荧光增白剂的分散状态及其对PP白度的影响

通过使用透射电子显微、相差显微和粒度分布分析,对荧光增白剂OB和OB1的形态及在PP中的微观状态进行了研究,并结合对PP增白样板白度的测定,找到荧光增白剂分散状态与试样白度的关系。结果表明:荧光增白剂OB和OB1在添加量为0.02%～0.03%时,其在PP中大部分是以粒径小于5μm的凝聚体形式存在的。此时荧光增白剂对PP有最佳的增白效果,可将试样白度提高5～7。添加量低于0.02%时增白效果不明显。添加量高于0.03%时,由于荧光增白剂与PP相容性的关系,凝聚体开始形成大尺寸团聚体,此时增白效果下降,甚至降低试样白度。荧光增白剂的热性能和结晶性能的测试也被用来辅助上述研究。研究表明:尽管两种荧光增白剂OB和OB1的热性能和结晶性能相差较大,但它们的分散状态及对其白度的影响是类似的。     

PET白色母粒的制备及性能研究

对不同钛白粉、荧光增白剂及用量对PET白色母粒的性能影响进行了研究。结果表明,钛白粉中铁含量影响PET母粒的白度;不同荧光增白剂对PET母粒的增白效果不同,KSN增白效果较OB和OB-1更好;荧光增白剂KSN含量越高,增白效果越好。     

荧光增白剂在PP,ABS中的应用研究

本文对不同牌号的荧光增白剂及其不同用量对PP及ABS的增白效果与其耐候性能作了详细的报导。实验表明复合增白剂的增白效果有一定加和性,同时指出增白剂用量太大,反而降低增白效果。     

混合型荧光增白剂增白尼龙-11

使用荧光增白剂CBS-X和萘酰亚胺作为荧光增白剂对尼龙-11(PA-11)进行增白,并使用WSD-3C型全自动白度计测试其白度.实验结果表明:两种荧光增白剂有明显的加和增效作用.当其在11-氨基十一酸中的总含量为0.01%,且混合比例为1:1时,产生的增白效果最好.     

荧光增白粘胶长丝的试纺

介绍了荧光增白粘胶长丝的纺制试验。试验探讨了荧光增白剂的选择、纺丝粘胶中增白剂的加入量、增白剂的加入方法。试验结果表明,荧光增白粘胶长丝增白效果明显,白度值比普通粘胶长丝增加50%。     

造纸用荧光增白剂VBL白度的测定

荧光增白剂VBL已广泛用于造纸行业。传统上实验室用来检验荧光增白剂在纸上白度 (增白效果 ) ,主要是采用直接添加荧光增白剂于纸浆中 ,然后再制成纸 ,用白度仪 (或计 )测其白度。这种方法费时 ,并且纸浆的供应与保存也比较困难。本文结合造纸用荧光增白剂VBL国家标准的修订 ,对该荧光增白剂白度的测定方法进行了研究。确定了一种新的简单易行的白度测定方法。     

液体荧光增白剂220/210的化学复配增效研究

以三聚氯氰、对氨基苯磺酸、DSD酸、吗啉、二乙醇胺为主要原料,采用化学复配法对荧光增白剂220/210的增效作用进行了研究,考察了化学复配对增白剂增白效果的影响。结果表明:化学复配可显著提高荧光增白剂的增白效果,其中最佳工艺条件下荧光白度可提高1.9,甘次白度可提高2.6。     

不同白度测试仪器在荧光增白剂增白性能评价上的差异

此文选用不同色谱纯度的荧光增白剂C.I.220（APC）,分别采用染纸和染布两种方法来评价其增白性能.采用分光测色仪、色差计和白度仪中的相应白度指标对被增白的纸张和棉布进行测试,通过对实验数据的分析,发现分光测色仪是评价荧光增白剂增白性能的适宜仪器,对纸张来说应用白度指标来衡量荧光增白剂的增白性能更适宜,对于棉布来说应用白度和增白强度来衡量荧光增白剂的增白性能均适宜,对于APC来说,染纸法更适宜于评价其产品应用性能.     

丙纶高效荧光增白母粒研制

本文论述了荧光增白母粒的增白原理,对荧光增白母粒的配方进行了研究,认为母粒添加量为１￣１．５％合适,分析了辅助添加剂对荧光增白效果及可纺性的影响。     

含磺酸钠基团的二苯乙烯联苯类荧光增白剂增白性能的研究

合成了3个含不同数目磺酸钠基团的二苯乙烯联苯类荧光增白剂,利用1H NMR和红外光谱确证了其结构。采用浸渍法对棉布和涤纶进行增白,得到了不同浓度的增白剂对棉布和涤纶的增白效果。研究结果表明,3个增白剂均对棉布和涤纶具有较高效率的增白效果,当增白剂浓度为0.05%o.w.f和0.4%o.w.f时,涤纶和棉布的白度最大可分别提升到180.592和151.733。随着增白剂所含-SO_3Na (磺酸钠基团)数目的增加,棉织物白度增加。然而,随着增白剂所含-SO_3Na (磺酸钠基团)数目的增加,涤纶织物的白度反而降低。该研究可为含-SO_3Na的二苯乙烯联苯类增白剂在棉布和涤纶中的应用提供思路,为更好地设计与合成性能优异的二苯乙烯类荧光增白剂提供指导。     

荧光增白剂在洗涤剂中的应用及其发展

介绍了荧光增白剂的增白机理、基本结构类型、毒理及生态安全性。荧光增白剂在洗涤剂中的典型用量为0.15%。详尽描述了荧光增白剂在洗涤剂中的作用及影响因素，并分析了国内外荧光增白剂的市场及市场发展趋势。     

