Open Access

ARTICLE

The Effect of Uncaria gambir on Optical Properties and Thermal Stability of CNF/PVA Biocomposite Films

Remon Lapisa^1,2, Anna Niska Fauza^1,*, Dieter Rahmadiawan^1,3, Krismadinata², Dori Yuvenda^1,2, Randi Purnama Putra^1,2, Waskito¹, Nandy Putra⁴, Hairul Abral⁵

1 Mechanical Engineering Department, Universitas Negeri Padang, Padang, 25173, Indonesia
2 Centre for Energy and Power Electronics Research, Universitas Negeri Padang, Padang, 25173, Indonesia
3 Department of Mechanical Engineering, National Cheng Kung University (NCKU), Tainan, 70101, Taiwan
4 Mechanical Engineering Department, Universitas Indonesia, Depok, 16424, Indonesia
5 Mechanical Engineering Department, Universitas Andalas, Padang, 25163, Indonesia

* Corresponding Author: Anna Niska Fauza. Email: