单体对UV-LED固化光油性能的影响

目的研究单体对UV-LED固化光油性能的影响,并为正确选择单体配制印刷适性良好的UV-LED固化光油提供理论依据。方法主要通过控制预聚物、光引发剂和助剂的种类和比例不变,加入相同数量的不同种类的单体,分别制备光油样品,测试光油的粘度、表面张力和固化速度以及光油固化膜的附着力和柔韧性。结果不同单体对UV-LED固化光油的性能有不同的影响,采用复配单体,TMPTA和HDDA的质量比为3∶7时,UV-LED固化光油综合性能优异,符合市场上对光油的要求。结论单体对UV-LED固化光油的粘度和固化速度影响较大,对光油固化膜的附着力和柔韧性也有很大的影响。     

UV-LED磁性油墨固化时间影响因素研究

目的应用UV-LED固化技术来降低磁性防伪油墨的固化时间。方法选用环氧丙烯酸酯和二丙二醇二丙烯酸酯,通过改变两者的质量比来配制连接料,选用TPO和819为光引发剂,改变光引发剂的质量分数,固定其他组分,配制UV-LED磁性防伪油墨,打样并使用波长为395 nm的UV-LED光源照射,测定油墨的固化时间。结果数据结果表明,当连接料中环氧丙烯酸酯和二丙二醇二丙烯酸酯的质量比为1∶0.8,光引发剂选用819(质量分数为6%)时,磁性防伪油墨固化时间最快可达0.6 s,双键转化率最高可达96%。结论 UV-LED磁性防伪油墨固化时间的主要影响因素有预聚物与单体的质量比,光引发剂的种类与质量分数。在合理的粘度范围内,预聚物与单体的质量比值越大,固化时间越短;单一光引发剂所释放的自由基越多,固化速率越高,光引发剂质量分数越高,固化时间越短。     

单体对UV喷墨油墨体系固化速度的影响

不同官能团的单体对油墨的黏度和固化速度影响不同。设计了由单、双、三官能团单体EOEOEA、TPGDA和TMPTA组成的混合单体体系,采用正交试验方法设计改变混合单体比例的配方,测试了由混合单体体系组成的UV喷墨油墨的黏度和固化率。实验结果表明混合单体的最优比例为5.5∶2∶1.5。     

UV-LED喷墨油墨用单体和光引发剂性能的评估

目的 为了建立评估方法,优选出适用于UV-LED固化喷墨油墨的光引发剂和低粘度单体种类。方法 用紫外-可见光分光光度计表征TPO, ITX, DETX, 819, 784, TPO-L等常见的6种光引发剂的紫外-可见吸收光谱。采用TPO为引发剂,分别用HDDA, ACMO, DPGDA, EOEOEA, DMAA等5种常用的低粘度单体,配制UV-LED喷墨油墨用连接料和油墨,用红外光谱和可见光透过光谱表征连接料的固化速度和固化膜的颜色,并通过指压法判定表干程度。结果 DMAA, EOEOEA组成的喷墨油墨连接料成膜性不好;含有ACMO连接料的透明度较好。结论 满足食品、药品包装安全要求,可以用于UV-LED固化的光引发剂为TPO, TPO-L及819;以粘度和固化程度为标准,用于制作喷墨油墨的5种单体的适用性从高到低排序为DPGDA, HDDA, ACMO, EOEOEA, DMAA。建立的评估方法合理有效。     

水基丝印油墨性能及印刷适性研究

目的研究分析不同配方和比例原材料对水基丝印油墨性能和印刷适性的影响。方法分别以聚氨酯乳液、丙烯酸树脂乳液、水性色浆为主剂,增稠剂、干燥剂、消泡剂等为辅助剂配置水性油墨;利用平行板粘度计、旋转粘度计等检测油墨的粘度、软硬程度、流动值、拉丝性能、耐抗性等相关性能。结果随着丙烯酸树脂乳液相对于水性色浆比例的增大,粘度逐渐增加,丝头越短,油墨越硬,光泽度提高;随着聚氨酯乳液相对于水性色浆比例的增大,粘度逐渐减小,丝头越长,油墨先变软后变硬,光泽度降低;随着增稠剂加入量的增大,油墨粘度增大;随着催干剂的加入,油墨干燥时间缩短。结论丙酸烯树脂乳液与水性色浆的质量比为5∶1时为较优配方;聚氨酯树脂乳液与水性色浆的质量比为3∶1时为较优配方。     

