镁合金腐蚀研究进展(37)—硅烷水解度对水滑石硅烷复合涂层耐蚀性能的影响 水滑石类化合物(LDH)是一类具有层状结构的无机功能材料。LDH的主体层板化学组成与其层板阳离子性质、层板中间阴离子、阴离子交换量和超分子结构等因素密切相关。镁铝碳酸根型水滑石化学通式为：Mg 6 Al 2 (OH) 16 CO 3 ·4H 2 O，具有层间阴离子的可交换性、热稳定性能、组成和结构的可调控性等特点。 有机硅烷的分子结构式一般为:R-Si(OR) 3 (Si-OR为硅烷氧基)。硅烷氧基对无机物具有反应性，也可以与一些有机官能团结合。有机硅烷水解产生的Si-OH一方面可以进行自缩聚形成Si-O-Si网状结构，另一方面能够与水滑石表面的羟基进行结合。因此，Si-OH的浓度势必会影响着有机硅烷与水滑石的结合。 在本工作中，使用共沉淀-水热法合成在镁合金AZ31上制备出镁铝碳酸根水滑石，再用浸渍法在不同配比的硅烷、乙醇和超纯水的混合溶液（3:20:10, 3:15:15和3:10:20）中制备出水滑石/硅烷改性的复合涂层。 图1 涂层结构示意图 Fig. 1 Schematic representation of the coating formation mechanism of the composite coatings. 研究发现，3:10:20比例的溶液具有最高的硅烷水解度，对应制备出的LDH/PMTMS-3涂层具有最好的耐蚀性和表面致密性涂层具有超疏水性能，接触角达150.5°，可以有效地隔绝水溶液的侵蚀。而对于另外两种复合涂层（3:20:10, LDH/PMTMS-1涂层和3:15:15, LDH/PMTMS-2涂层），两者表面均不致密，内层水滑石形貌清晰可见，耐腐蚀性相比于LDH/PMTMS-3涂层较差，但比水滑石涂层或者AZ31基体较好。这两种复合涂层也未达到超疏水效果，接触角分别为120.5°和131.5°。因此，LDH/PMTMS-3涂层作为耐蚀涂层实际应用前景。 该项工作 “Corrosion resistance of Mg(OH) 2 /Mg–Al-layered double hydroxide coatings on magnesium alloy AZ31: influence of hydrolysis degree of silane” 在线发表在 《Rare Metals》(2019). https://doi.org/10.1007/s12598-019-01234-1. 第一作者为研究生姚青松，通讯作者为张芬、曾荣昌。 Fig. 2 FE-SEM of (a) LDH coating, (b) LDH/PMTMS-1 coating, (c) LDH/PMTMS-2 coating and (d) LDH/PMTMS-3 coating Fig. 3 FT-IR spectra of (a) silane solutions: Solution 1 (3:20:10, V / V / V ), Solution 2 (3:15:15, V / V / V ), Solution 3 (3:10:20, V / V / V ); FT-IR spectra of (b) LDH coating, LDH/PMTMS-1 coating, DH/PMTMS-2 coating and LDH/PMTMS-3 coating. 图4 XPS 图谱 Fig. 4 XPS survey scan of (a) LDH/PMTMS-3 coating, (b) Mg peaks, (c) C peaks, (d) O peaks and (e) Si peaks. 图5 极化曲线 Fig. 5 Polarization curves of the (a) AZ31 alloy, (b) LDH coating, (c) LDH/PMTMS-1 coating, (d) LDH/PMTMS-2 coating and (e) LDH/PMTMS-3 coating. 图6 析氢曲线 Fig. 6 (a, b) Hydrogen evolution volume and (a, b) hydrogen evolution rate (HER) as a function of the immersion time for (I) AZ31 alloy, (II) LDH coating, (III) LDH/PMTMS-1 coating , (IV) LDH/PMTMS-2 coating and (V) LDH/PMTMS-3 coating in 3.5 wt. % NaCl solution for 480 h. Fig. 7 Schematic representation of corrosion mechanism of the composite coatings.
