聚合物基超疏水涂层的制备及应用进展(1)

简要综述了超疏水表面的疏水机制及聚合物基超疏水涂层的基本情况(包括常用材料、制备方法及应用),重点阐述了聚合物基超疏水涂层的制备方法(如模板法、相分离法、刻蚀法和聚合物/无机纳米粒子复合法等)及其在自清洁、油水分离、抗冰冻和抗菌等领域的研究进展和存在的问题。最后对聚合物基超疏水涂层的应用前景进行了展望。     

聚合物基超疏水涂层的制备及应用进展(2)

简要综述了超疏水表面的疏水机制及聚合物基超疏水涂层的基本情况(包括常用材料、制备方法及应用),重点阐述了聚合物基超疏水涂层的制备方法(如模板法、相分离法、刻蚀法和聚合物/无机纳米粒子复合法等)及其在自清洁、油水分离、抗冰冻和抗菌等领域的研究进展和存在的问题。最后对聚合物基超疏水涂层的应用前景进行了展望。     

含氟聚合物纳米SiO2复合涂层的制备及性能研究

以1-甲基丙烯酰氧基丙基三甲氧基硅烷(MPTMS)、N-甲基全氟辛基磺酰基胺基丙烯酸乙酯(MPSAEA)、甲基丙烯酸甲酯(MMA)共聚，然后利用原位复合技术引入纳米SiO2微粒，制备了均匀透明的SiO2纳米复合含氟聚合物材料。用红外光谱(FT—IR)、透射电镜(TEM)和电子衍射(ED)等表征了复合材料的形貌和结构。将聚合物用做涂层材料，用扫描电镜(SEM)、X-射线光电子能谱(XPS)、接触角测定仪和显微硬度仪测定了涂层的形貌、涂层表面的化学成分、涂层与水的接触角随时间的变化、涂层的硬度变化，结果表明纳米复合聚合物可在玻片表面形成均匀光滑的涂层，涂层表面纳米SiO2和含氟成分共同存在，纳米SiO2复合涂层在室外放置半年以后仍保持良好的疏水性，并且纳米复合聚合物涂层的硬度随含氟单体含量的增加而增加。     

混凝土新型表面防护材料研究进展

混凝土表面防护材料能适用公路、海洋、桥梁等复杂使用条件下的混凝土结构防护。混凝土表面防护材料按照成分不同可分为传统聚合物材料、改性聚合物材料、疏水浸渍材料。为适应恶劣工况防护需要,研制开发具有综合性和环保性的新型表面防护材料:玻璃鳞片参合聚合物涂层材料、水泥基渗透防护材料、新型有机硅防护材料以及自修复涂层材料。     

文献摘要

正国内文献摘要非自粘接涂层材料液体粘性涂层材料被制备出来用于保护表面,即保护如医疗器械的表面和包括皮肤与粘膜等的生物表面免受压力、剪切力与摩擦力。液体粘性涂层材料利用一种溶于挥发性溶剂的两亲性的包含硅氧基硅烷/羟烷基酯聚合物涂层材料,在具有或不具有抗微生物剂条件下,当该聚合物涂层在溶剂蒸发后形成时,其依靠自身折叠或依靠另一材料放置,该涂层     

两亲可降解聚酯涂层的制备及性能研究

利用两亲聚合物引发己内酯开环聚合制备了两亲可降解聚合物。通过 X射线光电子能谱、原子力显微镜、水接触角等测试分析了材料的表面元素及表面性质，同时进一步通过附着力测试、抗蛋白吸附测试等抗藻类黏附测试来评估聚合物涂层的综合性能。结果表明：该涂层与基体的附着力较好，并能在水下保持长期稳定性，且蛋白质在涂层表面的吸附量几乎为零，表现出良好的抗蛋白质性能，同时，该材料还具有优异的抗藻类黏附性能。这种新型的两亲聚合物对海洋防污涂料的发展具有重要的意义。     

