金银丝保护层涂料中交联助剂的合成及性能研究

本合成了一种交联助剂,将该交联助剂以不同用量分别加到原金银丝保护层涂料中得到了新的涂料,然后涂布于PET镀铝膜,并在170℃烘烤30s后切丝制得金银丝样品。检测样品的各项指标(耐酸碱蒸煮、耐晒、耐有机溶剂、耐磨擦和柔韧性),确定了交联助剂在金银丝保护层涂料中的作用及其用量的关系。     

金银丝保护层涂料中环氧交联助剂作用的研究

为改善金银丝保护层涂料的工艺,在涂料中添加了1种环氧交联助剂。通过正交试验对比了原涂料和现涂料的各项性能指标(耐酸碱蒸煮、耐有机溶剂、耐磨擦和有无柔韧性等)。采用电子扫描仪观察了涂层的表面结构。最后得出添加环氧交联助剂涂料的各项性能要好于前者而且使涂布工艺由原来的180℃×30 s降低到160℃×20 s。     

涂层厚度对水性彩色反射涂料反射率影响的研究

以水为分散介质,用铁铬黑及红外反射颜料为主要颜料,以纯丙乳液为成膜物质,制成水性彩色太阳热反射涂料,有较高的反射率。颜料和成膜物质是影响涂层反射率的主要因素,除此之外,涂层厚度也对反射率产生影响。研究了水性彩色涂料反射率与涂层厚度和对比率的关系。结果表明,涂层反射率随涂层厚度和对比率的提高而增强。相同颜色涂料,当涂层透过率接近零时,涂层厚度对反射率影响随之减弱,涂层反射性能只与其表面反射率相关。     

涂料磨损对涂层织物性能的影响

涂层作为一种织物用面料的后整理方式,近年来不断推陈出新,在当今国际市场上新产品层出不穷,涂层不仅能改善织物用面料的外观和风格,还能根据涂层的不同性能使织物具有防水、透气透湿及抗静电、抗紫外线等多种功能。本研究测试分析涂料的磨损对涂层面料性能的影响,对比了PU涂层、PU涂白织物的各项性能及不同摩擦次数后面料性能的变化。     

基于灰色关联度分析涂层厚度对其保护性能的影响

在2024铝合金表面涂装不同厚度(35μm、75μm、130μm、245μm)的H900环氧涂层,将环氧涂层/铝合金试样浸泡于质量分数3.5%的氯化钠溶液中,定期进行电化学交流阻抗测试,对阻抗数据进行解析,分析涂层的劣化过程,研究涂层厚度的增加对涂层保护性能的影响。实验结果表明,在相同的时间内,涂层厚度越大,涂层电阻R_c越高,孔隙率P越低,说明涂层厚度增加,对金属基体的保护性能更好。使用灰色关联度法分析,浸泡80 d时的低频阻抗值|Z|_{0.01 Hz}和涂层电阻R_c与涂层厚度D的相关性最高,并得到|Z|_{0.01 Hz}和Rc随D变化的表达式,且二者表达式形式一致。     

钢结构防火涂料涂层厚度与耐火时间关系的探讨

本文就工程施工中,对由耐火实验检测的钢结构防火涂料耐火时间与厚度,计算出不同耐火等级和钢结构种类所需的涂层厚度的计算方法及其理论性进行了探讨。     

涂料原料和涂层厚度对反射隔热保温性能影响研究

通过研究涂料配方中所用乳液、颜料、常规填料和隔热填料在红外灯下的反射、隔热和保温性能,发现高折射率的二氧化钛和含有微孔的硅藻土具有最佳的反射和隔热保温效果,轻质碳酸钙和重质碳酸钙具有一定的隔热保温作用,而理论上具有隔热保温效果的填料海泡石等并没有预期的效果。涂层厚度对隔热保温效果具有一定影响,但是没有颜料和填料的影响大。隔热涂料使用的填料应含有硅藻土、二氧化钛以及一些常规的填料。     

