石墨烯在环氧富锌底漆中的应用

用石墨烯替代环氧富锌底漆中的部分锌粉,制备了一种锌烯复合涂料。采用盐雾、耐冲击、附着力以及电化学等测试方法对不同石墨烯含量的锌烯复合涂料和环氧富锌底漆的性能进行了评价,并对锌烯复合涂料的防腐机理进行了分析。结果表明:石墨烯添加量为1%时,锌烯复合涂层具有最佳的防腐性能。     

石墨烯水性环氧低锌防腐涂料的制备及电化学研究

选取溶液剥离法制备的石墨烯（ PG）对水性环氧富锌涂料进行改性，取代富锌涂料中的部分锌粉，制备低锌含量的石墨烯水性环氧含锌涂料。研究了石墨烯掺量对涂层附着力、柔韧性、耐冲击性、耐中性盐雾、耐连续冷凝等性能的影响，及其电化学行为。结果表明：石墨烯可以明显改善涂层的力学性能及防腐性能，掺量 0. 3%时涂层综合性能最佳，柔韧性为 1 mm，耐冲击性为 50 cm，划圈附着力为 1级，耐中性盐雾、耐连续冷凝经 1 500 h未出现明显的扩蚀、起泡、脱落及开裂等现象，与中间漆、面漆具有优异的匹配性。     

石墨烯与氧化石墨烯增强富锌环氧涂层防腐性能的研究

研究了三种不同锌粉含量的富锌环氧底漆的腐性能,包括厚度、硬度、附着力等物理测试,比较了这三种不同锌粉含量的耐盐雾性能的差异。从而在这三种不同锌粉含量的环氧漆中选择出一种,用以进行后续的实验研究。其次,我们研究了氧化石墨烯(GO)增强富锌环氧涂层的防腐性能,包括物理性能的测试、电化学性能的测试和耐中性盐雾测试。最后,我们研究了石墨烯(G)增强富锌环氧涂层的防腐性能,同样对添加石墨烯的复合涂层进行了物理测试、电化学测试和耐中性盐雾测试。并对氧化石墨烯/富锌环氧复合涂层(GO/Zn)和石墨烯/富锌环氧复合涂层(G/Zn)的防腐性能进行了对比。发现,添加石墨烯的复合涂层(G/Zn)性能比添加氧化石墨烯的复合涂层(GO/Zn)好,且在石墨烯含量为1%时防腐性能最好。     

石墨烯-锌粉水性环氧复合涂料的制备与研究

通过填料与石墨烯(graphene,GR)浆料预混合的工艺制备石墨烯复合粉体,采用石墨烯复合粉体替代传统环氧富锌涂料中的部分锌粉,最终制备了一种GR-锌粉水性环氧复合涂料。利用原子力显微镜(Atomic Force Microscope,AFM)及扫描电镜(Scanning Electron Microscope,SEM)分析其在混合粉料中的分散性;利用耐盐雾实验考察涂料的防腐性能,结果表明:添加GR能有效提高水性环氧锌粉复合涂层的耐腐蚀性能,并且石墨烯浓度为0.25%的复合粉体掺量下的环氧锌粉复合涂料表现出最佳的腐蚀防护性能;同时由于GR的加入,涂层耐冲击性、弯曲性和附着力都得到增强。并通过电化学实验得到涂料的腐蚀电流密度(Icorr)和腐蚀电压(Ecorr)表征涂料的防腐机理,结果表明0.25%石墨烯复合粉体制备的涂料具有最小的腐蚀速率。     

多巴胺改性氧化石墨烯-TiO_2纳米复合材料在水性环树脂中物理性能和腐蚀动力学研究

利用多巴胺(DA)改性氧化石墨烯(GO),并将纳米TiO_2负载在氧化石墨烯GO表面,制备了纳米PDA@GO-TiO_2复合材料。通过FT-IR、XRD、Raman光谱、XPS和TEM等表征手段对纳米PDA@GO-TiO_2复合材料的结构、微观形貌等进行表征分析。采用超声分散与机械搅拌相结合的方法将改性纳米PDA@GO-TiO_2复合材料分散到水性环氧树脂中,制备了纳米PDA@GO-TiO_2复合水性环氧树脂涂层(PGT/WEP)。测试了PGT/WEP涂层的硬度、耐冲击性、附着力等物理性能,并对其电化学性能进行了评价。结果表明:在水性环氧树脂中添加纳米PDA@GO-TiO_2复合材料比在相同百分比下使用GO或纳米TiO_2的涂层具有更好的物理性能。涂层性能和腐蚀动力学分析表明,PDA改性GO-TiO_2作为水性环氧涂料的添加剂具有潜在的应用前景。     

