Electronic Theses and Dissertation

Penelitian terkait analisis sifat fisikokimia dari intelligent active film berbahan pati ubi jalar ungu-kitosan dengan penambahan antosianin dari ekstrak ubi jalar ungu telah dilakukan. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan variasi antosianin terhadap struktur, kristalinitas, laju transmisi uap air, permeabilitas uap air, daya serap air, transparansi, opasitas, dan UV-Barrier dari intelligent active film. Analisis gugus fungsi dilakukan dengan menggunakan instrumen FTIR menunjukkan pola puncak serapan yang serupa pada 3441 cm-1, 2937 cm-1, 2358 cm-1, 1644 cm-1, 1409 cm-1, dan 1020 cm-1, perubahan amplitudo pada beberapa puncak serapan dikarenakan pembentukan ikatan hidrogen CH/IB-anthocyanin. Kristalin film diidentifikasi dengan analisis spektrum XRD. Analisis laju transmisi uap air dan permeabilitas uap air menurun dengan penambahan antosianin. Film CH/IB-0 dengan penambahan antosianin 10% memiliki nilai laju transmisi uap air dan permeabilitas uap air yang paling rendah. Daya serap air menurun seiring dengan bertambahnya konsentrasi antosianin karena terbentuknya ikatan hidrogen pada CH/IB-anthocyanin yang akan membatasi interaksi molekuler antara polimer dan molekul air. Analisis tranparansi, opasitas dan UV-Barrier yang dilakukan dengan spektrofotometer UV-Vis menunjukkan keempat variasi intelligent active film dapat menghalangi transmisi cahaya pada daerah UV (

Research related to the analysis of the physicochemical properties of intelligent active film made from purple-chitosan sweet potato starch with the addition of anthocyanins from purple sweet potato extract has been carried out. This study aims to determine the effect of adding anthocyanin variations on the structure, crystallinity, water vapor transmission rate, water vapor permeability, water absorption, transparency, opacity, and UV-Barrier of intelligent active film. Functional group analysis performed using the FTIR instrument showed similar absorption peak patterns at 3441 cm-1, 2937 cm-1, 2358 cm-1, 1644 cm-1, 1409 cm-1, and 1020 cm-1, changes in amplitude at several absorption peaks due to the formation of CH/IB-anthocyanin hydrogen bonds. Crystalline film was identified by XRD spectrum analysis. Analysis of the rate of transmission of water vapor and the permeability of water vapor decreases with the addition of anthocyanins. CH/IB-0 films with the addition of 10% anthocyanins have the lowest values of water vapor transmission rate and water vapor permeability. The absorbency of water decreases as the concentration of anthocyanins increases due to the formation of hydrogen bonds in CH/IB-anthocyanins that will limit the molecular interaction between polymers and water molecules. Transparency, opacity and UV-Barrier analysis performed with a UV-Vis spectrophotometer showed that all four variations of intelligent active film could block light transmission in the UV region (