New textile product quality evaluation method using THz spectroscopic analysis method

2020 Fiscal Year Final Research Report

• Project/Area Number: 17K00785
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Clothing life/Dwelling life
• Research Institution: Shinshu University
• Principal Investigator: Koyama Shouhei 信州大学, 学術研究院繊維学系, 助教 (30777818)
• Project Period (FY): 2017-04-01 – 2021-03-31
• Keywords: THzスペクトル / 繊維状試料 / 並列配置 / 偏光 / 延伸・未延伸 / 分子構造鑑別

Outline of Final Research Achievements

In the conventional THz spectroscopic analysis, the sample is freeze-crushing and the powdery sample is measured. Therefore, the original molecular structure information of the fiber sample could not be measured. We have improved this disadvantage.
As a result, a high S / N ratio THz spectrum could be measured by installing fibers with a diameter of 500 μm or less in parallel. Furthermore, when the fiber sample was irradiated with polarized THz light, THz spectrum shape changed depending on the molecular orientation state in the fiber sample. From the above, by combining infrared spectroscopic analysis and THz spectroscopic analysis, fiber discrimination that takes into account the molecular structure was possible.

Free Research Field

計測工学、繊維工学

Academic Significance and Societal Importance of the Research Achievements

衣類を含め繊維製品は現代の暮らしの中で必要不可欠なものであり，高機能性を有する「スマートテキスタイル」と呼ばれる繊維製品など日々新たな製品が開発・販売されている．繊維製品を販売する際にはメーカーは品質保証のため専門機関での組成検査が義務付けられているが，生産量が増大するにつれて検査機関での労力も増加し迅速な品質評価法が望まれていた．本研究結果により，前処理が簡便で分子構造鑑別が可能となったことから，検査機関での労力低減や短時間でのさらなる高精度での繊維鑑別が達成されることとなる．