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紫外光照射下颜料的表面改性 总被引:1,自引:0,他引:1
为提高有机颜料在水中的分散性(D.E.),研究了颜料P.R.254、P.R.255和P.V.19在紫外光照射下的表面改性。经紫外光照射后,颜料在水中的D.E.均得到明显提高,即使经过长时间静置(如24h),其D.E.仍比未处理的样品高。对于P.R.255,D.E.可提高74.0%;对于P.R.254,D.E.可提高67 4%;对于P.V.19,D E 可提高100.0%。在相同光强度下,对于P.R.255和P.V.19,照射时间越长,颜料的D.E.越好;对于P.R.254,照射时间延长,D.E.下降,但仍比未处理样品高。光强度对颜料D.E.的影响无规律性。还比较了处理后颜料的色光、透明度、墨色及流动性。 相似文献
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近日,我们核查发现,一些不法网站(如www.zgqkjl.com,www.xueshuzz.com,www.wenxuanzz.com,www.pkxueshu.com,www.360qikan.com,www.zhazhi.com,www.lunwentianxia.com,www.59165.com等)假冒《硫酸工业》杂志官方在线投稿平台或官方投稿邮箱名义,收取版面费和审稿费。经核查,国内存在很多此类不法网站。 相似文献
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(1)专著顺序号著者.书名.版本,其他责任者.出版地:出版者,出版年.文献数量(选择项)示例如下:1薛华成.管理信息系统.北京:清华大学出版社,1993.230页2霍斯尼R K.谷物科学与工艺原理.李庆龙译.北京:中国食品出版社,1989(2)专著中析出的文献顺序号作者.题名.见(In):原文献责任者.书名.版本.出版地:出版社,出版年.在原文中的位置示例如下:3黄蕴惠.国际矿物学研究方向.见:程裕淇编.世界地质科技发展动向.北京:地质出版社,1982.38-39 相似文献
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《现代技术陶瓷》2014,(6)
<正>(1)专著顺序号著者.书名.版本.其他责任者。出版地:出版者,出版年.文献数量(选择项)示例如下:1薛华成。管理信息系统,北京:清华大学出版社,1993,230页2霍斯尼R K.谷物科学与工艺原理,李庆龙译.北京:中国食品出版社,1989(2)专著中析出的文献顺序号作者.题名.见(In):原文献责任者.书名。版本.出版地:出版社,出版年.在原文中的位置示例如下:3黄蕴惠.国际矿物学研究方向.见:程裕淇编.世界地质科技发展动向.北京:地质出版社,1982.38-394 Brouwer R,Dewit C T.A simulation model of plant growth with special attention to root growth and its consequences.In:Whittington W J,ed.Root Growth.London:Butterworth,1969.224-244 相似文献
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食品调香随着时代的不断发展,各种天然和合成原料的不断开发与创新,满足了各种食品用香精的需求,尤其是合成香料品种的大幅度地增加以及反应类香料和发酵类香料取得了进展后,食品用香精的配制条件比过去丰富优越得多,它的应用范围也不断扩大,食用香精也越分越细,针对性也越来越强,食品香精大约可分类:1.糖果型;2.饼干型;3.糕点型;4.酒用型;5.烟草型;6.奶制品;7.牙膏型;8.饲料型;9.制药(药用)型;10.粉末型(汤料和休闲食品);11.坚果型;12.蔬菜型;13.海鲜型。食品香精状态分类:1.水溶性食品香精。2.油溶性食品香精。3.乳化食品香精。4.粉末食品… 相似文献
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采用反气相色谱法测定了不同极性的溶剂与聚乙二醇 ( PEG)的热力学相互作用参数 χ1 2 ,并探讨了色谱柱中 PEG在载体上的涂布量以及 PEG的分子量对相互作用参数的影响。研究结果表明 :在 60~90℃的温度范围内 ,烷烃类溶剂与 PEG的相互作用较弱 ,是 PEG的非溶剂 ;而乙酸乙酯和甲苯与 PEG的相互作用较强 ,是 PEG的良溶剂。流动相中溶剂探针分子仅在 PEG液膜的表层与其相互作用 ,χ1 2 的大小与PEG在载体上的涂布厚度以及 PEG的分子量无明显的相关性 相似文献
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Various aspects of alkyd emulsion technology have been investigated. The influence of alkyd oil length, acid value and hydroxyl number and type of surfactant used as emulsifier, on shear stability of alkyds emulsions have been studied. It was found that the acid value was the most important alkyd parameter, the stability increasing with increasing oil length. It is also shown that anionic surfactants give emulsions with small droplet sizes at lower concentrations than do nonionics. Polymerizable nonionic surfactants have been tested as emulsifiers and compared with conventional surfactants of the same hydrophilic lipophilic balance (HLB). It was found that surfactants capable of participating in the autoridative curing process give faster drying and improved film hardness compared with nonreactive surfactants. The distribution of driers between the alkyd phase and the water phase has been investigated. It was found that low pH and the use of hydrophilic anionic surfactants, such as sodium dodecyl sulphate, favour partitioning of cobalt into the aqueous phase which is unfavourable with respect to drying properties. 相似文献
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深圳固戍污水处理厂一期工程目前已投入运行,采用改良型A2/O活性污泥工艺,处理效果良好。文章主要探讨该工艺的具体设计。该工艺是将A2/O生物处理工艺与氧化沟池型的有机结合,不仅具有良好的生物脱氮除磷功能和较强的抗负荷冲击能力,而且节省生物池混合液回流能耗,在处理以合流制为主的城市污水方面具有良好的处理效果。 相似文献
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An experimental study was performed on the attrition of the bed materials in a recirculating fluidized bed (RCFB) using Indian standard (IS) grade I sand (size between 2.0 and 1.0?mm) at ambient conditions. Experiments were performed with superficial air velocity ranging from 7.13 to 9.16?m/s, bed inventory of 7–10?kg, and a spacing of 0.085?m between the jet top and draft tube bottom. The main objective of the study was to investigate the effects of operation time on the attrition and size distribution of sand particles in a RCFB. It was noticed that the prime mode of attrition of bed materials was abrasion, not fragmentation. Reduction in the downcomer bed height was observed with increasing operation time. It indicates that attrition was significant and fines were elutriated out with the fluidizing air. Furthermore, variations in the shape, size, and harmonic diameter of particles were studied with increasing operation time. It has been observed that the coefficient of uniformity and coefficient of curvature showed increasing patterns. It specifies that particles of different size ranges and fines were formed due to attrition of particles. At the end of the operation, it was found that a significant amount of fines was elutriated with fluidizing air from the reactor. 相似文献
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伴随环保要求的提升和人们环境意识的提高,水玻璃作为一种环境友好型粘结剂受到广大研究者以及消费者的垂青。但水玻璃因其自身的结构而导致的固化后耐水性差的问题尚未得到彻底的解决及其不同的固化途径而产生的固化机理亦是琳琅满目,从而使水玻璃在其应用原理以及解决其相应的缺陷上受到阻碍。故文中对近几年来所研究的水玻璃固化机理以及提高其耐水性途径上进行了详细的分析以促进和拓宽水玻璃的改性研究及应用领域。 相似文献