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Mersi Kurniati
Departemen Fisika, FMIPA-IPB Kampus Darmaga, Bogor
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics Public Health Other

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Physical Properties of Bioplastic Composite Synthesized from Sago Waste and Betung Bamboo Activated Carbon Aprilianda, Aprilianda; Budiman, Ismail; Kurniati, Mersi; Sari, Yessie Widya
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 8, No 3 (2023): September 2023
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v8i3.1885

Abstract

Bioplastics are expected to reduce the use of commercial plastics. Several efforts have been made to improve the properties of bioplastics, including the addition of antioxidants or antimicrobial agents. One of the antimicrobial agents is activated charcoal or activated carbon. This study was aimed to investigate the effect of activated carbon addition to the bioplastic composite. Sago waste was utilized as the matrix in the composite, while activated carbon was as filler. Sago waste is the leftover biomass resulted from the sago extraction. The proximate analysis showed that the composition of sago waste was mostly dominated by the fibrous materials followed by protein and fat. The activated carbon was obtained from the treatment of Betung bamboo. The Fourier Transform Infrared (FTIR) spectroscopy indicated that the thermal treatment of Betung bamboo at 175 °C for 5 h resulted The treated sago waste  was immersed in 5% KOH  for 24 h and further dried and then pyrolyzed at 750 °C for 90 min to yield activated carbon. The activated carbon was dominated by the carbonaceous materials. This was also supported by the proximate data indicating the presence of 91% carbonaceous materials in activated carbon.  The Brunauer Emmett Teller (BET) analysis showed that the activated carbon has surface area of 460 m2/g. This activated carbon was then used as filler at bioplastic composites. Two levels of activated carbon percentage on composite were tested, which were 3-5% (% m/v). The mechanical analysis using universal testing machine indicated that the addition of activated carbon reduces the tensile strength and modulus of elasticity. The scanning electron microscopy (SEM) images clearly indicated the presence of activated carbon on the surface of bioplastics.  The data obtained in this study showed the potential of composite sago waste and activated carbon as bioplastics. Further, the activated carbon obtained in this study can serve as an adsorbent, providing possible applications as antibacterial agent. Keywords – Activated Carbon, Biomass, Bioplastic, Composite, Pyrolysis, Sago Waste.
Sifat Mekanik dan Densitas Ikatan Silang Hidrogel berbasis Tapioka Nanopartikel Puspita, Indah; Kurniati, Mersi
Jurnal Riset Fisika Indonesia Vol 3 No 1 (2022): Desember 2022
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v3i1.3665

Abstract

Tapioca is a natural polymer that is widely used as a raw material for hydrogels. In order to improve the mechanical properties of tapioca-based hydrogels, this research modified tapioca by acid hydrolysis method for 2 hours and 24 hours and by ethanol precipitation method. This modified tapioca was further treated with epichlorohydrin with various concentrations of 0, 5, 10, and 20% to produce a three-dimensional cross-linked structure. The results showed that the increasing of epichlorohydrin concentration led to an increasing in the mechanical properties of the hydrogels consisting of hardness, stress, modulus of elasticity, and cross-linked density. The hydrogel from tapioca hydrolyzed for 24 hours and 20% epichlorohydrin was the sample with the best mechanical properties with a hardness of 19.78 mJ, a stress of 78.65 kPa, a modulus of elasticity of 233.84 mJ, and a cross-linked density of 57.61 × 1024 m-3.
Pengaruh Iradiasi Gamma dan Asam Akrilat terhadap Sifat Mekanik Polimer Super Water Absorbent (SWA) Berbasis Onggok Puspita, Indah; Kurniati, Mersi; Winarti, Christina
Jurnal Riset Fisika Indonesia Vol 3 No 2 (2023): Juni 2023
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v3i2.4163

Abstract

The Super Water Absorbent (SWA) polymer is a type of polymer that has exceptional water absorption capabilities while remaining insoluble in water. In this study, the authors conducted research on the modification of SWA by including acrylic acid and acrylamide monomers, followed by a crosslinking process utilising gamma irradiation. This study investigated the impact of acrylic acid and gamma irradiation on the mechanical characteristics of SWA. The experimental findings demonstrated a notable enhancement in the mechanical properties of the hydrogel by the incorporation of acrylic acid. This was evidenced by a substantial rise in the hardness value, which rose from 11.09 mJ to 36.13 mJ.
Co-Authors . Masitoh . Mursyidah Abu Sonip Ade Irma Akhiruddin Maddu Akhrudin Maddu Ana Fitriana Aprilianda, Aprilianda Arifianto, Muhammad Lutfi Budiman, Ismail Christina Winarti Christina Winarti Christina Winarti Christina Winarti Eni Septi Wahyuni Erni Apriliana Erni Aprilina Esti Prihatini Fitrah Hadi Firdaus Fitrah Hadi Firdaus Hendrawan Laksono Horasdia Saragih Indah Puspita Indah Puspita, Indah Irlian Nurmaniah Irmansyah Irmansyah Irzaman, Irzaman Istie Rahayu jumardin jumardin Leni Ariyanti Lisdar Idwan Sudirman Lusia Anita Boru Sagala Lusia Anita Br. Sagala Made Dirgantara Maya Risanti Maya Risanti Miko Saputra Moehamad Barmawi Muhammad Khalid Muhammad Lutfi Arifianto Mujamilah Mujamilah Napthaleni , Napthaleni, Napthaleni Pepen Arifin Purwantiningsih Sugita Puspitasari, Santi Rahmaniah Nalwi Rahmaniah Nalwi Renda Amalia Anggraini Santi Puspitasari Siti Nikmatin Sonny Affandi Sudaryanto Sudaryanto Tuti Wukirsari Tuti Wukirsari Yessie Widya Sari