Article Per Year (5 Year)
p-Index From 2021 - 2026
0.659
P-Index
This Author published in this journals
All Journal Jurnal Sains Materi Indonesia Journal of Fibers and Polymer Composites JEAS
Jamilah, Umi Lailatul
Laboratorium Of Material Physics, Department Of Physics, Faculty Of Mathematics And Natural Sciences, University Of Jember
Agriculture, Biological Sciences & Forestry Chemistry Education Materials Science & Nanotechnology Physics Other

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
THE IMPROVEMENT OF RAMIE FIBER PROPERTIES AS COMPOSITE MATERIALS USING ALKALIZATION TREATMENT: NaOH CONCENTRATION Umi Lailatul Jamilah; Sujito Sujito
Jurnal Sains Materi Indonesia Vol 22, No 2: APRIL 2021
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jsmi.2021.22.3.6182

Abstract

THE IMPROVEMENT OF RAMIE FIBER PROPERTIES AS COMPOSITE MATERIALS USING ALKALIZATION TREATMENT: NaOH CONCENTRATION. Ramie fiber is a plant fiber that has good quality and potential as a constituent of composite materials. In this study, ramie fiber surface modification was conducted through alkalization with various at 0%, 4%, 5%, 6%, 7%, 8%, and 9% concentrations of NaOH using a magnetic stirrer with a speed of 200 rpm at 70οC for 5 hours. Alkaline ramie fibers are characterized using the Cheson method to determine the chemical composition of ramie fiber, FT-IR test to determine the function group of ramie fiber, morphological test to know the surface structure and diameter of ramie fiber, as well as tensile test to know the tensile strength and tensile modulus of PLA/ramie composite. Overall, the increase of NaOH concentration up to 8% percentage was able to increase the level of cellulose and lignin ramie fibers by 88.180 % and 2.444 %, as well as lower hemicellulose levels of 1.446 %. The alkalization treatment of 8% NaOH, optimally reduces the hydrophilic properties of the fiber. The increased concentration of NaOH makes the fiber surface cleaner and the diameter smaller, but the fiber structure is damaged at a concentration of NaOH more than 8%. Tensile test results showed that alkalized ramie fibers with an 8% concentration of NaOH produced PLA/ramie composites with the highest tensile strength and tensile modulus of 57.37 MPa and 248.25 MPa. Thus, the optimum ramie fiber properties are increased using alkalization with an 8% concentration of NaOH.
MODIFIKASI SERAT ALAM DAN KARAKTERISASINYA SEBAGAI PENGUAT MATERIAL KOMPOSIT Umi Lailatul Jamilah; Elok Hidayah
JEAS (Journal of Educational and Applied Science) Vol. 2 No. 1 (2024): September 2024
Publisher : Tadris IPA Universitas KH. Mukhtar Syafaat Blokagung Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30739/jeas.v2i1.3352

Abstract

Environmental concerns have influenced a number of researchers to develop nature-based composite materials. These composite materials are composed of fibers and matrix, which are partially or completely derived from nature. Natural fibers are widely applied to reduce the utilization of synthetic fibers. However, natural fibers have hydrophilic properties that make it difficult to interact with the matrix, which tends to be hydrophobic. This condition results in the weak mechanical strength of natural fiber-reinforced composite materials. It is necessary to modify the surface of natural fibers, so that the interaction between natural fibers and the matrix can be improved, so that the resulting mechanical strength also increases. A number of analyses on natural fiber surface modification are discussed in this article to discuss the effect of each natural fiber surface modification method, as well as its characteristics when applied as reinforcement in composite materials. The analysis in this article includes several modification methods such as: alkalization, silane, and acetylation, as well as composite mechanical characteristics such as: tensile strength and elastic modulus. The analysis process is carried out by collecting several reference sources from books, and scientific articles accredited by national or international journals. Among the three methods analyzed, alkalization is the most widely applied method for natural fiber surface modification.
Effect of Hair Particle Filler on the Characteristics of Green Composite Based on Bacterial Cellulose Jamilah, Umi Lailatul; Purwandari, Endhah; Sujito, Sujito
Journal of Fibers and Polymer Composites Vol. 5 No. 1 (2026): Journal of Fibers and Polymer Composites
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jfpc.v5i1.563

Abstract

The growing demand for sustainable materials and effective waste management has encouraged the development of environmentally friendly composites. Green composites are a promising alternative to conventional materials for environmental preservation. In this study, bacterial cellulose derived from nata de coco was used as a matrix, while haircut waste particles served as a filler. Composites were fabricated via compression molding at 170 °C with filler contents of 0, 15, 25, 35, and 45 wt.%. The synthesized materials were characterized through tensile testing, scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) spectroscopy. Increasing hair-particle content increased the elastic modulus from 44.11 ± 3.02 MPa (A1) to 130.46 ± 4.94 MPa (A2), indicating enhanced stiffness of the composite; however, further increases in filler content slightly reduced the modulus due to possible void formation and weaker interfacial adhesion. In contrast, the tensile strength decreased progressively from 11.54 ± 0.56 MPa (A1) to 5.16 ± 0.52 MPa (A5) with increasing filler content. SEM observations revealed the formation of voids and weaker matrix–filler interactions at higher filler contents, which contributed to the reduction in tensile strength. FTIR spectra showed the presence of O–H, C–H, and C=O functional groups, suggesting possible interactions between bacterial cellulose and hair particles. Overall, a filler content of 15 wt.% provides the best balance between stiffness and structural integrity, demonstrating the potential of hair waste as a sustainable reinforcement in bacterial cellulose-based green composites.
Co-Authors Endhah Purwandari Hidayah, Elok Sujito Sujito Sujito Sujito