纳米复合含氟聚合物的制备及其涂层性能研究

以γ-甲基丙烯酰氧基丙基三甲氧基硅烷(MPTMS)、N-甲基全氟辛基磺酰基胺基丙烯酸乙醇(MPSAEA)、甲基丙烯酸甲酯(MMA)共聚，利用原位复合技术引入纳米SiO2微粒，制备了均匀透明的SiO2纳米复合含氟聚合物材料。用红外光谱(FT-IR)表征了复合材料的结构。将聚合物用做涂层材料，用扫描电镜(SEM)、原子力显徽镜(AFM)、接触角测定仪和紫外可见吸收光谱仪表征和测定了涂层的形貌、涂层与水的接触角和涂层的透光率。结果表明：纳米复合聚合物可在玻片表面形成均匀光滑的涂层，其厚度约1μm，纳米SiO2的引入显著提高了涂层的疏水性，且纳米复合聚合物涂层具有优良的透光率。     

阻抗蛋白质吸附材料研究进展

蛋白质是两亲大分子,对材料表面具有亲和性,易被吸附并污染材料。阻抗蛋白质吸附的无污染表面在生物医药、船体涂层、生物芯片等领域具有广泛重要的应用。本文对聚合物材料表面阻抗蛋白质吸附的机理进行了归纳,介绍了阻抗蛋白质吸附的材料制备及表面修饰的相关研究进展。     

新型含氟聚合物防污涂层的制备及性能研究

以不同体积比的反应单体甲基丙烯酸十二氟庚酯(DFMA),甲基丙烯酸甲酯(MMA)分别与3-烯丙基-5,5-二甲基海因(ADMH)聚合成无规共聚物涂层。红外光谱(IR),核磁1H谱和19F谱表征了聚合物涂层的分子结构;接触角测量仪和X射线光电子能谱(XPS)分析了共聚物涂层表面性能。通过动态模拟海上挂板实验,探讨了星球藻(Asterocapsa trochiscioides)在聚合物涂层表面的黏附情况。结果表明,低表面能的全氟烷基在涂层两面的分布差异明显,造成了涂层两面的疏水和黏附性有较大差别;随着含氟单体用量的增加,聚合物涂层两面的接触角增加,星球藻在涂层表面的黏附程度下降。     

00813542.8 浸渍玻璃纤维辫和包含该红维辫的制品

本发明提供一种至少部分涂覆的纤维辫．它包含多根玻璃纤维，在至少一根所述纤维的至少一部分表面上涂有一种可与树脂相容的涂层组合物．该涂层组合物包含：(a)多个片状无机颗粒和(b)至少一种聚合物材料。本发明还提供可与树脂相容的涂层组合物．该组合物包含(a)多个离散颗粒．由选自非热膨胀有机材料、无机聚合物材料、非热膨胀复合材料及其混合物中的材料制得，     

Electropolymerized bilayer coatings of polyaniline and poly(N-methylaniline) on mild steel and their corrosion protection performance

Polyaniline (PANI) and poly(N-methylaniline) (PNMA) have been electrodeposited on mild steel from oxalic acid bath using cyclic voltammetric technique. Pretreatments like passivation and primer polymer coatings were required for effective coating. Differently stacked composite polymer layers on the metal surface by layer-by-layer approach have also been obtained and their properties have been compared with their corresponding copolymer coatings. FTIR study confirms the formation of electroactive polymer compounds on mild steel. Evaluation of these coatings in 3.5% NaCl solution by potentiodynamic polarization and electrochemical impedance spectroscopy reveals significant corrosion resistant behavior. Relatively higher corrosion protection is exhibited by copolymer coatings and composite-bilayer coatings than the corresponding homopolymer coatings. The composite metal–PANI–PNMA layer shows higher stability and better protection than the metal–PNMA–PANI layer.     

Investigation of morphological and electrical properties of the PMMA coating upon exposure to UV irradiation based on AFM studies

The objective of study was to investigate the influence of UV irradiation on morphological changes of a polymeric surface and its electrical properties. In the presented investigation thin poly(methyl methacrylate) (PMMA) film was applied onto iron substrate by solution casting method. UV-C irradiation in range of 200–280 nm was used as a deteriorative factor to induce polymer degradation. Atomic force microscopy (AFM) method was employed to study surface topography of the PMMA coatings before and after exposure to UV-illumination. Photo-induced changes in the polymer surface taking form of microcracks were illustrated by AFM images. In order to support results obtained with AFM method, electrochemical impedance spectroscopy (EIS) measurements were conducted. The authors chose this technique to confirm whether the changes on UV-exposed PMMA surface observed on AFM images could indicate potential sites of the polymer coating long before serious damage could occur. Both methods EIS and AFM were used in order to provide information about durability of PMMA film.     

