Progress in Organic Coatings最新文献_第2页

Novel di-2-thienyl ketone derivatives photoinitiators enable fast visible light polymerization and 3D printing 新型二-2-噻吩酮衍生物光引发剂可实现快速可见光聚合和 3D 打印

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2024-11-11 DOI: 10.1016/j.porgcoat.2024.108920

Shining Li, Guanhao Ma, Weineng Lu, Jinqing Qu

A series of Type II photoinitiators (PIs) bis(5-(4-(diethylamino)phenyl)thiophen-2-yl)methanone (EATM), bis(5-(9-ethyl-9H-carbazol-3-yl)thiophen-2-yl)methanone (ECTM) and bis(5-(4-(diphenylamino)phenyl)thiophen-2-yl)methanone (PATM) based on di-2-thienyl ketone were synthesized for the visible light photoploymerization. The maximum absorption wavelengths of EATM, ECTM and PATM in DMSO were 437 nm, 455 nm and 477 nm, respectively. The fast photopolymerization of polyethylene glycol diacrylate (PEGDA) could be initiated in a three-component system consisting of photoinitiator, diphenyliodonium hexafluorophosphate (Iod) and triethanolamine (TEOA) under visible light. The conversion rate of CC bond under different light sources (405 nm, 440 nm and 480 nm) were measured by real-time Fourier transformed infrared spectroscopy (RT-FTIR). The CC bond conversion rate of PATM reached >93 % within 5 s, and the final conversion was up to 98 %, and the polymerization was completed in 10 s. The mechanism of light initiation was analyzed by density functional theory (DFT), steady-state photolysis and electron spin resonance spin trapping (ESR) experiments. Photobleaching, deep photocuring, migration ratio and cytotoxicity were evaluated. Three PIs were used to realize rapid 3D printing in an LCD 3D printer (405 nm). The printing rate was as high as 90 mm h⁻¹ with exposure time 2 s/layer. This study provides ideas for the development of PIs for fast photopolymerization and 3D printing under visible light.

合成了一系列基于二-2-噻吩基酮的双(5-(4-(二乙基氨基)苯基)噻吩-2-基)甲酮（EATM）、双(5-(9-乙基-9H-咔唑-3-基)噻吩-2-基)甲酮（ECTM）和双(5-(4-(二苯基氨基)苯基)噻吩-2-基)甲酮（PATM），用于可见光光聚合。EATM、ECTM 和 PATM 在二甲基亚砜中的最大吸收波长分别为 437 nm、455 nm 和 477 nm。在可见光下，聚乙二醇二丙烯酸酯（PEGDA）可在由光引发剂、二苯碘六氟磷酸盐（Iod）和三乙醇胺（TEOA）组成的三组分体系中快速光聚合。通过实时傅立叶变换红外光谱（RT-FTIR）测量了不同光源（405 nm、440 nm 和 480 nm）下 CC 键的转化率。通过密度泛函理论（DFT）、稳态光解和电子自旋共振自旋捕获（ESR）实验分析了光引发的机理。评估了光漂白、深度光固化、迁移率和细胞毒性。使用三种光致抗蚀剂在液晶三维打印机（405 nm）上实现了快速三维打印。打印速率高达 90 mm h-1，曝光时间为 2 s/层。这项研究为开发用于可见光下快速光聚合和三维打印的 PI 提供了思路。

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引用次数: 0

Synergistic corrosion inhibition of mild steel by chalcone derivatives and KI in acidic media via computational and experimental methods 通过计算和实验方法研究查尔酮衍生物和 KI 在酸性介质中对低碳钢的协同缓蚀作用

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2024-11-09 DOI: 10.1016/j.porgcoat.2024.108911

Rashmi Sehrawat , Priya Vashishth , Vishwas Chaudhri , Rashmi Pundeer , Harish Kumar , Eno E. Ebenso , Bindu Mangla

