DOMATES KABUĞU EKSTRAKTI İLE GÜÇLENDİRİLMİŞ KARBOKSİMETİL SELÜLOZ KULLANILARAK UV ENGELLEYİCİ FİLM ÜRETİMİ: YAPISAL VE FONKSİYONEL ÖZELLİKLER

Öz

Karboksimetil selüloz (CMC), petrol türevi plastiklere doğal bir alternatiftir. Ancak CMC filmler düşük UV bariyeri ve antioksidan özellikler göstermektedir. Bu çalışmada farklı konsantrasyonlarda (%0,25, %0,5 ve %1 ağırlık/hacim) domates kabuğu ekstraktı (TPE) kullanılarak CMC filmlerinin UV bariyeri ve antioksidan özelliklerini iyileştirmek amaçlanmıştır. TPE'nin CMC filmleri üzerindeki etkileri morfolojik, moleküler, mekanik, optik ve biyoaktif özellikler açısından incelenmiştir. Filmlerin kopma uzaması (%18,08-26,47) ve kalınlığı (47,18-61,45 μm) artarken, çekme mukavemeti (33,90-10,05 MPa) ve young modülüs (73,44-3,46 MPa) artan TPE konsantrasyonuyla azalmıştır. En yüksek antioksidan kapasitesi (DPPH için 15,32 mg TE/g ve CUPRAC için 50,11 mg TE/g) %1 TPE ile ölçülmüştür. Bu çalışma, gıda ambalajı için UV korumalı ve antioksidan özellikli film üretiminde TPE kullanımına ilişkin bir bakış açısı sunmaktadır.

Anahtar Kelimeler

• Karboksimetil selüloz
• domates kabuğu
• yenilebilir film
• antioksidan kapasite
• atık değerlendirmesi

UV-BLOCKING FILM PRODUCTION USING CARBOXYMETHYL CELLULOSE REINFORCED WITH TOMATO PEEL EXTRACT: STRUCTURAL AND FUNCTIONAL PROPERTIES

Öz

Carboxymethyl cellulose (CMC) is a natural alternative to petroleum-derived plastics. However, CMC films display low UV barrier and antioxidant properties. This study aimed to improve the UV barrier and antioxidant properties of CMC films using different levels (0.25%, 0.5%, and 1% w/v) of tomato peel extract (TPE). The influences of TPE on CMC films were investigated in terms of morphological, molecular, mechanical, optical, and bioactive properties. The elongation at break (18.08 to 26.47 %) and thickness (47.18 to 61.45 μm) of the films increased, whereas the tensile strength (33.90 to 10.05 MPa) and young modulus (73.44 to 3.46 MPa) of the films decreased with escalating concentration of TPE. The highest antioxidant capacity (15.32 mg TE/g for DPPH and 50.11 mg TE/g for CUPRAC) was measured with 1% TPE. This study provides a perspective on the use of TPE in the production of UV-protective and antioxidant films for food packaging.

Anahtar Kelimeler

• Carboxymethyl cellulose
• tomato peel
• edible film
• antioxidant capacity
• waste valorization

Kaynakça

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