UV固化环氧丙烯酸酯-纳米Al2O3颗粒复合涂层的性能

制备了UV固化环氧丙烯酸酯-纳米Al2O3复合涂料. 对纳米复合涂层的硬度、附着力、耐腐蚀性及热稳定性等性能进行了表征,并考察了纳米Al2O3对涂层性能的影响规律. 结果表明,涂层硬度及附着力先随纳米Al2O3添加量增加而提高,添加量为2%时,涂层附着力达1级;添加量为3%时,涂层铅笔硬度达6H;添加量继续增大,涂层硬度及附着力均下降. 对纳米复合涂层的热重分析和电化学阻抗谱分析结果表明,加入纳米Al2O3能提高涂层的热稳定性,但加入未改性纳米Al2O3使涂层的耐腐蚀性下降.     

石墨烯对环氧树脂交通标线涂料性能的影响

选用双酚A型环氧树脂为主要成膜物质制备疏水耐磨型交通标线涂料，探讨了不同类型的石墨烯或氧化石墨烯掺量(质量分数0.05%、0.10%、0.15%、0.20%、0.25%或0.30%)对涂层疏水性、耐磨性、耐蚀性等性能的影响。结果表明，添加少层或多层的石墨烯或氧化石墨烯对涂层的硬度、耐水性和耐盐水性的影响不大，但能不同程度地提高涂层的附着力、柔韧性、耐冲击性、疏水性、耐磨性、耐酸性和耐碱性。当少层氧化石墨烯质量分数为0.10%时，涂层的综合性能最好，水接触角达到131.977°，吸水率为1.11%，铅笔硬度为6H，柔韧性为1 mm，附着力为0级，耐1 kg冲击的高度达到50 cm。     

还原氧化石墨烯对水性无机富锌涂料防腐性能的影响

为提高水性无机富锌涂层的防腐性能，以高模数硅酸钾溶液和氟碳乳液为成膜物质，片状锌粉为主要功能填料，并添加适量还原氧化石墨烯分散液作为辅助填料，制备了硅酸盐水性无机富锌涂料。采用物理性能测试、电化学测试、盐雾试验等测试方法，探究了还原氧化石墨烯添加量对涂层防腐性能的影响。结果表明：加入适量还原氧化石墨烯，可以增强水性无机富锌涂料的防腐性能，当涂料中还原氧化石墨烯分散液添加量达到6%时，涂层的力学性能及耐腐蚀性最佳，经过腐蚀后的主要腐蚀产物为Zn₅(OH)₈Cl₂和ZnO。     

石墨烯的氧化程度和含量对水性锌粉涂料防腐性能的影响

制备了 3种不同氧化程度的氧化石墨烯,利用氧化石墨烯对水性环氧富锌涂料进行改性。采用盐雾试验、电化学测试、耐冲击性及附着力测试等对改性涂层的性能进行研究,研究发现氧化程度较低的氧化石墨烯改性环氧富锌涂料性能最佳。然后探究了氧化石墨烯含量和锌粉含量对该涂层的耐腐蚀性和力学性能的影响。结果表明：氧化石墨烯（ GO）的添加可以有效延缓钢材的腐蚀,当 GO-1添加量为 0.36%（质量分数,下同）,锌粉含量为 44%时,制备所得的 GO-1/水性环氧富锌涂料的综合性能最佳。当制得的氧化石墨烯的氧化程度较小,含氧基团较少且没有出现羧基时,涂料的耐腐蚀性能得到改进。     

SBA-15改性石墨烯环氧复合涂层制备及其防腐性能

用γ-氨丙基三乙氧基硅烷（KH-550）将SBA-15分子筛接枝到石墨烯上制备功能填料，并将其填充到水性环氧树脂中制备复合涂层。采用红外光谱（FTIR）、氮气吸附脱附和透射电镜（TEM）对填料进行表征；采用电化学阻抗谱（EIS）、盐雾试验和附着力测试等方法对不同填料添加量涂层的防腐性能及力学性能进行表征。实验结果表明，当功能填料添加质量为1.0%时，涂层具有最佳的电化学性能、耐盐雾性能、以及附着力性能。复合涂层的防腐性能明显优于纯环氧涂层，因为功能填料的孔/片协同结构有效的延缓了腐蚀粒子到达金属基材表面的时间。     

