Development and Characterization of Self -assembled Bacterial Cellulose Nonwoven Film

ABSTRACT

Bacterial cellulose is one of the widely discussed biomaterials due to its unique physical, mechanical and chemical characteristics. In this research, bacterial cellulosic film (BCF) was developed using Acetobacter xylinum strain in green tea as a source of carbon under static culture conditions. The developed BCF was evaluated for their morphological properties using a scanning electron microscope and the approximate fiber diameter noted as 38–40 nm. The purity of the cellulose evaluated through an X-ray diffraction method identified that the developed cellulose is Iα rich – triclinic type with 89.61% of crystallinity. The thermal behavior of the BCF was evaluated using TGA and DSC. The results indicated that the major weight loss occurred from 250 to 500°C. The glass transition temperature (Tg) of the developed BCF was very high and it was 165°C. Concerning the mechanical properties, the BCF had lower tensile strength (13.82 Kgf/Cm²), Elongation (10.13 mm) and air (19.72 cm³/cm²/sec) and water vapor permeability value (151 g/m²/day) than the woven cotton fabric. However, the water absorbency (0.7 s) and water holding capacity (320%) are superior to the cotton fabric. The contact angle of the BCF was noted around 28.53°, which is an indication of the higher hydrophilic nature of the BCF. These results provide an insight into the potential applications of bacterial cellulosic material in the apparel and textile sector.

抽象

细菌纤维素具有独特的物理、机械和化学特性，是广受讨论的生物材料之一. 在这项研究中，细菌纤维素膜（BCF）是利用绿茶中的乙酸杆菌木化菌株在静态培养条件下的碳源而开发的. 使用扫描电子显微镜评估所开发的BCF的形态特性，并估计其近似纤维直径为38-40nm. 通过X射线衍射法评估的纤维素纯度表明，已开发的纤维素具有I+ 富度-三临床类型，结晶度为89.61%. 使用 TGA 和 DSC 评估了 BCF 的热行为. 结果表明，主要减肥发生在250至500⁰C. 开发的BCF的玻璃过渡温度（Tg）非常高，为165⁰C摄氏度。在机械性能方面，BCF的抗拉强度（13.82 kgf/Cm2）、伸长率（10.13毫米）和空气（19.72 cm3/cm2/sec）和水汽渗透率值（151克/平方米/天）低于织布。然而，吸水性（0.7s）和保水能力（320%）优于棉织物. BCF的接触角在28.53⁰附近被注意到，这表明BCF的亲水性较高. 这些结果有助于深入了解细菌纤维素材料在服装和纺织行业的潜在应用.

KEYWORDS:

• Acetobacter xylinum
• bacterial cellulosic film
• static culture
• X-ray diffraction
• TGA-DSC analysis
• mechanical properties
• moisture related properties

关键词:

• 乙酸杆菌木化
• 细菌纤维素
• 静态文化
• X射线衍射
• TGA-DSC分析
• 机械性能
• 水分相关特性