UV 丝网印刷油墨制备及性能研究

通过设计不同配方,制备了UV丝网印刷油墨,研究了预聚物、光引发剂、活性稀释剂、颜料的种类和含量对UV绿色油墨的固化时间、附着力、柔韧性和耐溶剂性能的影响。研究结果表明:聚酯丙烯酸酯和聚氨酯丙烯酸酯组成的复合预聚物体系,使UV油墨具有优良的性能;当预聚物复合体系质量分数为51%,其中聚酯丙烯酸酯和聚氨酯丙烯酸酯的质量比为4∶1,Darocur1173质量分数为7%,绿色颜料为4%,活性稀释剂HD-DA为33%时,UV油墨的综合性能最佳。     

UV喷墨油墨分散性评价方法的研究

设计了4种具有不同颜基比的UV喷墨油墨配方并制备了色浆样品,用3种方法对颜料粒子的分散状态进行了评价.研究结果表明,激光粒度仪测试法与显微镜图片观测法的评价结果一致,颜基比2∶1的色浆样品具有良好的分散性;紫外可见吸收光谱法的测试结果能够反映一定的趋势.     

光引发剂对UV喷墨油墨固化过程流变行为的影响

UV喷墨油墨由颜料、预聚物、活性单体、光引发剂及各种助剂组成,光引发剂是影响UV喷墨油墨固化的关键因素之一。为了研究光引发剂对油墨固化需要的能量及固化速度的影响,使用TPO、907、ITX3种引发剂,运用配方设计原理制备了7种青色油墨,用紫外光照射使油墨固化,测试油墨样品在受到紫外光照射时发生固化反应过程中的流变学行为,通过测试油墨样品的动态弹性率G’、损耗弹性率G”等流变学参数随固化程度而变化的规律,探讨用流变学参数评价UV喷墨油墨固化速度的方法。研究结果表明：含有907和ITX的引发剂体系出现凝胶的时间短,固化快,对实验所制备油墨的引发效果最佳。     

预聚物对UV柔印油墨分散性影响的研究

为了获得具有良好分散性的UV柔印油墨,在颜料含量不变的前提下,采用不同种类的预聚物及颜基比,制备UV柔印油墨色浆,通过测试色浆的粒径分布,从而分析预聚物对UV柔印油墨分散性的影响.研究结果表明,预聚物的种类以及颜基比对于油墨分散性有着较大的影响,预聚物6311-100具有良好的颜料分散性,其最佳颜基比为1.5∶1.     

UV-LED固化技术在印铁行业中的应用及前景

本文比较了UV-LED固化技术与UV固化技术的区别及利弊,比较了UV-LED油墨与UV油墨配套的固化设备性能的优劣,探讨了UV-LED技术在国内推广的基础条件及发展前景。     

Inkjet printing of conductive patterns with an aqueous solution of [AgO2C(CH2OCH2)3H] without any additional stabilizing ligands

The use of silver(I)-2-[2-(2-methoxyethoxy)ethoxy]acetate, [AgO₂C(CH₂OCH₂)₃H], and its application as an aqueous metal-organic decomposition (MOD) inkjet ink is reported. The chemical and physical properties of the silver carboxylate and the ink formulated thereof are discussed. The ink meets all requirements of piezo driven inkjet printing. The printed features were converted into electrically conducting silver patterns by thermal or photo-thermal treatment. The conversion of [AgO₂C(CH₂OCH₂)₃H] to elemental silver follows a two-step decomposition as demonstrated by thermogravimetry-mass spectrometry (TG-MS) measurements. The measured conductivities of the printed features on glass and polyethylene-terephthalate (PET) are 2.7 × 10⁷ S m⁻¹ and 1.1 × 10⁷ S m⁻¹, respectively, which correspond to 43% (glass) and 18% (PET) of the bulk silver conductivity.     

对喷墨印刷品光泽度的研究

分别研究了油墨的表面张力,着色剂的颗粒度,油墨的分散性,溶剂的渗透速度和印刷介质的平滑度及吸墨性等材料参数对印刷品光泽度的影响.采用喷墨印刷品动态光泽度的分析方法,得到了影响几种典型的喷墨印刷品光泽度的最主要因素.     

Synthesis of silver nano particles and fabrication of aqueous Ag inks for inkjet printing

The main problem in preparing stable and printable inks containing nanoparticles for inkjet printing is to overcome the strong agglomeration of the particles in dispersion medium. In this study, the silver particles with diameter around 50 nm were produced by a simple wet chemistry method. Stable aqueous printable inks were formulated by using the combination of a triblock copolymer and high intensity focused ultrasound (HIFU). Various factors that affect the ink stability, such as, copolymer content and time of HIFU treatment, were investigated. The ink containing 5 wt% silver has a viscosity of about 2 mPa s and surface tension 30 mN m⁻¹ at 25 °C, which meet inkjet printer requirements. Such inks have been successfully printed on Al₂O₃ ceramics and low-temperature co-fired ceramics (LTCC) and the printed films show low resistivity.     

