Coatings
·
2021
·Vol. 11
·期 2
·238
·
IF 2.881
Xiaoming Feng,Huiying Guan,Ze Wang,Shichao Niu,Zhiwu Han
Transparent materials with antifogging and self-cleaning ability are of extreme significance for utilization in outdoor solar cell devices to alleviate the performance loss and maintenance costs. Herein, with inspiration from the anti-wetting surfaces in nature, regular papillae-like microstructure arrays (PMAs) inspired by lotus leaves were designed via a common UV lithography combined with a soft replication. Subsequently, the biomimetic slippery polydimethylsiloxane (PDMS) film (BSPF) inspired by the pitcher plant was fabricated successfully by infusing with hydrophobic liquid lubricant. The resultant surface has hydrophobic surface chemistry, a slippery interface, PMAs structure. The wettability, optical characteristic, antifogging property and self-cleaning ability of the PMAs-based BSPF were characterized experimentally. The film displays excellent optical transmittance, antireflection, antifogging, and self-cleaning properties, which is superior to the flat PDMS film (FPF). Remarkably, an average reflection of ∼11.3% in the FPF was reduced to ∼8.9% of the BSPF. In addition, after gradient spray test for 120 s, the antifogging efficiency was close to 100% for the BSPF surface in comparison with the flat PDMS film (FPF), biomimetic PDMS film (BPF) and flat slippery PDMS film (FSPF) (35%, 70% and 85%). Furthermore, we also discovered that the BSPF surface exhibited a better self-cleaning performance toward a variety of liquids than solid dust.Keywords:biomimetic PDMS film;antifogging;self-cleaning;papillae-like microstructures;slippery surfaces
研究领域:
材料科学
·
表面工程
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 1
·49611
·
IF 2.52
Zongqi Zhang,Yuanfeng Wu,Lijing Gao,Guomin Xiao
This work aims at investigating the special application of ZSM-5/polydimethylsiloxane (PDMS) membrane being used for pervaporation separation of levulinic acid aqueous solutions. The effects of temperature, downstream pressure, feed concentration, and raw material ratio on the separation performance are investigated by self-made flat-sheet films. When the flow rate of feed pump remained at 0.4 ml/min (10 wt% levulinic acid), a levulinic acid permeation flux of 334.13 g/(m 2 h) and a separation factor of 2.382 at 75°C are observed over the composite membrane doped with 10 wt% ZSM-5. In addition, the acid resistance is enhanced after the PDMS membranes are doped with ZSM-5. Besides, the functionalized process also makes the membranes increase in its hydrophobicity. The results demonstrate that the ZSM-5/PDMS-based membranes show profound prospects for separating levulinic acid aqueous solution.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Fei Xie,Huan Liu,Minyu Bai,Shuai Wen,Fang Xu,Jijie Zhao,Weiguo Liu
Flexible electronics are usually fabricated using stretchable or foldable materials, whereas these materials have no predominance in miniaturization of high-frequency flexible electronics because of low permittivity. In effort to scale down dimensions of electronic devices, the use of ferrite ceramic/polymer matrix may offer superiority over conventional dielectric ceramics. Polydimethylsiloxane (PDMS), which exhibits high transparency and stretchability, has emerged as functional or substrate material for high-performance devices, such as RF antenna. Here, to improve high-frequency magnetic-dielectric properties of PDMS matrix, a high-performance LiZnTiMn (LZTM) ferrite is synthesized and added in the PDMS matrix. We demonstrate, through magnetic, dielectric spectra and elasticity test, a flexible 3L/PDMS composites ( f = 1.0 GHz, μ r = 2.87, ε r = 6.51, tanδ μ = 0.55, tanδ ε = 0.015) was prepared by using mechanical mixing method. Moreover, the elastic modulus and miniaturization factor (n) of the flexible composite are 16.78 MPa and 4.32@1.0 GHz, respectively. The present results provide a reference connecting flexible electronic and RF devices, and offer experience on how to enhance high-frequency performance of polymer-matrix based on ceramic material.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICS LETTERS
