荧光染料用于涤纶织物染色的荧光性能研究

在实验条件下，染色织物的荧光反射率随荧光染料的浓度增加而增加，超过一定浓度后，有下降趋势；在pH=5左右，荧光反射率最高；荧光增白剂会提高染色织物的荧光反射率，在荧光黄2GFL中，当荧光增白剂的浓度由0.1％增加到5％时，荧光反射率由8．43增加至18．59，而对非荧光染料只有增艳的作用，不产生荧光。荧光染料染色织物的荧光反射率随着加入非荧光染料量的增加而减弱。     

镁盐对印染废水脱色处理研究

用镁盐对印染工业酸性染料和混合活性染料废水脱色处理。考察了pH值和镁盐添加量等对脱色效果的影响，同时将镁盐和亚铁盐的脱色效果进行了比较。实验结果表明：镁盐具有良好的脱色效果，在镁盐添加量为600mg/L，pH值11．0－11．5的条件下，脱色率达91％以上，说明镁盐是一种安全、无毒、无害的“环境友好型”绿色水处理剂。     

Modeling of solid—liquid adsorption: Effects of adsorbent loads on model parameters

The adsorption of cobalt phthalocyanine dye onto activated carbon in a continuous stirred tank adsorber was studied. The variables investigated were: adsorbent mass, adsorbent particle size and fluid flowrate. Several models based on film, pore and surface diffusion were constructed and fitted to the experimental data. Experimental results showed: (i) the increasing importance of the film mass transfer resistance for increasing adsorbent loads; (ii) the increasing importance of the surface diffusion mechanism for increasing adsorbent loads; and (iii) the better discrimination among different models for higher adsorbent loads and lower flowrate.     

Preparation and properties of deep dye fibers from poly(ethylene terephthalate)/SiO2 nanocomposites by in situ polymerization

In this study, poly(ethylene terephthalate) (PET)/SiO₂ nanocomposites were synthesized by in situ polymerization and melt‐spun to fibers. The superfine structure and properties of PET/SiO₂ fibers were studied in detail by means of TEM, DSC, SEM, and a universal tensile machine. According to the TEM, SiO₂ nanoparticles were well dispersed in the PET matrix at a size level of 10–20 nm. The DSC results indicated that the SiO₂ nanoparticles might act as a marked nucleating agent promoting the crystallization of the PET matrix from melt but which inhibited the crystallization from the glassy state, owing to the “crosslink” interaction between the PET and SiO₂ nanoparticles. The tensile strength of 5.73 MPa was obtained for the fiber from PET/0.1 wt % SiO₂, which was 17% higher than that of the pure PET. The fibers were treated with aqueous NaOH. SEM photographs showed that more and deeper pits were introduced onto PET fibers, which provided shortcuts for disperse dye and diffused the reflection to a great extent. According to the K/S values, the color strength of the dyeing increased with increasing SiO₂ content. It is found that the deep dyeability of PET fibers was improved greatly. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007     

近红外吸收功能染料的合成

以缩合剂1，5-二苯胺-戊-1，3-二烯盐酸化物与1，3，3，5-四甲基-2-亚甲基吲哚啉为主要原料合成了1，3，3．5，1’，3’，3’，5'-八甲基吲哚三碳菁近红外吸收染料，收率达61．5％，采用熔点测定、元素分析、IR验证了产品的结构。通过电子吸收光谱测得其最大吸收波长为760nm。     

某些硫碳菁染料在溴碘化银乳剂中聚集态的研究

本文应用三种不同晶形的溴碘化银乳剂(立方体、八面体和T-颗粒)和八种硫碳菁染料(大部分为内铵盐结构染料)进行了染料的聚集态的研究。试验结果表明,染料的J-聚集态的形成主要取决于染料的结构,其次依赖于卤化银的晶形。三种不同结构的表面活性剂对染料聚集态的形成均有影响,其中两性的表面活性剂最强,阴离子的表面活性剂次之,中性的表面活性剂最弱。二种中位甲基取代的硫碳菁染料的聚集态受表面活性剂影响最为明显,形成较强的J-态,而对其它六种染料的聚集态影响较小,J-聚集态稍有增强。     

CD-R存储介质选择经验谈

目前在教育、科研及图书档案等领域中,CD-R碟片被广泛用于数据存储,使得碟片的选择成为信息安全存储的一个重要环节。本文从碟片的组成及刻录机理出发,结合计算机软件,论述了CD-R碟片的选择方法,为信息的安全存储提供借鉴。     

染料分散剂新原料-高沸醇木质素的研制

采用1，4-丁二醇水溶液为溶剂的高沸醇溶剂法，从松木，杉木，稻草等原料制备纤维素与高沸醇木质素。使用上述原料，在70%-90%1，4-丁二醇水溶液中添加少量催化剂。并在190℃-220℃条件下蒸煮1-3小时后，分离反应产物，得到固体纤维素与高沸醇木质素-丁二醇溶液，不溶于水的高沸醇木质素通过加水沉淀的方法。从反应后的液体混合物中分离。高沸醇木质素具有较高的反应活性。灰分含量很低。适于制备新型染料分散剂，有广泛应用前景。     

活性染料染色废水的日光脱色降解

在太阳光照射条件下，使用铁(Ⅲ)-草酸盐络合物／H2O2对存在于水中三种中温型活性染料进行光催化降解研究，重点考察了太阳光的强度和活性染料的浓度对脱色降解反应的影响结果表明：太阳光的强度低于50001ux，染料的脱色率低于40％；在高于400001ux、照射60分钟脱色率高于98％，在高于900001ux时，照射10分钟，可使活性蓝MS脱色率接近100%，太阳光的强度越高，溶液中的染料浓度越低。     

Photoalignment dynamics of azo dyes series with different coordination metals

There are many photoaligned azo dyes that can be used for orientation of liquid crystals in various display devices. However, the structure of these compounds needs to be optimized to increase the rate of the process of molecule photoalignment, as well as to spread the application of these compounds. The main coordination metal that presents in the molecules of azo dyes is sodium derivatives. The use of other alkali metals remains an open question. We used quantum‐chemical computation methods and reversible intermolecular bonding model to determine the effect of metal coordination on the velocity of photoalignment. The theoretical predictions were experimentally verified using sodium, potassium, lithium, and cesium salts of the model azo dye synthesized by us. We conclude that potassium azo derivatives are the fastest, ceteris paribus.