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All Journal Jurnal Pendidikan Vokasi INOTEKS : Jurnal Inovasi Ilmu Pengetahuan, Teknologi, dan Seni International Journal of Renewable Energy Development Jurnal Penelitian Pendidikan Matematika dan Sains Matematika dan Sains Science and Technology Indonesia Indonesian Journal of Chemistry Communications in Science and Technology Martabe : Jurnal Pengabdian Kepada Masyarakat Kumawula: Jurnal Pengabdian Kepada Masyarakat Jurnal Ilmu Hukum KYADIREN Jurnal Abdi: Media Pengabdian Kepada Masyarakat Sains dan Matematika PROFICIO: Jurnal Pengabdian Masyarakat International Journal of Science and Society (IJSOC) Abimanyu: Journal of Community Engagement Jurnal Pijar MIPA International Journal of Islamic Education, Research and Multiculturalism (IJIERM) Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek) Molekul: Jurnal Ilmiah Kimia Journal of Engineering and Technological Sciences
Nita Kusumawati
Jurusan Kimia FMIPA Unesa
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Journal : Communications in Science and Technology

 1 
Study in the impact of quaternized graphene oxide (QGO) composition as modifier on the chemical, physical, mechanical, and performance properties of polyvinylidene fluoride (PVDF)-based nanocomposite membrane Ashabul Kahfi; Kusumawati, Nita; Setiarso, Pirim; Supari Muslim; Sinta Anjas Cahyani; Nafisatus Zakiyah
Communications in Science and Technology Vol 9 No 1 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.1.2024.1393

Abstract

Polyvinylidene Fluoride (PVDF) membranes were modified with quaternized graphene oxide (QGO) synthesized from graphene oxide and quaternized ammonium groups. PVDF/QGO membranes were created by blending PVDF and 0.01-0.05 g QGO via phase inversion. FTIR confirmed the successful QGO incorporation. PVDF/QGO membranes exhibited increased mechanical stiffness. Meanwhile, SEM revealed asymmetric morphology with surface and internal pores. AFM showed the membrane with 0.05 g and QGO had the highest surface roughness of 101.2 nm, which increased filtration area and flux. QGO improved hydrophilicity through hydroxyl and quaternary ammonium groups, enhancing water flux up to 1208 Lm?2h?1 for 0.05 g QGO. Cu2+ rejection increased to 75% for 0.05 g QGO membrane due to chelation and adsorption effects. PVDF/QGO membranes displayed bacterial growth inhibition, unlike pristine PVDF. The inhibition zone diameter increased with more QGO, indicating improved antibacterial activity. Overall, this study demonstrated that QGO improved PVDF membranes' hydrophilicity, antibacterial properties, and mechanical strength.
Effect of layered double hydroxide-graphene oxide modifier composition on characteristics of polyvinylidene fluoride based nanocomposite membranes in the separation of Cu2+ Kusumawati, Nita; Setiarso, Pirim; Supari Muslim; Sinta Anjas Cahyani; Nafisatus Zakiyah; Kahfi, Ashabul
Communications in Science and Technology Vol 9 No 1 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.1.2024.1440

Abstract

This research explored the modified polyvinylidene fluoride (PVDF) nanofiber membranes with a composite of layered double hydroxide (LDH) and graphene oxide (GO) to enhance biofouling resistance. The PVDF/LDH-GO nanocomposite membranes were synthesized via vacuum filtration. FTIR analysis confirmed nanocomposite formation with new peaks indicating the presence of GO and LDH. Variations in the LDH:GO ratio affected the physical, mechanical, and performance properties of the membranes. Based on SEM imaging, the 1:1 LDH: GO ratio exhibited the highest Young's modulus and smallest pore sizes. LDH-GO incorporation increased the mechanical strength, porosity, roughness, hydrophilicity, and pure water permeability of the PVDF membranes. The combination of these factors led to balanced permeability and selectivity values towards Cu2+ solution feeds. LDH-GO was proven effective in modifying the PVDF membrane surface for water treatment and inhibiting biofouling up to 64% against E. coli.
Ionic liquid ultrasound-assisted extraction (IL-UAE) for duck feather keratin and in silico evaluation as a potential procollagen n-endopeptidase inhibitor Sianita, Maria Monica; Kusumawati, Nita; Asri, Mahanani Tri; Dzulkarnain, Shod Abdurrachman; Al Hafidl, Achmad Naufal; Kahfi, Ashabul; Nabila, Mutiara Azfa; Setiawan, Ferdiansyah; Isyrak, Luthfiyah; Rahmawati, Khofifatul
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1669