单官能单体在紫外光固化塑料罩光涂料中的应用

讨论并分析了不同单官能单体在光固化涂料应用中对涂膜的固化速率、硬度、对底材的附着力、以及抗蚀性等各项指标的影响。     

Preparation and anticorrosive behavior of epoxy-polysiloxane hybrid coatings modified by polyetheramines

Inorganic/organic hybrid coatings based on epoxy-polysiloxane resin were prepared by using five types of curing agents, including 3-aminopropyltriethoxysilane (APTES) alone (control coating) and the mixtures of four types of polyetheramines (Jeffamine D230, D400, T403, and THF100) along with APTES (modified coatings). The mechanical, adhesion, and corrosion resistance properties of the hybrid coatings cured by different curing agents were studied. The dynamic mechanical thermal analysis results showed that the glass transition temperature and cross-link density of the modified coatings decreased with increasing of the chain length of polyetheramines. The impact resistance height of the modified hybrid coatings was more than one time higher than that of the control coating. The adhesion of the modified hybrid coatings was enhanced compared to the control coating except the coating modified by THF100. Compared with the control coating, comparable hardness and improved wet adhesion were attained for the coatings modified by polyetheramines D230 and T403 with shorter chain length, while the hardness and wet adhesion were decreased for the coatings modified by polyetheramines D400 and THF100 with longer chain length. The corrosion resistance behavior of the hybrid coatings was thoroughly examined by electrochemical impedance spectroscopy and salt spray tests. It was found that the corrosion resistance behavior of the hybrid coatings increased with D230 and T403 due to higher cross-link density and decreased with D400 and THF100 due to lower cross-link density.     

Thermomechanical and corrosion inhibition properties of graphene/epoxy ester–siloxane–urea hybrid polymer nanocomposites

The effect of graphene on the corrosion inhibition properties of a hybrid epoxy–ester–siloxane–urea polymer was investigated. The weight fraction of graphene was varied from 1 to 2 wt%. Direct current polarization (DCP) and electrochemical impedance spectroscopic (EIS) techniques were used to measure the polarization and coating resistance of the coated aluminum alloy substrate. The grapheme/hybrid polymer composite coatings showed much higher corrosion inhibition property when compared to the neat hybrid polymer coating. An increase in glass transition temperature and rubbery region modulus was also observed for composites containing 1–2 wt.% of graphene. A direct correlation between the rubbery plateau modulus of free standing composite thin films and corrosion resistance of the composite coatings was made, indicating that the corrosion protection mechanism is due to restriction of the polymer chain motion by graphene which causes a decrease in coating permeability.     

Mixed metal oxide inorganic/organic coatings

Mixed metal oxide ceramer coatings were developed using linseed oil as the organic phase with titanium i-propoxide, and zirconium n-propoxide as the inorganic sol-gel precursors. The overall goal of this study was to develop a primer that will provide corrosion protection and better adhesion to metal substrates with minimal environmental impact. Zinc acetate dihydrate was introduced to the system as an anticorrosive agent. Various coatings properties such as adhesion, hardness, impact resistance, flexibility, and tensile properties were investigated as a function of sol-gel precursor type and content. In addition, electrochemical impedance spectroscopy (EIS) was used to evaluate the corrosion properties of these mixed metal oxide inorganic/organic coatings. Department of Polymers and Coatings, Fargo, ND 58105.     

UV固化丙烯海松酸聚氨酯丙烯酸酯的合成及应用

以2,4-甲苯二异氰酸酯(TDI)、丙烯海松酸二甘醇聚酯二元醇和丙烯酸羟丙酯(HPA)为主要原料合成了可紫外光固化的涂料用丙烯海松酸聚氨酯丙烯酸酯(APAPUA)低聚物。对产物进行了红外表征,并考察了其光固化行为。测试了APAPUA固化膜的硬度、柔韧性及其他力学性能,同时考察了其热稳定性。结果表明,该低聚物固化膜铅笔硬度达到4H,附着力1级,耐冲击性55 cm,初始分解温度245℃,具有固化速度快,力学性能及耐热性优良等特点,可以作为价格低廉的耐热性低聚物应用于光固化涂料。     

Preparation and tribocorrosion performance of CrCN coatings in artificial seawater on different substrates with different bias voltages

The CrCN coatings have been prepared by multi-arc ion plating technology with different bias voltages on 316?L, TC4 and H65 substrates, respectively. The prepared CrCN coatings have been characterized by XRD, SEM, and EDS, respectively. The mechanical properties, electrochemical corrosion behavior, and tribological performance of prepared coatings were tested by microhardness tester, scratch tester, electrochemical workstation, and friction and wear tester, respectively. Results show that the CrCN coatings with bias voltage of ?50?V presented the finer grain size, denser structure, better comprehensive mechanical properties and friction, and better corrosion resistance than the CrCN coatings with a bias voltage of ?30?V. The coating on TC4 substrate show the lower hardness, the better adhesion, the better electrochemical properties and tribological properties than that on 316?L substrate. The coatings based on H65 Cu substrate presented the worst electrochemical and wear properties. The CrCN coating with a bias voltage of ?50?V on TC4 substrate is an optimal candidate in artificial seawater for tribocorrosion.     

