期刊
CELLULOSE
卷 17, 期 6, 页码 1203-1211出版社
SPRINGER
DOI: 10.1007/s10570-010-9457-z
关键词
Bacterial cellulose; Heterogeneous esterification; Hexanoic acid; Surface energy; Water vapor and gas permeation
资金
- FCT (Fundacao para a Ciencia e a Tecnologia) [PTDC/QUI/68472/2006]
- Fundação para a Ciência e a Tecnologia [PTDC/QUI/68472/2006] Funding Source: FCT
Modified bacterial cellulose membranes with tailored properties, regarding their surface and barrier properties were prepared by controlled heterogeneous esterification with hexanoyl chloride. The characterization of the esterified bacterial cellulose membranes was performed by FTIR spectroscopy, elemental analyses, X-ray diffraction, thermogravimetry and contact angle measurements. The esterified membranes showed an increased hydrophobic surface character, while preserving the bulk structure of the pristine material. The evaluation of the barrier properties was carried out through permeability measurements towards water vapor at different relative humidities and by the permeability towards humidified carbon dioxide, oxygen and nitrogen using the time-lag method. A decrease of roughly 50% in both water and gas permeation through bacterial cellulose membranes was observed after heterogeneous esterification. The bacterial cellulose membranes prepared are a good and interesting example of the development of bio-based materials with promising applications in the packaging industry.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据