The corrosion inhibition characteristics of chalcone 4-hydroxy-6-methyl-3-(3-phenylacryloyl)-2H-pyran-2-one derivatives with different functional groups (H, Cl, -CH₃, -NO₂, -OCH₃) studied employing density functional theory (DFT). The study identified the CH-OCH3 derivative as the most effective inhibitor among the compounds analysed. This derivative was synthesized and characterized through IR, ¹H NMR and ¹³C NMR spectroscopy. The CH-OCH₃ inhibitor then studied for its mild steel corrosion inhibition capability using Electrochemical and surface analysis in 1 M HCl. CH-OCH₃ inhibitory efficacy rises in proportionately with their concentration, according to electrochemical results and reaches 85.4 % at 10⁻³ M. Potentiodynamic polarization revealed that it operates as mixed-kind of inhibiting nature. CH-OCH₃ adheres to the Langmuir isotherm when they bind over the mild steel surface. The deposition of the inhibitors on metal surface is additionally verified by surface study utilizing AFM. Additionally, the influence of KI addition over CH-OCH₃ inhibition property has been studied.

利用密度泛函理论（DFT）研究了具有不同官能团（H、Cl、-CH3、-NO2、-OCH3）的 4-羟基-6-甲基-3-(3-苯基丙烯酰基)-2H-吡喃-2-酮衍生物的缓蚀特性。研究发现 CH-OCH3 衍生物是所分析化合物中最有效的抑制剂。研究人员合成了这种衍生物，并通过红外光谱、1H NMR 光谱和 13C NMR 光谱对其进行了表征。然后在 1 M HCl 溶液中使用电化学和表面分析方法研究了 CH-OCH3 抑制剂对低碳钢的腐蚀抑制能力。电化学结果表明，CH-OCH3 的抑制效果随其浓度的增加而成正比上升，在 10-3 M 时达到 85.4%。当 CH-OCH3 与低碳钢表面结合时，会形成 Langmuir 等温线。此外，利用原子力显微镜进行的表面研究也验证了抑制剂在金属表面的沉积情况。此外，还研究了 KI 添加量对 CH-OCH3 抑制性能的影响。

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引用次数: 0

Enhanced antifouling performance of PDMS/Ti3C2 nanocomposite coatings via Pickering emulsion approach 通过皮克林乳液法提高 PDMS/Ti3C2 纳米复合涂层的防污性能

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2024-11-08 DOI: 10.1016/j.porgcoat.2024.108918

Wei Zhang, Shuxue Zhou

MXene has recently attracted a lot of attention due to its unique properties including its antibacterial property. Nevertheless, the antibacterial performance of MXene depends on its distribution at the surface of coatings. In this study, Ti₃C₂ nanosheets were modified by hexyltrimethoxysilane and further used as Pickering emulsifier to emulsify vinyl (or hydrogen) dimethicone at different proportions. Afterwards, the as-obtained vinyl dimethicone Pickering emulsion, hydrogen dimethicone Pickering emulsion, and Karstedt catalyst emulsion were simply mixed to get waterborne cross-linkable PDMS/Ti₃C₂ nanocomposite coatings (HTCP) Compared with solvent-based counterpart (HTCS), HTC-P coating has more Ti₃C₂ distributed at the surface, which favors their resistance to protein adhesion and algal colonization. The anti-algae property to Chlorella of HTC-P coating is nearly 10 times and 4 times higher than that of PDMS coating and HTC-S coating, respectively. The antibacterial performance of HTC-P coating is also quite excellent, of which the antibacterial performance of HTC-P coating containing 4 wt% modified Ti₃C₂ nanosheets reaches 99 % of antibacterial rate against Escherichia coli and 100 % against Shewanella loihica Meanwhile, the HTC-P coating possesses strong mechanical properties and fouling releasing performance. The mechanism for the distribution of Ti₃C₂ nanosheets at the surface of HTC-P coating was also discussed.

由于其独特的性能（包括抗菌性能），MXene 最近引起了广泛关注。然而，MXene 的抗菌性能取决于其在涂层表面的分布。在这项研究中，Ti3C2 纳米片被己基三甲氧基硅烷修饰，并进一步用作皮克林乳化剂来乳化不同比例的乙烯基（或氢基）二甲基硅氧烷。然后，将得到的乙烯基二甲基硅氧烷皮克林乳液、氢二甲基硅氧烷皮克林乳液和卡氏催化剂乳液简单混合，就得到了水性可交联 PDMS/Ti3C2 纳米复合涂层（HTCP）。与溶剂型涂层（HTCS）相比，HTC-P 涂层表面分布的 Ti3C2 更多，这有利于其抗蛋白质粘附和藻类定植。HTC-P 涂层对小球藻的抗藻性分别是 PDMS 涂层和 HTC-S 涂层的近 10 倍和 4 倍。同时，HTC-P 涂层还具有很强的机械性能和去污性能。此外，还讨论了 Ti3C2 纳米片在 HTC-P 涂层表面的分布机理。

