarchically Porous, Superhydrophobic PLLA/Copper Composite Fibrous Membranes for Air Filtration

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