MECHANICAL PROPERTIES OF BIOPLASTICS JANENG STARCH (Dioscorea hispida) FILM WITH GLYCEROL AND ZINC OXIDE AS REINFORCEMENT

Abstract

The biodegradable plastics have been synthesized from janeng starch with the addition of ZnO and Glycerol as plasticizers. The process has used ZnO with variation of concentration by 1%, 3% 6%, then Glycerol with volume 1 ml, 3 ml, and 6 ml. The utilization of 6% ZnO and 3 ml of glycerol showed the highest tensile strength of 2.8 kgf/cm 2 ; conversely, the highest percent elongation was obtained at 1% ZnO with addition 6 ml glycerol to be 4.5%. The lowest water absorption was captured in the composition of 6% ZnO with the addition of 1 ml of glycerol, which was equal to 2.9%, and the decomposition process occurred for 27 to 36 days.

Preparing and Characterizing Novel Biodegradable Starch/PVA-Based Films with Nano-Sized Zinc-Oxide Particles for Wound-Dressing Applications

“…By adding nZnO particles to the solution, the free water molecules content decreases, which reduces flexibility and increases the strength of the resulting films. The reported observations are in good agreement with open literature [12,17,25]. Since the average thicknesses of the different samples used in calculating the UTS were relatively close, the effect of sample thickness on the dressings' UTS is negligible in this study.…”

“…The starch/PVA/nZnO composite generated by the casting method had good swelling, gel fraction, and mechanical properties to maintain a moist and antibacterial environment for wounds. The ZnO nanoparticles acted as fillers to reinforce the composite, leading to higher tensile strength and more stable and flexible wound dressings [7,17].…”

“…In addition, embedding non-toxic metal-oxide particles such as nano-zinc-oxide (nZnO) for its ability to enhance the thermal, mechanical [17], and vapor transmission rate properties in wound dressings [18][19][20] and packaging material applications has attracted a great deal of attention and has been investigated in several publications [21][22][23]. Incorporating the nZnO into wound dressing sheets supports the antibacterial features [24,25] and increases healing rates [26].…”

“…Although a few research groups have used nZnO particles in different applications such as bioplastics, wound dressings, and food packaging [17][18][19][20][21][22][23], based on our best knowledge, the effects of adding nZnO particles on functional starch/PVA/glycerol-based wound dressings have not been studied. Therefore, in this work, the nZnO particles were inserted into a starch/PVA/CA/glycerol film (SPCG) to prepare biodegradable and antibacterial wound dressing materials.…”

The simultaneous extraction of cellulose fiber and crystal biogenic silica from the same rice husk and evaluation in cellulose‐based composite bioplastic films

“…[ 69 ] When bioplastic containing 1% ZnO was completely biodegrading for 30 days, bioplastic with 6% ZnO showed more biodegradation time since a large amount ZnO ensured more durable bioplastics. [ 70 ] In line with these reports, the content of 3% Zn might reduce the biodegradability of bioplastic films in our study. Additionally, during biodegradation analysis, we did not expect the ingested ZnCl 2 by microorganism as ZnCl 2 is an inorganic molten salt and microorganism is only interested in material containing organic carbon such as example cellulose (mostly) and glycerol in this study.…”