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All Journal World Chemical Engineering Journal Teknika: Jurnal Sains dan Teknologi Journal of Community Service in Science and Engineering
Barleany, Dhena Ria
Universitas Sultan Ageng Tirtayasa
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Transportation

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Influence of chitosan addition on the properties and characteristics of acrylic acid-chitosan based superabsorbent prepared through gamma irradiation technique and its application for urea loading Jayanudin, Jayanudin; Lestari, Retno Sulistyo D.; Barleany, Dhena Ria; Pitaloka, Alia Badra; Yulvianti, Meri; Demustila, Harly; Yulianto, Amin; Anggoro, Dendy Vito; Ruhiatna, Adam
Jurnal Teknika Vol 19, No 2 (2023): AVAILABLE ONLINE IN NOVEMBER 2023
Publisher : Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/tjst.v19i2.20842

Abstract

Superabsorbent can be used as a carrier for urea-fertilizer which can release urea slowly and can be used as a dry soil moisturizer. The main goal of the current study was to investigate the influence of adding chitosan grafted onto acrylic acid as a superabsorbent base material on the properties and characteristics of the resulting superabsorbents. The method used to prepare the superabsorbent was the gamma irradiation technique. Acrylic acid was neutralized by adding KOH, and then chitosan was added. The mixture was put in a plastic container, followed by irradiation with gamma rays. The formed superabsorbent was washed and dried in an oven, then the dry superabsorbent was analyzed for its properties and characteristics. The results showed that superabsorbent properties such as swelling ratio (from 49.38 g/g to 49.38 g/g), water retention (0.43%-0.89% after 7 days), and urea loading (86.75% to 96.4%) were affected by the amount of chitosan added. However, adding too much chitosan can reduce the superabsorbent properties. The characterization of the superabsorbent revealed a smooth surface with a porous structure, and FTIR analysis showed that chitosan was grafted onto acrylic acid.   
Application of digital marketing innovation in creative industries in Waringinkurung Village, Serang Regency Gunawan, Akbar; Barleany, Dhena Ria; Putri, Ardini; Khairunnisa, Zahra
Journal of Community Service in Science and Engineering (JoCSE) Vol 3, No 2 (2024): Available Online in October 2024
Publisher : Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jocse.v3i2.28029

Abstract

The creative industry is a growing business sector that draws significant attention due to its reliance on skills and talents, which improve welfare and create employment opportunities. One example is Mrs. Riris' scrunchie production business, a Micro, Small, and Medium Enterprise (MSME) located in Waringin Kurung Village/Subdistrict, Serang Regency. This business has a production capacity of up to 200 pieces per month. Still, it lacks essential elements such as a brand identity, logo, and proper product packaging, relying solely on word-of-mouth marketing. Similarly, other creative industry businesses in Waringin Kurung Village/Subdistrict face challenges from limited knowledge and skills in utilizing information technology for business growth. This community service program aims to provide counseling and assistance to creative industry business actors to foster innovation in digital marketing. The program is implemented in several stages: initial socialization, training on innovative approaches relevant to the creative industry, and practical implementation. Activities include counseling, hands-on assistance, and website development to expand marketing reach. This initiative is expected to empower local businesses to improve their competitiveness and achieve sustainable growth by adopting digital marketing strategies.Industri kreatif merupakan sektor usaha yang sedang berkembang pesat dan banyak diminati karena mengandalkan keterampilan dan bakat yang dimilikinya untuk meningkatkan kesejahteraan dan menciptakan lapangan kerja. Salah satu contohnya adalah usaha produksi scrunchie milik Ibu Riris, sebuah Usaha Mikro Kecil dan Menengah (UMKM) yang berlokasi di Desa/Kecamatan Waringin Kurung, Kabupaten Serang. Usaha ini memiliki kapasitas produksi hingga 200 potong per bulan. Namun, usaha ini masih belum memiliki unsur-unsur penting seperti identitas merek, logo, dan kemasan produk yang baik, sehingga hanya mengandalkan pemasaran dari mulut ke mulut. Begitu pula dengan usaha industri kreatif lainnya di Desa/Kecamatan Waringin Kurung yang menghadapi kendala keterbatasan pengetahuan dan keterampilan dalam memanfaatkan teknologi informasi untuk pengembangan usaha. Program pengabdian masyarakat ini bertujuan untuk memberikan penyuluhan dan pendampingan kepada para pelaku usaha industri kreatif agar mampu berinovasi dalam pemasaran digital. Pelaksanaan program ini dilakukan melalui beberapa tahap, yaitu sosialisasi awal, pelatihan pendekatan inovatif yang relevan dengan industri kreatif, dan pelaksanaan praktik. Kegiatan yang dilakukan meliputi penyuluhan, pendampingan langsung, dan pengembangan situs web untuk memperluas jangkauan pemasaran. Inisiatif ini diharapkan dapat memberdayakan bisnis lokal untuk meningkatkan daya saing mereka dan mencapai pertumbuhan berkelanjutan dengan mengadopsi strategi pemasaran digital.
Diffusion and Relaxation Kinetics of Chitosan-graft-poly (Acrylic Acid) Hydrogels: A Theoretical and Experimental Study Jayanudin, Jayanudin; Lestari, Retno S. D.; Barleany, Dhena Ria; Pitaloka, Alia Badra; Yulvianti, Meri; Prasetyo, Dimas
World Chemical Engineering Journal VOLUME 8 NO. 2 DECEMBER 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v8i2.29920

