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

Bi̇rtane

Çi̇ği̇l

et al. 2019

Flavour & Fragrance J

Self Cite

The aim of this study is to produce a lavender oil capsules with triblock copolymer and to use these capsules for providing scented paper. Thus, polyethylene oxide‐polypropylene glycol‐polyethylene oxide (PEO‐b‐PPG‐b‐PEO) ABA‐type block copolymer was synthesized by means of Atom Transfer Radical Polymerization and the chemical structure of PEO‐b‐PPG‐b‐PEO was characterized by ATR‐FTIR and 1H‐NMR. Moreover, block ratio of the PEO‐b‐PPG‐b‐PEO was identified with 1H‐NMR. Lavender oil was encapsulated in the polymer by micellization of interactions between hydrophilic‐lipophilic‐hydrophilic polymer and oil. These interactions include lavender oil and lipophilic block interaction and oil‐hydrophilic group repulsion. In addition, hydrophilic groups interacted with water to keep the micelles suspended. The critical micelle concentration and size of the micelles were analysed with SEM. Decomposition of capsules was determined by UV spectroscopy with respect to pH change. Paper coating formulations were prepared with fragrant capsules and coated on paper with laboratory‐type coating machine. The colour and gloss of obtained papers were determined by spectrophotometer and glossmeter. As a result, PEO‐b‐PPG‐b‐PEO polymer can be used to encapsulate lavender oil, and the resulting capsules have functioned without degradation in the paper coating.

Section: Introductionmentioning

confidence: 99%

pH‐controlled lavender oil capsulation with ABA‐type block copolymer and usage in paper coating

Bi̇rtane

Çi̇ği̇l

et al. 2019

Flavour & Fragrance J

Self Cite

“…Paper and ink production and consumption rates have been increasing . Uncontrollable consumption increase arising from growing population, environmental factors, and new lifestyles have made it necessary to make some changes . Paper and ink production from renewable sources are one of the most popular topics in the sector.…”

Section: Introductionmentioning

confidence: 99%

“…2,3 Uncontrollable consumption increase arising from growing population, environmental factors, and new lifestyles have made it necessary to make some changes. 4 Paper and ink production from renewable sources are one of the most popular topics in the sector. Increasing recycling rates in the paper production, waste management, the industrial forest management, and innovation in production processes take the lead.…”

Section: Introductionmentioning

confidence: 99%

Natural ink production and printability studies for smart food packaging

Ozcan

Color Research & Application

2020

Self Cite

Versatile smart packages provide information on the freshness of the content and help protect the content from microorganisms. In this sense, in this study both natural antimicrobial properties and pH sensitive natural dyes were obtained from red beet. Inks were prepared and printed using this dye and their suitability for smart packaging was investigated. For this purpose, red beet was cut into small sizes and mixed separately in ethanol and water (1:2) at 200 rpm. The betaine dye was taken up in solvent. These solvents were removed with evaporator and precipitated with centrifugation and dried in a vacuum oven. The chemical structure of the obtained dye was illuminated by Attenuated Total Reflection‐Fourier Transform Infrared Spectroscopy (ATR‐FTIR). The color character was determined by UV spectroscopy. Pink colored natural ink was produced by using ink varnish with carboxymethyl cellulose polymer and solid dye. Screen printing was made with this ink and the color, gloss, and lightfastness characters of prints were examined. Antimicrobial effects of the obtained prints were measured against Staphylococcus aureus and Escherichia coli. Mordanting studies were performed with (KAl[SO4]2.12H2O) and change in color character was measured. The prints produced using the red beet extract have a yellow‐orange color in the basic state; in acid cases it was determined to have a pink‐purple color. In addition, it has been found that the ink prints obtained from red beet have antimicrobial properties against bacteria. Results prove that produced samples have good antimicrobial, pH indicator, and printability properties. This colorant can be used in smart food packaging.

“…Commercially available thermochromic inks have different narrow and wide cycles. With the development of technology, discoveries have been made in microcapsulation techniques and thermochromic chemistry extending potential applications of these materials (Small and Highberger, 2000; Tutak, 2017; Ozcan, 2019).…”

Section: Introductionmentioning

confidence: 99%

Production of thermochromic microcapsulated inks for smart packaging and examination of printability properties

Ozcan

Ulusoy

2020

PRT

Self Cite

Purpose Stimulant-sensitive materials exhibit physical or chemical reversible changes in their properties as a result of environmental variables. One of these materials is thermochromic materials. Materials with thermochromic sensitivity change their color with heat exchange. For this reason, it can be used in many different fields such as security inks. Such substances decompose rapidly by being affected by weather conditions. Furthermore, the particle sizes are larger than normal pigments, and therefore, it is difficult to stabilize thermochromic dyes. Because of all these adverse conditions, thermochromic colorants must be protected before use in the ink. This protection is planned to be provided by the microcapsulation technique. The purpose of this study is to determine the thermochromic printing inks that can be stored stably by microcapsulation technique, to protect it from environmental conditions and the determination of printability parameters. Design/methodology/approach In this study, capsules with a core material of thermochromic dyeing with polyurea formaldehyde (PUF) or poly-phenolmelamine formaldehyde (PMF) shell were synthesized at appropriate pH and temperature using the appropriate solvent and mixing speed. The chemical structure and dimensions of the obtained capsules were examined by ATR-FTIR and scanning electron microscopy, respectively. The produced thermochromic microcapsules were mixed with alkyd resin and mineral oil and screen printing ink was obtained. Printability tests such as surface morphology, color, gloss and light fastness were applied. Findings As a result, it was determined that PMF is not a suitable encapsulation technique for thermochromic dyes under suitable conditions and eliminates thermochromic property by providing heat stability. It was found that PUF microcapsulation can be used in thermochromic dyestuff encapsulation and does not lose the thermochromic property. It has also been found that PUF microcapsules increase the lightfastness and stability of thermochromic dye ink. Originality/value This study provides experimental research on the encapsulation of a thermochromic dye and its use in ink.