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引用次数: 0

Sustainable barrier coatings for paperboard packaging: Effect of VeoVa-10 on 2-EHA and MMA containing water-based emulsions 用于纸板包装的可持续阻隔涂料：VeoVa-10 对含有 2-EHA 和 MMA 的水基乳液的影响

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2024-11-07 DOI: 10.1016/j.porgcoat.2024.108908

Abdul Ghaffar , Rahat Iqbal , Muhammad Tayyab Niaz , Khalid Shafiq , Sonia Zulfiqar , Eric W. Cochran , Syed Muhammad Ismail Hussain Naqvi

Developing environmentally benign barrier coatings may provide a sustainable alternative to the packaging sector and facilitate minimizing the consumption of single-use plastics in packaging. The synthesis of seven different water-based (W/B) emulsions was achieved via seeded emulsion polymerization using 2-Ethylhexylacrylate (2-EHA), methyl methacrylate (MMA), and a varying amount of vinyl ester of Versatic™ acid 10 (VeoVa-10) to impart the hydrophobic properties. Potassium persulfate (K₂S₂O₈) was used as an initiator. Antifoaming agent and biocide were also added to improve the application and shelf-life of these coatings. The coatings were evaluated by conducting various analytical tests, including pH measurement, viscosity assessment, determination of solid content, measurement of drying time, evaluation of gloss, water absorption testing using Cobb's Test, and assessment of oil and grease resistance via the Kit Test. The coatings were also analyzed using advanced characterization techniques, including Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Zetasizer Nano ZS, and contact angle analysis. The results indicated that as the amount of VeoVa-10 increases in barrier coatings, the coated paperboard demonstrated improved moisture and oil/grease resistance compared to the control paperboard (uncoated). Furthermore, the coatings were also applied on paperboard trays and stored at 0 °C and 90 °C to confirm their practical usefulness, a careful examination after an hour showed no leakage/seepage of hot and cold water through the coated trays, unlike the uncoated ones. Barrier coatings offer sustainable and eco-friendly options that could positively impact the packaging industry, helping reduce environmental footprints while enhancing packaging performance.

开发对环境无害的阻隔涂料可为包装行业提供一种可持续的替代品，并有助于最大限度地减少包装中一次性塑料的消耗。使用 2-乙基己基丙烯酸酯 (2-EHA)、甲基丙烯酸甲酯 (MMA) 和不同量的 Versatic™ 酸乙烯基酯 10 (VeoVa-10) 进行种子乳液聚合，合成了七种不同的水基 (W/B) 乳液，以赋予其疏水特性。过硫酸钾（K2S2O8）用作引发剂。此外，还添加了消泡剂和杀菌剂，以改善这些涂料的应用和保质期。通过各种分析测试对涂料进行了评估，包括 pH 值测量、粘度评估、固体含量测定、干燥时间测量、光泽度评估、使用科布测试法进行吸水性测试，以及通过 Kit 测试法评估耐油脂性。此外，还使用先进的表征技术对涂层进行了分析，包括差示扫描量热仪 (DSC)、傅立叶变换红外光谱仪 (FTIR)、扫描电子显微镜 (SEM)、Zetasizer Nano ZS 和接触角分析。结果表明，随着阻隔涂层中 VeoVa-10 含量的增加，与对照纸板（未涂布）相比，涂布纸板的防潮和防油/防油脂性能有所提高。此外，还将涂层涂在纸板托盘上，并将其存放在 0 °C 和 90 °C 的环境中，以确认其实际效用，一小时后的仔细检查显示，涂有涂层的托盘与未涂涂层的托盘不同，没有冷热水渗漏。阻隔涂料提供了可持续发展的环保选择，可对包装行业产生积极影响，有助于减少环境足迹，同时提高包装性能。

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引用次数: 0

Thermally conductive superhydrophobic composite coatings with anti-corrosion property 具有防腐蚀性能的导热超疏水复合涂料

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2024-11-07 DOI: 10.1016/j.porgcoat.2024.108913