镁合金腐蚀研究进展(35)—热处理对层层组装多层膜的影响 目前限制医用镁及镁合金应用的主要障碍是其局部腐蚀和降解速率过快，这可能会在骨损伤完全愈合之前损害植入体的机械完整性。同时，可能产生的生物材料表面细菌生物膜也会导致植入体在应用中提前失效。可以采用表面改性和抗菌元素合金化等诸多方法来同时解决以上两个问题。 为了探索医用镁合金表面抗菌途径，一种方法是将抗生素嵌入镁合金表面涂层。基于荷正、负电荷聚电解质的静电吸引， 通过所谓层层组装（layer-by-layer (LbL) assembly）方法 交替地产生静电沉积 来制备聚电解质多层膜（PEMs）。多层膜可以作为耐腐蚀的物理屏障。 可以选用聚烯丙胺盐酸盐（PAH）、聚丙烯酸（PAA）和硫酸庆大霉素（GS）作为镁表面功能化的组装单元。PAH可以荷正电，具有良好的生物相容性。而PAA可以荷负电，并且已被广泛应用于生物医学领域。除了这两种聚电解质外，GS是一种对抗大多数革兰氏阳性和革兰氏阴性细菌的有效抗生素，可以被掺入PEMs中，以提高植入体的抗菌性能。 然而，由于GS与其他荷电组装单元的弱结合力，将抗生素直接负载到PEMs中不容易实现。而且，腐蚀介质也可以穿透多层膜使得抗菌剂快速释放，这不满足医用镁合金长期抗菌性能的要求。 在本工作中，使用旋涂辅助层层组装技术（SLbL assembly）在镁合金表面成功地组装了GS负载的聚电解质多层膜。重点研究了多层膜热处理（HT），以提高了其耐腐蚀性并延长GS的释放时间。 研究发现，不同PAA分子的羰基可以通过热处理交联形成稳定的酸酐键。HT-(PAH/PAA-GS) 10 热处理 膜的腐蚀电流密度比(PAH/PAA-GS) 10 未经热处理膜降低了一个数量级。这表明，热处理可以提高多层膜的耐腐蚀性能。同时，该热处理多层膜对金黄色葡萄球菌具有良好的抗菌活性，而且可以延长释放时间。此外，在长时间浸泡于腐蚀介质中时，HT-(PAH/PAA-GS) 10 膜可促进羟基磷灰石的形成。本防腐 抗菌 多层涂层在医用镁合金领域具有应用前景。 该项工作近日在线 发表 在 Journal of Colloid Interface Science （ 547 (2019) 309–317. https://doi.org/10.1016/j.jcis.2019.04.017 ），论文第一作者为硕士研究生赵延斌，通讯作者为李硕琦和曾荣昌。 此文系即将毕业的赵延斌的第5篇SCI论文。5篇文章包括2篇 Journal of Colloid Interface Science (IF5.091) 、1 篇 Applied Surface Science（ IF4.439, 2018 ，ESI 高被引 ）、1 篇 Materials Letters （2019）和1篇 Acta Metallurgica Sinica (2018，Engl. lett.) 。 最后一篇去年获得中国金属学会颁发的优秀论文。 Corrosion resistance and drug release profile of gentamicin-loaded polyelectrolyte multilayers on magnesium alloys: Effects of heat treatment Abstract Magnesium (Mg) alloys have received considerable attentions as the emerging biodegradable implant materials in orthopedic surgery applications. However, the rapid corrosion rate and the susceptibility to bacterial infection have prevented their wide spread applications to date. In this work, the gentamicin-loaded multilayers have been constructed on Mg alloys through spin-assisted layer-by-layer (SLbL) assembly. Heat treatment is applied for improving the corrosion resistance and prolonging the drug release profile. In addition, the treated multilayer can promote the formation of hydroxyapatite (HA) during the long-time immersion in Hank’s balanced salt solution (HBSS). Graphical abstract Keywords Magnesium alloy；Layer-by-layer；Heat treatment；Corrosion resistance；Antibacterial property；Sustained release 链接： 镁合金腐蚀研究进展系列 曾荣昌发表论文目录（ Rong-Chang Zeng\\'s Publications）(2000-)
镁合金表面自愈合涂层进展 所谓自愈合涂层是指涂层遭受一定的破坏时，在外界未输入（或少量）影响，能够对受损区进行一定的自我修复，从而达到继续保护基体或恢复特定功能的涂层。 狭义上而言，涂层自愈合是对涂层本身的修复，即利用修复剂的反应；从广义 上讲，涂层自愈合也可以是对涂层功能（尤指防腐蚀）的恢复，主要利用缓蚀剂。 自愈合涂层能够一定程度地修复表面涂层的损伤，延长涂层的使用寿命，因此，广泛应用于镁合金表面处理领域。结合经典的自愈合涂层模型和理论，综述了镁合金表面自修复涂层的最新相关研究成果。 铬酸盐转化膜是一种最典型的化学转化膜，其利用修复剂之间的化学反应来达到修补涂层损伤的目的，工艺简单，容易实现，但其修复涂层效果极大地受到修复剂填埋量的影响。以微囊微管为代表的微容器型自愈合涂层进一步丰富了自愈合涂层的设计理念，但因其工艺相对复杂、缓蚀剂装载量有限等问题也颇受限制，而利用多孔材料装载修复剂的等类微容器涂层是近期比较新颖的涂层设计思路。最新的研究工作则主要围绕多功能化的自修复复合涂层展开，自愈合效果往往只是复合涂层的一部分功能，也不再是对于涂层本身的修复，而更加注重利用涂层本身与腐蚀产物的共同作用达到对涂层功能的修复；无机类与聚合物类修复剂复合使用，共同增强自愈合效果。另外，根据实际应用条件设计的触发式自愈合，更贴近现 实。 此文刊载于《表面技术》2019第三期 由重庆大学教授潘复生院士负责的 专题—镁合金腐蚀与防护。