共查询到17条相似文献,搜索用时 625 毫秒
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水性可剥离防护涂料的制备和性能研究 总被引:1,自引:0,他引:1
以聚氨酯乳液tm803为成膜物质,以R960为填料,以BYK-151为润湿分散剂,以BYK-011、BYK-094为消泡剂,以BYK-333为流平剂,以BYK-425为增稠剂制备出一种新型水性可剥离防护涂料。性能测试表明,该涂料平均拉伸强度达5.72MPa,平均断裂伸长率达258.35%,具有很好的可剥离性。 相似文献
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可剥离防护涂料的研究进展 总被引:3,自引:0,他引:3
介绍了国内外可剥离涂料的常用成膜物质,包括聚氨酯树脂、聚苯乙烯树脂、聚乙烯醇、有机硅、聚丁基二烯、氯醋树脂、乙基纤维素、乙烯基高分子树脂、丙烯酸树脂及其共聚物等,讨论了以它们为成膜物质时所制备的可剥离涂料的优劣性,并对可剥离涂料存在的问题和发展方向进行了展望。 相似文献
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以环氧改性丙烯酸树脂为基料,氯化石蜡和Sb2O3,为阻燃改性剂,制得了阻燃型丙烯酸聚氨酯绝缘涂料。研究了不同丙烯酸树脂、氯化石蜡及协同剂Sb2O3用量对涂料电气性能、阻燃性能和漆膜硬度、光泽度的影响。结果表明,用环氧改性丙烯酸树脂制成的涂料具有较好的阻燃性能和电气绝缘性能。其体积电阻率为9.6×10^25Ω·m。电气强度达32MV/m。当氯化石蜡用量为8%,在3%的Sb2O3协同作用下,可将聚氨酯涂料的极限氧指数(LOI)从18提高到31,同时能保证聚氨酯涂料优良的物理机械性能。 相似文献
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为了制备隔热性能和透光性均较好的建筑物玻璃隔热涂料,以水性聚氨酯为成膜物质,纳米氧化锡锑(ATO)和纳米二氧化钛(TiO2)为填料,制备了水性纳米透明隔热玻璃涂料。采用扫描电镜、隔热膜温度测试仪及紫外分光光度计对纳米ATO与TiO2粒子在涂料涂膜中的分散稳定性、涂料涂膜的隔热性能及光学性能进行了分析,研究了纳米TiO2与ATO浆料配比及涂膜厚度对涂料涂膜性能的影响。结果表明:纳米ATO与TiO2浆料通过硅烷偶联剂KH-570改性,再辅以分散剂分散,经过高速分散和超声波分散后,与聚氨酯复合制得了分散稳定的复合透明涂料;该涂料不仅具有良好的成膜性能,且涂膜经红外灯照射60 s后,与空白玻璃对比,隔热温差最高达6.23℃,在保证良好的可见光透过率及隔热性能的前提下,最佳纳米TiO2与ATO浆料体积比为2∶20,最佳涂膜厚度为75μm,此时涂料涂膜隔热温差达3.60℃。 相似文献
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水性聚氨酯(PU)是一种环保绿色的涂层材料,广泛应用于皮革、纺织、建筑涂层等领域。作为皮革、纺织涂层时,聚氨酯的透湿性决定服装的穿着舒适性,而常规水性聚氨酯的透湿性较差,需要对其进行改性获得透湿性优异的涂层。本文采用CaCl2和十七氟癸基三甲氧基硅烷(FAS-17)对硅藻土进行改性,研究了改性条件对硅藻土结构和性能的影响,将调湿性能较好的改性硅藻土(FAS-17-CaCl2-D)与PU复合,研究复合膜的透湿性。结果表明:采用质量浓度为30wt%CaCl2和0.8wt%FAS-17改性的硅藻土综合性能最好,改性后硅藻土的比表面积、孔隙结构增大,调湿性能提高,FAS-17表面疏水修饰进一步强化了其调湿作用。将性能最好的FAS-17-CaCl2-D与PU复合后,FAS-17-CaCl2-D/PU透湿性随着FAS-17-CaCl2-D用量的增加先增大后减小,复合膜的疏水性提高。1%FAS-17-CaCl2-D与PU复合制备的复合膜透湿率最大,... 相似文献
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Giambattista Guidi Fabrizio Cumo Livio de Santoli 《Clean Technologies and Environmental Policy》2010,12(3):283-289
The application of strippable coatings is an innovative technology for decontamination of nuclear plants and for any decontamination project aiming at removing surface contamination. An adhesive plastic coating is applied on the contaminated surface. The strippable coating is allowed to cure for up to 24 h, after which it can be easily peeled. The coating traps the contaminants in the polymer matrix. Strippable coatings are non-toxic and do not contain volatile compounds or heavy metals. Since the coating constitutes a solid waste, disposal is easier than treating contaminated liquid wastes, produced by the baseline technology: steam vacuum cleaning, based upon superheated pressurized water in order to remove contaminants from floors and walls. A life cycle assessment (LCA) has been carried out with the purpose of comparing the strippable coating with the steam vacuum technology. The functional unit of the study is represented by a surface of 1 m2 to be decontaminated. The results of LCA achieved using Sima Pro 5.0® software confirm the good environmental performances of strippable coatings. Taking into account both LCA and environmental costs for liquid wastes, the advantages of strippable coatings will be more and more evident. 相似文献