水性 UV 油墨的制备及表征

目的为了确定水性UV油墨的制备、表征及其配方。方法采用高速分散法将连接料、颜料、去离子水和助剂分散均匀即可制得水性UV油墨,探讨了连接料的含量、光固化时间对水性UV油墨附着牢度的影响,以及光引发剂用量、墨膜厚度对墨膜光固化时间的影响。结果连接料的较佳质量分数为60%,墨膜的适宜固化时间为6 s,光引发剂的较佳用量为2%,墨膜的适合厚度为10μm。当m(连接料)∶m(颜料)∶m(乙醇和水)∶m(光引发剂)=6∶1∶2.8∶0.2时,水性UV油墨的综合性能较佳。结论该水性UV油墨具有干燥速度快、无污染、印刷质量高等优点,可广泛应用于包装印刷行业。     

Paper-Based Printed Antenna: Investigation of Process-Induced and Climatic-Induced Performance Variability

Printing technologies have emerged as a viable method for the fabrication of various electronic components, including sensors, actuators, energy harvesters, thin-film transistors and circuits, as well as antennas. However, printing processes have limitations in terms of surface roughness and thickness. Printing conductive structures on novel substrates, such as cellulose-based sustainable paper, also leads to further challenges linked to the high surface porosity and ink carrier absorption. Herein, the variability of paper-based printed antenna performance due to different printing processes, ink carrier absorption, and temperature is investigated. The resonance frequency and gain of different printed antennas (e.g., screen, inkjet, and dispense-printed) are compared in terms of surface roughness, thickness, and resonance frequency. Screen-printed antennas show better performance compared to other printed antennas. The results show that the resonance frequency of antenna shifts 20, 30, and 50 MHz for screen printed, dispense printed, and inkjet printed respectively, from the nominal 2.6 GHz. In the case of the inkjet-printed antenna, a clear effect of skin depth is observed, due to the 0.91 $\text{μm}$ thickness. Furthermore, it is demonstrated that the permittivity/dielectric constant of the paper substrate is significantly influenced by ink carrier absorption and temperature variance.     

环氧树脂/聚醚胺柔性导电油墨的制备与性能

以聚醚胺为固化剂、环氧树脂E-51为粘接树脂、银包铜粉为导电填料制备了环氧树脂/聚醚胺柔性导电油墨,用红外光谱和差示量热扫描分析对环氧树脂/聚醚胺D-400体系的固化条件进行了表征,讨论了导电油墨体积电阻率的影响因素;并研究了聚醚胺D-2000与D-400不同质量比对油墨的柔韧性、附着力、体积电阻率的影响。结果表明,环氧树脂/聚醚胺D-400导电油墨的体积电阻率随着固化剂D-400用量、导电填料含量、固化时间的增长均先减小后趋于稳定;当聚醚胺D-2000/D-400的质量比从0增加到0.6时,导电油墨的柔韧性提高了67.9%,对聚对苯二甲酸乙二醇酯(PET)基材的附着力等级仍为0级,体积电阻率增大了40.6%。     

紫外光固化墨水应用研究新进展

UV喷墨墨水中包含着预聚物、单体、光引发剂、颜料、助剂等组分,其中预聚物是构成UV喷墨墨水组分的基本骨架,其性能对固化过程和固化膜的性质起决定作用;单体作为活性稀释剂影响墨水体系的黏度和固化速度;光引发剂的作用是吸收紫外光能量,同时产生游离基,促使油墨发生聚合反应,是光固化体系的关键组分。介绍了常见UV喷墨墨水中预聚物、单体和光引发剂的组成、特性以及最新应用研究动向。     

Direct writing of semiconducting polythiophene and fullerene derivatives composite from bulk heterojunction solar cell by inkjet printing

The direct writing approach of poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM) composite from bulk-heterojunction (BHJ) solar cell was efficiently addressed by inkjet printing technology using conventional chlorobenzene ink solution. The structure of inkjet-printed P3TH:PCBM BHJ film was fabricated by the repetitive direct writing of new line overlapped partially on former line. The best structure of P3HT:PCBM film for BHJ solar cell was observed from inkjet printing condition of around 50% of droplet overlaps with 2 wt.% BHJ ink at 25 °C of substrate temperature. The maximum power conversion efficiency reached 2.83% with an open circuit voltage of 0.62 V, a short circuit current density of 8.60 mA/cm², and a fill factor of 0.53 under air mass 1.5 G irradiation (100 mW/cm²).