Reactive inkjet printing of polyethylene glycol and isocyanate based inks to create porous polyurethane structures

Reactive inkjet printing offers a direct way to create polymeric structures in situ on a substrate. Therefore, two component polyurethane formulations can be utilized to be used in multicomponent inkjet printing. In this contribution, the use of polyethylene glycol (M = 200 g mol⁻¹), glycerol ethoxylate (M = 1,000 g mol⁻¹), and water (blowing agent) in combination with aliphatic 1,6-hexamethylene diisocyanate or aromatic methylene diphenyl diisocyanate for reactive inkjet printing is evaluated. The inks are jettable on a Dimatix DMP-3000 inkjet printer using a 10 pL piezo driven drop-on-demand printhead showing stable droplet formation. Solid films on glass are formed using a drop-by-drop printing strategy. Layer-by-Layer strategy gives best results on polycarbonate substrates forming porous polyurethane structures. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 46977.     

水性聚氨酯印花粘合剂应用工艺研究

以聚乙二醇（PEG）、异佛尔酮二异氰酸酯（IPDI）为原料,二羟甲基丙酸（DMPA）为亲水扩链剂,乙二胺为非亲水扩链剂,三乙胺（TEA）为中和剂,采用预聚体分散法合成水性聚氨酯涂料印花粘合剂。通过单因素分析法测试涂料印花织物牢度指标等性能,确定了最佳整理工艺为：焙烘温度为150℃,焙烘时间为3min,粘合剂用量25g,涂料用量Rg．交联剂用量0.8g,增稠剂用量2~4g。     

环氧改性水性聚氨酯涂料印花粘合剂的研制

用环氧树脂改性水性聚氨酯(WPU)乳液来提高胶膜的耐水性、耐溶剂性、耐化学品性以及力学性能。讨论了环氧树脂的加入量和加入方式对乳液性能的影响。确定了水性聚氨酯乳液的制备工艺条件:nNCO/nOH=2:1,预聚温度65～70℃,反应2h;使用3.71%～4.63%的DMPA进行亲水改性,且DMPA要用N-甲基-2-吡咯烷酮溶解后加入;扩链时间2h;乳化温度<5℃。得到了共聚法制得的环氧树脂改性WPU性能较优、且环氧树脂加入量6%为宜的结论。     

封端型水性聚氨酯抗起毛起球整理剂的合成及应用

采用NaHSO3封端异佛尔酮异氰酸酯和聚多元醇反应的聚氨酯预聚体,合成了封端型水性聚氨酯（WBP U）;讨论了WBPU对织物整理后起毛起球性的影响,并优化了织物整理工艺。     

环保型封端水性聚氨酯的合成

以聚醚多元醇和2,4-甲苯二异氰酸酯（TDI）为基本原料,以异丙醇为稀释剂、亚硫酸氢钠为封端剂,用预聚体—封端混合法,合成了封端型水性聚氨酯。通过讨论异氰酸酯指数R值、预聚温度、预聚时间、封端剂用量、封端温度和封端时间等因素对封端型水性聚氨酯性能的影响,确定R值2.0,预聚反应温度和时间（63℃,2h）,封端的温度和时间（0～5℃,30min）以及封端剂的用量(n_NaHSO3)/n_NCO=2.75)为最佳工艺。     

抗起毛起球整理用热反应型WPU的合成及应用

以异佛尔酮二异氰酸酯（IPDI）、聚多元醇为主要原料,以异丙醇为溶剂,合成了反应型水性聚氨酯整理剂,既保持了聚氨酯的弹性,又具有极好的反应活性,可以赋予织物各种功能,提高纺织品的附加价值。介绍了该类整理剂在纯棉针织物抗起毛起球整理中的应用。     

有机硅改性封端型水性聚氨酯的合成

通过在封端型水性聚氨酯中引入有机硅单体（A-110）,合成了有机硅水性聚氨酯（WBPSU）;讨论了羟基聚醚类型、有机硅含量、改性温度和时间等因素对分散体耐水性和成膜性的影响,并将其应用于棉织物的防皱整理,评定了整理效果。     

反应喷墨打印技术及其在功能材料领域的研究进展

反应喷墨打印技术作为喷墨打印电子技术的重要分支,因其可以在沉积材料的同时可得到器件而受到人们的广泛关注.本文详细阐述了反应喷墨打印技术在功能材料制备领域,特别是在金属材料、高分子材料、无机材料等方面的研究进展,说明了反应喷墨打印用墨水是未来喷墨印刷电子研究的关键技术之一,简要介绍了反应喷墨打印技术与三维打印的联系,指出其在金属电路、有机发光二极管等印刷电子产业领域有广阔的应用前景.     

