PENGARUH VARIASI KOMPOSISI POLYLACTIC ACID DAN FILLER KULIT SINGKONG TERHADAP SIFAT MEKANIK DAN LAJU BIODEGRADASI

Aris Al Nur Rachman; Andita Nataria Fitri Ganda; Dewi Puspitasari

doi:10.51510/sinergipolmed.v7i1.3037

Authors

Aris Al Nur Rachman Program Studi Teknik Mesin, Universitas Negeri Surabaya, Jl. Ketintang, Ketintang, Kec. Gayungan, Kota Surabaya, Jawa Timur 60231, Indonesia
Andita Nataria Fitri Ganda Program Studi Teknik Mesin, Universitas Negeri Surabaya, Jl. Ketintang, Ketintang, Kec. Gayungan, Kota Surabaya, Jawa Timur 60231, Indonesia
Dewi Puspitasari Program Studi Teknik Mesin, Universitas Negeri Surabaya, Jl. Ketintang, Ketintang, Kec. Gayungan, Kota Surabaya, Jawa Timur 60231, Indonesia

DOI:

https://doi.org/10.51510/sinergipolmed.v7i1.3037

Keywords:

Bioplastik, kulit singkong, polylactic acid, Biodegradasi, kekuatan tarik

Abstract

Permasalahan limbah plastik yang sulit diatasi mendorong pencarian material yang lebih ramah lingkungan, dengan bioplastik yang terbuat dari Polylactic acid (PLA) dan penambahan filler organik dari kulit singkong. Tujuan penelitian ini adalah untuk menentukan bagaimana rasio PLA dan pati kulit singkong yang berbeda memengaruhi karakteristik mekanik dan seberapa cepat bioplastik yang dihasilkan terurai. Desain eksperimental menggunakan empat campuran berbeda, dengan menggunakan pengisi kulit singkong pada kadar 0%, 10%, 20%, dan 30%. Proses pembuatannya melibatkan pencampuran dan pembentukan menggunakan cetakan injeksi, sedangkan evaluasinya meliputi penilaian kekuatan tarik sesuai dengan ASTM D638 dan pengujian biodegradasi di tanah selama empat minggu. Menurut temuan, keberadaan pengisi secara nyata memengaruhi kekuatan saat ditarik, fleksibilitas, dan seberapa jauh material tersebut dapat meregang. Campuran yang mengandung 30% pengisi menunjukkan sifat mekanik yang paling baik, dengan kekuatan tarik 67,24 MPa, modulus elastisitas 123,66 MPa, dan elongasi 6,33%. Mengenai biodegradasi, sampel dengan 30% pengisi menunjukkan penurunan berat terbesar, yaitu 14%, jauh lebih besar daripada PLA murni, yang hanya terurai sekitar 3,4%. Bioplastik yang terbuat dari PLA dan kulit singkong menunjukkan potensi sebagai material berkelanjutan, menunjukkan sifat mekanik yang sesuai dan laju degradasi yang lebih cepat, sehingga layak untuk dikembangkan lebih lanjut sebagai alternatif plastik konvensional.

References

(IUCN), I. U. for C. of N. (2025). Plastic Pollution: IUCN Issues Brief. IUCN. https://iucn.org/resources/issues-brief/plastic-pollution

Abe, M. M., Martins, J. R., Sanvezzo, P. B., Macedo, J. V., Branciforti, M. C., Halley, P., Botaro, V. R., & Brienzo, M. (2021). Advantages and disadvantages of bioplastics production from starch and lignocellulosic components. Polymers, 13(15).

Ahsan, W. A. (2023). Biodegradation of Different Types of Bioplastics through Composting: A Recent Trend in Green Recycling. Catalysts, 13(2), 294.

Assaajidah, A., Susanti, E., Saputra, I. K., Terapan, D. S., & Malang, U. N. (2025). Eksplorasi pati dari limbah kulit singkong sebagai sumber karbon alternatif media pertumbuhan rhizopus oligosporus saito. 11, 41–51.

Dobrosielska, M. (2024). The Influence of Environmental Factors on the Degradation of Polylactic Acid (PLA). Frontiers in Environmental Science, 11, 111.

