Irfan Gustian

• University of Bengkulu

The synthesis of composite materials based on bacterial cellulose with fly ash (FA) has been carried out based on the mass ratio between bacterial cellulose and fly ash, namely 0.005:4.995; 0.01:4.99; 0.015:4.985, and 0.02:4.98. Bacterial cellulose was obtained from the fermentation of coconut water and fly ash was treated after being obtained from...

This research aims to develop adhesives from liquid rubber compounds with a variety of tackifiers, a combination of copal resin, and turpentine oil. It also aims to characterize the adhesives to determine the quality of the adhesives produced. The research comprised several stages, including the preparation of rubber additive dispersions and soluti...

This research is focused on the development of adhesives through the utilization of different types of tackifiers. The primary raw materials employed comprise 60% concentrated latex, which is subsequently blended with additives that have been dispersed, including KOH as a stabilizing agent, stearic acid and ZnO as activators, BHT as an antioxidant,...

Synthesis and characterization of proton conducting membranes based on human nail keratin and sulfonated polysulfone has been carried out. This research was conducted to make a proton conducting membrane based on acid-base pairs. In this study, human nail was dissolved using NaOH solvent. Through a neutralization process using glacial acetic acid,...

Particle board research produced from a number of grain size of Rice Husk and liquid rubber compound has been carried out. First particle board was produced by mixing rice husk with a number of grain size were 10-25 mesh; 25-50 mesh; 50-75 mesh and <75 mesh with liquid rubber compound as much as 45% to form a particle board with size of 5 x 10 x 7....

The purpose of this research to study of physicochemical properties of keratin from human nails which still contains impurities. The method in this study, keratin from human nail waste was dissolved using NaOH solvent at room temperature, then neutralized to pH 7 using glacial acetic acid. On this report have studied the analysis of functional grou...

In this work, proton-conducting membranes have been prepared by entrapping human nail keratin in bacterial cellulose at different mass ratios. Bacterial cellulose was obtained by fermenting coconut water with the Acetobacter xylinum bacterium, and keratin was obtained from human nails. The membrane is produced by the blending and heating process at...

Pengabdian Pada Masyarakat dari Dana Bantuan Pengabdian S2 Kimia tahun 2020 berjudul “Pembuatan Sediaan Obat Sederhana Bagi Keluarga Besar SMA Negeri 8 Kota Bengkulu” telah dilaksanakan pada tanggal 8 Desember 2020. Metode yang dipergunakan pada pengabdian ini meliputi ceramah, diskusi dan praktik pembuatan obat sederhana, meliputi pembuatan sediaa...

Telah dilakukan pendekatan green synthesis ZnAl2O4 menggunakan ekstrak daun kumis kucing (Orthosiphon aristatus). Penelitian ini bertujuan untuk mengetahui efek ekstrak daun kumis kucing terhadap kristalinitas, ukuran, dan morfologi ZnAl2O4 yang diperoleh.. Green synthesis ZnAl2O4 dilakukan dengan menggunakan variasi massa ekstrak, yaitu 8, 12, dan...

Composite material based on polystyrene-activated carbon/platinum (PS/AC/Pt has been prepared by variation of weight ratio between polystyrene, activated carbon, and platinum in chloroform solvent. The functional groups of the composite material were identified by FTIR, the morphology and the element composition were analyzed by SEMEDX, and the pro...

Studies on composite proton-conducting membranes made of human hair keratin and bacterial cellulose have been done. Keratin from human hair is produced through hydrolysis using NaOH as a solvent. Composite membranes constructed of bacterial cellulose and human hair keratin had mass variations of 4.5/0.5, 4.7/0.3, and 4/1. At temperatures of 25 ºC,...

A particle board is a board made of lignocellulosic material and together with an adhesive and then pressed. In this research, a particle board is made by mixing coco dust with a number of liquid natural rubber percentages. Next particle board is molded then dried and pressed to get 2,5 cm thickness and further characterization is carried out which...

This study aimed to determine the antibacterial activity of the ethanol extract of the leaves of Tapak Kuda (Ipomoea pes-caprae) against Staphylococcus epidermidis. The method used was Kirby-Bauer for the antibacterial test with various concentrations of ethanolic extract of I. pes-caprae leaf extract: 5 mg/mL, 20 mg/mL, 35 mg/mL, and 50 mg/mL, wit...

Kabupaten Rejang Lebong Provinsi Bengkulu merupakan kabupaten dengan jumlah kebun kopi yang cukup luas. Salah satu kelompok tani yang bertanam kopi dikebunnya adalah Kelompok Tani Pangestu Rakyat yang tepatnya berlokasi di Desa Baru Manis Kecamatan Bermani Ulu Kabupaten Rejang Lebong. Selain berkebun kelompok tani ini mengolah kopi hasil panen mere...

