Atomic force microscopy study of surface microstructure properties of hydroxypropylcellulose/cinnamaldehyde composite biofilm

¹ Food Technology Department, Faculty of Engineering, Bina Nusantara University, Jakarta, Indonesia 11480
² Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka-shi, Fukuoka, 819-0395, Japan
³ Laboratory of Postharvest Science, Faculty of Agriculture, Kyushu University, W5-873,744, Motooka, Nishi-ku, Fukuoka-shi, Fukuoka, 819-0395, Japan

^* Corresponding Author: ata.wardana@binus.edu

Abstract

This study used atomic force microscopy (AFM) to examine the microstructure properties of a composite biofilm made of hydroxypropylcellulose (HPC) and cinnamaldehyde (CDH). The zeta potential of the HPC-based solution was found to decrease from -1.31 to - 3.24 (mV) with the addition of CDH-emulsified CDH, according to Zetasizer analysis. Additionally, the roughness of the surface properties showed an increasing trend. AFM analysis indicated that the surface roughness of the HPC film increased by 1.31 and 4.01 nm in terms of arithmetical mean deviation from the mean (Ra) and root mean square deviation from the mean (Rq), respectively, with the addition of CDH-emulsified CDH. Changes in the surface properties of the biofilm could affect its barrier properties, such as water resistance and light transmission.