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All Journal Jurnal Inspirasi Pendidikan Walisongo Journal of Chemistry
Zidni Azizati
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Chemistry Education

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Comparison of The Use of Glycerol and Sorbitol as Plasticizers on The Quality of Bioplastics Based on Cellulose-Chitosan Qolbi, Nur Nisa Aeni; Zidni Azizati; Ika Nur Fitriani
Walisongo Journal of Chemistry Vol. 7 No. 2 (2024): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v7i2.24175

Abstract

The accumulation of plastic waste poses significant environmental and health problems. One effort to mitigate this issue is the development of bioplastics. Correspondingly, the primary materials used in this research were cellulose from teak (Tectona grandis) wood powder, chitosan, glycerol, and sorbitol. This study aimed to compare the effectiveness of glycerol and sorbitol as plasticizers. Glycerol is considered cost-effective, renewable, biodegradable, and environmentally friendly, while sorbitol, which is also non-toxic and naturally abundant, can enhance product durability by inhibiting water evaporation. Both materials exhibit good potential as plasticizers; therefore, their comparison is necessary. The research stages included extracting cellulose from teak wood powder, synthesizing cellulose-chitosan-glycerol and cellulose-chitosan-sorbitol bioplastics, and characterizing the resulting materials. The results exhibited the presence of functional groups such as –OH, C-H, and C-O, which were typical of cellulose, as well as N-H groups, characteristic of chitosan. The best quality for glycerol-based bioplastics was achieved with the addition of 0.5 mL of glycerol, yielding a tensile strength of 5.79 MPa, elongation of 10.3%, water absorption of 43.43%, and a degradation time of 17 days. For sorbitol-based bioplastics, the best quality was obtained with the addition of 1 mL of sorbitol, resulting in a tensile strength of 6.23 MPa, elongation of 13.7%, water absorption of 67.46%, and a degradation time of 14 days. Based on these results, sorbitol is more recommended than glycerol as a plasticizer in this study.
Comparison of The Use of Glycerol and Sorbitol as Plasticizers on The Quality of Bioplastics Based on Cellulose-Chitosan Qolbi, Nur Nisa Aeni; Zidni Azizati; Ika Nur Fitriani
Walisongo Journal of Chemistry Vol. 7 No. 2 (2024): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v7i2.24175

Abstract

The accumulation of plastic waste poses significant environmental and health problems. One effort to mitigate this issue is the development of bioplastics. Correspondingly, the primary materials used in this research were cellulose from teak (Tectona grandis) wood powder, chitosan, glycerol, and sorbitol. This study aimed to compare the effectiveness of glycerol and sorbitol as plasticizers. Glycerol is considered cost-effective, renewable, biodegradable, and environmentally friendly, while sorbitol, which is also non-toxic and naturally abundant, can enhance product durability by inhibiting water evaporation. Both materials exhibit good potential as plasticizers; therefore, their comparison is necessary. The research stages included extracting cellulose from teak wood powder, synthesizing cellulose-chitosan-glycerol and cellulose-chitosan-sorbitol bioplastics, and characterizing the resulting materials. The results exhibited the presence of functional groups such as –OH, C-H, and C-O, which were typical of cellulose, as well as N-H groups, characteristic of chitosan. The best quality for glycerol-based bioplastics was achieved with the addition of 0.5 mL of glycerol, yielding a tensile strength of 5.79 MPa, elongation of 10.3%, water absorption of 43.43%, and a degradation time of 17 days. For sorbitol-based bioplastics, the best quality was obtained with the addition of 1 mL of sorbitol, resulting in a tensile strength of 6.23 MPa, elongation of 13.7%, water absorption of 67.46%, and a degradation time of 14 days. Based on these results, sorbitol is more recommended than glycerol as a plasticizer in this study.
Analisis Miskonsepsi IPA Materi Atom, Ion, dan Molekul terhadap Siswa Kelas 8 Menggunakan Instrumen Three-Tier Maulida, Nurul Isnaini; Zidni Azizati
Jurnal Inspirasi Pendidikan Vol 15 No 2 (2025): Agustus 2025
Publisher : Fakultas Ilmu Pendidikan Universitas PGRI Kanjuruhan Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21067/jip.v15i2.12251

Abstract

Tujuan dari diadakannya penelitian ini adalah untuk menganalisis soal yang termasuk miskonsepsi dengan materi atom, ion, dan molekul menggunakan instrumen three-tier dengan jumlah 25 soal. Keuntungan dari penggunaan instrumen soal three tier yaitu saat menjawab soal peserta didik dapat dikategorikan manakan peserta didik yang tergolong miskonsepsi, paham konsep, tidak paham konsep, dan hanya menebak saja. Selain itu guru juga dapat mengetahui soal manakan yang perlu adanya penekanan materi lebih lanjut. Penelitian dilakukan di SMP 2 Jekulo pada kelas 8 dengan jumlah siswa yang mengerjakan soal adalah 31 siswa. Penelitian ini menggunakan metode penelitian deskriptif kualitatif. Jumlah jawaban keseluruhan ada 775 jawaban terdapat 245 dengan persentase 31,61% dikategorikan miskonsepsi, 282 jawaban dengan persentase 36,39% dikategorikan tidak paham konsep, berjumlah 191 jawaban dengan persentase 24,65% dikategorikan paham konsep, dan 57 jawaban dengan persentase 7,35% dikategorikan hanya menebak. Setelah dilakukan penelitian dapat diketahui bahwa miskonsepsi pada peserta didik bisa saja terjadi karena kesalahan saat memahami konsep yang sebenarnya. Kebanyakan peserta didik menjawab salah pada bagian pertanyaan dan juga alasannya tetapi mereka menjawabnya dengan penuh keyakinan. Mereka mengalami kesalahpahaman konsep dalam menerima materi terkait. Miskonsepsi pada siswa kebanyakan terjadi pada materi menentukan proton, elektron, dan neutron.
Co-Authors Ika Nur Fitriani Maulida, Nurul Isnaini Qolbi, Nur Nisa Aeni