水处理用膨润土的改性方法研究进展

介绍了膨润土的提纯、活化、阳离子交换改型、柱撑膨润土、有机膨润土和无机有机膨润土的制备等方面研究的新进展,同时总结了目前膨润土改性中存在的问题,并对其发展前景进行了展望．     

改性呋喃树脂的研制

以苯酚、三聚氰胺为改性剂对呋喃树脂进行了复合改性.用正交实验法,通过测定树脂的粘度、游离甲醛、含氮量和抗拉强度等主要性能指标,考察了原料配比、pH值、温度对产品性能的影响,最终确定了改性树脂的最佳配比和适宜的工艺条件为:糠醇:苯酚:尿素:甲醛:三聚氰胺=0.90:0.30:0.95:2.60:0.03.     

硅氧烷表面活性剂在化妆品中的应用

介绍了硅氧烷表面活性剂的结构，种类和性能，及硅氧烷表面活性剂和其改性产品在化妆品中的使用。     

基于OBE的PLC实践课程教学设计研究

该文从工程教育专业认证毕业要求出发,以PLC课程设计课题"MSBR池控制系统设计"为例,贯彻工程教育专业认证OBE理念,对课程设计的教学环节进行教学设计。分析和研究工程的技术和运行管理现状,分析工艺流程和生产运行需求,通过技术经济分析,确定设计方案。从复杂工程系统中提炼出子系统和复杂工程问题,学生在实践过程中提升工程设计能力。设计成果证明,学生工程能力提高显著。     

Characterization of the organic materials used in the painting of the vaulted ceiling at the Saadian Tomb of Mulay Ahmed Al-Mansour (Marrakech)

The Saadian tombs from the era of sultan Ahmed al-Mansour (1574–1603) are beautifully decorated and have always been a major attraction for visitors to Marrakesh. The central mausoleum, named the Hall of Twelve Columns, encloses the tombs of Ahmed al-Mansour and his family. The hall has a huge vaulted ceiling, carved cedar doors, opening windows with wooden marquetry screen (Mashrabiya), and grey Italian marble columns. This paper presents the first attempt to identify the organic materials used by the Moroccan artisans. A GC/MS analytical procedure was used for the characterization of lipids, waxes, resins, pitch, tar, proteinaceous and saccharide materials in the same paint micro-sample. The analytical study identified the organic materials used in the polychrome and gilded decorations of the walls, ceiling and dome of the hall. Data showed that the polychrome decorations were painted using animal glue as a binder, and highlighted the treatment of the wall surface with linseed oil and the retouching of the paintings based on a saccharide binder. The use of a proteinaceous-resinous-oil mixture, applied on a proteinaceous preparation layer, for the gilded decorations revealed a very similar technique to that used at the time in Europe for mural paintings.     

The case study of an Italian contemporary art object: Materials and state of conservation of the painting “Ragazzo seduto” by Remo Brindisi

This paper deals with the scientific survey of Remo Brindisi's painting “Ragazzo seduto” (Seated boy), made at the end of the 1950s, that is a symbolic figure of both his personal artistic solitude and the crisis of values determined by the economic boom in the post-war period. In a period of great changes and economic regrowth, the need to find a new style that could be the most authentic and personal as possible pressed the artist to experiment innovative products, including non-conventional support. Photographic and analytical techniques demonstrated the use of innovative products as an experimentation tendency, that pressed the artist to use non-conventional support, industrially treated with plasticized PVC and primed with acrylate polymers and to paint with traditional and industrial pigments mixed with an oil-modified alkyd resin. In the span of a few years, an unexpected and extended degradation on the whole surface of the painting took place, with the consequent formation of lifting and detachment of the paint film. The detected alteration is mainly due to the fast ageing of the employed polymeric materials, actually responsible of the impermanence of many contemporary works of arts. Clarifying the unknown aspects of the Remo Brindisi's stylistic choices together with the deterioration processes of the employed painting materials, this paper highlights the general problems related to the conservation of contemporary art, a neglected area of research in Italy, where more efforts are committed to the enormous and more ancient cultural heritage.     

玻璃化温度测试在干式变压器浇注中的应用

介绍了环氧树脂的玻璃化温度测试实验,提出将玻璃化温度测试应用于干式变压器的浇注过程中。通过对玻璃化温度曲线的分析,判断其固化情况,及时了解干式变压器的浇注情况。对比玻璃化温度结果可以判断出浇注原料配比的值,从而了解设备情况,控制产品质量。