A facile synthesis of carbon black fluid grafting by polyetheramine using neutralization reaction

Nanoscale ionic materials(NIMS) based on carbon black(CB) were prepared through a facile method. Firstly, CB was oxidized in the mixture of nitric acid and sulfuric acid, resulting in a large amounts of –COOH on surface of CB. Then oxidized CB was grafted by polyetheramine through neutralization reaction between-COOH of CB and-NH2- of polyetheramine, and CB derivatives were obtained. This surfacefunctionalized CB can behave as liquid at ambient temperature in the absence of solvent by carefully varying the components. FTIR and thermaogravimetric analysis confirmed that the successively grafting of polyetheramine. TEM revealed the monodisperse core-shell structure of CB derivatives particles. The viscoelasticity of CB derivatives were closely related to the molecular weight and loading of polyetheramine. The unique core- shell and ionic structure and flowability of these CB derivatives could guide our future work on obtaining NIMs with tunable and controllable properties and broaden its commercial applications.     

斗转星移 “嫁接”Windows7桌面特性

和Vista相比Windows7的改进远不止更华丽的界面那样简单,除了超级任务栏外增强的桌面特性也让很多操作更加方便,但遗憾的是这些桌面特性并不能通过升级补丁来直接在XP或Vista系统中使用。如果想在其他Windows系统中体现这些特性也并不是没有办法的,下面就来让这些功能“嫁接”到Windows系统中。     

产品设计中符号的嫁接与置换

分层论述了什么是产品设计中符号的嫁接与置换,继而引出嫁接与置换在产品符号构成中的重要意义。并提出在非物质化的符号消费时代,设计师须注意产品设计中符号嫁接置换的原则与误区。     

黄瓜嫁接技术及管理要点探讨

黄瓜不仅含水量极高,其中还蕴含着十分丰富的维生素C、钙、糖类等,同时也具有一定的细纤维素,有利于排泄人体中的腐败食物,促进人体健康。当前黄瓜嫁接技术也是多种多样,比如插接法、靠接法等等,这些方式都能提高黄瓜的产量和质量。基于此,从黄瓜嫁接技术的准备工作、黄瓜嫁接技术、管理以及病虫害的防治等四个方面进行分析,希望对相关人员有所帮助。     

嫁接决策树用于相似疾病诊断研究

对于相似性疾病的区别诊断,年青医师可能缺乏经验,经验丰富的医师可能由于经验而容易忽视。如何利用数据挖掘领域中的决策树方法对相似性疾病的诊断给予辅助是本文的目的。本文基于疾病的诊断规则表通过嫁接决策树方法,实现在一棵决策树上对多种相似疾病进行诊断,使医师快速找到疾病判别的分界点,尽早确定较有针对性的诊断方案,避免误诊和医疗资源的浪费,以及缩短病人就诊周期,减轻患者病痛和经济负担。嫁接决策树也可以提高医师对患者可能同时患有多种疾病或存在最可能演化的另一种病种的警觉性,有助于尽早检查或做好预防。     

理想主义的城市改良

"趣城"是令人兴奋的项目!与其说是项目,不如说是尝试,是严谨的官僚机制与散漫的创作机制间大胆的嫁接实验."趣城"是建筑师主动发现城市问题,进而向政府提出动议,经过碰撞和协商一致后,立项成为政府项目实施.立项的流程照走不误,但是与常规项目不同,这次建筑师更主动,而不是迫于政府部门的规定.整个过程像是"倒叙"的故事环节.     

浅议大棚黄瓜嫁接技术

蔬菜大棚中,黄瓜的嫁接是其高产、稳产的关键技术。文中对嫁接场所、用具,以及嫁接方法作了简要的分析与研究。     

后现代规划设计理念在历史街区更新保护中的应用

后现代理论认为城市充满复杂性、多样性和不确定性,应重视对历史文脉的延续和人的多种需求,主张用动态、高兼容性、可持续发展和延续文脉的方法去解决城市问题和规划城市.基于后现代规划设计理念,在历史街区更新保护中可借鉴"嫁接更新理念",重视对历史建筑的"改造再利用",实施"弹性发展单元""刚性 柔性"的功能控制,协调社会多元主体的利益.     

PE膜表面接枝间苯二酚

Low density polyethylene film surface-grafted process. Firstly, acrylic acid was grafted to the surface grafting. Secondly, the carboxylic groups in poly （acrylic resorcinol was prepared by a sequential of low density polyethylene by UV photoacid） chains were transferred to acyl chloride groups by the reaction of carboxylic groups with thionyl chloride. The stability of acyl chloride groups in several solvents （alcohol, water, acetone, aqueous NaOH and in N2 atmosphere） was investigated, and N2 atmosphere and acetone were appropriate media to protect acyl chloride groups from side reaction. Finally, resorcinol monomer reacted with acyl chloride to append to the poly（acrylic acid） chains at room temperature. FT-IR ATR was used to characterize the change of carbonyl groups during each step of the grafting process. Furthermore, by the experimental data of gravimetric analysis the grafted resorcinol monomer on the surface of low density polyethylene film was verified to have undergone condensation with acetone further in the resorcinol/acetone solution at 56℃, which might be a useful feature for synthesizing a thermoplastic/thermosetting composition.