GDL

Synthesize of Sodium Lignosulfonate (NaLS) From Coconut Coir Waste as Superplasticizer on Mortar

Tugas Akhir, 017 / 2018 / TKI
Undergraduate Theses from JBPTPPOLBAN / 2019-02-07 10:32:04
Oleh : 151411033 - Aditya meita Nugraha - 151411035 - Ande Fudja Rafyanto (m.ande.rafryanto@gmail.com)
Dibuat : 2019-02-07, dengan 4 file

Keyword : Coconut coir, Sodium Lignosulfonate (NaLS), Delignification, Isolation of lignin, and Sulfonation.
Subjek : Sabut kelapa, Natrium Lignosulfonat (NaLS), Delignifikasi, Isolasi lignin, dan Sulfonasi.

Sabut kelapa merupakan bagian terbesar (±35%) dari bobot buah kelapa. Pemanfaatan sabut kelapa menjadi komoditas bernilai tinggi hanya sekitar ±3,2%. Sabut kelapa tersusun atas Lignin 45,84%; Selulosa 43,44%; dan Hemiselulosa 0,25%. Pada penelitian ini dilakukan pemanfaatan limbah sabut kelapa untuk diolah menjadi natrium lignosulfonat (NaLS). Tujuan dari penelitian ini adalah menentukan karakteristik lignin berbahan baku limbah sabut kelapa, menentukan karakteristik NaLS berdasarkan variasi rasio pereaksi (perbandingan sulfonating agent NaHSO3 terhadap lignin) dan waktu sulfonasi, serta menentukan karakteristik mortar berdasarkan variasi dosis NaLS (perbandingan NaLS terhadap adukan mortar b/b). Proses pembuatan NaLS melalui delignifikasi, isolasi lignin dan sulfonasi. Delignifikasi dilakukan pada rasio sabut kelapa terhadap NaOH 10% 1:25 (b/v), suhu 70-800C, kecepatan pengadukan 100 rpm dan waktu delignifikasi 2 jam. Isolasi lignin dilakukan pada rasio H2SO4 20% terhadap lindi hitam 11:20 (v/v). Sulfonasi lignin dilakukan dengan variasi rasio pereaksi 40, 50, 60, 70, dan 80% (b/b); variasi waktu sulfonasi 1, 2, dan 3 jam; suhu 900C; kecepatan pengadukan 100 rpm; dan pH = 6. NaLS yang diperoleh berupa padatan coklat. Karakterisasi NaLS menggunakan spektrofotometer Shimadzu UV 1700 dan FTIR. Uji kinerja NaLS sebagai superplasticizer menggunakan Cincin uji aliran dengan variasi dosis NaLS 0,05; 0,10; 0,15; 0,20; dan 0,25% (b/b). Berdasarkan karakterisasi lignin diperoleh konsentrasi lignin sebesar 54,817% dan rendemen lignin sebesar 27,295%. Berdasarkan karakterisasi produk NaLS diperoleh konsentrasi NaLS sebesar 32,585% dan yield terbesar 17,937% pada rasio pereaksi 60% serta waktu sulfonasi 3 jam. Pada uji kinerja sebagai superplasticizer didapatkan dosis optimum pada 0,10% (b/b) dengan nilai aliran 112,50%.

Deskripsi Alternatif :

Coconut coir is the largest part (± 35%) of coconut weight. The utilization of coconut coir into high-value commodity is only about ± 3.2%. Coconut coir is composed of lignin 45,84%; cellulose 43.44%; and hemicellulose 0.25%. In this research, coconut coir waste is utilized to be processed into sodium lignosulfonate (NaLS). The purpose of this research were to determine the characteristics of lignin made from coconut coir waste, to determine the characteristics of NaLS based on variations of reagent ratio (ratio of sulfonating agent NaHSO3 to lignin) and sulfonation time, and to determine characteristics of mortar based on variations of NaLS dosage (NaLS to mortar b/b) . The process of NaLS synthesis are through delignification, isolation of lignin and sulfonation. Delignification was performed on the ratio of coconut coir to NaOH 10% 1:25 (w/v), temperature 70-800C, stirring speed 100 rpm and time of delignification. Isolation of lignin was performed on ratio H2SO4 20% to black liquor 11:20 (v/v). Lignin sulfonation was performed with variations of reagent ratio 40, 50, 60, 70, and 80% (w/w); variations time of sulfonation 1, 2, and 3 hours; temperature 900C; stirring speed 100 rpm and pH = 6. NaLS obtained is brownish solids. Characterization of NaLS using Shimadzu UV 1700 and FTIR Spectrophotometer. The performance test of NaLS as superplasticizer used flow test ring by varying dose of NaLS 0,05; 0,10; 0,15; 0,20; and 0,25% (w/w). Based on the characterization of lignin obtained concentration of lignin 54,817% and yield of lignin 27,295%. Based on NaLS characterization obtained concentration of NaLS 32,585% and the largest yield of NaLS 17,937% in condition reagent ratio 60% and time of sulfonation 3 hours. In the performance test as superplasticizer obtained the optimum dose at 0,10% (w/w) with a flow value of 112,50%.

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