Development of Rice Straw Paper Coated with Pomelo Peel Extract for Bio-Based and Antibacterial Packaging

Abstract

This study aimed to develop paper packaging from rice straw fibers with its function as antibacterial activity obtained from pomelo (Citrus maxima) peels. Paper with ca. 106.42 g/m2 basis weight, 0.34 mm thickness, 34.15 % brightness and 78.7 N.m/g tensile index was prepared from rice straw fibers and pulps. Bioactive compounds of crude pomelo peels extracted using maceration technique with 75% (v/v) ethanol were coated onto rice straw papers at concentration of 10, 15 and 20 % (w/v). The coated papers had similar thickness, and slightly lower tensile index and brightness as compared to those of control papers. Scanning electron microscopy confirmed the changes of surface and cross-section structures of coated and uncoated papers. The rice straw coated papers had relatively greater barrier property to prevent water absorption. In addition, the coated papers with pomelo peel extract showed significant antibacterial activity against food pathogenic bacteria, including Staphylococcus aureus, Bacillus cereus and Escherichia coli. This study reveals the benefits of natural by-products as a potential material for active packaging.

Biosynthesized Poly(3-Hydroxybutyrate) on Coated Pineapple Leaf Fiber Papers for Biodegradable Packaging Application

“…Pineapple leaf fiber paper (PLFP) was prepared by the slightly modified method previously report [ 24 ]. The pineapple leaf fiber was pretreated with 5% ( w / v ) of sodium hydroxide solution at 90 °C for 4 h and then allowed to stand at room temperature for 18 h. The alkaline treated fiber was washed several times with tap water until the pH of water reached neutral.…”

Eco-Friendly Rice Straw Paper Coated with Longan (Dimocarpus longan) Peel Extract as Bio-Based and Antibacterial Packaging

“…The open structure of rice straw allows easy diffusion and penetration of chemicals during cooking at atmospheric temperature [21]. As shown in Figure 1, fairly good rice straw fibers were obtained by cooking with diluted alkaline solution of 20% (w/v) NaOH at 100 ± 10 °C for 3 h. As our previously reported [17] the average length and average width of rice straw fiber are summarized in Table 1. Similar morphology of rice straw fiber was also reported with an average length of 1400 µm and average fiber width was 13 µm [22].…”

“…As our previously reported [ 17 ] the average length and average width of rice straw fiber are summarized in Table 1 . Similar morphology of rice straw fiber was also reported with an average length of 1400 μm and average fiber width was 13 µm [ 22 ].…”

“…The results shown in Table 1 indicate that the obtained rice straw fibers can be used for paper production. Our previous research also revealed that rice straw fibers could be altered as a potential raw material for cellulose-based packaging [ 17 ].…”

“…Although applications of rice straw cellulose and paper have been reported during recent years [ 15 , 16 ] there are few studies on the antibacterial activity of rice straw paper [ 17 ]. Therefore, we report herein the development of biobased and bioactive material by coating longan peel extract onto rice straw paper.…”