Carnauba ve Soya Mumu Kullanılarak Üretilen Biyobazlı Kâğıt Kaplamaların Su Bariyer Özelliklerinin İncelenmesi

Abstract

Gıda uygulamaları için kâğıt ve karton ambalajların kuvvetli nem direncine sahip olmaları ve dispersiyon kaplama uygulamaları, basım ve ambalaj sektörünün önde gelen konularından biri olmuştur. Bu çalışmada, kağıtlar, soya proteini izolatı (SPI) baz olmakla birlikte soya mumu ve Carnauba mumu ile karıştırılarak hazırlanan iki farklı yeni dispersiyon bariyer kaplaması ile kaplanmıştır. Uygulanan kaplamaların, kağıtların optik, mekanik ve bariyer özellikleri üzerindeki etkilerini incelemek için farklı test yöntemleri kullanılmıştır. ASTM E-96 Desiccant yöntemi kullanılarak su buharı bariyeri özellikleri, FTA200 cihazı ile sarkıt damla yöntemi ve Young denklemi kullanılarak temas açısı ve yüzey enerjisi, “Instron” çekme mukavemeti test cihazı kullanılarak çekme mukavemeti (TS) ve uzama yüzdesi (% EB), X-rite eXact spektrofotometre cihazı kullanılarak kaplamalı, kaplamasız ve basılı numunelerin CIE L*a*b* değerleri, Technidyne PROFILE/Plus® kullanılarak kağıt ve baskı parlaklığı ölçümleri hazırlanan örnekler üzerinden yapılmıştır. Kaplamaların kâğıt CIE L*a*b* değerleri 5 değerinin altında kalarak uygun bir kaplama rengine sahip olduğu tespit edilmiştir. Ayrıca kaplamaların kâğıt yüzey ve baskı parlaklığı artmıştır. Bariyer özellikleri, yani su buharı geçirgenliği (WVP), yüzey ıslanabilirliği ve su direnci hem soya mumu hem de carnauba mumu eklendiğinde iyileştirilmiştir.

Keywords

• soya proteini izolatı
• soya mumu
• Carnauba mumu
• kâğıt
• WVP

Investigation of Water Barrier Properties of Biobased Paper Coatings Produced Using Carnauba and Soy Wax

Abstract

The strong moisture resistance of paper and board packaging for food applications and the application of dispersion coatings have become one of the leading laws of the printing and packaging industry. In this study, papers were coated with two different new dispersion barrier coatings prepared by mixing soy protein isolate (SPI) base with soy wax and Carnauba wax. Different test methods were used to study the effects of applied coatings on the optical, mechanical and barrier properties of papers. Water vapor barrier properties were measured using the ASTM E-96 Desiccant method, contact angle and surface energy using the pendant drop method and Young's equation using the FTA200 device, tensile strength (TS) and elongation percentage (% EB) using the “Instron” tensile strength tester, CIE L*a*b* values of coated, uncoated and printed samples using the X-rite Exact spectrophotometer, and paper and print gloss measurements using Technidyne PROFILE/Plus® were performed on the prepared samples. The paper CIE L*a*b* values of the coatings remained below 5 and had a suitable coating color. The coatings also increased the paper surface and printing gloss. The barrier properties, i.e. water vapor permeability (WVP), surface wettability and water resistance, were improved when both soy wax and carnauba wax were added.

Keywords

• soy protein isolate
• soy wax
• Carnauba wax
• paper
• WVP

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