APPLIED OPTICS
·
2022
·Vol. 61
·期 15
·4558-4566
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IF 1.905
Jian Jin,Jian Jin,Zhong Wang,Jun Wu,ZhenHua Yu,XiaoBao Cao,XiaoBao Cao,XuDi Wang,XuDi Wang
Polydimethylsiloxane (PDMS) and polyurethane acrylate (PUA) are excellent pattern transfer materials. In this study, PDMS-PUA bi-directional replication technology is explored using the PDMS grating as a template, and relevant technical issues are discussed in detail. Special surface treatment and process optimization are applied to solve the problems of demolding, PDMS polymerization inhibition, and substrate flatness. Further experiments show that the technology can be employed to replicate nanoscale structures and has the potential value of prolonging the longevity of the original template. Additionally, utilizing the advantage of the high elasticity of PDMS materials, two applications of bi-directional replication technology are demonstrated. One is to increase the line-density of the grating by stretching, and the experimental results show that the line-density of the grating increased by 26.6%. The other one is to fabricate the convex grating. Compared with the original planar PDMS grating, the resolution of the first-order diffraction spectrum of the convex grating at the focal point has been greatly improved. Since this technology requires simple equipment, and PDMS and PUA are reusable, it has the advantages of low cost, simplicity, and rapid fabrication. The two application examples also indicate that the technology has good application value.
研究领域:
材料科学
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纳米技术
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2013
·
IF 2.404
Chao Du,Jun Shi,Jin Shi,Li Zhang,Shaokui Cao
Hybrid CaCO 3 microparticles coated by sodium poly(styrene sulfonate) (PSS) and aliphatic poly(urethane-amine) (PUA) were developed as thermal-/pH-responsive drug delivery vehicles via LbL self-assembly technique. The DOX release from the CaCO 3 microparticles was higher than 60% within 36 h, whereas the value of PUA/PSS-coated microparticles was only 20%. The results demonstrated that the PUA/PSS multilayer coating could reduce the drug release rate and significantly assuage the initial burst release of DOX. In addition, the drug release of the hybrid microparticles was found to be thermal-/pH-dual responsive. More interestingly, more than 90% of DOX was released in 36 h at pH 2.1 and 55 °C owing to the combined action of the dissolution of the CaCO 3 core and the shrinkage of aliphatic PUA.
研究领域:
药剂学
·
生物材料学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 9
·3369-3377
·
IF 2.2
Yao Jiale,Xu Jiang,Cui Ao,Wang Rui,Hao Longyun
In this study, the molecules in wool fabric were modified to convert their disulfide bonds into sulfhydryl groups (–SH) by using tris (2-carboxyethyl) phosphine hydrochloride (TCEP) as a reducing agent. The XPS, SEM, and UV–visible absorption spectrum were utilized to track the modification process. MXene and UV-curable PUA resin were blended and printed on the modified wool substrates by screen printing way, followed by a sustainable UV irradiation to effectively fix the printed coating on them. The effects of TCEP on the wettability, electrical resistance of conductive coatings were investigated. Especially, the durability of the conductive coatings to mechanical operations, wet and temperature treatment were systematically evaluated by measuring the resistance change rate on unmodified and TCEP modified wool fabrics, respectively. The results indicated that TCEP modification of wool fabrics could significantly improve the durability and stability of conductive coatings. This was because the active –SH groups in modified wool could participate in the polymerization of PUA molecules into a film under the excitation of UV photo-initiators, greatly improving the integrity and toughness of its structure and ultimately resulting in better adhesion between conductive coatings and wool fabrics.
