共查询到19条相似文献,搜索用时 78 毫秒
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季铵盐型阳离子聚合物的合成及其在超细颜料中的应用 总被引:5,自引:0,他引:5
采用自由基溶液聚合,制备了甲基丙烯酰氧乙基三甲基氯化铵-苯乙烯-甲基丙烯酸甲酯三元共聚物,并用此阳离子聚合物作为分散剂制备超细有机颜料分散体系。用FT-IR和13C-NMR分析、表征了共聚物的结构,用GPC研究了聚合物的分子量及分子量分布,用滴定法测定了聚合物中阳离子单体含量。结果表明:聚合物的结构及用量对颜料分散体系的影响较大,当聚合物中阳离子单体含量为59.5%-69.7%,mAIBN/mM=0.010-0.012时,颜料的粒径最小且体系的稳定性最好,阳离子聚合物质量分数大于0.004时,分散体系的分散性能较好。 相似文献
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表面亲水性粒度单分散交联PMMA树脂的合成及表征 总被引:4,自引:0,他引:4
用种子溶胀聚合方法 ,合成出了粒度单分散的交联聚甲基丙烯酸甲酯微球 .将微球通过水解 ,使其转化为表面带羧基的树脂 .分别用多糖化合物Dextran和DEAE Dextran对水解树脂表面进行包覆涂层 ,然后用n 丁二醇双环氧丙醚分别进行交联 ,制备出两种表面带高交联多糖覆盖层的树脂 .以两种改性树脂为填料 ,以人血清蛋白为试样 ,用HPLC方法对树脂的亲水性能进行了表征 .研究表明 ,两种改性树脂均有很好的亲水性 ,蛋白质的回收率分别在 97%和 99%以上 ,并有良好的机械强度和化学稳定性 相似文献
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亲水单分散聚合物基质阳离子色谱柱的制备及其应用 总被引:2,自引:0,他引:2
以自制5.0 μm单分散大孔亲水交联聚甲基丙烯酸环氧丙酯微球为基质,合成一种新型弱酸性阳离子色谱填料.选用甲烷磺酸作淋洗液,在流速为1.0 mL/min时,对6种无机阳离子(Li+, Na+, NH+4, K+, Mg2+, Ca2+)和有机胺进行了良好分离.考察了淋洗液种类、浓度以及流速对6种无机阳离子分离的影响,选择了合适的色谱分离条件.测得6种离子在一定浓度范围内具有良好的线性关系和低的检出限.将其用于决明茶中阳离子的分析,4种离子在20 min内完全分离,各离子标准加入回收率在96%~107%之间.此色谱柱的分离效果与Dionex IonPacCS12A商品柱接近,但分析时间缩短了44 min. 相似文献
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合成了铬酸氢根季铵盐树脂,以它作为一种选择性氧化剂应用于烯丙醇的氧化反应,考察了温度、时间、溶剂、树脂与醇的物料比对氧化反应的影响。在优化的反应条件下,即以苯为溶剂,n(树脂):n(醇)=3.5:1,回流12h,丙烯醛产率达60.65%。实验表明,该季铵盐树脂能有效地将烯丙醇选择性地氧化为丙烯醛。 相似文献
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Christiana Agbo Wizi Jakpa Bismark Sarkodie Andrews Boakye Shaohai Fu 《Journal of Dispersion Science and Technology》2018,39(6):874-889
In the quest of ensuring successful pigment dispersion, additives are used to aid dispersion and stabilization of pigment particles through attraction forces of various chemical nature including van der waals and “liquid bridge” forces as well as anchor groups with high affinity for pigment surface. On the other hand, dispersion efficiency is significantly dependent on the effectiveness of various dispersion equipment and their energy transfer, dispersion force and effectiveness. The common denominator for all this equipment are that; dispersion is achieved by shearing forces produced by the application of high positive and negative attrition. This article reviews and explores the nature and the significance of the various methods and forces in pigment dispersion and the various stabilization mechanisms adopted in producing stably fine pigment particles, dispersion application as well as future prospects. 相似文献
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Kuanjun Fang Xue Jiang Chaoxia Wang Min Wu Youdi Yan 《Journal of Dispersion Science and Technology》2013,34(1):52-57
Dispersions of four nanoscale hydrophilic cationic pigments were prepared by micro jet milling process, in which the dodecyl trimethyl ammonium chloride (DTAC), tetradecyl trimethyl ammonium chloride (TDAC), hexadecyl trimethyl ammonium chloride (CTAC), and octadecyl trimethyl ammonium chloride (STAC) were used as the dispersers respectively. Zeta potential, particle size, viscosity and dispersion stability were tested. The effect of the hydrophobic chain of cationic quaternary surfactant on pigment dispersion's properties was discussed. The results showed that good dispersion effects were obtained when the hydrophobic chain were 14 or 16. 相似文献
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C. S. Sanmathi 《Journal of Dispersion Science and Technology》2013,34(4):511-516
The influence of adsorption of polymers containing different functional groups on the dispersion behavior of pigment particles has been investigated in water. The polymers chosen are styrene‐maleic anhydride copolymer modified with three different amines, tris (hydroxymethyl) amine, semicarbazide, and thiosemicarbazide of different hydrophilicity, to yield the corresponding grafted amic acids. The modified graft copolymers were characterized by Fourier transform infrared spectroscopy and 1H‐nuclear magnetic resonance spectroscopy. Application of these amic acids as a dispersing agent to disperse titanium dioxide in water was studied. The Daniel flow method was used to assess the dispersing ability of these amic acids, and it was found that all the synthesized dispersants showed dispersion action on the pigment particles. 相似文献