Synthesis and properties of UV-curable waterborne urethane modified acrylic coatings with varying vinyl content

It has been an effective method to improve the metal protective performance of UV-curable waterborne coatings by increasing the crosslinking degree. Hence, a series of UV-curable waterborne urethane modified acrylic (UV-WUA) coatings with different vinyl content were prepared. Firstly, a functional prepolymer containing carboxyl and hydroxyl groups was synthesized by free radical copolymerization (FRCP) using acrylic acid (AA), 2-hydroxyethyl acrylate (HEA), methyl methacrylate (MMA) and butyl acrylate (BA). Next, it was grafted with different amounts of semi-adduct of isophorone diisocyanate (IPDI) and HEA (IPDI-HEA), and finally neutralized and hydrated, obtaining UV-WUA dispersions which were then cured by UV to acquire cured films and coatings. Meanwhile, molecular structures, molecular weights, particle sizes, and Zeta potentials were characterized. Then, the heat resistance, mechanical performance, adhesion and the pencil hardness of the coatings were also investigated. Moreover, their protective performance was tested by electrochemical methods, and the surface morphology was analyzed by atomic force microscopy. The results showed that the coating had desirable comprehensive performance when vinyl content reached 0.86 mmol·g⁻¹.     

New UV-Curable Anticorrosion Coatings from Vegetable Oils

Bio-based epoxy resins are attracting widespread interest in the field of polymer thermosets as environmentally friendly building block. In the present study, the feasibility of applying UV-curable epoxidized vegetable oils (EVOs) as anti-corrosion coating is investigated. Rheological characterization of EVOs is carried out, and their viscosity-shear relationship is evaluated. The cationic UV-curing of EVOs successfully gives rise to crosslinked materials with a wide range of thermo-mechanical properties, evaluated by differential scanning calorimetric analysis and dynamic thermal mechanical analysis. A high epoxy-group conversion, ranging from 93% to 99%, is always obtained. The thermal stability and surface properties of the bio-based coatings, such as, pencil hardness, adhesion, solvent resistance, and contact angle, are analyzed. Moreover, the corrosion protection effectiveness of the coatings is characterized by potentiodynamic polarization and electrochemical impedance spectroscopy measurements. In addition, field emission scanning electron microscopy is used to assess the samples morphology after corrosion tests.     

不同颜色色浆对氟树脂/铝低红外发射率涂层的影响

研究了大红、深黄、水紫、黑色4种颜色色浆对氟树脂/铝低红外发射率涂层光泽、附着力、硬度、粗糙度、耐冲击性、色差、红外发射率、耐腐蚀性等性能的影响。研究结果显示:深黄色色浆涂层的发射率最低,约为0.1;不同色浆对氟树脂涂层色差明度影响不同,相对于其他色浆,水紫能够使涂层偏暗;大红、深黄、水紫色浆的涂层硬度均为6H;加深黄色浆的涂层附着力最好,其次是大红色浆和水紫色浆;深黄色浆对涂层的耐冲击性影响最大,其次是大红色浆和水紫色浆;相对于大红、深黄、黑色色浆,水紫色浆涂层具有最低的粗糙度,表面比较光滑;水紫色浆和深黄色浆的红外波峰比较持平,有利于减小表面发射率;水紫色浆氟树脂涂层的耐腐蚀性能最好。耐盐水腐蚀测试后4种涂层均没有明显失光,水紫涂层没有发生明显变色,深黄和黑色涂层起泡密度较低。水紫色浆因其粒径均匀细小,在氟树脂涂料中易分散,与氟树脂相容性好,因此具有相对较优的综合性能。     

耐磨紫外光固化水性木器涂料的研究

以水溶性聚氨酯丙烯酸酯为基础配制紫外光固化水性木器涂料,加入纳米氧化铝,考察了体系黏度、二氧化硅、偶联剂对纳米氧化铝分散稳定性的影响,测试了其附着力、硬度、光泽度、耐水性、耐醇性和耐磨性等性能。结果显示,该涂料具有良好的耐水性、耐醇性和耐磨性。