·
2018
·Vol. 44
·期 1
·90-93
·
IF 3.589
Jiasheng Li,Yong Tang,Zongtao Li,Xinrui Ding,Longshi Rao,Binhai Yu
Although quantum dots (QDs) have a high quantum yield close to one in a solution, they exhibit low conversion efficiency in a solidification polymer matrix, which hampers the development of QD-based light-emitting diodes (LEDs) with high stability and optical performance. In this study, we proposed a methyl-terminated-polydimethylsiloxane-(PDMS)-based liquid-type packaging structure (LPS) to improve stability and optical performance of QD-based LEDs. Compared with the traditional ethylene-terminated-PDMS-based solid-type packaging structure, the LPS with an optimized kinematic viscosity of 10000 m2/s can provide higher stability and optical performances for QD-based LEDs, including total radiant power and luminous flux. Consequently, the proposed effective and simple strategy has great potential for illumination and display applications.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Peihua Zhang,Runpeng Jiang,Boyuan Li,Aoxun Liang,Xueye Chen,Xiaoxiao Chu
Superhydrophobic surfaces have broad application prospects in droplet transport, sensors, microfluidics and other fields. However, most of the superhydrophobic surfaces are manufactured on rigid substrates or flexible substrates with low deformation. When deformation occurs, the superhydrophobic properties are difficult to be guaranteed, which hinders the practical application of superhydrophobic surfaces. Using a mixture of prepolymer A, crosslinking agent B and dimethylsilicone oil as raw materials, PDMS/dimethylsilicone oil superhydrophobic high tensile film (Pdoshtf) is prepared by simple template and low surface energy treatment. The prepared Pdoshtf shows excellent tensile property and superhydrophobic stability, the tensile ratio at break is 300 %, and the excellent superhydrophobic property can be maintained after 250 % stretching. In addition, droplet falling on the Pdoshtf bounces back in time without any residue, showing excellent superhydrophobic properties. Finally, an energy harvesting device composed of Pdoshtf and electromagnetic system is designed and prepared, which can collect the energy of raindrops through droplet drop and rebound.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Shidong Zhao,Limin Wu,Shuxue Zhou
A liquid-like poly(dimethylsiloxane) (PDMS) brush as an environmentally friendly, low surface energy modifier has a significant effect on improving the antismudge properties of coatings. However, in order to obtain a sufficient length of freely mobile chain segments to meet the liquid repellency, expensive single-terminal functionalized PDMS has to be chosen in the preparation of antismudge coatings. In this work, double-terminal functionalized PDMS was employed to fabricate antismudge polyurethane (PU) coatings with the help of alkyltrichlorosilane (RSiCl3). That is, bihydroxypropyl PDMS (BHPDMS) was terminated with RSiCl3, further grafted onto acrylic polyol chains using its residual Si–Cl bonds, and subsequently cured with an isocyanate trimer. Effects of the molecular weight of BHPDMS (Mn = 1000, 2000, 4300, and 10,000 g/mol) and the type of RSiCl3 (R = methyl, dodecyl, octadecyl) on the surface wettability of antismudge PU coatings were investigated. Among them, octadecyltrichlorosilane (OTS) terminated BHPDMS4300 exhibited the lowest water contact angle hysteresis (10.1°), which was even lower than that of the control samples via direct addition of monohydroxypropyl PDMS or BHPDMS4300. The antismudge PU coating also presented high transparency (90.5%) and excellent liquid repellency against various low surface tension liquids. Even after friction with steel wool, the coating can still maintain excellent antismudge performance. The results also showed enhancement of OTS on the liquid repellency of antismudge PU coatings, indicating its synergistic effect with BHPDMS brush. It is envisioned that OTS-terminated BHPDMS additive provides an avenue to fabricate cost-effective transparent antismudge PU coatings.