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目的 制备一种新型环保、综合性能优异的高透明防雾涂层,解决生鲜食品的塑料包装薄膜极易发生雾化的问题。方法 通过溶液共混法将聚乙烯醇(Polyvinyl Alcohol,PVA)和海藻酸钠(Sodium Alginate,SA)混合制备PVA-SA防雾涂料,并利用刮涂法将其涂覆于PE薄膜表面,以制备防雾涂层。测试分析涂层的组成,以及对薄膜防雾性能的影响,并使用分子动力学模拟软件分析水分子在不同界面的运动行为,探究PVA-SA涂层的防雾机理。结果 经过测试分析发现,采用质量分数为2.78%的PVA和0.84%的SA制备的涂层展现出最佳的防雾效果,且该涂层具有超亲水性,其水接触角低至7.8°,所制备涂覆膜的平均透光率高达93.2%,平均雾度仅为3.44%,该涂覆膜在热雾中表现出高透明度,且对奶油草莓具有良好的保鲜效果。在模拟分析中发现,水滴与涂层间的平均结合能为水滴与薄膜的结合能的57倍。结论 PVA-SA涂层具有高透明性,在不影响薄膜原有透明性的同时有助于增强薄膜的润湿性,可以对生鲜食品起到很好的保鲜作用。采用模拟分析剖析了亲水涂层的防雾机理,结果表明该涂层材料在保鲜包装薄膜的防雾功能化应... 相似文献
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Practical details are presented concerning the use of strippable film for the production of moiré gratings. Strippable film is produced primarily for application in graphic arts. The influence of the use of the film on the accuracy of measurement in the direct moiré method is discussed. 相似文献
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针对当前钛种植体在临床使用中因界面不匹配导致的种植失败问题,从仿生学角度出发,采用提拉法在钛表面涂覆聚氨酯(PU)高分子涂层,并通过过饱和Ca-P溶液浸泡试验在PU表面原位矿化生成了无机沉积物.采用SEM、EDX、IR、XRD、DSC-TG及接触角测定仪等对矿化后PU表面的理化性能进行了表征和分析,并通过细胞培养试验初步考察了MG63细胞在矿化前后PU表面的增殖及生长情况.结果表明,PU表面矿化物是由纳米片状晶体先聚集堆叠形成团簇状微球,然后微球间互相融合生长而形成的,其成分主要是弱结晶的非化学计量的羟基磷灰石晶体,而且矿化后的PU涂层亲水性更佳,更利于MG63细胞的黏附及增殖. 相似文献
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Polyurethane (PU) film gave birth to free radical by 60Co-γirradiation under nitrogen atmosphere, and then the film was dipped into water-ethanol solution of β-hydroxyl ethyl ester
methacrylic acid (HEMA). After HEMA grafting with PU on the surface, PU-g-PHEMA (i.e. the grafted copolymer of HEMA onto PU)
film was dipped into antistatic agent (TN). The PU-g-PHEMA-g-TN (i.e. the grafted copolymer of TN onto PU-g-PHEMA) film that
has durable antistatic property on its surface was synthesized by PU-g-PHEMA film grafted with TN under catalysis of MgCl2. The grafted copolymers were characterized by ATR-FTIR spectroscopy, Electron Spectroscopy for Chemical Analysis (ESCA),
and Scanning Electron Microscopy (SEM), etc. The electrical property, thermal property, and mechanical behavior of PU after
antistatic modification were tested. The results showed that after antistatic modification the surface electric resistivity
of PU elastomer reached nearly 108 Ω class, with little change in a washing-fastness experiment, while its mechanical ability and thermal characteristic were
slightly decreased. The result of WAXD indicated that the regular construction degree of the grafted PU declined, the grafting
chains distributed randomly on the surface of PU. 相似文献