水性聚氨酯的改性及水性聚氨酯涂料

介绍了几种水性聚氨酯的改性技术,并对水性聚氨酯涂料的配制及其应用作了相关概述。     

封闭型水性聚氨酯的固色应用

采用封闭型水性聚氨酯对棉织物进行固色研究,探讨了水性聚氨酯的用量、催化剂的使用以及固色工艺对固色效果的影响。结果显示,当水性聚氨酯的用量为40~60 g/L,催化剂二月桂酸二丁基锡(T-12)为水性聚氨酯用量的0.7%时,固色后棉织物的湿摩擦牢度可达到4级,且汽蒸工艺有助于湿摩擦牢度的提高。用红外光谱差谱技术研究了固色机理,结果表明,水性聚氨酯因其成膜性以及覆盖染料的作用而提高色牢度,尤其是湿摩擦牢度。     

Preparation and microcosmic structural analysis of recording coating on inkjet printing media

Preparation of recording coating on inkjet printing (RC-IJP) media was proposed. The microstructure and roughness of RC-IJP was analyzed by scanning electron microscopy (SEM) and atomic force microscope (AFM). The surface infiltration process of RC-IJP was studied by a liquid infiltration instrument. The distribution of C, O and Si composites on recording coating surface is analyzed by energy dispersive spectrum (EDS). The transmission electron microscopy (TEM) analysis showed that the nanoscale silica could be dissolved uniformly in water. Finally, the print color is shown clearly by the preparative recording coating.     

有机硅偶联剂改性水性聚氨酯的合成

采用预聚体——封端混合法,用2,4-甲苯二异氰酸酯（TDI）与聚醚多元醇（PEG-1000）进行预聚反应,同时用有机硅偶联剂（A-110）对聚氨酯改性。探讨改性工艺条件对水性聚氨酯性能的影响。     

交联型水性聚氨酯的合成与研究

采用聚醚多元醇、异佛尔酮二异氰酸酯IPDI、2,2-二羟甲基丙酸(DMPA)、三乙胺为主要原料,采用自乳化法合成一系列的水性聚氨酯乳液。考查了预聚温度和预聚时间、扩链时间和扩链温度对反应的影响;R值(n/n)、DMPA的用量和中和度对乳液性能的影响。结果显示,当预聚温度为60℃、预聚时间为60 min、扩-NCO-OH链温度为75℃、扩链时间为120 min时,可以保证反应的速率和生产周期;选择R=2、DMPA用量为3%、中和度为100%,可以制得稳定的、性能优异的水性聚氨酯乳液,可用于织物的防水透湿整理。()     

聚氨酯乳液的改性及其应用研究

用丙酮法合成了固含量为35%的聚氨酯成膜乳液。主要考查了复合型软段对聚氨酯成膜乳液及其胶膜性能的影响,并考查了乳液在水性印刷油墨中的应用。结果表明,亲水基团-COOH质量分数达到1.5%,能保证乳液的力学稳定性;随着不同聚多元醇复配比例的变化,乳液的稳定性和黏度、聚氨酯胶膜的力学性能以及吸水性均呈规律性变化,所制备的水性聚氨酯油墨对PET薄膜的附着力好。     

Synthesis of waterborne polyurethane ink binder with high T-peel strength and its application in biaxially oriented polypropylene film printing

In order to improve adhesion properties of waterborne polyurethane (WPU) inks on biaxially oriented polypropylene (BOPP) films, herein, a liquid polyester polyol BY3003 with long-branched aliphatic chains was used to prepare WPU latexes suitable for BOPP films printing. The application of BY3003 made the surface tension of the prepared latexes not more than 43 mN/m, while that of traditional WPU latex exceeded 55 mN/m. Accordingly, the T-peel strength of the inks made from these latexes was all above 0.8 N/15 mm. In addition, post chain extension degree, dimethylol butyric acid content, and NCO/OH molar ratio also had significantly effect on latex and film properties of WPU, especially on the T-peel strength of the corresponding inks. By optimizing these factors, a WPU latex with surface tension as low as 39.6 mN/m and adhesion fastness over 95% on BOPP film were obtained, and the T-peel strength of its corresponding ink was up to 2.05 N/15 mm, which is the highest value recorded in the literature as far as we know.     

