scholarly journals Synergetic Effect of Cationic Starch (Ether/Ester) and Pluronics for Improving Inkjet Printing Quality of Office Papers

2021 ◽  
Author(s):  
Mohit Sharma ◽  
Roberto Aguado ◽  
Dina Murtinho ◽  
Artur J. M. Valente ◽  
Paulo J. T. Ferreira
Keyword(s):  
Synergetic Effect ◽  
Degree Of Substitution ◽  
Supramolecular Interactions ◽  
Cationic Starch ◽  
Coated Papers ◽  
Printing Quality ◽  
Fast Development ◽  
Optical Brightening Agents ◽  
The Individual ◽  
Ether Ester

Abstract Improving the printability of paper is still a relevant challenge, despite the fast development of digital communications. While it is well-known that cationic starches enhance ink density, their commercial paper-grade forms are limited to ethers with low degree of substitution. This work addresses the underexplored potential of highly substituted cationic starch for paper coating and its combination with tri-block polymers, namely Pluronics (P123 and F127), taking advantage of their supramolecular interactions with amylose chains. For that purpose, cationic starch ether and ester (starch betainate), both with a degree of substitution of 0.3, were synthesized by alkaline etherification and by transesterification, respectively. Paper without any surface treatment was subjected to one-side bar coating with suspensions encompassing those products and Pluronics, besides other common components. Black, cyan, yellow and magenta inks were printed on all coated papers through an inkjet printer. Key properties of printing quality such as the gamut area, gamut volume, optical density, print-through, inter-color bleed and circularity were measured in a controlled temperature-humidity environment. For instance, a formulation with cationic starch (ether/ester) and P123 improved the gamut area by 16–18% in comparison to native starch-coated paper sheets. Interestingly, the individual assessment of each component showed that cationic starch ether, starch betainate and P123 only improved the gamut area by 5.6%, 8.9% and 6.8%, respectively. Finally, but not less importantly, starch betainate was found to quench optical brightening agents to a lesser extent than cationic starch ethers.

scholarly journals Synergetic effect of cationic starch (ether/ester) and Pluronics for improving inkjet printing quality of office papers

Cellulose ◽  
2021 ◽  
Vol 28 (16) ◽  
pp. 10609-10624
Author(s):  
Mohit Sharma ◽  
Roberto Aguado ◽  
Dina Murtinho ◽  
Artur J. M. Valente ◽  
Paulo J. T. Ferreira
Keyword(s):  
Inkjet Printing ◽  
Synergetic Effect ◽  
Cationic Starch ◽  
Printing Quality ◽  
Ether Ester

scholarly journals The Language of Emoji in Social Media

2019 ◽  
Author(s):  
Burhanuddin Arafah ◽  
Muhammad Hasyim
Keyword(s):  
Social Media ◽  
Research Result ◽  
Social Institution ◽  
Visual Language ◽  
Verbal Language ◽  
Internet Users ◽  
The Social ◽  
Result Show ◽  
Fast Development ◽  
The Individual

The very fast development of information technology which is characterized by an influx of industry 4.0 has changed the way of human and behavior in language. The grammar which is a phenomenon of interest to language is examined along with behavior change language in the internet world. A phenomenon in language online is the emergence of the use of visual language emoji in conducting conversations in social media. This paper aims to discuss the phenomenon of visual language emoji among internet users in social media (WhatsApp). The aspects that will be emphasized are language (grammar) of emoji. Research methods carried out is observation and descriptive. Method of data collection is the division of the questionnaire online, and communications in WA screenshot that uses emoji icons. The research result show that emoji is a language (grammar) used in communicating in social media. Emoji language has dominated the conversation or message written on the social media and emoji (WA) as a language (syntax, semantics, and pragmatics) is part of the sentence, punctuation, expression, expressing feelings and thoughts to the opponent talk. The language of emoji expression indicates that the emoji can represent the thoughts and feelings instead of using verbal language. Thus, emoji is composed of two directions, i.e. language and parole. The language of emoji is the social institution of emoji (grammar) in social media, and the individual is the parole act, an actualized manifestation of the function of the emoticons language in syntactic, semantic and pragmatic.