Gutberlet, J. (2023). Global Plastic Pollution and Informal Waste Pickers. Cambridge Prisms: Plastics, 1–38.

Hasmadi, M., Harlina, L., Jau-Shya, L., Mansoor, A. H., Jahurul, M. H. A., & Zainol, M. K. (2021). Extraction and characterisation of Cassava starch cultivated in different locations in Sabah, Malaysia. Food Research, 5(3), 44–52.

Hussain, M., Khan, S. M., Shafiq, M., & Abbas, N. (2024). A review on PLA-based biodegradable materials for biomedical applications. Giant, 18.

Jiya, J. Y., Mu’azu Abubakar, Adekunle Joseph, I., C. Egwim, E., & Obanimomo, K. (2024). Thermal Stability, Transparency, and Water Sensitivity Properties of Bleached, Cross-Linked Cassava Starch Film. Journal of Digital Food, Energy & Water Systems, 5(1), 34–44.

Kalita, N. K. (2021). Biodegradation and characterization study of compostable bioplastics. Science Progress, 104(2), 003685042110046.

Kibria, M. G., Masuk, N. I., Safayet, R., Nguyen, H. Q., & Mourshed, M. (2023). Plastic Waste: Challenges and Opportunities to Mitigate Pollution and Effective Management. In International Journal of Environmental Research (Vol. 17, Issue 1). Springer International Publishing.

Kusumawati, R., Syamdidi, Abdullah, A. H. D., Nissa, R. C., Firdiana, B., Handayani, R., Munifah, I., Dewi, F. R., Basmal, J., & Wibowo, S. (2025). Physical Properties of Biodegradable Chitosan-Cassava Starch Based Bioplastic Film Mechanics. Science and Technology Indonesia, 10(1), 191–200.

Li, G., Zhao, M., Xu, F., Yang, B., Li, X., Meng, X., Teng, L., Sun, F., & Li, Y. (2020). Synthesis and Biological Application of Polylactic Acid. Molecules, 25(21).

LookPolymers. (2025). Overview of Materials for Polystyrene Heat Resistant Grade. LookPolymers. https://www.lookpolymers.com/polymer_Overview-of-materials-for-Polystyrene-Heat-Resistant-Grade.php?utm

Martinaud, E., Hierro-Iglesias, C., Hammerton, J., Hadad, B., Evans, R., Sacharczuk, J., Lester, D., Derry, M. J., Topham, P. D., & Fernandez-Castane, A. (2024). Valorising Cassava Peel Waste Into Plasticized Polyhydroxyalkanoates Blended with Polycaprolactone with Controllable Thermal and Mechanical Properties. Journal of Polymers and the Environment, 32(8), 3503–3515.

Mironov, V. (2024). Degradation of high concentrations of commercial polylactic acid (PLA) in composting conditions. Science of the Total Environment, 876, 162681.

Naomi Nova Mies, & Awin Mulyati. (2025). Pemanfaatan Limbah Kulit Singkong Sebagai Plastik Ramah Lingkungan Untuk Mengatasi Pencemaran Akibat Plastik Polimer. Student Research Journal, 3(1), 26–36.

Naser, A. Z., Deiab, I., & Darras, B. M. (2021). Poly(lactic acid) (PLA) and polyhydroxyalkanoates (PHAs), green alternatives to petroleum-based plastics: a review. RSC Advances, 11(28), 17151–17196.

Nazari, W. A. A. W., & Aziz, A. A. (2020). International Journal of Applied Science and Engineering Review. International Journal of Applied Science and Engineering Review, 1(6), 1–5.

Oliver, J. (2019). Pembuatan Bioplastik dari Pati Kulit Singkong (Manihot esculenta) Berpengisi Mikrokristalin Selulosa AvicelPH-101 (Wood pulp) dengan Plastisizer Sorbitol. Hilos Tensados, 1.

Picar, A. E., Molina, B. I., Dejuras, J. F., Veran, M. J., & Estrellado, J. R. (2025). Valorization of Cassava Peel and Shrimp Shell Waste for Bioplastic Film Development: Extraction, Characterization, and Response Modeling. International Journal of Multidisciplinary: Applied Business and Education Research, 6(6), 3018–3044.