The aqueous extract of Rivina humilis was suitable to reduce silver ions (Ag+) to form micron-sized metallic silver at room temperature and without any addition of external reducing agent or stabilizer compounds. The reduction process was assisted by light, indicated by the colour change of the reaction mixture and supported by the appearance of pe...

Synthesis of composite material based on sulfonated polystyrene and bacterial cellulose as a proton membrane has been carried out. In this study, the membrane was made with the variations mass ratio of sulfonated polystyrene : bacterial cellulose 1,5: 3,5, 2,5: 2,5, 3,5: 1,5. The previous step was sulfonation of polystyrene, in which the polystyren...

p>Pengembangan penelitian tentang material berbasiskan sumber daya alam lokal dan dapat diperbaharui terus dikembangkan akhir-akhir ini. Hal tersebut didasari adanya kebutuhan material baru dengan karakteristik yang lebih menguntungkan dan dapat digunakan pada aplikasi yang spesifik. Penelitian ini bertujuan untuk mempelajari preparasi membran algi...

C. diffusus Vahl cellulose was used as an alternative in the preparation of cellulose-polyaniline composites. This involved the use of sodium hydroxide, hydrogen peroxide, and sulfuric acid as reagents for the isolation of C. diffusus Vahl cellulose. The isolated material was analysed using Fourier Transforms Infrared (FTIR) and the results showed...

Silver incorporated R. corymbosa (L.) cellulose was obtained through the direct attachment (insertion) of silver ions to natural cellulose, followed by the green reduction of ions to metallic silver, using aqueous extract of fresh R. corymbosa (L.). In addition, Fourier transform infra-red (FTIR) analysis of the isolated cellulose showed some peaks...

The main objective of this report is the preparation and characterization of cellulose biofilm from coastal pandanus ( Pandanus odorifer ) leaves. The first experiment parts is the preparation of coastal pandanus leaves biofilm using a simple dissolution method followed by casting evaporation technique. Further experiments are the characterization...

Composite membrane based on sulfonated polysulfone-natural zeolite-titanium dioxide has been performed. The composite membrane is carried out by mixing the sulfonated polysulfone with natural zeolite, with the mass ratio of sulfonated polysulfone: zeolite; 1: 0.5, 1: 1, and 1: 2. In each variation has been added titanium dioxide with of 10% (w/v) t...

A single compound (white powder) has been isolated from methanol extract of Sentang (Azadirachta excelsa) stem by means of column chromatography using chloroform and methanol as eluents with step gradient polarity. 1H-NMR spectrum showed that proton connected with carbon that has hydroxyl and alkene bond. Furthermore, 13C-NMR, DEPT 45 and 135 spect...

The main problem in the people’s rubber in the village of Genting Perangkap and Lubuk Balam, Air Besi, North Bengkulu is a fungal disease that attacks the roots of plants. White root fungus disease (JAP) cause of death in rubber, so that the disease attacks resulted in significant losses. Based on field survey team PPM to land smallholder rubber of...

The antitermitic activity of Cinnamomum parthenoxylon leaves crude methanol extract and its fractions against Coptotermes curvignathus was investigated in a laboratory test. A no-choice test was employed for determining antitermitic activity. The results showed that all fractions and crude methanol extract at concentrations tested was reduced the s...

A strategic approach was developed to synthesize silver nanoparticles from AgNO3 using Melastoma malabathricum seed extract. The reaction of silver ions with the organic compounds in the seed extract proceeded smoothly at room temperature without any additional capping agent. The appearance of an absorption peak around 427 nm provided evidence for...

Composites material based on sulfonated cyclone fibre cellulose (SCFC) and benzotriazole (Btri) have been prepared. Cyclone fibre cellulose (CFC) was sulfonated with trimethylsilyl chlorosulfonate (TMSCS), with high degree of sulfonation (150%). The composites material, SCFC-Btri were prepared by doping of benzotriazole in various mole ratios (0.12...

Proton conducting composite membranes have been prepared via binary mixtures comprising sulfonated polysulfone (SPSU) and natural zeolite (NZ). Polysulfone has been sulfonated in 1, 2-dichloroethane using the homogeneous method with trimethylsilyl chlorosulfonate as sulfonating agent. The ratio of monomer mol and trimethylsilyl chlorosulfonate was...

Abstrak Telah dilakukan pembuatan dan karakterisasi mekanik papan partikel berbasis cangkang buah karet dengan perekat limbah plastik polipropilen. Papan partikel dibuat dengan variasi berat serbuk cangkang buah karet masing-masing 50 gram, 100 gram dan 150 gram, dicetak dengan ukuran 28 cm ´ 12 cm ´ 4 cm. Campuran serbuk cangkang dan perekat sela...

