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Ananda Putra
Kimia UNP
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

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Karakterisasi Komposit Selulosa Bakteri – Ekstrak Daun Kacapiring (Gardenia Jassminoides J.Ellis) dengan Penambahan Crosslinker Muhammad Iqbal; Elsa Yuniarti; Ali Amran; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1704.25 KB) | DOI: 10.24036/p.v11i1.113666

Abstract

Bacterial cellulose (BC) can be applied in various fields such as biomedical, separation membranes, artificial blood vessels, and substrates for cartilage tissue engineering. Bacterial cellulose still has low mechanical properties, so a bacterial cellulose composite was formed with Gardenia Leaf Extract (CBC-GLE) to obtain higher mechanical properties. The purpose of this study was to determine the effect of adding crosslinker starch 1,2 and 3% soaked with CBC-GLE to form (CBC-GLEC) by knowing the mechanical, physical, and structural properties of (CBC-GLEC). Bacterial cellulose is produced from a mixture of coconut water, sugar and urea. Then fermented with Acetobacter Xylinum for 14 days. Bacterial cellulose was composited with gardenia leaf extract and was called the bacterial cellulose-gardenia leaf extract composite (CBC-GLE). BC, CBC-GLE and CBC-GLEC were characterized by testing water content, tensile strength, compressive strength, structural analysis using FTIR and degree of crystallinity using XRD. The addition of Crosslinker can reduce the percentage of water content of CBC-GLEC 3% with a value of 90.73%, CBC-GLE 95.69% and BC 99.21%. The best tensile strength test results were the addition of crosslinked amilum starch with a concentration of 3% (CBC-GLEC) with a value of 121.45 MPa, CBC-GLE 49.81 MPa and BC 32.09 MPa. The best compressive strength test results were the addition of starch crosslinker with a concentration of 3% (CBC-GLEC) with a value of 4.38 mm, CBC-GLE 3.42 mm and BC 2.65 mm. The results of the FTIR spectrum showed that the functional groups contained in cellulose only experienced a shift, while the results of the analysis of the degree of crystallinity showed that the percentage of the degree of crystallinity of BC was 75.47%, CBC-GLE 94.42 %, CBC-GLEC starch 3% was 67.26 %
Kelarutan Zat Warna Organik dalam Gelasi Mikroemulsi Water In Oil dari Sistem Air, Surfaktan Nonionik (Brij 35) dan Pentanol Hanny Sri Asih; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (924.16 KB) | DOI: 10.24036/p.v11i1.113408

Abstract

Research on solubility from organic pigments of turmeric (Curcuma longa Linn) and telang flower (Clitoria ternatea L.) in water-in-oil microemulsion gelation on system of water, nonionic surfactant (Brij 35) and pentanol has been studied. The purpose of this research was the preparation of water-in-oil microemulsion gelation, determines solubility, density, and bias index of organic pigments in water-in-oil microemulsion gelation on system of water, nonionic surfactant (Brij 35) and pentanol. The method used is the sol-gel method. The  solubility in water-in-oil microemulsion gelation of turmeric is 2,41832% (pH 4,5) and 2,61402% (pH 9,5) and telang flower is 1,21274%  (pH 4,5) and 1,6136% (pH 9,5). The bias index of turmeric is 1,4024 (pH 4.5) and 1,4034 (pH 9,5) and telang flower is 1,4004  (pH air 4,5) and 1,4014 (pH 9,5).The density of turmeric is 0,88778g/cm3 (pH 4,5) and 0,88912g/cm3 (pH 9,5) and telang flower is 0,8793g/cm3 (pH 4,5) and  0,8872g/cm3 (pH 9,5).
Kelarutan Zat Warna Organik Dalam Gelasi Mikroemulsi Water In Oil Sistem Air, Surfaktan Kationik (Hexadecyl Trimethyl Ammonium Bromide) dan Pentanol Pamela Jurdilla; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 1 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1596.707 KB) | DOI: 10.24036/p.v11i1.113389

Abstract

Research on the solubility of organic dyes in gelation microemulsion water in oil (w/o) water system, cationic surfactant (Hexadecyl Trimethyl Ammonium Bromide) and pentanol aims to prepare gels from microemulsion (w/o) using the sol-gel method by adding TEOS and ethanol in a ratio of 1:8 mol which hydrolyzed with water to form a gel, the percentage of organic dye solubility of turmeric powder at pH 4,5 and 9,5 3,92% and 3,95% then dragon fruit peel powders 1,96% and 1,93% at pH 4,5 and 9,5. Respectively, density testing can be carried out to see the concentration of the dye with greatest value that is turmeric powder 0,8677 g/cm3 and 0,8684 g/cm3 for pH 4,5 dan 9,5. Measurement of refractive index to see the homogeneity of the largest solution is turmeric at pH 4,5 and 9,5 namely 1,4014 and 1,4024.
Co-Authors Ali Amran Elsa Yuniarti Hanny Sri Asih Nurwijayanti Pamela Jurdilla