核壳型纳米SiO2-聚丙烯酸酯复合乳液的制备及应用

本文根据核壳乳液聚合理论,以硅烷偶联剂表面处理的纳米S iO2为种子,采用优化的乳液聚合工艺,制备核壳型纳米S iO2-聚丙烯酸酯复合乳液,并以其为基料制备建筑涂料。实验结果表明,纳米S iO2经硅烷偶联剂表面处理后,提高了其在聚合体系中的分散稳定性和与聚合物的相容性。所制备的复合乳液粒子具有核壳结构,以其为基料制备的建筑涂料的耐沾污性、耐洗刷性和耐候性等性能大大高于国家标准中优等品的水平。     

Polymer brush coatings for combating marine biofouling

A variety of functional polymer brushes and coatings have been developed for combating marine biofouling and biocorrosion with much less environmental impact than traditional biocides. This review summarizes recent developments in marine antifouling polymer brushes and coatings that are tethered to material surfaces and do not actively release biocides. Polymer brush coatings have been designed to inhibit molecular fouling, microfouling and macrofouling through incorporation or inclusion of multiple functionalities. Hydrophilic polymers, such as poly(ethylene glycol), hydrogels, zwitterionic polymers and polysaccharides, resist attachment of marine organisms effectively due to extensive hydration. Fouling release polymer coatings, based on fluoropolymers and poly(dimethylsiloxane) elastomers, minimize adhesion between marine organisms and material surfaces, leading to easy removal of biofoulants. Polycationic coatings are effective in reducing marine biofouling partly because of their good bactericidal properties. Recent advances in controlled radical polymerization and click chemistry have also allowed better molecular design and engineering of multifunctional brush coatings for improved antifouling efficacies.     

涂料用聚(酯-酰胺)超支化聚合物合成与性能研究

以苯酐和含氮二元醇为原料，合成了聚(酯-酰胺)结构的超支化聚合物。对得到的聚合物的结构用红外光谱、差热分析等方法进行了表征，测定了聚合的相对分子质量，并用油酸与聚合物的端羟基反应，得到适用于涂料的树脂。研究了树脂溶液的流变性及以聚氨酯为固化剂配制成的涂料的涂膜性能，结果表明，该涂料可在室温下快速固化，得到的涂层具有很好的漆膜性能。     

The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats

The aim of this study was to investigate the influence of different components of interpenetrating polymer networks (IPNs) on their behavior in dual curing automotive applications. Dual curing is one of possible ways to obtain fast curing, scratch resistant coatings for use in OEM and car refinish applications. Dual curing systems, upon hardening, represent interpenetrating networks (IPNs) [1]. IPN's were obtained using novel acrylate-terminated hyperbranched polyester with high functionality and compared to classical 2-pack polyurethane clear coat.     

Characterization of ultrathin electroactive films synthesized via the self-limiting electropolymerization of o-methoxyaniline

The electropolymerization of o-methoxyaniline under self-limiting deposition conditions yields ultrathin (<20 nm) coatings of an insoluble, low-molecular-weight polymer on planar indium-tin-oxide electrode substrates. The self-limiting nature of the electropolymerization is achieved by using citrate-buffered aqueous electrolytes (pH 4.7) in which the developing polymer that deposits at the electrified interface is neither conductive nor permeable to monomer. Although non-conductive as electrodeposited, the resulting poly(o-methoxyaniline) coating becomes electroactive when transferred to acidic aqueous electrolytes. The morphology and chemical structure of the poly(o-methoxyaniline) coatings are characterized by surface-sensitive methods including atomic force microscopy, specular-reflectance infrared spectroscopy, X-ray photoelectron spectroscopy, and electrochemistry. Fundamental understanding of the structure/property relationships derived from these investigations on planar substrates will ultimately be applied to three-dimensional electrode nanoarchitectures that incorporate such electroactive coatings for enhanced charge-storage functionality.     