Information Quantitative Analysis on Psychological Research

2014 ◽  
Vol 610 ◽  
pp. 680-685
Author(s):  
Cong Jing Ren ◽  
Yang Liu
Keyword(s):  
Quantitative Analysis ◽  
Power Analysis ◽  
Statistical Power ◽  
Information Science ◽  
Psychological Research ◽  
Statistical Manual ◽  
Diagnostic And Statistical Manual ◽  
New Methods ◽  
Fast Development ◽  
The Individual

With the fast development of the theories and techniques in information science in recent years, a variety of new methods have been used to help scholars in other fields manage the corresponding knowledge. This paper applied the research methods of information science to psychology to analyze the literature in psychology cited by ISI Web of Knowledge, then got a better understanding of psychology science. In order to understand the dynamics of psychology science, we conducted a quantitative analysis based on 8137 articles cited by SCI or SSCI, and used CiteSpace II to visualize the trends and patterns in the scientific literatures. In the end, the authors drew the following conclusions: (1) among all the individual authors, Cohen J and Seligman MEP share the highest citation times; (2) publications like Positive Psychology - An Introduction, Diagnostic and Statistical Manual of Mental Disorders (DSM), Statistical Power Analysis for the Behavioral Sciences have ranked first in the cited papers; (3) community psychology, clinical psychology, behavior, personality, model, self-are the hot areas and the frontier fields in psychology research.

Research on Application of High Degree of Substitution Cationic Starch in Paper Coating

2011 ◽  
Vol 287-290 ◽  
pp. 2074-2077
Author(s):  
Quan Xiao Liu ◽  
Jin Li Li ◽  
Wen Cai Xu ◽  
Yu Bin Lv
Keyword(s):  
Degree Of Substitution ◽  
Cationic Starch ◽  
Paper Coating ◽  
Coated Paper ◽  
Paper Properties ◽  
Color Density ◽  
Image Density ◽  
Research On Application ◽  
High Degree ◽  
Better Than

Different degrees of high degree of substitution cationic starch (HCS) were prepared and applied in paper coating. Effects of HCS on coating properties and coated paper properties were investigated, and the comparison of effects of HCS and PDMDAAC was made. The results show that the best amount of HCS in coating formula is between 2% and 4%. When the amount of HCS is 4%, whiteness of coated paper was the highest. The color density was the highest when the amount of HCS is about 4% and the degree of substitution is 0.64. HCS with degree of substitution 0.849 is better than PDMDAAC in some respects, and the print image density achieved satisfactorily.

Research and Application of Retention Agent in Reversible Thermochromism Materials Papermaking

2015 ◽  
Vol 731 ◽  
pp. 452-456
Author(s):  
Xiao Xiu Hao ◽  
Na Wei ◽  
Cheng Sun ◽  
Shu Hui Yang
Keyword(s):  
Retention Rate ◽  
Degree Of Substitution ◽  
Experimental Results ◽  
Pulp Fiber ◽  
Modified Starch ◽  
Cationic Starch ◽  
Optimum Dosage ◽  
Reversible Thermochromism ◽  
High Degree

This paper discusses the effects of different retention agent such as: CPAM, APAM, PAE+CPAM, cationic starch with high degree of substitution and modified starch on the reversible thermochromism materials in anti-counterfeiting paper retention rate, and then determined the optimum dosage of retention agent in the slurry. According to the anti-counterfeit paper color value, the mechanism of reversible thermochromism paper was studied. The experimental results show that when the slurry with retention agent, the reversible thermochromism materials in the anti-counterfeit paper retention increased significantly. This suggests that retention agent in pulp fiber has played the role of bridge and link, thus ensuring the security of reversible thermochromism paper.

scholarly journals The influence of the blanket's compressibility for sheet offset printing quality on coated papers.

1988 ◽  
Vol 42 (1) ◽  
pp. 95-100
Author(s):  
Yasuo Yasueda ◽  
Eiichi Shekine ◽  
Shohei Sato ◽  
Khoichi Otake
Keyword(s):  
Offset Printing ◽  
Coated Papers ◽  
Printing Quality

scholarly journals Investigation of the effect of para-amino benzoic acid (PABA) added starch-coated chemicals on the printability properties of paper

2019 ◽  
Vol 17 (1) ◽  
pp. 228080001881601 ◽  
Author(s):  
Arif Ozcan
Keyword(s):  
Benzoic Acid ◽  
Surface Coating ◽  
Uv Light ◽  
Blocking Agent ◽  
Light Fastness ◽  
Cationic Starch ◽  
Coated Papers ◽  
Before And After ◽  
Coating Formulation ◽  
Amino Benzoic Acid

Introduction: Paper is the most important material of the printing industry and is being improved due to the increasing needs of industry. The most important process to improve the optical and physical properties of paper is the surface coating. Paper has a smoother and opaquer surface with surface coating. In addition, brightness, whiteness, and yellowness values   are improved with surface coating. Ultraviolet (UV) light in sunlight causes changes in the structure of the paper and coating chemicals and accordingly causes yellowing. Para-amino benzoic acid (PABA), due to its chemical structure, is a UV-blocking agent used in sunscreen creams. Methods: The effect of PABA on paper gloss, yellowness, and lightfastness values   was investigated by adding it into the surface coating formulation. For this purpose, coating formulations were prepared with cationic starch and 3%, 5%, and 7% PABA; coatings were applied to the paper according to laboratory condition standards. Coated papers were printed with an IGT-C1 lab-type offset printability device with magenta ink. The printed papers were then exposed to a light fastness test with Solarbox. The color, brightness, and yellowness values   of all samples before and after lightfastness were measured with an X-Rite spectrophotometer. The gloss of coated and printed paper sample values was measured with a BYK-Gardner glossmeter. Results: The gloss values   of paper to which PABA was added, increased; however, it was determined that these gloss values   decreased after the lightfastness test. Conclusions: PABA-added cationic starch coatings are more affected by UV light than cationic starch coatings.

