共查询到19条相似文献,搜索用时 93 毫秒
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海洋污损生物防除技术和发展(Ⅲ)——世界防污技术的历史和发展 总被引:4,自引:0,他引:4
本讲总结了船舶防污技术的历史发展过程和方向,包括最早的船体包覆铜皮技术,铜化合物防污漆,有机锡高聚物自抛光防污漆,无锡铜基自抛光防污漆,以及其它一些无毒防污漆,如低表面能防污漆,导电防污漆和生物防污技术等。 相似文献
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采用石墨炉原子吸收光谱法测定防污漆中的锡总含量.采用抗坏血酸作为基体改进剂,能有效的减少防污漆中的Cu对Sn的信号抑制和干扰,在Sn含量较低的情况下,能明显提高测定的灵敏度.该方法对检测防污漆中的锡总量是可靠有效的. 相似文献
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第五部分主要介绍船舶近海工程各领域中应用的防腐蚀涂料 ,包括车间底漆、防锈漆、船底防污漆、压载水舱漆、油舱漆、海上采油平台涂料、滨海桥梁保护涂料、海洋化工及相关工业设备保护涂料 相似文献
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几种浸海工程用材料表面生物粘膜中异养细菌的演化 总被引:2,自引:0,他引:2
比较了 4种浸海材料 (氧化亚铜防污漆、防锈漆、钢片和玻片 )表面粘膜中异养细菌的组成和数量。结果表明 ,粘膜中异养细菌主要由气单孢菌属、发光杆菌属、假单孢菌属、弧菌属、色杆菌属、莫拉氏菌属、产碱菌属、噬纤维菌属等组成。浸海初期的优势类群和先锋菌属为气单孢菌属 ,在整个试验过程中优势类群频繁发生演替 ,表面异氧细菌数量变动趋势基本一致。氧化亚铜防污漆和防锈漆表面的异养细菌数量多于钢片和玻片表面的异养细菌数量 ,异养细菌种类则少于钢片、玻片表面的 ,其中以防污漆表面异养细菌的数量为最多 ,达到 1 0 7cfu cm2 。 相似文献
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船舶防污漆加速试验方法研究 总被引:1,自引:0,他引:1
本文介绍了把防污涂料防污性能的静态实验和动态试验,动、静态渗毒率测试,SPC型自抛光防污漆降阻性能测试,漆膜形态剖析等有机结合建立起的一套切实可行的加速试验方法和配套设施。采用该方法可在1年内评定出3年防污期效的防污漆。 相似文献
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Anastasia Anna Foppoli Matteo Cerea Lucia Zema Andrea Gazzaniga 《Drug development and industrial pharmacy》2017,43(12):1919-1931
Dry coating techniques enable manufacturing of coated solid dosage forms with no, or very limited, use of solvents. As a result, major drawbacks associated with both organic solvents and aqueous coating systems can be overcome, such as toxicological, environmental, and safety-related issues on the one hand as well as costly drying phases and impaired product stability on the other. The considerable advantages related to solventless coating has been prompting a strong research interest in this field of pharmaceutics. In the article, processes and applications relevant to techniques intended for dry coating are analyzed and reviewed. Based on the physical state of the coat-forming agents, liquid- and solid-based techniques are distinguished. The former include hot-melt coating and coating by photocuring, while the latter encompass press coating and powder coating. Moreover, solventless techniques, such as injection molding and three-dimensional printing by fused deposition modeling, which are not purposely conceived for coating, are also discussed in that they would open new perspectives in the manufacturing of coated-like dosage forms. 相似文献
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系列环保型重防腐蚀涂料的开发 总被引:9,自引:1,他引:8
介绍了以改性环氧树脂为基料的无溶剂环保型功能涂料研制技术路线、主要技术性能、特性和施工工艺 ,并举例说明了它们在实际工程中的应用。 相似文献
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目的研究如何实现高效的无溶剂涂布,获得稳定的预定厚度涂层。方法在建立两辊间隙间涂布液流动数学模型的基础上,从涂布液辊间间隙分流分配关系和总结构内涂布液流量平衡两方面,分析无溶剂五辊顺转涂布系统涂布厚度的影响因素。结果转移钢辊和涂布钢辊的速比,计量辊和转移钢辊之间的间隙以及橡胶转移辊的压力等是对涂层厚度有直接影响的因子,毛细准数是涂层竖条道缺陷的主要影响因子,而涂布液的非牛顿特性会加重竖条道缺陷。结论设计无溶剂五辊顺转涂布系统时,需要综合考虑辊的直径、施加给橡胶辊载荷大小的范围、橡胶辊的硬度、适用涂布液的粘度范围和速度极限等因素。 相似文献
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热障陶瓷涂层的最新发展 总被引:11,自引:2,他引:9
综述了现代航空发动机用热障陶瓷涂层的最新发展,着重介绍了双陶瓷层,电子束物理气相沉积(EB-PVD)和溶液等离子喷涂(SPS)纳米热障陶瓷涂层的性能和特点。 相似文献
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Jianmin Chen Yuqin Qiu Suohui Zhang Guozhong Yang 《Drug development and industrial pharmacy》2015,41(3):415-422
Coated microneedles have been paid much attention recently, and several coating strategies have been developed to address the problems during coating process. However, there are still some unresolved issues, such as, precise control requirements, microneedle substrate contamination and high processing temperature. The purpose of this study was to develop a simple and controllable method to make uniform coatings on microneedles at room temperature. This novel method avoids the contamination of microneedle substrate by providing both the adsorption force of thickener and micro-scale coating film produced by a newly design device. Thickeners were screened to enhance the mass of coatings. The parameters that influence the coatings were tested systematically, which made coating process controllable. Finally, three model drugs were coated onto microneedles to prove the method is applicable more broadly. In addition, insertion experiments were carried out to test the drug delivery feasibility of the coated microneedles. In conclusion, this study presents a simple and controllable method to coat microneedles with small molecular chemical drugs or large proteins for rapid skin drug delivery. 相似文献