PROMOSI DOKTOR SUN THEO CONSTAN LOTEBULO NDRURU

Gambar di atas merupakan Suasana setelah Surat Keputusan Sidang Promosi Doktor dibacakan dan Promovendus dinyatakan Lulus dengan Predikat Cum Laude
(Gedung Annex Lantai III, Institut Teknologi Bandung)

Judul Disertasi:

PENGEMBANGAN BIOPOLIMER ELEKTROLIT PADAT BERBASIS PADUAN TURUNAN SELULOSA BERISI CAIRAN ION UNTUK APLIKASI BATERAI ION LITIUM

Foto bersama Promotor dan Ko-Promotor

Prof. Dr. I Made Arcana, MS., Dr. Bunbun Bundjali, MS dan Dr. Deana Wahyuningrum, S.Si., M.Si

Presentasi Promovendus dapat diakses pada:
https://www.youtube.com/watch?v=vVUAPUw45yw

Foto Haru bersama Keluarga

Foto bersama rekan kandidat Doktor Kimia ITB

Seminar/ Publikasi dalam Menempuh Program Doktor

I.      Seminar Nasional

     Simposium Nasional Polimer X, Surabaya, Himpunan Polimer Indonesia, 4 November 2015 (Oral Presenter).

II.     Seminar Internasional

·      The 2nd International Seminar on Metallurgy and Materials, Tangerang, Lembaga Ilmu Pengetahuan Indonesia, 24-25 September 2018 (Best Presenter/ Penampil Terbaik).

·      The 7th International Conferences of Mathematics and Natural Sciences, Bandung, Institut Teknologi Bandung, 2-3 November 2018 (Oral Presenter).

III.    Publikasi Internasional

·      Ndruru, S.T.C.L., Wahyuningrum, D., Bundjali, B. dan Arcana, I.M. (2019): Green Synthesis of [EMIm]Ac Ionic Liquid for Plasticizing MC-based Biopolimer Electrolyte Membranes, Bulletin of Chemical Reaction Engineering and Catalysis, 14 (2), 345-357 (published; terindeks scopus Q3)

·      Ndruru, S.T.C.L., Wahyuningrum, D., Bundjali, B. dan Arcana, I.M. (2019). Green Simple Microwave-Assisted Extraction (MAE) of Cellulose from Theobroma Cacao L. (TCL) husk, IOP Materials Science Engineering 541: Conference Series, 541, 1-12 (published; terindeks scopus).

·      Ndruru, S.T.C.L., Wahyuningrum, D., Bundjali, B. dan Arcana, I.M. (2019): Biopolimer Electrolyte Membranes of LiClO₄-complexed Methyl cellulose as Lithium-ion Batteries Separator Candidate, Journal of Engineering and Technological Sciences (draft; terindeks scopus Q2).

Preparation and Characterization of Biopolymer Electrolyte Membranes Based on LiClO4-Complexed Methyl Cellulose as Lithium-ion Battery Separator

Sun Theo Constan Lotebulo Ndruru1, Deana Wahyuningrum2, Bunbun Bundjali1& I Made Arcana1,*
1Inorganic and Physical Chemistry Division, Faculty of Mathematics and Natural
Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, 40132, Indonesia
2Organic Chemistry Division, Faculty of Mathematics and Natural Sciences, Institut
Teknologi Bandung, Jalan Ganesha 10, Bandung, 40132, Indonesia 

*E-mail: arcana@chem.itb.ac.id
 

Abstract. The polymer electrolyte membrane is a main component of lithium-ion batteries (LiBs), serving as separator and electrolyte. In this work, we prepared biopolymer electrolyte (BPE) membranes of lithium perchlorate (LiClO4)-complexed methyl cellulose (MC). Methyl cellulose (MC), a cellulose derivative, has attractive properties for use as biopolymer electrolyte. The bulkier anion size of lithium salt (LiClO4) significantly enhances the performance of biopolymer electrolyte (BPE) membranes. The fabricated biopolymer electrolyte (BPE) membranes were characterized by FTIR, EIS, tensile tester, XRD and TGA. Biopolymer electrolyte membranes with various weight percentages of LiClO4 salt (0%, 5%, 10%, 15%, and 20%) were prepared using a simple solution casting technique. Incorporation of 10% weight of LiClO4 into the MC-based host polymer was selected as optimum condition, because this yielded good conductivity (3.66 x 10-5 S cm-1), good mechanical properties (tensile strength 35.97 MPa and elongation at break 14.47%), good thermal stability (208.4 to 338.2 °C) as well as ease of preparation and low cost of production. Based on its characteristics it can be stated that the 10% LiClO4-complexed MC membrane meets the requirements as a candidate separator for lithium-ion battery application.

Keywords: biopolymer electrolyte; lithium-ion batteries; methyl cellulose; lithium
perchlorate; separator.

Green simple microwave-assisted extraction (MAE) of cellulose from Theobroma cacao L. (TCL) husk

S T C L Ndruru1, D Wahyuningrum2, B Bundjali1 and I M Arcana1

1Physical and Inorganic Chemistry Divisions, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Bandung, Indonesia, 401322 

2Organic Chemistry Divisions, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Bandung, Indonesia, 40132

Abstract. This work had successfully produced Theobroma cacao L. (TCL) husk-based cellulose used efficiently and environmentally friendly simple microwave-assisted extraction (MAE) method. The microwave-assisted heating time optimization of alkaline-treatment was carried out for 10, 20, 30 and 40 minutes. Microwave-assisted bleaching process was also conducted using green bleaching agent H2O2, and also utilizing microwave heating for 60 minutes. The followed treatment was filtered, neutralized, washed and overnight freeze-dried. Fourier transform infrared (FTIR) analysis confirmed common cellulose functional groups of TLC, are β-(1,4)-glycosidic bonds at ~897 cm-1, O-H (hydrogen bond) at 3412 cm-1, C-H vibration at 2902 cm-1, C-O-C asymmetric at 1161 cm-1, and C-OH out-of-plane bending at 665 cm-1. FTIR analysis, in addition, also studied crystallinity ratio (CrR), hydrogen bond energy (EH) and hydrogen bond distances (RH), while particle size analyzer (PSA), X-ray diffraction (XRD) and thermogravimetry analysis (TGA) were carried out to confirm particles sizes, crystallinities and thermal stability properties of TCL husk, cellulose of TCL husk and commercial-microcrystalline cellulose (MCC), respectively.

Keywords: microwave-assisted extraction (MAE), Theobroma cacao L. (TCL), cellulose.