?url_ver=Z39.88-2004&rft_id=1815031055&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PERANCANGAN+SHIELDING++ELECTROMAGNETIC+INTERFERENCE+DENGAN+MENGGUNAKAN+KOMPOSIT+MICROCRYSTALLINE+CELLULOSE-POLYURETHANE%2FCARBON+NANOTUBE+(MCC-PU%2FCNT)&rft.creator=Annisa%2C+Yulianty&rft.subject=680+Produksi+untuk+keperluan+khusus&rft.description=Semakin+banyaknya+perangkat+elektronik+digital+yang+rentan+terhadap+noise+menyebabkan+kebutuhan+akan+pelindung+EMI+(EMI+shielding)+meningkat.+Material+pelindung+EMI+saat+ini+banyak+dibuat+dari+bahan+komposit+berbasis+sintetik+yang+kurang+ramah+lingkungan.+Oleh+karena+itu%2C+penelitian+ini+dilakukan+untuk+membuat+pelindung+EMI+berbahan+alami%2C+yaitu+serat+dari+batang+singkong%2C+yang+merupakan+limbah+yang+banyak+ditemukan+di+Lampung.+Serat+batang+singkong+diolah+menjadi+Microcrystalline+Cellulose+(MCC)+sebagai+penguat+komposit%2C+dengan+polyurethane+(PU)+sebagai+matriks+dan+carbon+nanotube+(CNT)+sebagai+filler+untuk+meningkatkan+konduktivitas.+Komposit+dibuat+dalam+lima+variasi+persentasi+CNT+terahadap+berat+PU+yaitu+0%25%2C+5%25%2C+10%25%2C+15%25%2C+dan+20%25.+Komposit+yang+telah+dibuat+dilakukan+pengujian+FTIR+dan+pengukuran+S-parameter.+Pengujian+FTIR+dilakukan+pada+komposit+MCC-PU+dan+MCC-PU%2FCNT+20%25.+Hasil+FTIR+menunjukkan+adanya+gugus+O-H+dan+C-H+pada+kedua+sampel+dan+gugus+C%E2%89%A1N+pada+sampel+MCC-+PU%2FCNT+20%25.+Pengukuran+S-parameter+dilakukan+pada+material+komposit+dengan+menggunakan+vector+network+analyzer+(VNA)+pada+frekuensi+8+GHz+%E2%80%93+12+GHz.+Nilai+S-parameter+digunakan+untuk+memperoleh+nilai+shielding+effectiveness+(SE)+dan+resistansi+komposit+MCC-PU%2FCNT.+Hasil+SE+terbaik+dari+lima+sampel+MCC-%0D%0APU%2FCNT+berturut-turut+yaitu+0%25%2C+5%25%2C+10%25%2C+15%25%2C+dan+20%25+adalah+10%2C23+dB%2C+13%2C09+dB%2C+15%2C88+dB%2C+20%2C40+dB%2C+dan+36%2C22+dB.+Berdasarkan+hasil+nilai+shielding+effectiveness%2C+sampel+MCC-PU%2FCNT+20%25+memiliki+nilai+SE+yang+paling+tinggi.+Untuk+nilai+resistansi%2C+sampel+komposit+MCC-PU+memiliki+resistansi+yang+paling+tinggi+dan+sampel+MCC-PU%2FCNT+20%25+memiliki+resistansi+paling+lebih+rendah.+Nilai+resistansi+berkorelasi+dengan+nilai+shielding+effectiveness.+Material+MCC-+PU%2FCNT+20%25+memiliki+resistansi+yang+paling+rendah+sehingga+menghasilkan+SE+yang+paling+tinggi.%0D%0A%0D%0AThe+vast+growth+of+digital+electronic+devices+is+vulnerable+to+noise+pollution+causing+the+necessity+for+EMI+shielding+solutions+to+become+essential.+Nowadays++EMI+shielding+materials+are+mostly+made+using+synthetic-based+composite+materials%2C+which+is+environmentally+unfriendly.+Accordingly%2C+this+research+studied+the+manufacture+of+an+EMI+shielding+material+from+natural+fiber%2C+particularly+fiber+extracted+from+cassava+stems%2C+which+is+an+abundant+waste+in+Lampung.+Cassava+stem+fibers+were+processed+into+microcrystalline+cellulose+(MCC)+as+a+composite+reinforcement%2C+with+polyurethane+(PU)+serving+as+the+matrix+and+carbon+nanotubes+(CNTs)+acting+as+the+filler+to+enhance+conductivity.+The+composites+were+made+in+five+compositions%2C+based+on+the+variation+of+CNT+percentage+to+the+weight+of+PU%3A+0+wt%25%2C+5+wt%25%2C+10+wt%25%2C+15+wt%25%2C+and+20+wt%25.+The+composites+were+subjected+to+FTIR+testing+and+S-parameter+measurements.+Fourier+transform+infrared+(FTIR)+spectroscopy+was+employed+to+examine+the+chemical+composition+of+MCC-PU+and+MCC-PU%2FCNT+20+wt%25+composites.+The+FTIR+results+demonstrated+the+presence+of+O-H+and+C-H+groups+in+both+samples%2C+as+well+as+C%E2%89%A1N+groups+in+the+MCC-+PU%2FCNT+20+wt%25+sample.+The+C%E2%89%A1N+groups+in+MCC-PU%2FCNT+20+wt%25+indicate+that+the+CNTs+uniformly+spread+in+the+composites.+The+five+samples+undergone+the+S-parameter+measurements+using+a+vector+network+analyzer+(VNA)+at+frequencies+ranging+from+8+GHz+to+12+GHz.+The+S-parameter+values+were+used+to+obtain+the+shielding+effectiveness+(SE)+and+the+resistance+of+the+MCC-PU%2FCNT+composite.+The+SE+results+from+the+five+MCC-PU%2FCNT+samples%2C+namely+0+wt%25%2C+5+wt%25%2C+10+wt%25%2C+15+wt%25%2C+and+20+wt%25%2C+respectively%2C+are+as+follows%3A+10.23+dB%2C+13.09+dB%2C+15.88+dB%2C+20.40+dB%2C+and+36.22+dB.+The+MCC-PU%2FCNT+20+wt%25+sample+showed+the+highest+SE+value.+The+MCC-PU+composite+displayed+the+highest+resistance%2C+while+the+MCC-PU%2FCNT+20+wt%25+exhibited+the+lowest+resistance.+The+lowest+resistance+of+MCC-PU%2FCNT+20+wt%25+resulted+in+the+highest+SE.%0D%0A%0D%0A%0D%0A%0D%0A&rft.publisher=Teknik&rft.date=2024-11-28&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F80511%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F80511%2F2%2FTUGAS%2520AKHIR.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F80511%2F3%2FTANPA%2520HASIL.pdf&rft.identifier=++Annisa%2C+Yulianty++(2024)+PERANCANGAN+SHIELDING+ELECTROMAGNETIC+INTERFERENCE+DENGAN+MENGGUNAKAN+KOMPOSIT+MICROCRYSTALLINE+CELLULOSE-POLYURETHANE%2FCARBON+NANOTUBE+(MCC-PU%2FCNT).++Teknik%2C+Universitas+Lampung.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F80511%2F