Effects of sulfonation on bis-styrylbiphenyl fluorescent whitening agents for polypropylene

Three derivatives of bis-styrybiphenyl with different degrees of sulfonation to be used as fluorescent whitening agents (FWAs) were synthesized. Studies on their spectroscopic properties were performed using a combination of computational methods. Whitening effects of FWAs and the improved thermal stability of polypropylene (PP) were investigated. The morphology of plastic samples was examined by scanning electronic microscopy (SEM). In order to improve the compatibility between FWA and PP, PP grafted with maleic anhydride (MAH) was applied as compatibilizer. The optical properties were further clarified by the results of frontier molecular orbital modeling, which show that the presence of sulfonic sodium group leads to a red shift of maximum UV absorption wavelength and a low HOMO–LUMO energy band gap. It is observed that the addition of 0.010 wt % of the sulfonated FWA would result in the expected whitening effect as well as improved PP thermal stability, while at or above 0.015 wt %, such effects worsen sharply owing to phase separation. Furthermore, the use of MAH-grafted PP as compatibilizer results in improvement of phase behavior and thermal stability. The study provides new insights into the effect of FWA structure on the properties of PP that are related to the whitening of the material. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47635.     

我国塑料用荧光增白剂市场现状

荧光增白剂用于白色塑料制品可显著改善产品外观的白度和光亮度,提高其商业价值。本文介绍了我国已生产的用于塑料领域荧光增白剂主要有双苯并(?)唑类型、二苯乙烯基苯类型及二苯乙烯基联苯类型共8个品种,并列出了国内主要生产企业。我国的塑料用荧光增白剂行业尚存在重复建设严重的现象,整个行业处于小、散、低的水平;科技投入少,发展后劲不足;产品标准化工作滞后;市场开发和服务需进一步加强。     

荧光增白剂及其在尼龙11中的应用研究

阐述了荧光增白剂（FWA）的增白机理,介绍了一些适用于尼龙11的荧光增白剂及其用于尼龙11中应注意的问题。FWA今后的发展方向为研制环保型品种、良好性能产品的国产化和FWA复配增效的研究等。     

荧光母粒在聚丙烯纤维生产中的应用

介绍了高流动性荧光母粒在聚丙烯纤维（ＰＰ纤维）生产中的应用情况。结果表明,荧光母粒在ＰＰ纤维生产中具有流动改性和增白增艳双功能作用。荧光母粒与ＰＰ共混纺丝显示出优良的可纺性,所生产的荧光丙纶外观光亮、鲜艳、柔和,有效地提高了ＰＰ的装饰性能。     

荧光增白剂BL和BW的应用研究

研究了荧光增白剂BL、BW、CF-351、CBS-X对洗衣粉的粉体白度、棉织物白度、棉织物色光等的应用效果.结果表明,荧光增白剂BL和BW在洗衣粉粉体白度、棉织物白度、棉织物色光等方面都较传统CF-351、CBS-X应用效果有较大提高,其中BL应用效果优于BW.     

聚丙烯复合材料弯折发白成因分析及改善

随着聚丙烯(PP)材料在汽车领域的应用频率逐渐升高,汽车零部件由于受到外力产生的外观问题亟需解决.采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)相结合的方法研究了 PP复合材料在常温下弯折发白的产生机理及其影响因素.探讨了 PP种类、增韧剂种类、相容剂种类,以及色粉含量对PP耐弯折发白的影响.结果表明:选用均聚...     

Impact of fluorescent whitening agent excitation on White Balance Algorithms

Various white balance algorithms, based either on the Gray World assumption or on the Retinex theory, have been developed to remove the color cast of illumination in images. Though most man‐made white objects contain different amount of fluorescent whitening agents (FWAs) to enhance and create different degrees of whiteness appearance, the FWA excitation has seldom been considered in white balance algorithms. In this study, four illuminants, comprising 2 levels of CCT and 2 levels of UV/violet radiations, were produced to illuminate a setup, which included a Macbeth ColorChecker and a calibrated whiteness standard. Three whiteness standards containing different amount of FWAs were used under each illuminant, with one present each time. It was found the FWA excitation generally caused little color difference to the algorithms based on the Gray World assumption, which was likely due to the small size of the whiteness standard in the image. In contrast, the performance of the algorithms based on the Retinex theory was largely affected by the FWA excitation, as the FWA excitation affected the RGB values of the pixels for adjusting the gain factors. Given the wide usage of blue‐pumped white LEDs that contained little UV/violet radiation for enhancing luminous efficacy in general illumination, the impact of the FWAs is not trivial and should be considered in developing white balance algorithms.     

纳米CaCO3填充ABS/PP合金复合物研究

通过熔融共混使纳米CaCO3粒子周围包覆上一层TPE橡胶,制备出纳米CaCO3母料,用其与PP、ABS共混复合制备出ABS/PP合金纳米填料复合物.该复合材料力学性能及熔体流动性能测试结果表明,纳米CaCO3含量在试验用量范围内,ABS纳米CaCO3复合物的拉伸强度随填料含量的增加而增加,当母料含量为17%,母料中纳米CaCO3填料含量为60%左右时有较佳的冲击性能;ABS/PP纳米CaCO3复合物在PP含量9%～10%时有最好的拉伸强度和冲击强度;纳米CaCO3填料含量对复合物的拉伸强度影响不大,随其用量增加对冲击强度有明显的提高;熔体流动性能在PP含量10%左右时达最大,但随填料含量增加而下降.