2019,48(3):1-9. DOI： 10.16490/j.cnki.issn.1001-3660.2019.03.001 图1 复合涂层结构及自修复机理示意图 Fig. 1 Schematic diagram of SSLbL coating structure and self-healing mechanism Ref : ZHAO Y B, et al. Materials letters, 2019, 237: 14-18. Recent Development of Self-healing Coating on Magnesium Alloys: A Review Self-healing coating has been widely applied into surface treatment of magnesium alloys, due to the fact that it can repair the mechanical damage and prolong the in-service life. Based on classical self-healing coating models and theories, the cutting-edge researches of self-healing coatings on magnesium alloys are reviewed. Chromate chemical conversion coating, one of chemical conversion coatings, is used to renew itself by inhibitors. This method is simple and easy to implement, but it is highly affected by the amount of corrosion inhibitors. The micro-container self-healing coatings, such as microcapsule and microtubules, enrich design concept of self-healing coatings, but it is also limited due to the relatively complicated process and the loadings of inhibitor. Recently, porous materials are used as micro-container, which is a novel coating design concept. Multifunctional composite coatings are the focus in recent research, and self-healing effect is usually only one of its functions. New self-healing coatings not only focus on multi-functional composite coatings, but also pay more attention to repair functions. Inorganic and polymer-based healing agents are usually combined to enhance self-healing effect. Also, self-healing coatings designed and triggered by actual condition are closer to the reality. Origin: Zi-You Ding, Lan-Yue Cui, Rong-Chang Zeng. Surface Technology, 2019,48(3):1-9. DOI： 10.16490/j.cnki.issn.1001-3660.2019.03.001
镁合金腐蚀研究进展(26)—镁合金表面层层组装DNA涂层耐蚀性能 脱氧核糖核酸 （deoxyribonucleic acid, DNA） 是 一种由核苷酸重复排列组成的长链聚合物。所谓核苷酸，是指一个核苷加上一个或多个磷酸基团；核苷则是指一个碱基加上一个糖类分子。DNA骨架是由磷酸与糖类基团交互排列而成的一种长链聚合物 。 本文首次利用DNA和 聚乙烯吡咯烷酮（ polyvinylpyrrolidone, PVP ） 在镁合金表面通过层层组装技术(layer-by-layer (LbL) assembly)构建聚电解质多层膜(PVP/DNA) n 。该涂层表现出良好的耐蚀性能和生物相容性。特别地，该涂层在浸泡模拟体液中还表现出良好的类生物矿化效果。矿化产物有助于镁合金用于骨植入材料。 究其原因，主要可以归因于三点：（1）DNA分子中的磷酸基 团可以作为钙磷产物形核生长的诱导剂；（2）DNA与 PVP 的静电吸引作用可以有效地将钙离子吸附于分子层间；（3）PVP可以络合钙离子形成配合物。基于以上三点构建的层层组装多层膜在骨植入材料领域有一定的应用前景。 该项成果“ In vitro corrosion resistance of a layer-by-layer assembled DNA coating on magnesium alloy （Share link）” In vitro corrosion resistance of a layer-by-layer assembled DNA coating on.pdf 发表在国际期刊 Applied Surface Science ( IF4.439 ) ( 457, 2018: 49–58） 。第一作者 为博士生崔蓝月，通讯作者为曾荣昌教授和李硕琦博士。 