耐湿热复合油墨用聚氨酯粘合剂的研究进展

简述了提高聚氨酯树脂耐湿热的原理和方法。从低聚物二元醇、二异氰酸酯和扩链剂等合成原料的选择,具有特定功能的其它化合物的共聚或共混改性,以及固化剂的使用等方面,综述了用于食品包装的耐湿热复合油墨用聚氨酯粘合剂的国内外研究进展。指出复合油墨用聚氨酯粘合剂正向着环保化、通用化方向发展,单组分耐125℃以上高温蒸煮复合油墨用聚氨酯粘合剂将成为未来的研究趋势。     

Digital printing of acrylic fabric with cationic dyes using conventional inkjet printer

A special printing ink formulation based on cationic dyes is developed for digital printing of acrylic fabrics using a conventional inkjet printer. In order to investigate the contribution of color gamut boundary of printer colorants to printing efficiency, customized color targets containing 3164 color patches in 25 different hues were generated. The printed color patches were then fixed through steaming for 30 minutes followed by washing with hot soap and water and finally drying. To show the influence of dye fixation on colorimetric changes as well as color gamut boundary of samples, the L*a*b* values of color patches before and after fixation process were compared. Results demonstrate that color saturation of samples is enhanced dramatically after the dye fixation process. In fact, 3D color gamut of color patches has been drastically expanded as a direct consequence of adsorption to absorption transition. Additionally, dye fixation changes the structure of printed image from halftone superimposed dots to contone superimposed dyes. Strictly speaking, during fixation process, colors inside the halftone dots diffuse through the interfacial area to make the individual printed dots integrated. This is in analogy to the chromogenic photography films and dye‐sublimation thermal transfer processes by which contone images are produced. Moreover, dye fixation improves the washing fastness of digitally printed acrylic fabrics to the level comparable with the traditional screen printing method. © 2016 Wiley Periodicals, Inc. Col Res Appl, 42, 244–249, 2017     

卡基材料用水性聚氨酯覆膜胶的合成及应用

以异佛尔酮二异氰酸酯(IPDI)、聚己二酸丁二醇酯(PBA)、聚氧化丙烯二醇(PPG)、聚四氢呋喃二醇(PTMG)、二羟甲基丁酸(DMBA)和甲基丙烯酸-β-羟乙酯(HEMA)等为主要原料,合成了卡基材料用阴离子型WPU(水性聚氨酯)覆膜胶。研究结果表明:采用单因素试验法优选出制备WPU覆膜胶的最优配方是初始R=n(-NCO)/n(-OH)=4、m(PPG):m(PTMG):m(PBA)=10:20:70、w(DMBA)=5.5%和w(HEMA)=4.5%(相对于预聚体用原料总质量而言),此时活泼的-NCO基已被封闭,羟基丙烯酸酯已成功引入到WPU大分子链中;与普通WPU覆膜胶相比,由最优配方制成的WPU覆膜胶的固含量(41%)较高、剥离强度较大且稳定性较佳,将其应用于卡基材料中,可得到高剥离强度和高耐湿热老化性能的覆膜色卡。     

耐水性水性聚氨酯合成工艺研究

选用聚醚多元醇与聚酯多元醇进行复配,制得耐水性较好的WPU。以DMBA作为亲水扩链剂,探讨了DMBA加入方式以及聚氨酯自乳化方法对水性聚氨酯外观、稳定性、成膜性能的影响。     

3D打印炭黑/水性聚氨酯导电复合材料的制备及性能

采用硅烷偶联剂KH550对炭黑（CB）进行共价键功能化改性,并通过FTIR、DLS和SEM对改性前后的炭黑进行考察。结果表明经过KH550改性得到的炭黑,粒径约为620nm,且分散均匀。通过溶液共混法和流延浇铸法制备了CB/WPU与KH550/CB/WPU导电复合材料。研究对比发现,由于KH550/CB在WPU基体中分散性更好,使导电粒子之间接触更加紧密。当添加量为3%时,其电导率为1.79×10-3 S/m,较CB/WPU复合材料增加了10倍;力学测试显示含量为2%时,其拉伸强度较CB/WPU复合材料增加了175%。并在此基础上利用直写式3D打印,探讨不同的填充图案和填充率对KH550/CB/WPU复合材料导电性能的影响。结果显示选择线型填充、填充率为80%时,导电性能较好,其电导率达到2.66×10-3 S/m。