Guoyu Ren , Wenjie Zheng , Zeting Qiao , Yun Tuo , Xiaodong Chen , Qiang Zhao , Yajun Bi , Fangyan Du , Xianghu Gao , Shiying Li

The special wettability coating with self-cleaning and anti-corrosion performance can effectively solve the corrosion and coking problems of heat exchange tube, which has attracted much attention. In this work, hydroxylated boron nitride (OH-BNNS) was prepared from hexagonal boron nitride (H-BN) by liquid-phase exfoliation to improve the thermal conductivity. Different sizes of OH-BNNS, modified aluminum nitride (M-AlN) and polytetrafluoroethylene (PTFE) were added into the epoxy resin (EP) to obtain coating suspension, which was sprayed to successfully prepare M-AlN@OH-BNNS/EP superhydrophobic coatings with the thermal conductivity and anti-corrosion. The superhydrophobic coatings had thermal conductivity of 1.454 ± 0.001 W/(m·K), water contact angle (WCAs) of 160.7 ± 1.4° and water sliding angle (WSAs) of 3.3 ± 0.7°. Moreover, it had good adhesion (1 grade), excellent wear resistance (1000 cycles of sandpaper abrasion), self-cleaning and anti-fouling properties. More importantly, the electrochemical results indicated that the impedance modulus of the superhydrophobic coatings was 9.36 × 10¹⁰ Ω·cm² after soaking 3.5 wt% NaCl for 30 d, showing outstanding corrosion resistance. This study presented the application of superhydrophobic coatings in anti-corrosion and heat conduction.

具有自清洁和防腐蚀性能的特殊润湿涂层可有效解决热交换管的腐蚀和结焦问题，因而备受关注。本研究以六方氮化硼（H-BN）为原料，通过液相剥离法制备了羟基氮化硼（OH-BNNS），以提高其导热性能。在环氧树脂（EP）中加入不同尺寸的 OH-BNNS、改性氮化铝（M-AlN）和聚四氟乙烯（PTFE），得到涂层悬浮液，经喷涂成功制备出具有导热和防腐性能的 M-AlN@OH-BNNS/EP 超疏水涂层。超疏水涂层的导热系数为 1.454 ± 0.001 W/(m-K)，水接触角（WCAs）为 160.7 ± 1.4°，水滑动角（WSAs）为 3.3 ± 0.7°。此外，它还具有良好的附着力（1 级）、优异的耐磨性（1000 次砂纸磨损）、自清洁和防污性能。更重要的是，电化学结果表明，在浸泡 3.5 wt% 的 NaCl 30 d 后，超疏水涂层的阻抗模量为 9.36 × 1010 Ω-cm2，显示出卓越的耐腐蚀性。本研究介绍了超疏水涂层在防腐蚀和热传导方面的应用。

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引用次数: 0

Polyurethane nickel lacquer coated carbon fiber cloth with excellent mechanical properties and high electromagnetic shielding performance 聚氨酯镍漆涂层碳纤维布具有优异的机械性能和高电磁屏蔽性能

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2024-11-06 DOI: 10.1016/j.porgcoat.2024.108905

Ke Dai , Haojie Xie , Qianyang Wei , Yanyan Pan , Hao Yang , Hailin Lu

With the development of electronic information and communication technology, electromagnetic waves are everywhere in our lives, so there is an urgent need to develop efficient electromagnetic shielding (EMI) materials to reduce electromagnetic wave pollution. Medical devices, 5G communications, aerospace and other fields require materials that are tough and durable, flexible and thin, have excellent mechanical properties and high-efficiency electromagnetic shielding properties to meet practical needs. In this study, polyurethane (Pur), a lightweight, wear-resistant and stable polymer material, was combined with nickel paint and applied to the surface of 3 k carbon fiber cloth using a tension-pressing machine under high pressure to form a single-sided electromagnetic shielding composite material. Experimental verification shows that the composite sample C5P5CP made by adding 50 wt% polyurethane (Pur) and 50 wt% nickel paint has stable and efficient electromagnetic shielding performance in the entire X-band (8–12 GHz), with an average electromagnetic shielding value of 60 dB. It can exhibit excellent friction performance under variable load friction of 1, 3, 5, 7 and 9 N, and shows the best corrosion resistance in electrochemical experiments. Electromagnetic wave absorption is the main way composite materials shield against electromagnetic waves. This reduces the harm from secondary reflections. The material has a simple manufacturing process and excellent mechanical properties, including lightness, flexibility, and wear resistance. Its efficient electromagnetic shielding performance offers new ideas for designing shielding materials in various fields, and it is expected to have practical applications.

