Effect of Potassium Dichromate on Properties and Biodegradation of Gum Arabic Based Bioplastic Membranes

Abstract

Gum Arabic (GA) collected from Acacia senegal trees was used with polyvinyl alcohol (PVA) to prepare of a series of biodegradable membranes doped and non-doped with potassium dichromate (K 2 Cr 2 O 7 ). Adding the K 2 Cr 2 O 7 to the GA/PVA blends slightly decreased their crystallinity index (CI) by about 2 %. Increasing the PVA concentration in the chromated GA/PVA blends was responsible for increasing the CI. Adding the K 2 Cr 2 O 7 to the pure GA solution modified its differential thermal behavior whereby the exothermic reactions occurred between 321°C and 433°C were disappeared. The K 2 Cr 2 O 7 increased the heat change drastically for all the bioplastic blends with the highest increase for the pure GA. Adding K 2 Cr 2 O 7 to the pure PVA increased the nanometric particle size (NPS) significantly. Increasing the PVA concentration in a blend had a greater effect than did the K 2 Cr 2 O 7 on the NPS. The buried bioplastic membranes in the control soil had different count and species of microbial communities. The numbers of bacteria and fungi in the initial soil sample were lower than those for chromated GA membranes and were greater than those for the chromated PVA. All bacterial and fungi species had growth ability and are expected to be detoxification tools of chromium ion-doped blends of GA and PVA leading to a green environment.

Fabrication, Characterization, and Microbial Biodegradation of Transparent Nanodehydrated-Bioplastic (NDBs) Membranes Using Novel Casting, Dehydration, and Peeling Techniques

“…Moreover, a common trend was registered between the NDB products fabricated in the current investigation and the ADB synthesized by Hindi et al [98] and Hindi and Albureikan [57]. Accordingly, the nano-dehydration invention did not affect the parent's ability to biodegrade the bioplastic membranous product.…”

“…The FTIR for the NDB used in the current work and the ADB created by Hindi et al [98] have main functional groups that share chemical characteristics, accord-ing to the comparison. As a result, the chemical components of the bioplastic products have been preserved by the use of innovative casting blends, nano-dehydration, and membrane peeling.…”

Development of biodegradable starch nanocrystals/gum Arabic hydrogels for controlled drug delivery and cancer therapy

“…The peak at 854.80 cm −1 was assigned to a methene vibration [24]. The FTIR spectra of pure GA are dominated by OH stretching vibrations at 3272.57 cm −1 [25]. The C-H stretching modes are riding over the broad peak at 2913.77 cm −1 [26].…”

Fabrication, Characterization, and Microbial Biodegradation of Transparent Nanodehydrated Bioplastic (NDB) Membranes Using Novel Casting, Dehydration, and Peeling Techniques

“…The crystallinity index (CI) was computed by dividing the diffractogram area of crystalline cellulose by the entire area of the original diffractogram after smoothing the resulting crystalline peaks from the diffraction intensity profiles. Using Microsoft Excel (USA), the area under the curve was calculated by adding adjacent trapezoids [ 98 , 99 , 100 , 101 , 102 , 103 ].…”

“…Microbial biodegradation was assessed to investigate the microbes’ capacity to break down the buildup of bioplastic in soil. Upon calculating the percentage of biodegradation (weight loss), counting the microbe population isolated from the surfaces of bioplastic sheets, and evaluating the various morphological changes in these surfaces as a result of degradation, it was possible to determine the amount of biodegradation [ 98 , 99 ].…”