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All Journal Jurnal Spektra Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE)
Yeyen Nurhamiyah, Yeyen
Universitas Indonesia
Agriculture, Biological Sciences & Forestry Engineering Immunology & microbiology Industrial & Manufacturing Engineering Mechanical Engineering Physics

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KARAKTERISASI MASKER TERMOPLASTIK SEBELUM DAN SESUDAH RADIASI Nurhamiyah, Yeyen; L. Juwono, Ariadne; Soejoko, Djarwani S.
Jurnal Spektra Vol 15, No 2 (2014): Spektra: Jurnal Fisika dan Aplikasinya
Publisher : Jurnal Spektra

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Masker fiksasi dipakai pada radioterapi sebagai salah satu alat bantu agar pasien tidak bergerak selama proses radioterapi. Masker fiksasi ini biasanya diimpoor dari luar negeri tanpa tahu kandungan bahan di dalamnya.Oleh karena itu, pada penelitian ini, bahan masker fiksasi bekas pasien radioterapi dianalisa untuk diketahui jenis polimer penyusunnya. Dengan melakukan serangkaian pengujian yakni pengukuran massa jenis, X-Ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR), Energy Dispersive X-Ray Spectrometry (EDAX) diketahui bahwa bahan masker fiksasi adalah polimer termoplastik Polycaprolactone. Dari hasil pengujian XRD didapat jika masker fiksasi memiliki system Kristal ortorombik dengan parameter kisi yang sedikit berbeda pada bahan yang terkena radiasi dan yang tidak terkena radiasi. Selain itu dari hasil pengujian diketahui bahwa pemakaian terus-menerus pada masker fiksasi tidak begitu mempengaruhi sifat fisik material ini. Walaupun demikian pada pengujian FTIR menunjukkan jika pada bagian bahan yang mendapat radiasi secara terus menerus akan membuat gugus –CH3 menghilang dan membentuk gugus =CH2. Kata Kunci : Fiksasi, Radioterapi, Polycaprolactone.
Characterization of sheet organic mulch produced from coconut fiber, water hyacinth, and banana pseudostem fiber combinations Harahap, Nur Anisah Rizky; Nurhamiyah, Yeyen; Dewi, Ika Atsari; Jung, Young Hoon; Hamzah, Muhammad Hazwan bin; Rohma, Novita Ainur; Samudra, Rizki Putra; Pratama, Andhika Putra Agus; Lee, Yeon Ju; Suhartini, Sri
Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE) Vol 8, No 3 (2025)
Publisher : Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.afssaae.2025.008.03.9

Abstract

This study developed a sheet-type organic mulch from coconut fiber, banana pseudostem, and water hyacinth without synthetic additives through drying, alkaline pretreatment in 1% NaOH solution for 30 minutes, pulping, molding, and oven-drying at 50 °C for 72 hours. The products were characterized for physical, mechanical, and chemical properties, including moisture and ash contents, water absorption capacity, tensile strength, and proximate, lignocellulosic, CNPK, FTIR, and SEM-EDX analyses. The raw materials showed distinct compositions: coconut fiber was rich in lignin (27.52%) and cellulose (37.87%), banana pseudostem had the highest hemicellulose (36.25%), and water hyacinth contained the greatest protein content (16.74%). Among treatments, M3P3 (70% coconut fiber: 30% banana pseudostem) exhibited the highest water absorption capacity (257.00%), while P1 (100% banana pseudostem) achieved the highest tensile strength (9.97 N). In contrast, E1 (100% water hyacinth) showed the highest moisture content (8.83%) but the lowest tensile strength (5.11 N). FTIR and SEM-EDX results confirmed the presence of hydroxyl and carbonyl functional groups and a porous surface morphology, supporting water retention and nutrient release. Overall, the composite mulch demonstrated eco-friendly, economical, and adaptive properties suitable for sustainable tropical agriculture applications.
Enhancing Sustainability in Packaging: Response Surface Optimized Sago Pith Waste Biocomposites with PBAT and MDI Irmayanti, Maya; Nurjanah, Sarifah; Abdullah, Akbar Hanif Dawam; Nissa, Rossy Choerun; Nurhamiyah, Yeyen
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 3 (2025): June 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i3.979-990

Abstract

This study aims to optimize the biocomposites of sago pith waste (SPW) for sustainable packaging applications. The biocomposite was prepared using the biodegradable polymer polybutylene adipate-co-terephthalate (PBAT) as a matrix and methylendifenyl diisocyanate (MDI) as a chain extender. RSM-CCD was used to assess the impact of the incorporation of SPW (5-20% p/p) and MDI (1–5%) into the PBAT matrix on the tensile strength and elongation of biocomposites by melt mixing. The optimal formula shown by RSM was 5% SPW and 5% MDI, which resulted in a 5.14 MPa tensile strength and 8.14% elongation. The barrier properties of all treatments, including moisture content, contact angle, and water absorption, were checked. The optimal formula showed good barrier properties compared to other treatments: water content of 3.12%, contact angle of 42.84°, and water absorption of 0.82%. Other characterizations of SEM, FTIR, DSC, TGA, and biodegradability tests showed an increase in SPW-PBAT compatibility due to the use of MDI. MDI as a chain extender had a positive impact on the material's strength, and the addition of SPW accelerated the degradation process, thus improving biodegradability. Keywords: Biocomposite, Chain extender, Melt-mixing, Response Surface Methodology, Sago pith waste.
Co-Authors Akbar Hanif Dawam Abdullah, Akbar Hanif Dawam Ariadne L. Juwono, Ariadne Djarwani S. Soejoko Hamzah, Muhammad Hazwan bin Harahap, Nur Anisah Rizky Ika Atsari Dewi Irmayanti, Maya Jung, Young Hoon Lee, Yeon Ju Nissa, Rossy Choerun Pratama, Andhika Putra Agus Rohma, Novita Ainur Samudra, Rizki Putra Sarifah Nurjanah Sri Suhartini