研究领域:
材料科学
·
化学工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Yang Han,Xude Qin,Qianqian Kang,Weijie Fan,Dongxiao Han,Yantong Pei,Ye Chen,Wei Wang
Self-healing coating technology is an emerging strategy for extending the longevity of anticorrosion coating. Nevertheless, a significant challenge lies in ensuring that the coating can endure multiple cycles in intricate environments while sustaining a stable mechanical performance. In this study, we prepared a TiO2/Ti3C2Tx/PDMS elastomer coating by incorporating Ti3C2Tx nanosheets to improve mechanical properties and enhance physical barrier performance through photografting. Compared to PDMS without TiO2/Ti3C2Tx, the tensile strength increased from 10.32 to 16.24 MPa. Even after undergoing multiple loading–unloading cycles, the elastomer retained 88.98% of its initial strength, demonstrating remarkable durability and self-healing capabilities. Due to the presence of dynamic disulfide bonds, the coating can undergo a self-healing process within 30 min under 60 °C heating conditions. Furthermore, the presence of TiO2/Ti3C2Tx modified through photografting enhanced hydrophobicity and formed a micro/nanolayered “maze effect” structure, establishing a passive anticorrosion mechanism. This structure demonstrated sustained corrosion resistance for up to 50 days in aggressive environments, effectively preventing the corrosive medium from compromising the metal substrate.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2017
·
IF 5.527
Heiyan Zhang,Bingbing Li,De Sun,Xiaoling Miao,Yunlei Gu
In this study, hydrophobic asymmetric SiO 2 -PDMS-PVDF hollow fiber membranes were prepared for the vacuum membrane distillation (VMD). To make PVDF dope solution, hydrophobic nano-fumed silica (SiO 2 ) and polydimethylsiloxane (PDMS) were used. The effects of SiO 2 concentration on membrane parameters such as membrane morphology, hydrophobicity , porosity, thickness, pore size, liquid entry pressure , burst pressure, Fourier transformed infrared spectroscopy , thermal property, mechanical property and permeability were investigated. With the increasing of nano-particle concentration, membrane hydrophobicity, mechanical property and thermal stability improved. Furthermore, membrane VMD properties under various operation conditions were studied, the membranes showed a stable substantial flux of 44.27 LMH and a stable high salt rejection of over 99.9% under the optimum operation conditions of 75 °C, 35 g/L, 87 kPa, and 50 L/h. The results of our research demonstrated that the prepared hydrophobic asymmetric SiO 2 -PDMS-PVDF hollow fiber membranes not only had high permeability and good anti-wetting property but also exhibited a satisfying stability for the vacuum membrane distillation of desalination .
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2019
·Vol. 125
·期 12
·1-7
·
IF 1.784
Cheng Xiao,Bao Chongzhi,Wang Xiaoming,Zhang Fan,Dong Wentao
Current soft surface electrodes have attracted more and more attention owing to their potential applications in the fields of biological signal monitoring, wearable human–machine interface and internet of things. The paper presents that soft dry electrode based on PDMS-CB conductive polymer is designed and fabricated to continuous, long-term, stable electrocardiogram (ECG) signal recordings which is conformal contact with the soft skin surface. The wearable electronic platform based on the soft dry electrode is built up to collect the ECG data. Integration of the soft dry electrodes with wearable electronic platform would improve the wearability and adaptability of the soft electrode in biological healthy monitoring which represents the future application in ubiquitous healthcare. Experiments have demonstrated that ECG data from the soft electrodes are recorded with PQRST wave which are similar to ECG data from Ag/AgCl gel electrodes. Meanwhile, robustness and stability of ECG signal are validated by the soft dry electrodes with different body actions.