随着电子信息和通信技术的发展，电磁波在我们的生活中无处不在，因此迫切需要开发高效的电磁屏蔽（EMI）材料来减少电磁波污染。医疗器械、5G 通信、航空航天等领域都需要坚韧耐用、柔韧轻薄、具有优异机械性能和高效电磁屏蔽性能的材料来满足实际需求。本研究将轻质、耐磨、稳定的高分子材料聚氨酯（Pur）与镍漆结合，在高压下利用张力压制机将聚氨酯涂覆在 3 k 碳纤维布表面，形成单面电磁屏蔽复合材料。实验验证表明，添加 50 wt%聚氨酯（Pur）和 50 wt%镍漆制成的复合材料样品 C5P5CP 在整个 X 波段（8-12 GHz）具有稳定高效的电磁屏蔽性能，平均电磁屏蔽值为 60 dB。在 1、3、5、7 和 9 N 的可变载荷摩擦下，它都能表现出优异的摩擦性能，并在电化学实验中表现出最佳的耐腐蚀性能。电磁波吸收是复合材料屏蔽电磁波的主要方式。这可以减少二次反射带来的危害。这种材料的制造工艺简单，具有优异的机械性能，包括轻质、柔韧和耐磨。其高效的电磁屏蔽性能为各领域屏蔽材料的设计提供了新思路，有望得到实际应用。

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引用次数: 0

Recent development of special wettability filtration membrane for selective oil/water separation applications: A review 用于选择性油/水分离应用的特殊润湿性过滤膜的最新发展：综述

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2024-11-04 DOI: 10.1016/j.porgcoat.2024.108885

Yaxin Zheng , Fei Sun , Pengjin Zeng , Yi Su

The separation of oil/water mixture or emulsion is an important field, which is of significance to solve the problem of oily wastewater. Many oil/water separation methods and techniques have been widely studied. Due to its convenience of operation and efficiency, membrane separation has been known as the most promising method for the effective treatment of wastewater. Among various materials for the membrane preparation, the research of polymer-based membrane has become the focus of the research. In this review, the research progress of membranes on liquid filtration was systematically reviewed from the principle of wetting and filtration mechanism, to selective wettability membranes, including conventional wetting membranes (superhydrophobic membranes and hydrophilic-underwater oleophobic membranes), special wetting membranes (stimulus response membranes and asymmetric wetting Janus membranes) and other multi-functional composite membranes. Finally, the main challenges that need to be addressed and future research directions of filtration membranes are briefly discussed, which can provide new ideas for the structural design of liquid filtration materials for light industrial manufacturing, wastewater treatment, etc., as well as a better understanding of the limitations of this promising research area.

油/水混合物或乳液的分离是一个重要领域，对解决含油废水问题具有重要意义。许多油水分离方法和技术已被广泛研究。膜分离法因其操作方便、效率高而被认为是最有前途的有效处理废水的方法。在各种膜制备材料中，聚合物基膜的研究已成为研究的重点。本综述从润湿原理、过滤机理，到选择性润湿膜，包括常规润湿膜（超疏水膜和亲水-疏水-疏油膜）、特殊润湿膜（刺激反应膜和非对称润湿 Janus 膜）以及其他多功能复合膜，系统回顾了液体过滤膜的研究进展。最后，简要讨论了过滤膜需要应对的主要挑战和未来的研究方向，为轻工业制造、废水处理等液体过滤材料的结构设计提供了新思路，同时也让人们更好地了解这一前景广阔的研究领域的局限性。

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引用次数: 0

Synthesis of a photocrosslinkable polyimide with a chalcone side chain and its properties as a coating material for a secondary battery separator 具有查尔酮侧链的可光交联聚酰亚胺的合成及其作为二次电池隔膜涂层材料的性能

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2024-11-04 DOI: 10.1016/j.porgcoat.2024.108904