PyC涂层厚度对T1000炭纤维拉伸性能的影响

本研究利用不同CVD时长制备了两种不同PyC涂层厚度的涂层炭纤维。研究了PyC涂层厚度对涂层炭纤维形貌、结构成分、精细结构以及拉伸性能的影响。研究表明:随着PyC涂层厚度增加,涂层炭纤维表面粗糙程度增加,炭材料的无定形含量减少,C有序度提高,石墨化度增加。与未涂层炭纤维相比,PyC涂层炭纤维丝束拉伸强度下降,厚度为1.99μm的PyC涂层炭纤维强度保有率为76.0%。     

彩涂卷钢涂层厚度对耐老化性能的影响

分析了目前国内外彩涂卷钢市场需求的现状,通过紫外人工加速老化试验,从涂层表面光泽保持率、色差以及表面粉化、开裂的角度,着重研究了彩板的不同面漆涂层厚度对彩板耐老化等相关性能的影响.用减薄涂层来降低彩板生产成本的方法,必然带来严重的质昔问题.     

油剂对有光缝纫线型涤纶短纤维可纺性的影响

就不同油剂对有光缝纫线型涤纶短纤维可纺性的影响进行了研究。结果表明不同油剂对纤维的可纺性乃至成纱质量影响较大 ,通过对油剂的改进可以改善纤维的可纺性 ,从而减少断头、缠皮辊、绕罗拉等现象     

X-射线荧光光谱法测定废塑料表面金属涂层含量

本文提出了利用X-荧光仪测定废塑料各种金属涂层中金属元素含量的方法。以稳定性为优化原则选择了仪器针对不同元素的测量条件,研究了实验过程中样品杯、基材以及金属涂层中元素效应对检测结果的影响;方法精密度为0.008%~0.044%之间;将X-荧光检测结果与ICP检测结果进行比对并得出同样的数据,该方法为控制废塑料金属涂层产生的危害和污染提供更为合理的检测手段,并已应用到实际检测当中。     

鞣酸改性紫外光固化金属罩光涂料的研制

采用一种有机环保型缓蚀剂鞣酸来改性UV固化涂料,介绍了其基本组成及配制过程.讨论了鞣酸用量、改性方法(冷拼、预聚)对涂料性能的影响.利用电化学阻抗谱研究了2种不同改性方法所得涂层的防腐性能.结果表明,该涂料可用于金属表面涂覆.当m(EA):m(PUA)=7:3,m(PO3-TMPTA):m(TPGDA):m(HDDA):m(PO2-NPGDA):m(HEMA):m(助剂):m(引发剂)=6:10:13:18:8:3:6,m(低聚物):m(活性稀释剂)=6:5,鞣酸用量在2.0%左右时,采用预聚方法获得的涂层其综合性能优良,防腐效果最好.     

影响有机硅热防护涂层的热导率的因素

以硅树脂为基料,配合中空玻璃微球等填料,制备了有机硅热防护涂层;研究了填料的组合、添加量、规格以及溶剂体系等对有机硅热防护涂层热导率的影响。结果表明,采用表面经过处理的中空玻璃微球和气相法白炭黑A380的组合填料、中空玻璃微球的用量选择60份、并使用酮类溶剂和芳香类溶剂的混合溶剂制成的热防护涂层,其热导率≤0·1W/(m·K),密度≤0·55g/cm3,拉伸强度≥2·0MPa。     

Rheology and roll coating dynamics of metallic basecoats for automotive pre-coated metal sheet

Rheological behavior and coating dynamics of solvent-based metallic basecoats using 3-roll coaters were investigated for the application process based on pre-coated metal (PCM) sheet technology that can promisingly diminish the environmental pollutants in automotive OEM line. Rheological properties of the metallic basecoats related to optical appearance and color variations were measured by altering the content of aluminum (Al) flake and temperature of the coating solution. The results showed that the basecoats exhibited a very weak shear-thinning behavior regardless of Al flake contents in this study. However, their elastic behaviors were intensified with increasing the Al flake content. From the 3-roll coating experiments with forward and reverse coating modes, the operability windows in the coating process, demarcating the uniform coating flow from defects, were established. In particular, it was possible to elucidate the relationship between the capillary number and speed ratio conditions for the desired coating thickness in roll coating systems accompanied with reverse coating mode between the pick-up and metering rolls. It was verified from the cross-sectional images of coating layers that most of Al flakes inside the basecoat layer were oriented parallel to the coating surface under the continuous roll coating flows.     