研究领域:
材料科学
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纺织工程
·
表面化学
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产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
·
2022
·Vol. 19
·期 3
·977-988
·
IF 2.339
Xu Xinmeng,Zhou Zhongqun,Qin Liangrong,Yu Caili,Zhang Faai
It is difficult to produce coatings that have good mechanical and self-healing properties. In this study, polyvinyl alcohol/polyurethane/polyurea (PVA/PU/PUA) microcapsules (MCs) loaded with isophorone diisocyanate (IPDI) as core materials were first prepared by interfacial polymerization in an oil-in-water emulsion using different PVA as an emulsifier. The MCs were then uniformly dispersed in the matrix. Optical microscopy and scanning electron microscopy revealed that the size of MCs decreased as alcoholysis and polymerization degree of PVA increased. Thermogravimetric analysis showed that the MCs prepared with the high polymerization or alcoholysis degree of PVA revealed outstanding thermal stability, and the initial decomposition temperature increased by approximately 100°C compared with IPDI. Furthermore, the self-healing performance of the two-component waterborne polyurethane (2K WPU) coating system containing MCs was investigated. The 2K WPU coatings with 9 wt% PVA/PU/PUA MCs exhibited excellent self-healing, mechanical properties, and corrosion resistance, and indicated a high potential for smart coating.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2025
·Vol. 15
·期 9
·985
·
IF 2.8
Jie Fang,Rongqing Dong,Meng Zhou,Lishan Liang,Mingna Yang,Huakun Xing,Yongluo Qiao,Shuai Chen
Poly (3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) stands out as a renowned commercial conducting polymer composite, boasting extensive and promising applications in the realm of film electronics. In this study, we have made a concerted effort to overcome the inherent drawbacks of PEDOT:PSS films (especially, high moisture absorption, mechanical damage vulnerability, insufficient substrate adhesion ability, etc.) by uniformly blending them with polydimethylsiloxane polyurea (PDMS-PUa) and silica (SiO2) nanoparticles through a feasible mechanical stirring process, which effectively harnesses the intermolecular interactions, as well as the morphological and structural characteristics, among the various components. The Si−O bonds within PDMS-PUa and the −CH3groups attached to Si atoms significantly enhance the hydrophobicity of the composite film (as evidenced by a water contact angle of 132.89° under optimized component ratios). Meanwhile, SiO2microscopically modifies the surface morphology, resulting in increased surface roughness. This composite film not only maintains high conductivity (1.21 S/cm, in contrast to 0.83 S/cm for the PEDOT:PSS film) but also preserves its hydrophobicity and electrical properties under rigorous conditions, including high-temperature exposure (60–200 °C), ultraviolet (UV) aging (365.0 nm, 1.32 mW/cm2), and abradability testing (2000 CW abrasive paper, drag force of approximately 0.98 N, 40 cycles). Furthermore, the film demonstrates enhanced resistance to both acidic (1 mol/L, 24 h) and alkaline (1 mol/L, 24 h) environments, along with excellent self-cleaning and de-icing capabilities (−6 °C), and satisfactory adhesion (Level 2). Notably, the dried composite film can be re-dispersed into a solution with the aid of isopropanol through simple magnetic stirring, and the sequentially coated films also exhibit good surface hydrophobicity (136.49°), equivalent to that of the pristine film. This research aims to overcome the intrinsic performance drawbacks of PEDOT:PSS-based materials, enabling them to meet the demands of complex application scenarios in the field of organic electronics while endowing them with multifunctionality.
研究领域:
材料科学
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高分子科学
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电气工程
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表面工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wanxing Zheng,Yufei Tang,Rui Yang,Zhangwen Xie,Yani Sun,Kang Zhao
Effectively attenuating highly penetrative low-frequency noise (LFN, f < 500 Hz) presents a significant challenge. Traditional acoustic insulation materials are circumscribed by the mass law, presenting an inherent conflict between lightweight design and acoustic insulation. Despite the promising potential of PUA aerogels in acoustic insulation, attributed to their lightweight and high damping properties, their low-density results in inadequate areal density. Consequently, it remains challenging to effectively suppress LFN through mass inertia alone. Moreover, lightweight design often reduces mechanical properties, creating a conflict between lightweight, high strength, and low-frequency acoustic insulation. Inspired by the periodic structures of metamaterials, this study fabricates a PUA aerogel with an ordered metamaterial-like structure (density: 0.126 g/cm 3 ). Through self-assembly induced by sodium dodecyl sulfate (SDS), an ordered porous cavity and fibrous topological skeleton were formed. This structure creates an efficient interfacial reflection network that provides dynamic acoustic impedance for LFN attenuation. The average STL is at least 42.6 dB in the 45–500 Hz range and 39.6 dB in the broader 45–6300 Hz range, 16.35 times higher than that of commercial melamine foam of the same 2 cm thickness. Its weight is just 1/770 that of lightweight concrete bricks with equivalent noise reduction performance, and its thickness is only 2/25 of theirs. At 145 °C, the aerogel maintains a temperature difference of approximately 105.05 °C between its surfaces. The compressive strength of the modified aerogels is 2.76 times that of unmodified PUA aerogels. The simple, cost-effective fabrication process and the lightweight, high-strength, and outstanding low-frequency acoustic insulation properties make metamaterial-like PUA aerogels promising for noise reduction in residential, transportation, and industrial applications.
