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All Journal Jurnal BETA (Biosistem dan Teknik Pertanian) Teknotan: Jurnal Industri Teknologi Pertanian Jurnal Keteknikan Pertanian Jurnal Teknologi Pertanian agriTECH Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat Pro Food Jurnal Sains Teknologi dan Lingkungan (JSTL) WIDYABHAKTI Jurnal Ilmiah Populer Jurnal Pengabdian Magister Pendidikan IPA Jurnal Teknologi Pertanian Andalas Jurnal Abdi Insani Jurnal Ilmiah Abdi Mas TPB Unram Jurnal Agro Dedikasi Masyarakat (JADM) Prosiding Konferensi Nasional PKM-CSR Makara Journal of Technology Jurnal Pepadu Jurnal Rekayasa elektrika Jurnal Wicara Desa
Kurniawan Yuniarto
Universitas Mataram
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Journal : Makara Journal of Technology

 1 
Thermal Properties, Crystallinity, and Oxygen Permeability of Na-montmorillonite Reinforced Plasticized Poly(lactic acid) Film Yuniarto, Kurniawan; Purwanto, Yohanes Aris; Purwanto, Setyo; Welt, Bruce A.; Purwadaria, Hadi Karia; Sunarti, Titi Candra
Makara Journal of Technology Vol. 20, No. 1
Publisher : UI Scholars Hub

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Introducing unmodified organically clay/Na-montmorillonite (Na-MMT) was applied into plasticized poly(lactic acid) PLA to produce film composites by direct casting. Film composite structure, the crystallinity degree and form, and thermal properties were carried out using X-ray diffraction and differential scanning calorimetry. The effect of Na- MMT to the tortuous path and the crystallinity degree in the plasticized film composites were calculated in oxygen barrier properties. Chromatogram film composites resulted in an intercalated structure that showed peak diffraction angle shift at about 0.2o. Then, a peak diffraction pattern was indicated in α-form crystal structure. Plasticized PLA has a crystallinity degree at 34%, and the addition of Na-MMT increased to 52%. Glass transition temperature improved from 53 °C to 57 °C, and melting temperature remained stable at 167 °C. Filling Na-MMT into plasticized PLA caused to enhance a tortuous path about 28% and improved the oxygen permeability to 80%. As a result, the addition of Na- MMT of 3% into plasticized PLA during film composite preparation using the mixing method resulted in balancing properties related to the crystallinity degree, thermal properties, and oxygen barrier properties.
Ascorbic Acid Degradation in Cut Lemon Packaged Using Oxygen Scavenging Active Film During Storage Yuniarto, Kurniawan; Purwanto, Setyo; Welt, Bruce Ari; Lastriyanto, Anang
Makara Journal of Technology Vol. 22, No. 3
Publisher : UI Scholars Hub

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Oxygen scavenging active film can be used to prevent diffusion of free oxygen due to the action of permeation mechanism. In this study, biodegradable oxygen scavenging plastic film was designed by incorporating an antioxidant agent into plasticized polylactic acid or PLA-PEG (PPLA). Butylated hydroxytoluene (BHT) was added at different concentrations into the matrix of the PPLA film using a direct casting method to produce oxygen scavenging active film. The antiradical activity of the oxygen scavenging active film was observed, which could be applied for preventing vitamin C degradation in cut lemon during storage. The antiradical activity of the active film composite reduced after 4 days of storage at 28 °C. Initial antiradical activities were measured at 99.90%–99.91% after introducing 1%, 5%, and 10% concentrations of BHT into the matrix of the PPLA film. DPPH analysis indicated that a larger concentration of BHT exhibited higher antiradical activity after 4 days of storage surrounded with free oxygen. The final antiradical activities were 35.45%, 54.56%, and 81.65% at 1%, 5%, and 10% BHT concentrations, respectively. Therefore, incorporating a higher BHT fraction into the oxygen scavenging active film composite can certainly prevent the oxidation of cut lemon. The respective final vitamin C levels were 13.5%, 20.6%, and 22.5% after 4 days of storage.
Co-Authors Ahmad Alamsyah Ahmada Mu’ammar Aksan Mujahalyt Alfi Mawadah Anang Lastriyanto Ansar Ansar Ansar Ansar Ansar Ansar Aqidah, Fitratul Ariessaputra, Suthami Aris Purwanto Azhar, Khaerul Bruce A. Welt, Bruce A. Budi Darmawan Budi Darmawan Dewi, Desak Made Devika Ratna Dony Firmansyah Edwin Eka Hartono Fakhrul Irfan Khalil Fuadi, Mi'raj Hadi Karia Purwadaria, Hadi Karia Hadi, Risman Halimatul Ulfa Ru'ya' Hary Kurniawan Hidayat, Agriananta Fahmi Husnan Hadi Ichsan, Andi Chairil Joko Priyono Joko Sumarsono Kabila, Enang Kurniawan, Hary Kurniawan, Hary Lalu Arioki Setiadi M Junaidi M. Alfi Ashabana Mawadah, Alfi Mawaddah, Atika Ma’wa, Miftahil Mi’raj Fuadi Muhamad Ihsan Febriyanto Mbele Muhammad Afrizal G. Rasyda Murad, Murad Murad, Murad Mustafid, Azhar Mutia Devi Ariyana, Mutia Devi Muvianto, Cahyo Mustiko Okta Nurliah Buhari Nurtiti Nurtiti Permadi, Farid Rahmat Sabani Rahmawati, Nadia Raisa, Daeva Rasyda, Muhammad Afrizal G. Ru'ya', Halimatul Ulfa Selly Oktavianti Setyo Purwanto Sri Maryati Sri Widyastuti Sudi Mariyanto Al Sasongko Sukmawaty Sukmawaty Sukmawaty Sukmawaty, Sukmawaty Supriyadin, Deden Surya Abdul Muttalib, Surya Abdul Susi Rahayu Syafaruddin Ch Titi Candra Sunarti Trialgi, Muhammad Rasyad Wahyuni, Tina Welt, Bruce Ari Yesica Marcelina Romauli Sinaga Zahara, Dwi