Sintesis dan Karakterisasi Surfaktan Lignosulfonat dari Lignin Alkali Standar dan Lignosulfonat Teraminasi dari Lignosulfonat Standar


Nila Tanyela Berghuis(1*), Anggun Kirana Devi Shaenazha Putri(2), Eng Paramita Jaya Ratri(3), Syiffa Assatyas(4), Septhian Marno(5), Nelliza Putri(6), Eng Bayu Prabowo(7)

(1) Program Studi Kimia Fakultas Sains dan Komputer Universitas Pertamina, Indonesia
(2) Program Studi Kimia Fakultas Sains dan Komputer Universitas Pertamina, Indonesia
(3) Program Studi Kimia Fakultas Sains dan Komputer Universitas Pertamina, Indonesia
(4) Program Studi Kimia Fakultas Sains dan Komputer Universitas Pertamina, Indonesia
(5) Program Studi Kimia Fakultas Sains dan Komputer Universitas Pertamina, Indonesia
(6) Program Studi Kimia Fakultas Sains dan Komputer Universitas Pertamina, Indonesia
(7) Program Studi Kimia Fakultas Sains dan Komputer Universitas Pertamina, Indonesia
(*) Corresponding Author

Abstract


Ketersediaan lignin yang melimpah dan efisiensi biaya, lignosulfonat dapat digunakan sebagai stabilisasi surfaktan. Penelitian ini melakukan sintesis surfaktan lignosulfonat dan lignosulfonat teraminasi dengan tujuan untuk menghasilkan gugus sulfonat pada lignin alkali standar dan gugus amina pada lignosulfonat standar serta mengetahui nilai tegangan antarmuka lignosulfonat teraminasi hasil sintesis. Metode yang digunakan adalah sulfonasi lignin alkali standar  menggunakan reaksi substitusi elektrofilik dan aminasi lignosulfonat standar menggunakan reaksi Mannich. Lignosulfonat hasil sintesis akan dikarakterisasi menggunakan FTIR (Fourier Transform Infrared) dan lignosulfonat teraminasi hasil sintesis akan dikarakterisasi menggunakan FTIR dan IFT (Interfacial Tension) tensiometer. Karakterisasi lignosulfonat hasil sintesis menggunakan FTIR menunjukkan adanya perbedaan kemunculan vibrasi ikatan dengan lignin alkali standar. Perbedaan dapat terlihat dengan adanya vibrasi ikatan S=O sulfat pada bilangan gelombang 1420,78 cm-1 dan C-S-O pada bilangan gelombang 623,37 cm-1 pada lignosulfonat hasil sintesis. Karakterisasi FTIR lignosulfonat teraminasi hasil sintesis menunjukkan adanya vibrasi ikatan N-H pada bilangan gelombang 3258,62 cm-1 dan vibrasi ikatan C-N pada bilangan gelombang 1214,45 cm-1. Kedua vibrasi ikatan tersebut tidak dapat ditemukan pada hasil analisis FTIR lignosulfonat standar. Hasil pengukuran IFT menunjukkan nilai tegangan antarmuka lignosulfonat teraminasi hasil sintesis sebesar 2,124 mN/M. Nilai tegangan antarmuka lignosulfonat teraminasi hasil sintesis yang lebih rendah dari lignin alkali hasil isolasi tandan kosong kelapa sawit dan lignosulfonat standar menunjukkan bahwa penggunaan amina primer berupa etilendiamin dapat mempengaruhi lipofilisitas lignosulfonat teraminasi sebagai surfaktan.

Keywords


Lignin alkali; lignosulfonat; lignosulfonat teraminasi; surfaktan; tegangan antarmuka.

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DOI: https://doi.org/10.15575/ak.v9i1.17550

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