研究领域:
材料科学
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声学超材料
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噪声控制工程
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聚合物纳米复合材料
·
可持续建筑材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 41
·e54523
·
IF 3
Guiyou Jiang,Song Wu,Wei Yan,Tian Tian,Yang Li,Youwei Liao,Yan Yang
This paper presents a viable coating design for the production of waterborne coatings using PUA, Silicone-modified-PUA, Al-SiO 2 , and PTFE as key ingredients. The coatings are prepared through an air compression spraying technique followed by a photocuring procedure. The resulting PUA/Silicone-modified-PUA/Al-SiO 2 /PTFE coating exhibits exceptional properties including high hardness, low surface tension, and a low coefficient of friction. Experimental findings reveal noteworthy characteristics of the coating. It possesses a gloss level of 4–6°, a hardness of 492.69 N/mm, an elasticity modulus of 11469.94 MPa, a surface roughness of 0.87 μm, a dynamic coefficient of friction of 0.125 μN, and a surface tension of 0.4967 mN/m. To assess its performance, the coating underwent rigorous tests such as the CS-5 Wool Touchpad Shinning Friction test with a 200 g load over 250,000 cycles. It exhibited minimal changes in gloss (≤2°) and color difference (∆E ≤ 0.75). Additionally, the CS-10 abrasive head Optical Surface Taber Abrasion Resistance test was conducted using a 500 g load for 10 cycles, resulting in a Class 1 rating, and after 100 cycles, it achieved a Class 3 rating. This demonstrates its remarkable resistance to tribological environments, enduring tapping, touching, and scraping by fingers over extended periods.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 11
·
IF 1.768
Caideng Yuan,Jingpeng Wang,Mingtong Cui,Yan Peng
Waterborne polyurethane/polyacrylate (PUA) emulsions were prepared by dispersing polyurethane (PU) prepolymer in polyacrylate (PA) emulsion; therefore, the PU particles formed in the presence of PA nanoparticles. The particle size and its distribution of the composite PUA emulsion were determined by dynamic light scattering. The result shows that the average particle size increases initially and then decreases with increasing PA content, which is confirmed by transmission electron microscope characterization. The surface properties of PUA films were analyzed by water contact angle and atomic force microscope topography. It indicates that the water contact angle and the average roughness of the composite PUA films are larger than those of the PU film. Meanwhile, mechanical properties test, scanning electron microscopy, and thermogravimetric analyses disclose that the PUA films are characterized by enhanced tensile strength, rough fractured surface, and good thermal stability. The preparation method proposed in this article is an effective and convenient way to manufacture composite PUA emulsion. The composite PUA emulsion can be potentially used in coatings. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43203.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Wenjuan Cui,Zhengang Chen,Ruinan Xiong,Leyan Tang,Ling Zhu,Chenyang Cai,Xiaosong Zhou
Corrosion resistance is a critical challenge for magnesium alloys, particularly AZ31B, in aerospace, military, and biomedical applications. This study investigates the anti-corrosion performance of superhydrophobic SiO₂ NPs-modified PTFE/PUA hybrid coatings on AZ31B, fabricated using rod and spray painting techniques. The coatings exhibited excellent superhydrophobic properties, with contact angles exceeding 155° and a contact angle hysteresis (CAH) below 5° Electrochemical evaluations of superhydrophobic SiO₂ NPs-modified PTFE coatings demonstrated a reduction in i corr by four orders of magnitude compared to that of raw AZ31B Mg alloys, achieving a corrosion inhibition efficiency (η p ) of ∼ 99.9 % in a 3.5 wt % NaCl solution. The E corr shifted positively by 0.968 V and 1.022 V, respectively. Additionally, the R ct of the SiO₂ NPs-PTFE hybrid coatings increased by four orders of magnitude compared to blank PTFE-0-R coatings, indicating robust and enhanced corrosion resistance. The study also found minimal differences in corrosion protection based on fabrication technique, while SiO₂ NPs-PUA coatings showed limited effectiveness in corrosion resistance. These findings highlight the potential of superhydrophobic PTFE hybrid coatings in addressing corrosion challenges for magnesium alloys.