Fig. 1 The schematic construction of the (PVP/DNA) n /Mg via LbL assembly. Fig. 2 (a–h) SEM images of the (PVP/DNA) 20 /Mg soaked in SBF for 6, 12, 24, 48, 72, 96, 120 and 432 h; (i) EDS spectra and (j) corresponding Ca/P molar ratio of the (PVP/DNA) 20 /Mg immersed in SBF for 0 ( Fig. 2 dI), 6, 12, 24, 48, 72, 96, 120 and 432 h. Fig. 3 a) XPS overview spectra and the evolution of (b) P 2p , (c) C 1s , (d) N 1s and (e) O 1s signals of (PVP/DNA) n /Mg surfaces. Fig. 4 EIS and the fitted results for the (I) AZ31 substrate, (PVP/DNA) n /Mg, n = (II) 5, (III) 10, (IV) 20 and (V) 40: (a) Nyquist plots, (b) Bode plots of |Z| vs. frequency, (c) Bode plots of phase angle vs. frequency in SBF and (d) equivalent circuits. Fig. 5 EIS curves and the fitted results for the (PVP/DNA) 20 /Mg: (a) Nyquist plots, (b) Bode plots of |Z| vs. frequency, (c) Bode plots of phase angle vs. frequency in SBF and (d) R ct values vs. immersion time and corresponding equivalent circuits. Fig. 6 Schematic representation of the degradation mechanism of the (PVP/DNA) 20 coating: (a and b) Ca-P nucleation and growth, (c) electrochemical corrosion of the substrate.
镁合金腐蚀研究进展（22）—镁合金表面聚硅氧烷纳米银涂层耐蚀与抗菌性 镁合金因具有良好的生物相容性和可降解性，可作为短时生物植入体植入人体，避免二次手术将其移除所带来的痛苦和医疗费用。然而，限制镁合金应用的主要因素是其耐腐蚀性差。 目前比较有效的解决方法之一是利用聚硅氧烷在镁合金表面改性。这是因为硅氧烷可以在镁合金表面形成Si-O-Si键，形成物理屏障保护层，提高镁合金的耐蚀性。我们已在镁合金表面构建聚甲基三甲氧基硅烷/微弧氧化复合涂层以提高其耐蚀性（Corrosion Science,2017, http://dx.doi.org/10.1016/j.corsci.2017.01.025 ）。 然而，医用可降解镁合金聚硅氧烷涂层可能有发生细菌感染的风险，增加早期植入体的移植失败率。因此，有必要在该涂层中掺入有效的抗菌剂。纳米银（ silver nanoparticles ， AgNPs ）作为广谱抗菌剂，具有低毒性，可以用作镁合金抗菌剂。层层组装（ layer-by-layer ， LbL ）技术是目前制备纳米银/聚电解质含银涂层的有效的方法。 研究发现，镁合金表面聚硅氧烷修饰纳米银层层组装复合涂层具有很好的耐腐蚀性和抗菌性。特别是，该涂层具有自修复性能，并且能够延长银离子的释放时间。该项工作“ Corrosion resistance and antibacterial properties of polysiloxane modified layer-by-layer assembled self-healing coating on magnesium alloy ” 在线发表在 Journal of Colloid Interface Science ( IF 5.091 ) 。 Abstract Magnesium (Mg) alloys have shown great potential in biomedical materials due to their biocompatibility and biodegradability. However, rapid corrosion rate, which is an inevitable obstacle, hinders their clinical applications. Besides, it is necessary to endow Mg alloys with antibacterial properties, which are crucial for temporary implants. In this study, silver nanoparticles (AgNPs) and polymethyltrimethoxysilane (PMTMS) were introduced into AZ31 Mg alloys via layer-by-layer (LbL) assembly and siloxane self-condensation reaction. The characteristics of the composite films were investigated by SEM, UV-vis, FT-IR, and XRD measurements. Corrosion resistance of the samples was measured by electrochemical and hydrogen evolution tests. Antibacterial activities of the films against Staphylococcus aureus were evaluated by plate-counting method. The results demonstrated that the composite film with smooth and uniform morphologies could enhance the corrosion resistance of Mg alloys owing to the physical barrier and the self-healing functionality of polysiloxane. Moreover, the composite coating possessed antibacterial properties and could prolong the release of assembled silver ions. Keywords Layer-by-layer; Corrosion resistance; Antibacterial property; Self-healing; Magnesium alloy; Silver nanoparticles. Graphical Abstract The PMTMS/(AgNPs/PEI) 5 film developed on the surface of Mg alloy could enhance the corrosion resistance and antibacterial properties, while it possessed self-healing performance and prolonged the release of Ag + ions. 链接： 曾荣昌发表论文目录 （Rong-Chang Zeng's Publications）(2000-)