Prata, J. C., Patr, A. L., Mouneyrac, C., Walker, T. R., Duarte, A. C., & Rocha-santos, T. (2019). Solutions and Integrated Strategies for the Control and Mitigation of Plastic and Microplastic Pollution. International Journal of Environmental Research and Public Health, 16(2411), 1–19.

Ranakoti, L., Gangil, B., Misha, S. K., Singh, T., Sharma, S., A., I. R., & El-khatib, S. (2022). Critical Review on Polylactic Acid : Properties , Structure. Materials, 15(4312), 1–29.

Rudnik, E. (2008). Compostable Polymer Materials. In Compostable Polymer Materials.

Şen, İ., & Sever, K. (2025). Production and characterization of agricultural waste natural fiber-filled polylactic acid composites. Polymer Bulletin, 82(9), 4051–4074.

Setyarini, P. H., Hidayati, F. A., Dhinasty, D. I., Wahyudi, S., & Sulistyarini, D. H. (2023). Effective Tensile Energy Absorption of Chitosan-Poly Lactic Acid Composite using Injection Molding Process. 71(5), 182–190.

Shafqat, A., Al-Zaqri, N., Tahir, A., & Alsalme, A. (2021). Synthesis and characterization of starch based bioplatics using varying plant-based ingredients, plasticizers and natural fillers. Saudi Journal of Biological Sciences, 28(3), 1739–1749.

Shao, L., Xi, Y., & Weng, Y. (2022). Recent Advances in PLA-Based Antibacterial Food Packaging and Its Applications. Molecules, 27(18). https://doi.org/10.3390/molecules27185953

Sobeih, M. O., Sawalha, S., Hamed, R., Ali, F., & Kim, M. P. (2025). Starch-Derived Bioplastics: Pioneering Sustainable Solutions for Industrial Use. Materials, 18(8), 1–32.

Tomasek, S., Miskolczi, N., Nagy, B., & T, F. (2023). Industrial Crops & Products Vegetable oil based additives to enhance the properties of PLA / Starch composites : The effect of reaction parameters ¨ r o. 191(November 2022).

Usni, A., Karo-Karo, T., & Yusraini, E. (2016). Pengaruh Edible Coating Berbasis Pati Kulit Ubi Kayu terhadap Kualitas dan Umur Simpan Buah Jambu Biji Merah pada Temperatur Kamar. Jurnal Rekayasa Pangan Dan Pertanian, 4(3), 293–303.

Wahyuningtyas, D., Dwi Sukmawati, P., Muthia, D. N., & Fitria, A. (2019). Prosiding Seminar Nasional Teknik Kimia “Kejuangan” Optimasi Pembuatan Plastik Biodegradable dari Pati Kulit Singkong dengan Penambahan Asam Sitrat Sebagai Crosslinking Agent. April, 1–8.

Wang, S., Shen, Q., Guo, C., & Guo, H. (2021). Comparative study on water vapour resistance of poly(Lactic acid) films prepared by blending, filling and surface deposit. Membranes, 11(12).

Yang, T., Sun, G., Sun, M., Du, H., Luo, Z., Feng, Q., Zheng, Y., Zhou, J., & Long, Z. (2025). Effects of Lime, Magnesia and Silicon on Soil Acid-Neutralizing Capacity and Rice Yield in Acidic Paddy Fields. Agriculture (Switzerland), 15(10), 1–13.

Yao, X., Yang, X., Lu, Y., Qiu, Y., & Zeng, Q. (2025). Review of the Synthesis and Degradation Mechanisms of Some Biodegradable Polymers in Natural Environments. Polymers, 17(1), 1–21.

Yu, W., Gu, J., Li, Z., Ruan, S., Chen, B., Shen, C., Lee, L. J., & Wang, X. (2023). Study on the Influence of Microinjection Molding Processing Parameters on Replication Quality of Polylactic Acid Microneedle Array Product.

ZwickRoell. (2025). ASTM D638: sifat tarik plastik | ZwickRoell. ZwickRoell. https://www.zwickroell.com/id/industri/plastik/bahan-cetakan-termoplastik-dan-termosetting/sifat-tarik-astm-d638/