PENGARUH PENAMBAHAN EKSTENDER TERHADAP LIGNIN FENOL FORMALDEHID DARI SABUT KELAPA (Cocos nucifera) SEBAGAI ADHESIVE KAYU RAMAH LINGKUNGAN

Anita Nur Octavia, . (2021) PENGARUH PENAMBAHAN EKSTENDER TERHADAP LIGNIN FENOL FORMALDEHID DARI SABUT KELAPA (Cocos nucifera) SEBAGAI ADHESIVE KAYU RAMAH LINGKUNGAN. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Penelitian ini bertujuan untuk mensintesis kopolimer Lignin Fenol Formaldehida (LPF) dari sabut kelapa dengan penambahan ekstender berupa tepung tapioka sebagai adhesive kayu ramah lingkungan. Pada penelitian ini sabut kelapa didelignifikasi dengan NaOH 25% kemudian diiendapkan dengan asam sulfat. Lignin yang diperoleh dilakukan uji kualitatif dan kuantitatif meliputi warna, rendemen, kadar kemurnian, hidroksil fenolik, dan bobot ekuivalen lignin. Hasil rendemen lignin dari sabut kelapa sebesar 38,92% dengan kemurnian 68%, kadar hidroksil fenolik 2,47%, dan bobot molekul ekuivalen 1666,67 g/mol. Lignin selanjutnya digunakan untuk sintesis LPF dengan penambahan ekstender tepung tapioka dengan variasi 10 %, 20% dan 30 % dari massa fenol melalui metode resol dengan katalis NaOH 50%. Perekat yang dihasilkan dilakukan uji sifat fisik dan kimia dengan perekat tanpa penambahan ekstender sebagai pembanding. Uji sifat fisik dan kimia tersebut meliputi penentuan kadar padatan, pH, viskositas, emisi formaldehida, dan kekuatan geser perekat untuk mengetahui kualitas adhesive. Kemudian dikarakterisasi dengan Spektrofotometer FTIR dan XRD. Dari hasil penelitian menunjukkan bahwa kopolimer LPF dengan penambahan ekstender 10% lebih baik dibandingkan dengan kopolimer LPF tanpa penambahan ekstender untuk perekat (adhesive) kayu dengan ketahanan rekat sebesar 955,34 N dan memiliki emisi formaldehid rendah 0,44 mg/L. This study aims to synthesize Lignin Phenol Formaldehyde (LPF) copolymer from coconut husk with the addition of an extender in the form of tapioca flour as an environmentally friendly wood adhesive. In this study, coconut husk was delignified with 25% NaOH then precipitated with sulfuric acid. The obtained lignin was subjected to qualitative and quantitative tests including color, yield, purity content, phenolic hydroxyl, and lignin equivalent weight. The yield of lignin from coconut husk was 38.92% with a purity of 68%, a phenolic hydroxyl content of 2.47%, and an equivalent molecular weight of 1666.67 g/mol. Lignin is then used for the synthesis of LPF with the addition of a tapioca flour extender with variations of 10%, 20% and 30% of the phenol mass through the resol method with 50% NaOH catalyst. The resulting adhesive was tested for its physical and chemical properties with the adhesive without the addition of an extender as a comparison. The physical and chemical test includes the determination of solids content, pH, viscosity, formaldehyde emission, and adhesive shear strength to determine the quality of the adhesive. Then characterized by FTIR and XRD spectrophotometer. The results showed that the LPF copolymer with the addition of a 10% extender was better than the LPF copolymer without the addition of an extender for wood adhesives with adhesion resistance of 955.34 N and low formaldehyde emission 0.44 mg /L.

Item Type: Thesis (Sarjana)
Additional Information: 1). Dr. Yusmaniar, M.Si ; 2). Dr. Fera Kurniadewi, M.Si
Subjects: Sains > Kimia
Divisions: FMIPA > S1 Kimia
Depositing User: Users 14629 not found.
Date Deposited: 15 Jul 2022 00:13
Last Modified: 15 Jul 2022 00:13
URI: http://repository.unj.ac.id/id/eprint/31770

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