Effects of drying methods and plasticizer concentration on some physical and mechanical properties of edible chitosan films

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Thakhiew W., Devahastin S., Soponronnarit S.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2010

วารสาร: Journal of Food Engineering (0260-8774)

Volume number: 99

Issue number: 2

หน้าแรก: 216

หน้าสุดท้าย: 224

จำนวนหน้า: 9

นอก: 0260-8774

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-77950296460&doi=10.1016%2fj.jfoodeng.2010.02.025&partnerID=40&md5=0f81135f427b91e4e6f38f3130c7ce1e

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

In order to alleviate shortcomings of edible chitosan films, which are rigid and brittle in nature, an idea of using advanced drying methods, in combination with appropriate concentration of plasticizer, to improve the mechanical properties of the films was proposed and tested. Physical (thickness and color) and mechanical (tensile strength and percent elongation) properties of edible chitosan films plasticized at four glycerol concentrations (0%, 25%, 75% and 125% w/w chitosan) and prepared by three drying methods, namely, hot air drying (≈40 °C), vacuum drying and low-pressure superheated steam drying (LPSSD) (90 °C, 10 kPa) were investigated. Dynamic mechanical thermal analysis (DMTA) was used to determine the glass transition temperature to verify the compactness of edible chitosan films. It was found that the drying methods and plasticizer concentration significantly affected the drying time, tensile strength, percent elongation and glass transition temperature of the films. On the other hand, the drying methods and plasticizer concentration did not affect the thickness and final moisture content of the film samples at lower glycerol concentrations. In the cases of vacuum drying and LPSSD, there was a limiting value of plasticizer concentration (25% w/w) beyond which the effect of the plasticizer concentration on the mechanical properties was negligible. In all cases, the color of all tested films was not significantly different. © 2010 Elsevier Ltd. All rights reserved.

คำสำคัญ

Dynamic mechanical thermal analysis, Glass transition temperature, Percent elongation, Thickness