Improvement of mechanical properties of chitosan-based films via physical treatment of film-forming solution

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

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

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2015

วารสาร: Journal of Food Engineering (0260-8774)

Volume number: 158

หน้าแรก: 66

หน้าสุดท้าย: 72

จำนวนหน้า: 7

นอก: 0260-8774

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925061280&doi=10.1016%2fj.jfoodeng.2015.02.027&partnerID=40&md5=5acfad5e7ade8ea588295cf25de4b397

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

Although biopolymer films are of interest from many points of view, these films have inferior mechanical properties to commercially available synthetic polymer films. The present study therefore aimed to seek a means to improve the mechanical properties of biopolymer films; chitosan was chosen as the biopolymer of interest. The effects of selected physical methods that can be incorporated into the film-forming solution preparation process were investigated. Heat treatment by heating the film-forming solution at 70 ฐC for 1 h to induce thermal cross-linkage of chitosan polymer chains was evaluated. In addition, the effects of some processes that led to the homogenization of the chitosan solution and plasticizer (glycerol) were tested. These included rotor-stator homogenization at 9600 rpm at atmospheric pressure and two-stage high-pressure homogenization at a gauge pressure of either 10/5, 20/5 or 30/5 MPa. The prepared film-forming solutions were then dried by hot air drying at 40 ฐC and the obtained films were tested for their properties and characteristics in terms of the tensile strength, percent elongation, X-ray diffraction as well as dynamic mechanical analysis patterns. Chitosan film exhibiting the best mechanical properties was the one prepared from the film solution that did not pass through the heat treatment but passed through the high-pressure homogenization at 10/5 MPa, with the tensile strength and percent elongation of about 46 MPa and 36%, respectively. Compared to the control film, there was an increase of about 23% in the tensile strength and 25% in the percent elongation. ฉ 2015 Elsevier Ltd. All rights reserved.

คำสำคัญ

Crosslinkage interactions, Dynamic mechanical analysis, Heat treatment, Homogenization