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All Journal Jurnal Teknoin ALCHEMY Jurnal Penelitian Kimia
Ifa Puspasari
Universitas Islam Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering

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Effect of Chitosan Pre-Treatment on Color Fastness of Cotton Fabric with Natural Dyes from Mango Leaves Extract Febri Fajri Yanti; Namira Rezqia Andevita; Ifa Puspasari
Teknoin Vol. 27 No. 1 (2021)
Publisher : Faculty of Industrial Technology Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknoin.vol27.iss1.art2

Abstract

Application of natural dyes in textile coloring has been widely used because it is more environmentally friendly than synthetic dyes and is able to produce various colors from one natural dye. In this study, cotton fabric was treated with chitosan at different concentrations (0, 0.25%, 0.5%, and 1%) to determine its effect on the color fastness using mango leaves extract as natural dyes. Fastness to ironing, washing and sun drying of chitosan-treated samples were measured and compared with untreated samples. The effect of using different types of mordants (ferrous sulphate and alum) was also investigated. Coloring of the dyed fabric was evaluated in terms of color parameters (L* a* b*) and the dye absorption was evaluated using K/S values. The results showed that the color fastness to wet and dry rubbing at each concentrations of chitosan and different types of mordants were good. However, the fabric processed with ferrous sulphate has a lower value of color fastness to ironing than that with alum. The color fastness to washing showed quite good results. The color fastness to sun drying showed that the cotton fabric with or without pre-treatment with chitosan showed good results. However, the value of fabric processed with ferrous sulphate showed very good values compared to alum. High values of K/S were obtained on fabrics pre-treated with chitosan for all types of mordants. Fabric processed with alum showed high color brightness.
Synthesis and Characterization of Microcellulose from Red Algae Gracillaria longissima and Its Effect on the Properties of Composite Films from Avocado Seed Starch Muvika Putri Puspitasari; Ifa Puspasari; Diana Diana; Yulirohyami Yulirohyami
ALCHEMY Jurnal Penelitian Kimia Vol 21, No 2 (2025): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.21.2.97299.414-423

Abstract

Red algae are abundant worldwide, and in recent years, their use to make more valuable products has grown significantly. The present study used red algae Gracillaria longissima as raw material to produce microcrystalline cellulose to strengthen avocado seed-based film. Microcrystalline cellulose was obtained by chemically treating the red algae with alkali, bleaching, and acid hydrolysis. The rough and irregularly shaped microcrystalline cellulose was successfully isolated at the micrometric scale with an average particle size of 44.1 μm. The as-extracted microcrystalline cellulose was used as filler to produce avocado seed-based composite films with improved tensile and barrier properties. Adding 4 wt% microcrystalline cellulose into the avocado seed matrix increased tensile strength by 152% and reduced elongation by 63%. Additionally, the barrier properties of avocado seed composite films were similar to those of cellulose derivatives utilized in food packaging. Adding 4 wt% microcrystalline cellulose into the avocado seed matrix reduced the water vapor transmission rate by 43% of the neat starch value. Considering these findings, microcrystalline cellulose-containing starch film is suggested as a biodegradable substitute for applications in food packaging.
Co-Authors Diana Diana Febri Fajri Yanti Muvika Putri Puspitasari Namira Rezqia Andevita Yulirohyami Yulirohyami