Melbourne School of Land and Environment Department of Forest and Ecosystem Science

Krisdianto Sugiyanto

Department of Forest and Ecosystem Science
The University of Melbourne, Creswick Campus
Water Street, Creswick, VIC, 3363, Australia
Email: k.sugiyanto@pgrad.unimelb.edu.au
Phone: +61 03 5321 4346, 0412 234 426(M)
Fax: +61 03 5321 4166
Curriculum Vitae: (pdf)

Degree

PhD

Thesis title

Microwave surface treatment and its application for wood preservation

Supervisors

Prof Peter Vinden
Prof Grigori Torgovnikov

Project Outline

This experiment studies the microwave modification of wood structure to improve its permeability. Green wood or freshly peeled posts and poles range in moisture content from 40 – 300% depending on wood species. Green timber therefore readily absorbs microwave energy. With suitable microwave schedules, the steam pressure generated within the wood cells creates narrow micro voids in the radial-longitudinal plane. A several thousand-fold increase in wood permeability can be achieved in wood species that previously were considered impermeable. A special microwave applicator (PC-1) that operates on a frequency of 2.45 GHz has been developed for timber surface treatment. The applicator has been designed and built based on computer modelling of the interaction between timber and MW energy. Improvements in wood surface permeability are measured by studying wood preservative distribution at various depths in the wood, together with microscopic analysis of the occurrence of micro voids. Current results show that after microwave treatment, the highest temperatures are recorded on the surfaces of the wood. There is then a gradual decrease in temperature with depth in the timber. Macroscopically, more micro void formation occurs near the surfaces of the timber. Similarly micro void formation occurs either very sparsely or is absent at depth in the timber. Preservative treatment results in penetration of preservative through the induced micro voids in the radial longitudinal direction of the wood to a limited depth of penetration depending on the intensity of power application.

Qualifications

Master of Wood Science, The University of Melbourne, Australia, 2001 – 2001

Graduate Diploma in Forest Industries, The University of Melbourne, 2000 – 2001

Bachelor of Forestry Science, Gadjah Mada University, Indonesia, 1992 – 1997

Previous work experience

March 1998 – present: Researcher - Indonesian Forest Products Research and Development Center.

Specialty:

  1. Anatomical properties of wood and rattan

  2. Wood and rattan drying

  3. Forest products utilization and technology

  4. Microwave technology for wooden materials

Responsibilities:

  1. Conducting research in forest products utilization and technology.

  2. Presenting and publishing research results

  3. Providing education and training of forest product utilization and technology

  4. Working with researcher from other country to develop bilateral relationship

Awards/scholarships

- Australian Development Scholarship, January 2001 – February 2003

- The best graduate of Forest Products Technology Department, Gadjah Mada University, 1997

 

 

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