Pengaruh Komponen Kimia dan Ikatan Pembuluh terhadap Kekuatan Tarik Bambu

https://doi.org/10.5614/jts.2016.23.1.4

Authors

  • Effendi Tri Bahtiar Fakultas Kehutanan, Institut Pertanian Bogor, Kampus IPB Darmaga Bogor 16680.
  • Naresworo Nugroho Fakultas Kehutanan, Institut Pertanian Bogor, Kampus IPB Darmaga Bogor 16680.
  • Surjono Suryokusumo Fakultas Kehutanan, Institut Pertanian Bogor, Kampus IPB Darmaga Bogor 16680.
  • Dwi Premadha Lestari Fakultas Kehutanan, Institut Pertanian Bogor, Kampus IPB Darmaga Bogor 16680.
  • Lina Karlinasari Fakultas Kehutanan, Institut Pertanian Bogor, Kampus IPB Darmaga Bogor 16680.
  • Deded Sarip Nawawi Fakultas Kehutanan, Institut Pertanian Bogor, Kampus IPB Darmaga Bogor 16680.

Keywords:

Bambu, Best subset regression, Ikatan pembuluh, Kekuatan tarik, Komponen kimia.

Abstract

Abstrak. Bambu merupakan salah satu contoh material komposit alami yang tersusun atas beraneka ragam sel. Sel-sel fiber yang tersusun menjadi ikatan pembuluh diyakini merupakan sel yang paling bertanggung jawab terhadap kekuatan bilah bambu. Selain jumlah ikatan pembuluh, kekuatan tarik bambu juga dipengaruhi oleh kandungan komponen kimia dan bagian ruas/buku. Penelitian ini menunjukkan bahwa semakin banyak jumlah ikatan pembuluh, maka kekuatan tarik bambu semakin besar. Kandungan lignin meningkatkan kekuatan tarik pada bagian ruas secara proporsional (linier), bahkan kuadratik pada bagian buku. Peningkatan kandungan lignin dalam selang yang ditemukan dalam penelitian ini (33%) selalu meningkatkan kekuatan tarik bilah bambu sehingga titik balik maksimum tidak dapat ditemukan. Tingginya nilai korelasi kekuatan tarik dengan proporsi alpha selulosa terhadap holoselulosa pada bagian ruas memperlihatkan pentingnya peranan proporsi alpha selulosa tersebut, meskipun
prosedur best subset regression tidak membacanya akibat terjadinya autokorelasi.

Abstract. Bamboo is natural composite material which is built from many types of cells. Fibers cells which are bundled become vascular bundles have highest contribution toward the strength of bamboo split among others. Besides the amount of vascular bundles, the bamboo split strength is also determined by chemical component of cell walls and its position (internodes/node). This research reported that the tensile strength has positive correlation with the amount of vascular bundles. If the amount vascular bundles increase, then the tensile strength also increases. The increasing of lignin contents in cell wall proportionally and quadratically increases the tensile stress of internodes and node of bamboo split, respectively. This research did not found the maximum stationer  point of quadratic equation for lignin content effect toward bamboo split tensile strength, thus the tensile strength always increase along with the lignin content in this research range (<33%). Correlation value between tensile strength and ratio of alpha cellulose to holocellulose is high which prove that alpha cellulose highly contribute to the tensile strength even though best subset regression procedure could not identified this phenomenon because of its autocorrelation occurrence.

References

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Published

2016-04-01

Issue

Section

Articles