Preparation and Characterization of High-Substituted Cationic Starches in Aqueous Solutions

2012 ◽  
Vol 268-270 ◽  
pp. 555-558 ◽  
Author(s):  
Xiu Li Wu ◽  
Ya Cui Guo ◽  
Pi Xin Wang
Keyword(s):  
Crystal Structure ◽  
Degree Of Substitution ◽  
Molar Ratio ◽  
Amino Group ◽  
Trimethylammonium Chloride ◽  
Cationic Starch ◽  
Alkaline Catalyst ◽  
Disordered Structure ◽  
High Degree

In the presence of alkaline catalyst NaOH,the cationic corn starches bearing quaternary amino group with high degree of substitution are prepared by the reaction of the starch with 2, 3- epoxy propyl trimethylammonium chloride (ETA) in aqueous solutions.Under the conditions of molar ratio anhydroglucose/ETA/alkali =1: 4.0: 0.2025, reaction temperature 60°C and reaction time 6h, degree of substitution of the product is 1.0959. Structure of the product is characterized by FTIR and 13C NMR spectroscopy.X-ray diffraction indicates that the crystal structure of the native starch is destroyed and disordered structure of cationic starch is formed.

scholarly journals Molecular Interactions in Binary Surfactant Solutions: Effect of Ionic Counterpart

2020 ◽  
Vol 64 (3) ◽  
Author(s):  
Olga Kochkodan ◽  
Nataliya Slobodianiuk ◽  
Lidiya Kovshun ◽  
Olena Hyzhan
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Molar Fraction ◽  
Sodium Dodecyl ◽  
Synergetic Effect ◽  
Micelle Formation ◽  
Surfactant Mixtures ◽  
Triton X100 ◽  
Dodecyl Sulfate ◽  
The Individual ◽  
Adsorption Layers

Abstract. The effect of intermolecular interactions on processes of micelle formation and adsorption in binary mixtures of non-ionic Triton X100 (TX100) with ionic sodium dodecyl sulfate and dodecylpyridinium bromide surfactants was studied. The ionic surfactants have identical hydrophobic alkyl chain and different hydrophilic groups. A feature of the used binary surfactant mixtures is that critical micelle concentrations and surface activity of the individual components are considerably different. A synergetic effect of decreasing of the surface tension was found in the surfactant mixtures. It was shown that the mixed adsorption layers and the micellar phases are enriched with the nonionic surfactant. For both sodium dodecyl sulfate/TX100 and dodecylpyridinium bromide/TX100 systems, the synergetic effects were most pronounced at a high molar fraction of the nonionic surfactants in the mixture. By using the Ruben-Rosen model, molecular interaction parameters in the mixed micelles βm, and in the adsorption layers βσ were evaluated. As was shown βm and βσ parameters to be notably higher for sodium dodecyl sulfate/TX100 mixture. Resumen. Se estudia el efecto de las interacciones intermoleculares en el proceso de formación y adsorción de micelas en mezclas binarias de Triton X100 (TX100), no iónico, con dodecil sufato de sodio y bromuro de dodecil piridinio, ambos iónicos, como surfactantes. Los surfactantes iónicos tienen cadenas alquílicas hidrofóbicas idénticas y grupos hidrofílicos diferentes. Una característica de las mezclas binarias de surfactantes que se utilizaron es que las concentraciones micelares críticas y la actividad superficial de los componentes individuales es considerablemente diferente. Se encontró un efecto sinérgico de decremento de la tensión superficial en las mezclas de surfactantes. Se muestra que las capas mixtas de adsorción y las fases micelares están enriquecidas con surfactante no iónico. Tanto en el sistema dodecil sufato de sodio/TX100 como en el caso de bromuro de dodecil piridinio/TX100, los efectos sinérgicos fueron más pronunciados en las mezclas con fracciones molares altas de los surfactantes no iónicos. Utilizando el modelo de Ruben-Rosen, se evaluaron los parámetros de interacción molecular en las micelas mezcladas βm y en las capas de adsorción βσ. Se muestra que los parámteros βm son βσ son notablemente mayores en la mezcla de dodecil sufato de sodio/TX100.

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