Polymer Masks Fabrication by Micropatterning Surfaces of Composite Polymer Coatings

Abstract

Micropatterning of surfaces has been demonstrated using composite polymer coatings of PS and PMMA of equal molecular weights in different volume proportions with varying surface topographies on silicon surfaces. The creation of PMMA masks with various surface morphological features has also been demonstrated by removal of PS from the composite coatings using cyclohexane. Atomic force microscopy (AFM) investigations revealed that the surface pattern and the dimensions of these masks significantly changed with the change in the volume proportions of each homopolymer. The composite coatings of 20/80 vol% PS/PMMA, 50/50 vol% PS/PMMA, and 80/20 vol% PS/PMMA resulted in PMMA masks with holes (depth ～300 nm), wrinkles (height ～350 nm) and pillars (height ～600 nm), respectively. Surface compositional analysis carried out using FTIR and XPS investigations confirmed the presence of polymer coatings of PS, PMMA and PS/PMMA. XPS investigations also confirmed the successful removal of PS from the PMMA mask by showing the presence of the silicon substrate on those masks where PS was previously present. The water contact angle of the composite polymer masks ranged from 70 to 90° which increased with the increase of PS vol% in the composite. The wetting behavior of certain PMMA masks showed hydrophobicity with water contact angle values above 90°.     

Superhydrophobic polymeric coatings produced by rapid expansion of supercritical solutions combined with electrostatic deposition (RESS-ED)

In this paper we present a method to produce superhydrophobic polymeric coatings by combining the rapid expansion of supercritical solutions (RESS) with electrostatic deposition (ED). A copolymer, poly(vinyl acetate)–poly(vinyl pivalate) was dissolved in a mixture of supercritical carbon dioxide and acetone and sprayed through a nozzle with an applied voltage of 8 kV onto a surface placed on a earthed collector. Spray distance and polymer concentration were altered to find the most suitable spraying conditions. Superhydrophobic surfaces were produced when spraying both with and without a voltage, although the water repellent surfaces could be produced at a larger variety of processing parameters using the RESS-ED technique. The greatest improvement of using the RESS-ED process was that larger and thinner coatings were produced with a more even surface coverage of the created polymer particles compared to spraying without the applied voltage.     

Properties of gas detonation ceramic coatings and their effect on the osseointegration of titanium implants for bone defect replacement

An optimal performance of bone implants with bioceramic coatings is closely related to the surface modification technology. For the first time, we have evaluated a gas detonation deposition (GDD) approach to obtain biocompatible ceramic coatings based on bioglass (BG) and calcium phosphates on Ti-based alloys as prospective materials towards their application for the development of bone implants. For the production of the coatings, hydroxyapatite (HA), HA metal-substituted (containing Ag⁺, Cu²⁺, or Zn²⁺) and tricalcium phosphate (TCP) were synthesized and characterized. Pure powders and their combination with BG were used to obtain coatings on a Ti–6Al–4V alloy using the developed automatized GDD setup. The microstructure, phase and chemical composition of the produced coatings were studied using XRD, SEM-EDS and Raman spectroscopy. The produced coated materials were evaluated in vivo in Wistar rats to analyze a reparative osteogenesis over a period of 12 weeks. The results regarding the optimization of the GDD method indicate its high productivity, as confirmed by high deposition rates. The highest deposition rate was observed for the coatings obtained from the HA metal-substituted powders. The results revealed a partial transformation of a HA phase to an α-TCP phase during the deposition, with a prevalence of the HA-phase in the coatings. According to the histological evaluation, the reparative osteogenesis occurs through the perimeter of the titanium implants, whereas the regeneration level increases from the 4th to the 12th week. The highest osteointegration level was detected for the implants coated with a biocomposite consisting of BG, HA and TCP. The results of the current study demonstrate an effectiveness of the GDD method to produce biocompatible coatings on Ti-based alloys. This provides excellent prerequisites towards the application and standardization of the GDD technology to manufacture bone implants for bone fixation and defect replacement, as well as the development of dental implants.