中央空调的水处理

本文扼要介绍了中央空调循环冷却水和冷冻水系统中常见的问题及其原因,并对冷却水和冷冻水的处理程序作了初步的阐述.     

聚醚砜膜原位清洗方法的实验研究

实验对已污染的聚醚砜膜进行了清洗的研究,并通过测量各种清洗剂清洗后膜水通量的恢复,确定适宜的清洗剂、清洗时间、清洗液浓度和操作压力,选择出最佳的清洗方案,取得较好的清洗效果。通过研究表明:被污染的聚醚砜膜用混合清洗剂清洗恢复率可达到85%,效果要明显优于单一的清洗方法。     

低氟含量低表面能自清洁氟碳涂料的研究

以氟单体和丙烯酸酯类单体通过聚合物的分子结构设计，合成了一类总氟含量不超过12％的低氟含量的含氟丙烯酸树脂，所制备的氟碳涂料的涂层的表面能低，具有自清洁功能。分析了该涂层中极性与非极性官能团的分子取向机理，测定了纯水水珠在不同含氟单体均聚物和共聚物清漆漆膜上以及在含氟丙烯酸树脂涂层上的接触角，探明了含氟丙烯酸树脂涂层的总氟含量与表面能的关系、含氟官能团在涂层中的分布，探讨了低氟含量的含氟丙烯酸树脂涂料的涂层自清洁机理。     

中央空调制冷机的化学清洗

阐述了中央空调制冷机结垢的类型及其产生的原因和危害,分析了中央空调制冷机的冷媒水系统、冷却水系统的化学清洗技术和操作方法.     

高压蒸汽发生系统的化学清洗

叙述了洞庭氮肥厂合成氨装置高压蒸汽发生系统以碱洗、酸洗、钝化为主要环节的首次化学清洗工艺，阐述了清洗机理，总结了清洗处理要点。     

硅整流元件纯水冷却系统换热设备的化学清洗

介绍了硅整流元件的纯水冷却系统换热设备化学清洗中药剂的评定筛选原则。质量标准，清洗工艺等。并对其清洗效果加以评定。     

Study of siloxane additives migration to the surface of polyester-(melamine)-polyurethane coatings: Aging effects after ethanol cleaning

This study determines the influences of siloxane flow agents’ migration on the outermost surface composition of clearcoats, before and after ethanol cleaning. This evaluation is undertaken to improve adhesion of pressure-sensitive adhesives (PSAs) on automotive paint systems. Most of the siloxane flow agents segregate from the bulk to the clearcoat outermost surface during curing. These additives can cover until 50% of the surface area but X-ray photoelectron spectroscopy (XPS) and time of flight-secondary ion mass spectrometry (ToF-SIMS) analyses indicate that they can be removed by ethanol cleaning. Composition of the cleaned clearcoats surfaces are similar as the composition of clearcoat formulated without siloxane additives: the polyester-(melamine)-polyurethane network is more detected than before cleaning. However, outermost surface analyses show that several aging weeks increase the siloxane additives segregation. This post-cleaning migration modifies the clearcoat surface composition and cancels the chemical modifications due to the ethanol cleaning. XPS analyses show that silicon concentrations after cleaning and aging are inversely proportional to the initial silicon concentrations measured after curing. It highlights that aging has to be controlled to improve adhesion of PSAs on clearcoats. A second ethanol cleaning on aged clearcoats is not effective to remove these new siloxane additives. Their formulation should be different from the flow agents and it could modify their solubility in ethanol. This result could also indicate that these new siloxane additives are not located on the last molecular layer of surface and they would not be soluble in ethanol.     

两种异噻唑防腐剂抑菌效果的研究

研究了两种异噻唑衍生物防腐剂的防腐最佳pH值，以及防腐剂对微生物的最低抑制浓度（MIC），确定了在洗洁精中，单一防腐剂的最低用量，对两种防腐剂在洗洁精中的混合使用亦进行了研究。     

对中国入世后洗涤剂工业形势及相关问题的分析 --国内外业界高层人士访谈

中国加入WTO后，中国洗涤用品行业面临着新的机遇与挑战，中国洗涤用品市场将面临更加激烈的竞争。由于环保的呼声越来越高，中国已开始在部分地区禁磷。中国洗涤用品工业将如何发展，其前景如何，专家的看法又如何，就这些问题本刊专访了有关人士。     

新建电泳涂装线投产前的准备工作

介绍了新建阴极电泳涂装线在投产前必须要做的一些准备工作。