Roles and evidence of wood flour as an antibacterial promoter for triclosan-filled poly(lactic acid)

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Prapruddivongs C., Sombatsompop N.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2012

วารสาร: Composites Part B: Engineering (1359-8368)

Volume number: 43

Issue number: 7

หน้าแรก: 2730

หน้าสุดท้าย: 2737

จำนวนหน้า: 8

นอก: 1359-8368

eISSN: 1879-1069

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84864288151&doi=10.1016%2fj.compositesb.2012.04.032&partnerID=40&md5=988050a28587bba976c744db2bf7bc25

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

Mechanical and antibacterial performances of poly(lactic acid) (PLA) were assessed as a function of triclosan and wood fillers under a wide range of contact times using Gram-negative Escherichia coli (E. coli, ATCC 25922) as testing bacteria. Water contact angle (WCA) measurement, Fourier transform infrared spectroscopy (FTIR), and differential scanning calorimetry (DSC) were performed to characterize the PLA, its blend with triclosan, and its composite with wood filler, and used to substantiate the antibacterial performance results. The experimental results suggested that introduction of wood flour changed the mechanical properties of PLA, whereas triclosan had no definite effect on the mechanical properties. E. coli growth appeared to increase with contact time for PLA, but to decrease with contact time for the wood/PLA composites. Based on the results and quantitative evidence, it was proposed that the wood flour acted as an "antibacterial promoter" for triclosan blended wood/PLA composites, which facilitated triclosan migration onto the wood/PLA composite surfaces to kill the bacteria. The molecular interactions between PLA, triclosan and wood were quantitatively characterized experimentally by CAM, DSC and FTIR. The change in hydrophilicity by the presence of wood filler was found to be the main reason for the improved antibacterial activity of triclosan in the wood/PLA composites. ฉ 2012 Elsevier Ltd. All rights reserved.

คำสำคัญ

A. Polymer-matrix composites (PMCs), B. Mechanical properties, D. Thermal analysis, E. Extrusion