Abstract

This research aims to optimize keratin extraction from duck feathers using an eco-friendly ionic liquid-ultrasound-assisted extraction (IL-UAE) method and evaluate its potential applications in tissue engineering. It investigated the effects of deposition pH (1-6), ultrasonication temperature (40-60°C), and time (60-180 min) on extraction yield and physicochemical properties. The results demonstrated the optimal extraction conditions at pH 3, 40°C, and 60 minutes, yielding 82% keratin with a 0.50 mg/mL concentration, while the lowest yield production was found at pH 6 (33%, 0.20 mg/mL). Meanwhile, characterization via FTIR confirmed predominant ?-sheet structures with characteristic peaks at 3250-3300 cm?¹ (N-H/O-H stretching) and 1700-1500 cm?¹ (C=O stretching). SDS-PAGE revealed pure keratin bands (10-15 kDa), while SEM showed layered, porous morphology suitable for biomaterial applications. Thermogravimetric analysis, furthermore, identified three degradation stages occurred at 0-200°C (3.05% loss), 200-400°C (39.37% loss), and 400-700°C (31.13% loss). Amino acid profiling revealed high L-cystine content (153,064.90-156,926.33 mg/kg) with the significant amounts of glycine (63,958.25-64,064.73 mg/kg), L-proline (77,631.16-77,717.42 mg/kg), and L-leucine (59,111.43-59,198.60 mg/kg). In silico molecular docking studies identified leucine as a promising procollagen N-endopeptidase inhibitor (binding energy -5.0 kcal/mol), which controlled the collagen-breaking and forming process. This ability makes keratin potential to be developed as a scaffold for bone tissue regeneration in medical industry.
The Effect of Ultrasonication on the Quality of Keratin Extraction Based on Ionic Liquid from Duck Feather Perdana, Senja Salzanabila Putri; Kusumawati, Nita; Basukiwardojo, Maria Monica Sianita; Setiarso, Pirim; Djalilah, Gina Noor; Rahmawati, Khofifatul
Communications in Science and Technology Vol 10 No 2 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.2.2025.1785

Abstract

This study investigates the effect of ultrasonic-assisted extraction (UAE) and solvent extraction (SE) on keratin recovery from duck feathers using sodium sulfide-based ionic liquids under different pH conditions. The results showed that SE at acidic pH (pH=3) achieved the highest yield (92%), whereas UAE showed lower recovery (28%) under mildly acidic conditions (pH=5). Spectroscopic and electrophoretic analyses using FTIR confirmed the β-sheet structure with characteristic peaks at 3400 cm−1 (O–H and N–H stretching) and 1660 cm−1 (C=O stretching). Sodium Dodecyl Sulfate Polyacrylamide Gel Electrophoresis analysis (SDS-PAGE) revealed protein bands in the 15–25 kDa range, typical of β-keratin, with higher intensity in SE. Morphological analysis using SEM revealed finer and more homogeneous particles for UAE, while SE produced denser aggregates. Thermal analysis revealed two main degradation stages, occurring at 0–100 °C and 250–500 °C, with UAE samples exhibiting lower residual mass (5.46%) than SE (8.65%). Particle size analysis showed UAE samples had larger but more uniformly distributed particles. XRD results confirmed semi-crystalline structures, with UAE increasing amorphous content and SE maintaining crystallinity. These findings highlight the complementary advantages for tailoring keratin properties toward diverse applications.
Co-Authors A'yun, Qurrota Ach. Yasin Al Hafidl, Achmad Naufal Ashabul Kahfi Ashabul Kahfi, Ashabul Asrul Bahar Auliya, AR. Sella Berlian, Binar Bertha Yonata Cahyani, Sinta Anjas Dewi Saputri, Ratih Dina Kartika Maharani Dzulkarnain, Shod Abdurrachman Elvina Rossa Erina Rahmadyanti Estiningtyas, Indri Wasa Fachrirakarsie, Fadlurachman Faizal Fatma Listiandari, Intan Gina Noor Djalilah Hafidha, Qonita Arky Hapsari, Veronica Lita Hasanah Jusman, Nur Hery Widijanto I GUST MADE SANJAYA Indah, Novita K. Isyrak, Luthfiyah Iwan Permadi Khafidlah, Ianatul Kurniawan, Muhammad Ridho Hafid Mahanani Tri Asri Maria Monica Sianita Maria Monica Sianita Basukiwardojo MEDA WAHINI Monica, Maria Mugiyanto, Agus Nabila, Mutiara Azfa Nafisatus Zakiyah Naulia, Kaila Nuniek Herdyastuti Nur Hayati Nur Hayati Nurrohman Sidiq, Muhammad Nurzulla, Weka Firda Rizki OCKTAVIANI, YOVI Perdana, Senja Salzanabila Putri Phra Harini, Novitasari Dian Pinto, Floriana A. Pirim Setiarso Prahara, Mirwa Adi Prima Retno Wikandari Putri, Marinda Mayliansarisyah Putri, Sovranita Ramadhani Setiawan Rahayu, Nunik Tri Rahmawati, Khofifatul Ramadanti, Awanda Halida Restuti, Hermasari Rhamdiyah, Fastabiqul Khairati Rinaningsih Riska Nur Safitri, Riska Nur Rita Ismawati Rudi Setiawan, Ahmad Rus, Ridwan Che Rusmini Rusmini Safitri, Rizka Dwi Samik Samik Sanjaya, IGM Sari Edi Cahyaningrum Setiawan, Ferdiansyah Sinta Anjas Cahyani Sri Handajani Supari Muslim Supari Muslim Sutoyo, Suyatno Titik Taufikurohmah TRIMAYANTO, SIGIT Yani Ekwandi Wibowo Yulianto, Egy Henry Zakiyah, Nafisatus