Synthesis of proton conductive membranes based on acid-base complex pair: bacterial cellulose (BC) and benzotriazole (Btri) has done. Microbial cellulose is derived from bacterial cellulose market, known as nata de coco. Nata de coco was pulverized and washed with solution of NaClO 2% then heated for 30 minutes to boil. Proton conductive membranes...

Preparation of composite membranes based on sulfonated polysulfone and activated carbon have been done. Polysulfone was sulfonated through homogeneous method using sulfonating agent trimethylsilyl chlorosulfonate. Activated carbon derived from coal tailings which then carbonized at temperature of 400 °C and activated through chemical activation in...

Intercalated graphite from coal tailings have been modified through the intercalation of iron. Coal tailings which is a byproduct of the destruction process and flakes washing results from mining coal. Intercalation of iron goal is to improve the physical properties of graphite and modifying sizes of crystal lattice structure with thermal method. M...

The termiticidal activity of n-hexane and methanol fractions of Acorus calamus Linn rhizomes against Coptotermes curvignathus Holmgren was investigated. Both fractions have demonstrated strong termiticidal activity. The activity of n-hexane fraction was stronger than that of the methanol fraction. Based on GC-MS data, β-asarone was found to be a ma...

Biodiesel from rubber seed oil has been successfully synthesized through two-stage transesterification. The first stage is the pre esterification with catalyst H2SO4 to obtained fatty acids methyl ester, the second stage transesterification using KOH catalyst and biodiesel maximum was found 97.55%. Analysis GC-MS results of rubber seed oil biodiese...

ZnAl2O4was synthesized by coprecipitation method with and without using water extract of Impatiens balsamina L. The aim of this work was to evaluate the influence of water extract of Impatiens balsamina L to crystallinity, crystallite size, and morphology of ZnAl2O4. The weight variation of Impatiens balsamina L that used was 8 g, 12 g, and 20 g in...

Synthesis of hybrid materials based on sulfonated polystyrene (SPS) and graphene (G) have been done. Polystyrene has sulfonated using homogeneous method with sulfonating agent trimethylsilyl chlorosulfonic (TMSCS). Graphene has derived from coal tailings that have been carbonized 400°C and pyrolysis 800°C. Sulfonation degree were obtained 125%, FTI...

In this work, acid-base complex pair polymer electrolyte membranes on sulfonated polysulfone with 1H-benzotriazole were investigated. Polysulfone was sulfonated in 1,2-dichloroethane using the homogeneous method with trimethylsilyl chlorosulfonate as sulfonating agent. The monomer mole ratio between polysulfone and trimethysilyl chlorosulfonate was...

Study on comparison the physicochemical properties of bunch press fibre cellulose (Bpfc) and cyclone fibre cellulose (Cfc) wastes from industry Crude Palm oil (CPO) have been performed. The physicochemical properties both of celluloses have been done such as the average degree of polymerization (DP), solubility properties, functional group analysis...

The use of aqueous extract of Sapindus rarak as medium in the synthesis of ZnO nanoparticles by the hydrothermal method has been carried out at moderate conditions. The current conditions produced the desired ZnO nanoparticles with difference shapes and crystallinity depending on the concentration of aqueous extract of S. rarak.

Polymer poly (1-vinyl-1,2,4-triazole) have been synthesized via free radical polymerization using the monomer 1-vinyl-1,2,4-triazole and the initiator azobisisobutyronitrile (AIBN) in toluene as solvent. Proton conducting membranes were prepared by adding nitrilotri (methyl triphosphonic acid) as a dopant into a solution of poly (1-vinyl-1,2,4-tria...

Polymer poly (1-vinyl-1,2,4-triazole) have been synthesized via free radical polymerization using the monomer 1-vinyl-1,2,4-triazole and the initiator azobisisobutyronitrile (AIBN) in toluene as solvent. Proton conducting membranes were prepared by adding nitrilotri (methyl triphosphonic acid) as a dopant into a solution of poly (1-vinyl-1,2,4-tria...

As anhydrous proton conductive membranes, sulfonated polysulfone (SPSU) and 1H-1,2,3-benzotriazole (BTri) hybrid membranes were prepared. The sulfonation of polysulfone was performed with trimethylsilyl chlorosulfonate, and high degree of sulfonation (134%) was obtained. The polymer electrolyte membranes, SPSU–BTriX, were prepared by blending of 1H...

Polymer electrolyte composite membranes based on poly(1-vinyl-1,2,4-triazole) (PVTRI) and nitrilotri(methyl triphosphonic acid) (TPA) were investigated. PVTRI was produced by free radical polymerization of 1-vinyl-1,2,4-triazole. The polymer PVTRI was doped with TPA at various molar ratios x=0.125, x=0.25, and x=0.5. The proton transfer from TPA to...