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Ida Sriyanti
Physics Education, Universitas Sriwijaya, Palembang-Prabumulih Street KM.32, Indralaya 30662, ID, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Physics

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Pengaruh Parameter Proses Electrospinning pada Komposit Polyvinylidene Fluoride/Polyacrylonitrile Nanofiber Ida Sriyanti; Muhammad Rama Almafie; Rahma Dani; Meutia Kamilatun Nuha Ap Idjan; Radiyati Umi Partan; M Rudi Sanjaya; Jaidan Jauhari
Jurnal Penelitian Pendidikan IPA Vol 9 No 9 (2023): September
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i9.4840

Abstract

PAN cannot be used as a stand-alone nanofiber, so it needs to be modified through copolymerization with other polymers, such as PVDF. It is composite mutually beneficial for both PVDF/PAN polymers. Study aims to see the effect of process parameters, such as voltage, flow rate and needle tip distance of PVDF/PAN composite nanofiber as well as molecular interaction and crystal structure, to confirm the presence of polymer in the nanofiber composite. The nanofibers with solution parameters PN1: PVDF 6% and PAN 8%, PN2: PVDF 6% and PAN 10%, and PN3: PVDF 6% and PAN 12% were prepared using electrospinning. Morphology of the process parameters of voltage (12kV, 16kV, 18kV), flow rate (30 μl/min, 60 μl/min, 90 μl/min) and needle tip distance (75 mm, 100 mm, 125 mm) were observed. The results showed straight and continuous fibre morphology, with a smooth surface and no beaded structure, with homogeneous fibre distribution with an increase in diameter from 394 ± 79 nm (NF1) to 851 ± 89 nm (NF3). The optimal state was in the solution of PN2: PAN 10% (w/w) and PVDF 6% (w/w), High Voltage 12 kV, Flow Rate PN3: 60 μl/min, and Needle to Collector Distance 75 mm.
Pengembangan E-Modul Berbasis Learning Cycle 5E untuk Meningkatkan Kemampuan Berpikir Kreatif Siswa SMP Meri Kartikasari; Ismet Ismet; Ida Sriyanti
Jurnal Penelitian Pendidikan IPA Vol 9 No SpecialIssue (2023): UNRAM journals and research based on science education, science applic
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9iSpecialIssue.6528

Abstract

A valid, practical, and effective learning cycle 5e-based e-module has been successfully developed. The method used is Development Research with the Rowntree development model which consists of three stages, namely the planning stage, the development stage, and the evaluation stage. The instruments used in this research are validity, practicality and effectiveness test instruments.  The development process through content validity test, language, suitability of learning cycle 5E and creative thinking ability, practicality test, and field test. The results showed that the e-module developed had an average validity percentage of 4.03 with a good category. In the practically test, the e-module averaged 4.6 with a very practical category. The test of the effectiveness of the use of e-modules has an average n-gain of 0.7 with a high category of improving students' creative thinking skills.
Co-Authors Almafie, Muhammad Rama Ismet Jaidan Jauhari M Rudi Sanjaya Meri Kartikasari Meutia Kamilatun Nuha Ap Idjan Radiyati Umi Partan Rahma Dani