Influence of cover thickness on the ballistic performance of silicon carbide subjected to large-scale tungsten projectiles

Al alloy was the optimal metal cover material for confined silicon carbide (SiC) against blunt tungsten-heavy-alloy projectiles based on a previous research. In this study, the influence of the aluminium (Al) alloy plate thickness on the ballistic performance of SiC was investigated to determine the optimal plate thickness. In addition, the ballistic responses of covered ceramic composite structures under various impact velocities were examined. The failure features of the cover plates and ceramic were elaborated based on tests and simulation analyses. The penetration weight calculated using the measured residual penetration was applied to characterise the ballistic performance of ceramic armour modules. The results showed that thin and thick cover plates could increase the loading rate of the ceramic pressure, thus attenuating their buffering effects on the ceramic. Therefore, the determination of the optimal cover plate thickness must simultaneously meet the requirements of stiffness and the reduced ceramic pressure loading rate. The optimal thickness for the Al alloy cover plate was 4 mm for lateral and back confined ceramic against blunt projectiles in this paper, which was obtained via a numerical simulation. Finally, the buffering effect of the cover plate on enhancing the structural ballistic performance varied with the impact velocities of the projectiles. This study provides insights for covered ceramic armour applications.     

Development and characterisation of a Y2Ti2O7-based glass-ceramic as a potential oxidation protective coating for titanium suboxide (TiOx)

A silica-based glass-ceramic, with Y₂Ti₂O₇ as the major crystalline phase, is designed, characterised and tested as an oxidation-protective coating for a titanium suboxide (TiO_x) thermoelectric material at temperatures of up to 600 °C. The optimised sinter-crystallisation treatment temperatures are found to be 1300 °C and 855 °C for a duration of 30 min, and this treatment leads to a glass-ceramic with cubic Y₂Ti₂O₇ and CaAl₂Si₂O₈ as crystalline phases. An increase of ~270 °C in the dilatometric softening temperature is observed after devitrification of the parent glass, thus further extending its working temperature range.Excellent adhesion of the glass-ceramic coating to the thermoelectric material is maintained after exposure to a temperature of 600 °C for 120 h under oxidising conditions, thus confirming the effectiveness of the T1 glass-ceramic in protecting the TiO_x material.     

Characterization of the permeability of a high performance composite coating to cathodic protection and its implications on pipeline integrity

In this work, the permeability of a high performance composite coating (HPCC) and its component layers, fusion bonded epoxy (FBE) and medium-density polyethylene (MDPE), to cathodic protection (CP) was investigated by various electrochemical measurements. Results demonstrate that the permeability of the coatings to water is ranked as FBE > MDPE > HPCC. Compared to FBE, MDPE, as a highly non-polar coating, plays a key role in protecting the HPCC from the water permeation. HPCC is impermeable to CP, and shows a pure capacitive behavior, with ultra-high low-frequency impedance at the order of 10¹⁰ Ω cm² during the test period. Both FBE and MDPE coatings are permeable to CP, which will make up the degradation of the coatings due to the water-uptaking. Therefore, under an appropriate CP application, the two coatings are capable of maintaining the pipeline integrity. HPCC provides an excellent alternative to maintain the pipeline integrity in the soil environment.     

海洋操作平台钢结构用防护涂料的制备与性能

以聚己内酯、新戊二醇与顺丁烯二酸酐合成了聚酯树脂,然后与六亚甲基二异氰酸酯(HDI)反应以提高支化度,引入有机硅后再同丙烯酸单体反应制得丙烯酸改性聚酯树脂.以此丙烯酸改性聚酯树脂和适量的颜填料为甲组分、拜耳3390固化剂为乙组分,开发了适用于海洋气候的钢结构表面防护涂层.研究了顺丁烯二酸酐含量、丙烯酸改性聚酯树脂羟基含量、n(—NCO)∶n(—OH)值和聚合条件对面漆性能的影响.当顺丁烯二酸酐的用量为聚酯树脂的5％,自制的丙烯酸改性聚酯树脂羟基含量为4.5％±0.3％,n(—NCO)∶n(—OH)=1.1～1.4时,所制备的丙烯酸改性聚酯树脂面漆配以环氧富锌底漆及环氧云母氧化铁中涂漆得到的涂层体系能够满足海上平台钢结构的防护要求.