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Official Journal of the Japan Wood Research Society

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Vibrational property changes of spruce wood by impregnation with water-soluble extractives of pernambuco (Guilandina echinata Spreng.)

Abstract

Sitka spruce (Picea sitchensis Carr.) was treated with water-soluble extractive components of pernambuco (Guilandina echinata Spreng. syn Caesalpinia echinata Lam.) by two methods: impregnation under evacuation using an aspirator and repetitive surface application using a brush. The influence of these treatments on the vibrational properties were examined. The loss tangent (tan δ) of the impregnated specimen decreased, up to nearly a half of its original value, with increasing weight gain. It is suggested that the decrease in tan δ results from impregnation of the extractive components into the amorphous region of cell walls, forming secondary bonds between matrix substances. The surface application of the extractive components, on the other hand, hardly brought about the desirable change in vibrational properties.

References

  1. 1.

    Sugiyama M, Matsunaga M, Minato K, Norimoto M (1994) Physical and mechanical properties of pernambuco (Guilandina echinata Spreng) used for violin bows (in Japanese). Mokuzai Gakkaishi 40:905–910

    Google Scholar 

  2. 2.

    Matsunaga M, Sugiyama M, Minato K, Norimoto M (1996) Physical and mechanical properties required for violin bow materials. Holzforschung 50:511–517

    CAS  Article  Google Scholar 

  3. 3.

    Ono T, Norimoto M (1983) Study on Young's modulus and internal friction of wood in relation to the evaluation of wood for musical instruments. Jpn J Appl Phys 22:611–614

    Article  Google Scholar 

  4. 4.

    Norimoto M, Tanaka F, Ohgama T, Ikimune T (1986) Specific dynamic Young's modulus and internal friction of wood in the longitudinal direction (in Japanese). Wood Res Techn Notes 22:53–65

    Google Scholar 

  5. 5.

    Matsunaga M, Minato K (1998) Physical and mechanical properties required for violin bow materials II: Comparison of the processing properties and durability between pernambuco and substitutable wood species. J Wood Sci 44:142–146

    Article  Google Scholar 

  6. 6.

    Yano H (1994) The changes in the acoustic properties of Western red cedar due to methanol extraction. Holzforschung 48:491–495

    CAS  Article  Google Scholar 

  7. 7.

    Obataya E, Norimoto M (1995) Acoustic properties of cane (Arundo donax L.) used for reeds of woodwind instruments. I. The relationships between vibrational properties and moisture contents of cane (in Japanese). Mokuzai Gakkaishi 41:289–292

    Google Scholar 

  8. 8.

    Obataya E, Norimoto M (1995) Acoustic properties of cane (Arundo donax L.) used for reeds of woodwind instruments. II. Analysis of vibrational properties by a viscoelastic model (in Japanese). Mokuzai Gakkaishi 41:449–453

    Google Scholar 

  9. 9.

    Norimoto M (1982) Structure and properties of wood used for musical instruments. I. On the selection of wood used for piano soundboards (in Japanese). Mokuzai Gakkaishi 28:407–413

    Google Scholar 

  10. 10.

    Yano H, Oonishi K, Mukudai J (1990) Acoustic properties of wood for the top plate of guitar (in Japanese). J Soc Mater Sci Jpn 39:1207–1212

    Article  Google Scholar 

  11. 11.

    Yano H, Matsuoka I, Mukudai J (1992) Acoustic properties of wood for violins (in Japanese). Mokuzai Gakkaishi 38:122–127

    Google Scholar 

  12. 12.

    Yano H, Yamada T, Minato K (1986) Change in acoustical properties of sitka spruce due to reaction with formaldehyde (in Japanese). Mokuzai Gakkaishi 32:984–989

    Google Scholar 

  13. 13.

    Akitsu H, Norimoto M, Morooka T (1991) Vibrational properties of chemically modified wood (in Japanese). Mokuzai Gakkaishi 37:590–597

    CAS  Google Scholar 

  14. 14.

    Akitsu H, Norimoto M, Morooka T, Rowell RM (1993) Effect of humidity on vibrational properties of chemically modified wood. Wood Fiber Sci 25:250–260

    CAS  Google Scholar 

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Matsunaga, M., Minato, K. & Nakatsubo, F. Vibrational property changes of spruce wood by impregnation with water-soluble extractives of pernambuco (Guilandina echinata Spreng.). J Wood Sci 45, 470–474 (1999). https://doi.org/10.1007/BF00538955

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Key words

  • Pernambuco
  • Vibrational property
  • Extractives
  • Impregnation
  • Musical instrument