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Fu Shao‐Hai 《Journal of Dispersion Science and Technology》2013,34(7):971-974
The waterborne ultrafine pigment C.I.P.B15∶1 dispersion was prepared with copolymer by the phase separation method. The shape and size distribution of ultrafine pigment particles were investigated, and the effects of pH value, ion intensity, and alcohols on ξ‐potentials were analyzed. The results showed that stick‐shaped particles with narrow distribution were obtained, ξ‐potentials obviously increased with increasing of pH value in the range of 5–9, and when the pH value was at 8–9, the ξ‐potential reached its maximum. Moreover ξ‐potentials decreased with increasing ion intensity, decreased by adding the alcohols into the dispersion, and also decreased with increase in the dosage of Triton TX‐10. 相似文献
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Shao‐Hai Fu 《Journal of Dispersion Science and Technology》2013,34(1):115-119
Stability of waterborne nanoscale pigment red 122 dispersion that used copolymer of styrene and maleic acid as modification reagent was affected greatly by additives. In this article, the effects of pH value, ion intensity, and alcohols on centrifugal stability and stability to temperature were investigated. The results showed that pigment 122 dispersion with high centrifugal stability was obtained and the particle size was changed small when treated with different temperature at pH value in the range of 7.70~8.96. Centrifugal stability and stability to temperature were decreased with increasing concentration electrolyte, especially with AlCl3 and MgCl2. Alcohols had no negative effect on centrifugal stability and stability to temperature of waterborne nanoscale pigment red 122 dispersion. 相似文献
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双马来酰亚胺树脂增韧进展 总被引:6,自引:0,他引:6
双马来酰亚胺树脂是一类新型耐热高分子,应用日趋广泛。针对其脆性近年人们开展了大量增韧研究并取得明显效果,本文拟对这方面的进展给以系统介绍和评述。 相似文献
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新型复合环氧光学树脂的制备与性能研究 总被引:8,自引:0,他引:8
通过2,2-二巯基乙硫醚(MES)与环氧氯丙烷反应合成了2,2-二巯基二乙硫醚二缩水甘油醚型环氧树脂(DGEMES),通过FTIR和MS对其进行表征;用乙二胺作为固化剂,将DGEMES与双酚A型环氧树脂(DGEBA)复合固化,得到了新型高折射率和低色散的光学树脂.DGEMES是一种较好的共聚单体,可以同时提高共聚树脂的折射率和阿贝数;DGEBA/DGEMES/乙二胺共固化树脂的nd=1.59~1.62,νd=35~39;当DGEMES的质量分数为40%时,固化树脂的折射率达到1.60以上,冲击强度22.5kJ/m2,且其它性能较均衡.此外,以甲基六氢苯酐(B-650)为固化剂,还合成了具有中等折射率的DGEBA/DGEMES/B-650共固化树脂(nd=1.54~1.56,νd=38~40),并对其光学和机械性能进行了研究. 相似文献
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Two novel cationic mono‐s‐chloro triazinyl (MCT) reactive dyes together with their analogues were synthesized via reacting an N,N‐dimethyl dodecylamine with p‐nitrobenzyl bromide. The resultant was reduced using stannous chloride and hydrochloric acid to produce the primary amine. The quaternary ammonium salt containing primary amine was then diazotized and coupled to H‐acid/J‐acid reacted with cyanuric chloride and sulfanilic acid. The analogue dyes were prepared via the same route without quaternary ammonium salt making stage. The dyes were characterized using FTIR, 1H NMR, UV‐Vis spectroscopy and elemental analysis. The substantivity, exhaustion and fixation of the dyes were investigated on cotton fabric. It was found that these functional dyes could be effectively introduced to cotton for achieving simultaneous coloration and functional finishing effects. All the dyed fabrics exhibited softening efficacy. The washing and light fastness of the dyed samples were further studied. 相似文献
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聚吡咯碳糊电极的研制及应用 总被引:6,自引:0,他引:6
研制了聚吡咯电极,探讨了该电极的性能和实用性,实验结果表明,该电极可用于伏安法快速测定L-抗坏血酸,在0.1mol/LKNO3底液中,线性范围为1.0×10^-11~9.0×10^-9mol/L检测限为5.0×10^-12mol/L,电极具有具有良好的重现性和高选择性,响应迅速,使用寿命3个月以上。 相似文献