镁合金腐蚀研究进展(21)—Mg-4Li-1Ca表面微弧氧化膜/壳聚糖自降解机理 调控医用镁合金腐蚀速率和微环境pH值面临巨大挑战。这是因为镁过快的降解速率与骨生长速率不相匹配。另外，腐蚀降解导致微环境的高碱性也不利于细胞生长。前人的工作和我们的工作表明，镁合金表面聚乳酸膜（PLLA）和壳聚糖（CS）能一定程度地提高镁合金的耐蚀性能和生物相容性。微弧阳极氧化膜（MAO）具有较高的硬度、与基体冶金结合和较好的耐蚀性。其多孔性也存在不足，长期浸泡后期可能反而加快基体腐蚀。但其多孔性也为高分子涂层提供更好的机械结合位点，有利于高分子涂层的结合。 我们的前期研究表明，Mg-Li-Ca表面经冷冻干燥得到的多孔MAO/PLLA膜在Hank's溶液中浸泡140h后，pH值范围为7.3-7.8.这说明PLLA的水解和酸化可中和调节镁腐蚀降解的pH值到适宜细胞生长的微环境。但PLLA的膨胀腐蚀和剥落也带来了临床应用的风险。相比PLLA，CS降解速率慢，另具有抗菌功能。因此，CS改性开始受到关注。我们课题组利用层层组装（layer-by-layer assembly）CS/聚谷氨酸(poly-L-glutamic acid)，实现了提高镁合金耐蚀性和抗菌性能的目的。郑玉峰教授课题组及其他研究者发现CS的分子量和层数对镁基体耐蚀有影响，证实CS可降低溶液pH值。但未见有镁合金表面CS膜极性和降解机理的报道。 本项工作发现，相对于镁合金基体，CS的自腐蚀电位更负，为阴极性。为此，我们提出了Mg-4Li-1Ca表面微弧氧化膜/壳聚糖自降解模型，并阐明其机理。 此项研究发表在 Surface and Coating Technology (2018, 34: 1-11 )。 题目为 ： Self-degradation of micro-arc oxidation/chitosan composite coating on Mg-4Li-1Ca alloy （ 可免费下载 ） 。 图 1 （a）MAO（b）MAO/CS-1,（C）MAO/CS-2,（d）MAO/CS-3 图2 极化曲线 图3 电位-时间曲线 图4 电化学阻抗 Abstract Regulating degradation rate and moderate pH micro-environment for biodegradable magnesium alloys face huge challenge. The chemical and morphological characteristics of micro-arc oxidation (MAO) and chitosan (CS) composite coatings, fabricated on Mg-4Li-1Ca alloy, are analyzed through field-emission scanning electronic microcopy, energy dispersive X-ray spectroscopy, X-ray diffraction and Fourier transform infrared spectroscopy. Corrosion resistance of the samples is evaluated via hydrogen evolution, potentiodynamic polarization and electrochemical impedance spectroscopy in Hank's solution. Results indicated that the MAO and CS coating enhances the corrosion resistance and antibacterial growth activity. With increasing immersion time, the degradation of the MAO/CS coatings gives rise to a decrease in pH value and leads to a rapid increase in hydrogen evolution rate after an immersion in Hank's solution after 100 h. The MAO/CS coatings retain the solution pH at a moderate level (≤8.25). A novel self-degradation mechanism of the MAO/CS coating on Mg-Li-Ca alloy is proposed due to the fact that MAO/CS coating is cathodic relative to the substrate. 链接： 曾荣昌发表论文目录 （Rong-Chang Zeng's Publications）(2000-)
镁合金表面旋涂层层组装涂层耐蚀性能 层层自组装（layer-by-layer self-assembly ，LBL）是上世纪90年代发展起来的一种操作简单、实现多功能的表面修饰方法。LBL主要利用静电、氢键等作用，即：带电基板在带相反电荷的聚电解质溶液中交替沉积制备聚电解质自组装多层膜（polyelectrolyte self-assembled mulilayers ）。 多层薄膜在催化、光学、能源、薄膜、生物医学等领域有广泛的应用，从而引起了高度关注。当前采用层层自组装获得多层薄膜的技术路线包括：浸涂、旋涂、喷涂、电磁沉积和流体组装。选择合适的组装技术可达到裁剪涂层物理化学性质的目的 。 浸涂法（Dip-coating, DC ）层层组装是镁合金表面制备层层组装涂层的常用方法。然而，当镁合金被完全地浸没于电解质溶液之中，样品会出现不同程度的腐蚀（浸泡时间、取样速度、pH、表面均匀性等的因素的影响），所制备涂层的耐腐蚀性有限。为解决此问题，旋涂法（Spin-casting, SC ）或许是不错的选择。 