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All Journal Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran Jurnal Inovasi Teknik Kimia
Sari Purnavita
Politeknik Katolik Mangunwijaya Semarang
Chemical Engineering, Chemistry & Bioengineering Engineering

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PEMBUATAN SABUN MANDI PADAT BERBASIS MINYAK SAWIT BEKAS DENGAN AROMA SEREH Rahel - Margareta; Sari Purnavita; Lucia Hermawati
Jurnal Inovasi Teknik Kimia Vol 7, No 2 (2022)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v7i2.6440

Abstract

Sabun merupakan sediaan pembersih kulit yang dibuat daari proses saponifikasi dengan mereaksikan minyak, lemak, wax, rosin, atau asam lemak dengan basa. Alkali yang digunakan adalah NaOH karena NaOH adalah jenis alkali yang larut dalam air yang dapat membentuk produk menjadi sabun yang keras. Tujuan penelitian ini adalah mengkaji konsentrasi larutan NaOH yang digunakan dan kualitas minyak sawit bekas penggorengan terhadap karakteristik sabun padat yang dihasilkan. Penelitian ini menggunakan dua variabel bebas yaitu variabel bebas pertama adalah konsentrasi larutan NaOH (25g, 27,5g, 30g, 32,5g, dan 35g). Variabel bebas kedua adalah kualitas minyak sawit bekas penggorengan (1 kali, 2 kali, 3 kali, 4 kali, dan 5 kali penggorengan). Hasil penelitian terbaik diperoleh pada perlakuan minyak dengan kualitas penggorengan 3 kali dengan jumlah kadar air maksimal 15%. 
Manufacture Bioplastic Composite made of Corn Starter and Poly Vinyl Alcohol with the Addition of Beeswax Aditya Prian Ramadhan; Sari Purnavita; Lucia Hermawati Rahayu
Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 20, No 1 (2022): July 2022
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v20i1.37275

Abstract

Bioplastics are environmentally friendly plastics that naturally can be easily degraded. One of the natural ingredients that can be used is corn starch. This study aims to study the effect of heating temperature and the addition of beeswax on the characteristics of bioplastics. This study used two independent variables. This study used the heating temperature of the material at 60-80 °C and the addition of beeswax up to 2% of the total weight. The amount of poly vinyl alcohol and corn starch was dissolved in water and further to the plasticizer in glycerol with heating time. The characteristics to be obtained are the properties of bioplastics that have been synthesized against water resistance, tensile strength, and elongation tests. The lowest heating temperature of 60 °C had a minor water absorption of 42.85%. At a heating temperature of 65 °C, it gives the highest tensile strength and elongation, respectively, 5.15 Mpa and 29.39%. The addition of beeswax affects water resistance, tensile strength, elongation, and biodegradation values. Water resistance will be higher with the addition of beeswax. In addition to 2 g of beeswax, bioplastics have the highest tensile strength value, and elongation was obtained, respectively, 9.55 Mpa and 31.54%.
Co-Authors Aditya Prian Ramadhan Lucia Hermawati Lucia Hermawati Rahayu Rahel - Margareta