Proceeding2562

1291 การประชุมวิชาการระดับชาติมหาวิทยาลัยทักษิณ ครั้งที่ 29 ประจ�ำปี 2562 วิจัยและนวัตกรรมเพื่อการพัฒนาที่ยั่งยืน Physical properties of zinc oxide nanoparticles and their fungal inhibitory of Aspergillus Niger on tube sedge basketry Chat Pholnak 1* , Jidapa Khongbun 2 , Kullanan Suksom 2 , Monthon Lertworapreecha 3, and Sumetha Suwanboon 4 Abstract Introduction : Mold, Aspergillus Niger fungus, that grows in the form of multicellular filaments can often attack the local cellulosic basketry products in rainy season. Objective : To study the efficiency and effectiveness of synthesized zinc oxide nanoparticles which inhibited Aspergillus Niger on local tube-sedge ( Lepironia Articulata ) basketry’s surfaces of Talaynoi community. Methods : Zinc oxide nanoparticles were synthesized by simple chemical route, based on green method, using Zn(CH 3 COO) 2 •2H 2 O at concentration of 0.05 M, 0.1 M, and 0.2 M and fixed 0.2 M of NaOH. And chitosan (MW- 4000) was used as a capping agent with the amount of 1.25 g and 2.5 g. Also, various techniques including XRD, FE-SEM, and EDS were analyzed physical properties of samples. Results : SEM micrographs revealed that nanosized ZnO powder was good distributed on surfaces of chitosan and some samples were encapsulated in the chitosan matrices. XRD spectra analysis shown that the samples possessed of mixed phases of hexagonal wurtzite ZnO and broad peak of chitin phases. However, the charac- teristic peaks of ZnO decreased residually when the concentrations of Zn(CH 3 COO) 2 were increased (0.1 M and 0.2 M). Furthermore, coated sample with wt.% ratio of Zn(CH 3 COO) 2 :chitosan equal to 1:0.3 could highly pro- tected Aspergillus Niger on tube-sedge surfaces when compared to other samples and manufacturing chemical coating. Antifungal activity was exceeded to 20 days in ambient conditions. Conclusion : It was satisfactorily that effective synthetic ZnO NPs could excellent inhibited Aspergillus Niger fungus on the cellulosic surfaces of local basketry products efficiently. Keywords : Nano-Zinc Oxide, Chitosan, Basketry, Tube Sedge, Green Method