其原理为：在旋涂的过程中，由于样品的高速旋转，在镁合金表面会产生空气剪切力和离心力，在这两种力的作用下，滴在样品表面上的聚电解质中的水分子会被快速甩掉，进而得到均匀而且致密的涂层。 Highlights 1. Adefect-free, dense and uniform coating was prepared by the spin-casting technique. 2. The spin-casting filmhad stronger hydrogen bonds than the dip-coating film. 3. Spin-castingsample possessed excellent corrosion resistance and adhesion strength. 4. Spin-casting method could well promote the formation of hydroxyapatite inHBSS. 亮点 1. 旋涂法制备了一种无缺陷、均匀且致密的涂层； 2. 旋涂法制备的涂层，其不同的电解质之间形成了更强的氢键； 3. 旋涂法制备的涂层，具有更显著的耐腐蚀性和更强的结合力； 4. 旋涂法制备的涂层，在 HBSS 溶液中可以促进羟基磷灰石的形成。 该项工作发表在 Applied Surface Science, 2018, 434: 787–795 . （ 可免费下载 ） Fig. 1. Schematic diagram ofthe internal structure of the (PVP/PAA) 10 films prepared by (a) D-C methodand (b) S-C method. Fig.2. SEM morphology of (a, d)the D-C film , (b, e) the S-C filmand(c) the AZ3 1 substrate , (f) the elementalcomposition from point 1 to point 12 . Fig. 3. FT-IR spectra of(a) pure PVP, (b) pure PAA, (c) the D-C film and (d) the S-C film. Fig.4. Scratch results of (a) the D-C film and (b) the S-C film. Fig. 5. Schematicillustration of the corrosion mechanism of the (PVP/PAA) 10 films onAZ31 Mg alloys in HBSS. 相关文献 Joseph J. Richardson, Mattias Björnmalm, Frank Caruso. Technology-driven layer-by-layer assembly of nanofilms. Science , 2015, 348(6233), aaa2491. L.Y. Cui, S.D. Gao, P.P.Li, R.C. Zeng, F. Zhang, S.Q. Li, E.H. Han, Corrosion resistance of aself-healing micro-arc oxidation/polymethyltrimethoxysilane composite coatingon magnesium alloy AZ31, Corros. Sci. 118 (2017) 84–95. L. Cui, R.C. Zeng, S. Li,F. Zhang, E.H. Han, Corrosion resistance of layer-by-layer assembledpolyvinylpyrrolidone/polyacrylic acid and amorphous silica films on AZ31magnesium alloys, RSC Adv . 6(2016) 63107-63116. Lan-Yue Cui, Peng-Hua Qin,Xiao-Li Huang, Zheng-Zheng Yin, Rong-Chang Zeng*,Shuo-Qi Li*,En-Hou Han, Zhen-Lin Wang. Electrodepositionof TiO 2 layer-by-layer assembled composite coating and silane treatment on Mg alloy for corrosion resistance. Surface Coatings Technology . 324 (2017) 560–568. Lan-Yue Cui, Rong-Chang Zeng * , Xiao-Xiao Zhu, Ting-Ting Pang, Shuo-Qi Li*, Fen Zhang. Corrosion resistance of biodegradable polymeric layer-by-layer coatings on magnesium alloy AZ31 . Frontiers of Materials Science , 2016, 10(2): 134–146. Lan-Yue Cui, Ji Xu, Na Lu,Rong-Chang Zeng*, Yu-hong Zou, Shuo-Qi Li*, Fen Zhang. In vitro corrosion resistance andantibacterial properties of layer-by-layer assembled chitosan/ poly-L-Glutamicacid coating on AZ31 magnesium alloys. Transactions of Nonferrous Metals Society of China , 27(2017)1081−1086. Rongchang ZENG, Lijun LIU, KaijieLUO, Li SHEN, Fen ZHANG, Shuoqi LI, Yuhong ZOU. In vitro corrosion and antibacterial properties of layer-by-layer assembled GS/PSS coating on AZ31 magnesium alloys. Transactions of Nonferrous Metals Society of China , 25(2015)4028−4039.
标签: 涂层
