Rahmat Doni Widodo, Muhammad Irfan Nuryanta, Prima Astuti Handayani, Rizky Ichwan, Edi Syams Zainudin, Muhammad Akhsin Muflikhun
The authors regret < that Figure 9 in the original published version of this article was incorrect, as it did not represent the intended FTIR results. The correct version of Figure 9 is provided below.(Figure presented) This error does not affect the results or conclusions of the paper. >. The authors would like to apologise for any inconvenience caused. © 2026 .
Department of Mechanical Engineering, Universitas Negeri Semarang, Semarang, Indonesia; Department of Chemical Engineering, Faculty of Engineering, Universitas Negeri Semarang, Semarang, 50229, Indonesia; Advanced Engineering Materials and Composite Research Centre (AEMC), Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, UPM, Serdang, Selangor, 43400, Malaysia; Department of Mechanical and Industrial Engineering, Faculty of Engineering, Universitas Gadjah Mada, Jl. Grafika No. 2, Yogyakarta, 55281, Indonesia
