Formulation Design of Low Surface Energy Marine Antifouling Coatings

以国内低表面能高分子材料为基料,采用配方复配方法制备出一系列的环保型海洋防污涂料。利用接触角测量仪、扫描电子显微镜对产物进行了表征。结果表明:溶剂类型对涂料的漆膜性能存在较大的影响;而涂料中的颜料体积浓度(PVC)是影响涂料漆膜表面张力的主要因素。在临界PVC值时,涂料漆膜的表面张力最大,而在临界PVC值两侧,涂料漆膜的表面张力减小。A series of environmental friendly marine antifouling coatings were prepared with low surface energy polymer as main film forming material through formulation design,and the characher of the coatings was investigated by using contact angle measurement instrument and scanning electron microscopy.The results indicate that the type of solvent and the volume concentration of pigment(PVC) have great influence on the properties of the coatings,and the PVC mainly affects the surface energy of the coatings.海洋腐蚀与防护国家重点实验室基金项目(51449020205QT8703);; 福建省科技计划重点项目(2005H040

高速列车齿轮传动系统黏滑振动特性分析

为了分析黏滑振动时高速列车齿轮传动系统的扭转振动,考虑高速列车齿轮系统的时变啮合刚度和齿轮啮合误差,建立高速列车齿轮传动参数振动模型,分析了轮轨蠕滑率变化引起的齿轮传动系统扭转自激振动特性。结果表明,时变啮合刚度是齿轮传动系统发生谐波振动的主要原因,当蠕滑率超过最佳蠕滑率时,传动系统发生自激振动,系统响应出现稳定的极限环运动,自激振动不会改变系统振动主频,但使参数谐波振动更加明显,从而导致系统振动更为剧烈

一种氟硅两嵌段共聚物及其制备方法

申请号：200810070442.8 申请日：2008.01.08 名称：一种氟硅两嵌段共聚物及其制备方法 公开(公告)号：CN101235124 公开(公告)日： 2008.08.06 主分类号：C08F283/12(2006.01)I 分案原申请号： 分类号：C08F283/12(2006.01)I;C08G77/442(2006.01)I 申请(专利权)人：厦门大学 地址：361005福建省厦门市思明南路422号 发明(设计)人：罗正鸿;何腾云;戴李宗 专利代理 机构：厦门南强之路专利事务所 代理人：马应森一种氟硅两嵌段共聚物及其制备方法，涉及一种氟硅低表面能两嵌段共聚物。提供一种反应条件温和、反应产物结构明确且保留各嵌段原有的骨架结构、以及操作简便的氟硅两嵌段共聚物(聚二甲基硅氧烷-b-聚七氟丁基甲基丙烯酸酯共聚物)及其制备方法。氟硅两嵌段共聚物为聚二甲基硅氧烷-b-聚七氟丁基甲基丙烯酸酯共聚物。制备时，先制备溴原子封端的聚二甲基硅氧烷大分子引发剂；再制备聚二甲基硅氧烷-b-聚七氟丁基甲基丙烯酸酯新型两嵌段共聚物

一种氟硅三嵌段共聚物及其制备方法

申请号：200810070441.3 申请日：2008.01.08 名称：一种氟硅三嵌段共聚物及其制备方法 公开(公告)号：CN101215364 公开(公告)日： 2008.07.09 主分类号：C08F293/00(2006.01)I 分案原申请号： 分类号：C08F293/00(2006.01)I 申请(专利权)人：厦门大学 地址：361005福建省厦门市思明南路422号 发 明 (设计)人：罗正鸿;何腾云;戴李宗 专利 代理 机构： 厦门南强之路专利事务所 代理 人：马应森一种氟硅三嵌段共聚物及其制备方法，涉及一种氟硅低表面能三嵌段共聚物的合成。提供一种反应条件温和、反应产物结构明确且保留各嵌段原有的骨架结构、产物具有微相分离结构以及操作简便的氟硅三嵌段共聚物及其制备方法。为聚二甲基硅氧烷-b-聚甲基丙烯酸甲酯-b-聚七氟丁基甲基丙烯酸酯，制备时，先制备溴原子封端的聚二甲基硅氧烷大分子引发剂；再制备聚二甲基硅氧烷-b-聚甲基丙烯酸甲酯两嵌段共聚物大分子引发剂；最后制备聚二甲基硅氧烷-b-聚甲基丙烯酸甲酯-b-聚七氟丁基甲基丙烯酸酯氟硅三嵌段共聚物

海洋防污涂料的研究进展

海洋生物粘附在海洋设备(如船舶)上所造成的生物污损危害极大。为减少这类危害而出现了众多的海洋防污技术。其中在海洋设备上涂刷海洋防污涂料具有应用广、效果好及操作简单等优点,因而受到学术界及工业界的广泛关注。本文就海洋防污涂料的研究状况作一简要的综述,同时简要介绍我国在海洋防污涂料方面的研究与应用状况

The Latest Polymerization Research Advances of the Low-Surface-Energy Polymer

作者简介: 罗正鸿, 男, 博士、副教授, 研究方向为高分子材料及聚合工程; 通信联系人。E-mail: luozh@ xmu. edu. cn.[中文文摘]低表面能聚合物材料是低表面能材料中重要的一类。这类材料性能独特,用途广泛,尤其体现在涂料领域,用作防污涂层。目前,低表面能聚合物主要有氟碳树脂、有机硅树脂及氟硅树脂三种。有关这三种材料的合成研究十分活跃,出现了众多的合成研究报道。按合成过程对应的聚合机理划分,主要有基团转移聚合、阳离子聚合、阴离子聚合、自由基聚合、活性官能团间的反应。本文按聚合机理划分方法对低表面能聚合物近期的合成研究进展进行综述。[英文文摘]The low-surface-energy polymers are important for materials with low-surface-energy.They play an important part in many areas especially in coatings due to its special performances.Up to now,the polymers with low-surface-energy mainly includes fluorocarbons,organosiloxane and fluorosilicone.The latest synthesis researches on these polymers are quite active and are briefly presented in this paper on the basis of polymerization mechanism,which mainly contains group transfer,cationic polymerization,anionic polymerization, free-radical polymerization and reactions between living functional groups.海洋腐蚀与防护国防科技重点实验室基金项目(No.51449020205QT8703); 福建省科技计划重点项目(No.2005H040

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies