Application Study Of Cellulose Biomaterial Derived From Green Algae As An Alternative Energy Source For Low Power Microsensors And Mini Transducers

Bahari, Muhammad Rayhand Putra (2026) Application Study Of Cellulose Biomaterial Derived From Green Algae As An Alternative Energy Source For Low Power Microsensors And Mini Transducers. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

The increasing demand for sustainable energy sources has accelerated the development of energy harvesting technologies capable of converting mechanical energy into electrical energy for low-power electronic devices. Conventional piezoelectric materials, such as Lead Zirconate Titanate (PZT), exhibit excellent electrical performance but contain toxic lead, creating a need for environmentally friendly alternatives. This study evaluates the potential of cellulose biomaterials extracted from the green algae Ulva lactuca as piezoelectric materials for low-power microsensor and miniature transducer applications. The research involved cellulose extraction and purification using different NaOH concentrations (10%, 15%, and 17.5%), fabrication of cellulose films, ZnO reinforcement, PZT integration, and electrical performance evaluation under repeated mechanical loading. The electrical output was characterized by measuring the generated voltage and current under different material compositions. The results indicate that NaOH concentration significantly influences the electrical performance of cellulose films, with the 17.5% NaOH treatment producing the highest electrical output. ZnO addition improved the mechanical properties and electrical stability up to an optimum composition, while PZT integration significantly enhanced both voltage and current compared with cellulose films without PZT. Furthermore, energy storage using a capacitor improved the stability of the generated electrical output. Overall, cellulose biomaterials derived from Ulva lactuca demonstrate promising potential as environmentally friendly piezoelectric materials for low-power energy harvesting applications, particularly in microsensors and miniature transducers.
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Kebutuhan akan sumber energi berkelanjutan mendorong pengembangan teknologi energy harvesting yang mampu mengubah energi mekanik menjadi energi listrik untuk memasok perangkat berdaya rendah. Material piezoelektrik konvensional seperti Lead Zirconate Titanate (PZT) memiliki performa tinggi, namun mengandung timbal yang bersifat toksik sehingga diperlukan alternatif yang lebih ramah lingkungan. Penelitian ini bertujuan mengevaluasi potensi biomaterial selulosa yang diekstraksi dari alga hijau Ulva lactuca sebagai material piezoelektrik untuk aplikasi mikrosensor dan mini transduser berdaya rendah. Proses penelitian meliputi ekstraksi dan pemurnian selulosa menggunakan variasi konsentrasi NaOH (10%, 15%, dan 17,5%), pembuatan film selulosa, penambahan ZnO sebagai material penguat, integrasi dengan PZT, serta pengujian keluaran listrik menggunakan mekanisme pembebanan mekanik berulang. Parameter yang dianalisis meliputi tegangan dan arus listrik yang dihasilkan pada setiap variasi perlakuan. Hasil penelitian menunjukkan bahwa variasi konsentrasi NaOH berpengaruh terhadap performa listrik film selulosa, dengan konsentrasi 17,5% menghasilkan karakteristik keluaran yang paling baik dibandingkan konsentrasi lainnya. Penambahan ZnO meningkatkan kekuatan mekanik dan kestabilan keluaran listrik hingga komposisi optimum tertentu, sedangkan integrasi dengan PZT menghasilkan peningkatan tegangan dan arus yang signifikan dibandingkan film selulosa tanpa PZT. Penyimpanan energi menggunakan kapasitor juga mampu meningkatkan kestabilan keluaran listrik. Hasil penelitian menunjukkan bahwa biomaterial selulosa dari Ulva lactuca memiliki potensi sebagai material piezoelektrik ramah lingkungan untuk sistem energy harvesting berdaya rendah, khususnya pada aplikasi mikrosensor dan mini transduser.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Cellulose biomaterial, Microsensor, PZT, Ulva lactuca, ZnO, Biomaterial Selulosa, Mikrosensor
Subjects:	Q Science Q Science > QD Chemistry Q Science > QD Chemistry > QD181.Z6 Zinc oxide Q Science > QD Chemistry > QD320 Cellulose. Hydrolysis V Naval Science > V Naval Science (General) V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM471 Ships--Electric equipment V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM773 Ship propulsion, Electric
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User:	Muhammad Rayhand Putra Bahari
Date Deposited:	03 Aug 2026 15:42
Last Modified:	03 Aug 2026 15:42
URI:	http://repository.its.ac.id/id/eprint/142556

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