研究领域:
生物医学工程
·
健康监测技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2024
·
IF 3.7
Hongmei Zhong,Ting Meng,Wenxiang Ding,Yi Xiao,Peng Zhang
Passive radiative cooling technology serves as an energy-free alternative to traditional cooling systems. Porous polymer structures are frequently employed for radiative cooling by leveraging the refractive index mismatch between the polymer and the pores, enabling the scattering of incoming sunlight. Recently, water-soluble and readily available Sodium chloride (NaCl) particles have been utilized as sacrificial templates for sustainable pore creation. Nevertheless, optimizing NaCl particle size, and thus the polymer pore size to enhance scattering capabilities remains a challenge. Here, we report a simple, scalable, and sustainable approach to creating an optimized porous polydimethylsiloxane (PDMS) film. This approach utilizes ultrafine NaCl powders as sacrificial templates, which were synthesized via ultrasonic precipitation to ensure their small size. The ultrafine NaCl particles have a size distribution centered around 6–8 μm, and the as-fabricated porous PDMS film achieves a high thermal emissivity of 0.95 within the atmospheric window (8–13 μm) and exhibits a reflectivity of 0.95 within the visible range (0.4–0.78 μm). Due to the desired dual-spectrum properties, the porous PDMS film exhibits a superior subambient cooling capacity over that fabricated with typically larger NaCl particles under strong sunlight. This study offers a scalable and practical radiative cooling solution for sustainable thermal management.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiaming Wang,Feifei Kang,Yifei Chen,Xiujuan Zhang,Xiaobin Jiang,Gaohong He,Xuehua Ruan
Artificial lung membranes are the heart for extracorporeal oxygenation. Hereinto, the nonporous PDMS-based membranes have excellent biocompatibility, and also isolation ability to both blood and harmful matters. Nevertheless, their CO 2 /O 2 selectivity, in the conventional cases using pure-oxygen sweeping stream, is not enough to accomplish sufficient CO 2 removal in balance with O 2 addition. In this work, the oxygenation mode using oxygen-enriched stream, faithfully based on the permeation mechanism, is established to overcome this bottleneck. To neutralize the negative impacts caused by lowering oxygen content and its partial pressure, PDMS-based composite membranes with ultra-thin selective layer to enhance mass transfer have been fabricated successfully. The experiments manifest that the selective layer, on the basic condition that the composite structure is stable enough to make surface modification and realistic utilization, is decreased to 376 nm on the porous substrates. O 2 and CO 2 permeation rates through the ultimate membrane samples have been enhanced to 502 GPU and 4117 GPU, respectively. In this instance, the essential oxygenation could be sustained with O 2 partial pressure less than 446 mmHg in the sweeping stream. The minimum membrane area for a common treatment case is 0.05 square meters. Once the membrane area is increased to 0.18 square meters, the sterile air after purification could be directly used for oxygenation. In comparison to the oxygenation devices being used currently, membrane area can be saved by about 90 %, which is highly significant to reduce the injuring influence on blood cells. All in all, the artificial lung membranes with ultra-thin PDMS coating layer have promising future in realistic utilization.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Nuo Duan,Mofei Shen,Shuo Qi,Wenyue Wang,Shijia Wu,Zhouping Wang
An aptamer-based sensitive method was developed here for detection of multiple foodborne pathogens in food matrix by surface-enhanced Raman scattering (SERS) technology. Polydimethylsiloxane (PDMS) film was first prepared and then coated with gold nanoparticles (AuNP) to act as an active substrate for the enhancement of Raman scattering. The as-prepared Au-PDMS film was functionalized with specific pathogen aptamers (Apt) to capture the targets. In addition, aptamers functionalized AuNP integrated with Raman reporters (4-Mercaptobenzoic acid (4-MBA)/Nile blue A (NBA)) were fabricated as pathogen-specific SERS probes. In this scheme, pathogens were first captured by Apt-Au-PDMS film and then bind with SERS probes to allow the formation of a sandwich assay to complete the sensor module for the detection of multiple pathogens. With Vibrio parahaemolyticus and Salmonella typhimurium as model targets, this protocol can selectively detect 18 cfu/mL and 27 cfu/mL, respectively. Furthermore, this platform can be successfully applied to detect pathogens in seafood samples with recoveries ranging from 82.9% to 95.1%.
研究领域:
食品安全检测
·
生物传感
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）