Jin-Hee Noh , Jineun Lee , Giseop Kwak

A carboxyl-containing polyimide (PI) was synthesized with a flexible main chain. Then, a polymer reaction was conducted to introduce a chalcone side chain. The polymer reaction occurred stoichiometrically, and a high yield of the resulting photocrosslinkable polyimide (PI-Ch) polymer was obtained (91 %) along with a high molecular weight of 9.4 × 10⁴ g/mol. The PI-Ch had a density of 1.15 g/cm³, a fractional free volume of 0.20, and a solubility parameter of 18.8 MPa^1/2. Due to its low polarity, the PI-Ch was very soluble in a moderately polar, low-boiling-point solvent of THF. Moreover, the temperature required to promote 5 % weight loss was quite high at 383 °C, while the glass transition temperature was relatively low at 146 °C. The THF solution was considered to be optimal for the dip-coating method and was applied to PE separator coating. The ATR-mode FTIR analysis of the separator coated with a 1 wt% PI-Ch solution showed that the PI-Ch was coated extensively on the surface of the PE separator. Further, the photodimerization reaction of the chalcone side chain via UV irradiation was successful. The PE separator had a thermal shrinkage of 46 % before coating, which decreased to 29 % after coating and UV treatment. When coated with a 3 wt% PI-Ch solution, some of the pores in the separator were blocked, while the air permeability and average pore size also decreased. All the pores appeared blocked after coating with the 5 wt% PI-Ch solution.

一种含羧基的聚酰亚胺（PI）被合成出来，其主链具有柔韧性。然后，进行聚合物反应以引入查尔酮侧链。聚合物反应按一定比例进行，得到的光交联聚酰亚胺（PI-Ch）聚合物收率高（91%），分子量高（9.4 × 104 g/mol）。PI-Ch 的密度为 1.15 g/cm3，自由体积分数为 0.20，溶解度参数为 18.8 MPa1/2。由于极性较低，PI-Ch 在中等极性、低沸点溶剂 THF 中的溶解度很高。此外，促进 5% 失重所需的温度相当高，为 383 °C，而玻璃化温度相对较低，为 146 °C。THF 溶液被认为是浸涂法的最佳溶液，并被应用于聚乙烯分离器涂层。对涂覆了 1 wt% PI-Ch 溶液的分离器进行的 ATR 模式傅立叶变换红外分析表明，PI-Ch 被广泛涂覆在聚乙烯分离器表面。此外，通过紫外线照射，查尔酮侧链的光二聚化反应也取得了成功。聚乙烯隔膜在涂覆前的热收缩率为 46%，涂覆和紫外线处理后收缩率降至 29%。在涂覆 3 wt% 的 PI-Ch 溶液后，分离器中的一些孔被堵塞，同时透气性和平均孔径也减小了。涂覆 5 wt% PI-Ch 溶液后，所有孔隙都被堵塞。

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引用次数: 0

Micropatterned CuS@PDMS films with anti-adhesive property for photothermal sterilization 用于光热灭菌的具有抗粘附特性的微图案 CuS@PDMS 薄膜

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2024-11-04 DOI: 10.1016/j.porgcoat.2024.108909

Woosuk Chung , Byunghwan Lee , Younghun Kim

This study presents the development of micropatterned polydimethylsiloxane (PDMS) films with hollow CuS NPs (p-CuS@PDMS) designed for both anti-adhesive and photothermal sterilization applications. Hollow CuS nanoparticles (NPs) synthesized via the Kirkendall effect were incorporated into PDMS films to enhance the photothermal conversion. Micropatterning, achieved through a yogurt lid templating method, increased surface roughness and hydrophobicity and significantly reduced bacterial adhesion. The improved anti-adhesive properties were demonstrated by water contact angle measurements, which showed an increase of 24° from 103° to 127° for the micropatterned p-CuS@PDMS films. Under near-infrared (NIR) irradiation, the p-CuS@PDMS films achieved a temperature increase of 91 °C with a photothermal conversion efficiency of 73 %, which is much higher than the 61 °C achieved by plain PDMS. The presence of CuS NPs in the PDMS matrix improved the bacterial inactivation rates, with p-CuS@PDMS achieving a 99 % bacterial kill rate after 90 s of irradiation. Although the anti-adhesive properties were influenced more by micropatterning, the combination of CuS and micropatterning provided a synergistic effect. These results demonstrate the potential of p-CuS@PDMS films for applications in healthcare and packaging, where effective sterilization and bacterial resistance are critical.