研究领域:
材料科学
·
腐蚀与防护
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 34
·45208
·
IF 1.86
Caideng Yuan,Mengyao Wang,Haitao Li,Zhongwei Wang
Polyurethane–acrylate oligomer terminated with multiple unsaturated bonds was prepared using isophorone diisocyanate, (IPDI), methylene diphenyl diisocyanate, and polyols as monomers, using 2,2-dimethylol propionic acid as hydrophilic chain extender, together with pentaerythritol triacrylate (PETA) as end-capper. The UV-curable waterborne polyurethane–acrylate (UV-WPUA) composite emulsion was obtained by mixing the PUA oligomer with certain content of reactive diluents and then dispersing the mixture in water. The molecular structure of the polyurethane prepolymer, PUA oligomer, and UV-cured polymer was investigated by Fourier transform infrared spectroscopy. The influence of the composition and content of the diluents and end-capper on UV-WPUA properties, including the emulsion stability, thermal property, water resistance, adhesion, hardness, glossiness of polymer film were studied. The results show that the WPUA emulsion has excellent stability, and the UV-cured film features good hardness and remarkable water resistance when PETA is used as end-capper and the end-capping ratio of the polyurethane prepolymer is 70% and dipentaerythritol hexaacylate/dipropylene glycol diacrylate (mass ratio 1:1) is used as diluent. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45208.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2015
·
IF 5.056
Jun Shi,Xiaojuan Wang,Shuhan Xu,Qiong Wu,Shaokui Cao
In this paper, hollow aliphatic poly(urethane-amine) (PUA)/sodium poly(styrene sulfonate) (PSS) multilayer microcapsules with smart nano-membranes were prepared for smart drug delivery. Thanks to the variation of the electrostatic interaction between aliphatic PUA and PSS, and the shrinkage of aliphatic PUA above its LCST, the hollow microcapsules displayed the distinguished pH- and thermal-dependent drug release properties. SEM results indicated that the microcapsule membranes had better thermal-responsiveness at pH 4.5 than that at pH 7.4. More importantly, the microcapsule membranes exhibited reversible thermal-tunable drug release property at pH 4.5 with significant response to temperature change for the sake of the regularly shrinkage of aliphatic PUA above its LCST. The results suggest that the prepared hollow microcapsules can be employed as the novel “smart” nano-membranes for the controllable drug delivery.
研究领域:
材料科学
·
药物递送系统
·
生物医学工程
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Tongyi Wu,Qiaoling Zhang,Zhongbiao Xie,Xiangqin Ding,Tianhua Liu,Haisheng Hu,Xiaomin Zhang,Guoqiao Lai,Qiu Chen
Additive manufacturing is advancing rapidly and gaining widespread adoption across various industries. Although ZnO nanoparticles (ZnO-NPs) hold significant promise, their tendency to agglomerate in photosensitive resins presents a challenge, obstructing the UV-curing process in 3D printing. In response to this, we have innovatively developed a PUA-based functional photosensitive resin for 3D printing, which incorporates highly dispersible Organosilicon@ZnO-NPs. These nanoparticles exhibit smaller sizes and a more uniform distribution, achieved through the spray sedimentation method. Using Digital Light Processing (DLP), the resin demonstrated enhanced mechanical properties, including a tensile strength of 75.188 MPa (a 96.34 % improvement), a flexural modulus of 2223.276 MPa (a 71.81 % improvement), as well as high-precision 3D-printed material. The material also exhibited efficient broad-spectrum antimicrobial properties (99.64 % against E. coli and 98.93 % against S. aureus ) and strong UV-shielding performance (97.32 % UV-blocking rate). Mechanistically, the improvement in mechanical properties is attributed to the role of Organosilicon@ZnO-NPs, which function similarly to an amine chain extender. This allows them to establish a robust hydrogen bonding network within the PUA-based photosensitive resin and react with free –NCO groups in the system. The antimicrobial and UV-shielding effects stem from the combined actions of Organosilicon@ZnO-NPs, which disrupt bacterial cell membranes, release Zn 2 ⁺ ions, and scatter and absorb UV light. This study paves the way for novel applications of ZnO-NPs in UV-curing 3D printing, opening new avenues for innovation.
研究领域:
材料科学
·
生物医学工程
✓ 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）