Abstract

Hydrogels, as three-dimensional polymer networks, are extensively utilized due to their ability to absorb significant amounts of water while remaining insoluble. Chitosan-grafted poly(acrylic acid) hydrogels, in particular, combine high water absorption with improved mechanical properties, making them ideal for applications in agriculture and drug delivery. This study investigates the swelling kinetics of chitosan-graft-poly(acrylic acid) hydrogels synthesized with varying concentrations of the crosslinker N,N'-methylenebisacrylamide (MBA). The objective is to establish the relationship between crosslinker concentration and hydrogel performance by evaluating their swelling behavior using kinetic models. The hydrogels were prepared via free-radical polymerization, with MBA concentrations of 0.015 g (Hgel 1), 0.05 g (Hgel 2), and 0.1 g (Hgel 3). The research results indicate that swelling increases as the MBA concentration decreases. This was attributed to the lower crosslinking density, which reduces the entanglement of polymer chains. Hgel 1 displayed the greatest swelling ratio 171.71 g/g, while Hgel 2 150.21 g/g and Hgel 3 144.76 g/g. The research results indicate that the swelling behavior is best described by the diffusion kinetics model, as evidenced by the best fit between the experimental data and calculations, with R² values of 0.996, 0.996, and 0.984 for Hgel 1, Hgel 2, and Hgel 3, respectively. The applicability of pseudo-second order model, in good agreement with the one found for Hgel 2 (R2 = 0.997). These results suggest that diffusion dominates the swelling behaviour and that hydrogel behaviour is sensitive to crosslinker concentration. This work highlights the potential use of chitosan-graft-poly(acrylic acid) hydrogels for sustainable applications in agriculture and biomedicine.
Clustering student satisfaction using SERVQUAL and K-means methods Gunawan, Akbar; Wahyuni, Nuraida; Wibowo, Habibi Urfa; Fachrur, Aditya Rahadian; Khatili, Putiri Buana; Barleany, Dhena Ria
Jurnal Teknika Vol 20, No 2 (2024): Available Online in November 2024
Publisher : Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/tjst.v20i2.29060

Abstract

Student satisfaction is a critical indicator of higher education service quality. Higher education institutions must maintain student satisfaction to ensure service quality. This study measures and analyzes student satisfaction at higher education institutions using the SERVQUAL model to inform service improvement strategies. A survey assessed five key service dimensions: Tangibles, Reliability, Responsiveness, Assurance, and Empathy. Gap analysis and non-hierarchical K-means clustering identified six student groups with varying satisfaction levels. Cluster 1, with an average gap score of -3.00 and a Customer Satisfaction Index (CSI) of 65.68%, was categorized as 'less satisfied' and prioritized for improvement. Importance Performance Analysis (IPA) identified critical service attributes. Improvement strategies; developed using the 5W+1H framework (Who, What, Where, When, Why, and How); emphasize enhanced communication, faster service delivery, strengthened employee competencies, and a student-centered organizational culture. These findings provide a robust foundation for strategic decision-making to enhance service quality in higher education institutions.
Co-Authors Aditya Rahadian Fachrur Anggoro, Dendy Vito Gunawan, Akbar Harly Demustila Jayanudin Jayanudin Jayanudin, Jayanudin Khairunnisa, Zahra Khatili, Putiri Buana Lestari, Retno S. D. Lestari, Retno Sulistyo D. Pitaloka, Alia Badra Prasetyo, Dimas Putri, Ardini Ruhiatna, Adam Wahyuni, Nuraida Wibowo, Habibi Urfa Yulianto, Amin Yulvianti, Meri