本研究介绍了具有空心 CuS NPs（p-CuS@PDMS）的微图案聚二甲基硅氧烷（PDMS）薄膜的开发情况，该薄膜设计用于防粘和光热杀菌应用。通过 Kirkendall 效应合成的中空 CuS 纳米粒子（NPs）被纳入 PDMS 薄膜，以增强光热转换。通过酸奶盖模板法实现的微图案化增加了表面粗糙度和疏水性，显著降低了细菌粘附性。水接触角测量结果表明，微图案化 p-CuS@PDMS 薄膜的抗粘附性从 103°提高到 127°，提高了 24°。在近红外（NIR）照射下，p-CuS@PDMS 薄膜的温度升高了 91 ℃，光热转换效率达到 73%，远高于普通 PDMS 的 61 ℃。PDMS 基质中 CuS NPs 的存在提高了细菌的灭活率，在照射 90 秒后，p-CuS@PDMS 的细菌杀灭率达到 99%。虽然抗粘附性能更多地受到微图案化的影响，但 CuS 与微图案化的结合产生了协同效应。这些结果证明了 p-CuS@PDMS 薄膜在医疗保健和包装领域的应用潜力，在这些领域中，有效的灭菌和抗细菌性是至关重要的。

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引用次数: 0

Interlaminar shear properties of carbon fiber/nylon 6 composites reinforced with GO-modified waterborne polyurethane sizing agent prepared by in situ polymerization 用原位聚合法制备的 GO 改性水性聚氨酯施胶剂增强的碳纤维/尼龙 6 复合材料的层间剪切性能

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings

Pub Date : 2024-11-04 DOI: 10.1016/j.porgcoat.2024.108900

Mengxiang Liu , Mingke Xu , Jiaqi Zhou , Guodong Zhang , Jianan Ding , Pingxin Liu , Junwei Yu , Chengrui Di , Kun Qiao

To enhance the interfacial bonding of carbon fiber/nylon 6 thermoplastic composites, this study successfully grafted isophorone diisocyanate onto the surface of graphene oxide by leveraging the reactivity of isocyanate and hydroxyl groups. This modified graphene oxide was then grafted onto the waterborne polyurethane molecular chain via in-situ polymerization, resulting in a graphene oxide-modified waterborne polyurethane sizing agent. The study investigated the effect of graphene oxide content on the thermal properties and water resistance of the waterborne polyurethane materials, as well as the effect of graphene oxide content on the interlayer shear properties of carbon fiber nylon 6 composites prepared by graphene oxide modified waterborne polyurethane as sizing agent was also studied. Results showed that the thermal stability and water resistance of the waterborne polyurethane material were progressively enhanced with increasing graphene oxide content. Furthermore, at a graphene oxide content of 0.7 %, the interlaminar shear strength of carbon fiber/nylon 6 composites reached 65.0 MPa, which is 92.8 % higher than that of composites using commercial epoxy resin sizing agents. The enhancement mechanism of interlaminar shear strength was further analyzed, providing important theoretical guidance and a feasible strategy for developing high-performance sizing agents.

为了增强碳纤维/尼龙 6 热塑性复合材料的界面粘合力，本研究利用异氰酸酯和羟基的反应活性，成功地将异佛尔酮二异氰酸酯接枝到氧化石墨烯表面。然后通过原位聚合将这种改性氧化石墨烯接枝到水性聚氨酯分子链上，从而得到了氧化石墨烯改性水性聚氨酯施胶剂。该研究考察了氧化石墨烯含量对水性聚氨酯材料热稳定性和耐水性的影响，还研究了氧化石墨烯含量对以氧化石墨烯改性水性聚氨酯为施胶剂制备的碳纤维尼龙 6 复合材料层间剪切性能的影响。结果表明，随着氧化石墨烯含量的增加，水性聚氨酯材料的热稳定性和耐水性逐渐增强。此外，当氧化石墨烯含量为 0.7 % 时，碳纤维/尼龙 6 复合材料的层间剪切强度达到 65.0 MPa，比使用商用环氧树脂施胶剂的复合材料高 92.8 %。进一步分析了层间剪切强度的增强机理，为开发高性能施胶剂提供了重要的理论指导和可行的策略。

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