Course syllabus ZWM - Wood Modification (FFWT - WS 2019/2020)


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Course code: ZWM
Course title in language of instruction: Wood Modification
Course title in Czech: Wood Modification
Course title in English: Wood Modification
Mode of completion and number of credits: Exam (4 credits)
(1 ECTS credit = 28 hours of workload)
Mode of delivery/Timetabled classes: full-time, 1/2 (hours of lectures per week / hours of seminars per week)
Language of instruction: English
Level of course: master; master continuing; doctor
Semester: WS 2019/2020
Name of lecturer: Ing. Petr Čermák, Ph.D. (examiner, instructor, lecturer, supervisor, tutor)
Ing. Jakub Dömény, Ph.D. (examiner, instructor, lecturer, tutor)
Ing. Petr Pařil, Ph.D. (instructor, lecturer)
Ing. Radim Rousek (instructor, lecturer)
Prerequisites: none
 
Aims of the course:
The objective of the course is to make the students familiar with existing discrepancies in availability and demand of wood quantity as well as in native wood properties and demanded technical requests. The main problem in utilization of lot of wood species and assortments is low quality of wood, which is often not suitable for higher value demands. Wood modification can help to improve these unsufficient wood properties. Traditional wood protection, processed by impregnation of wood with biocides, is mainly limited on increase of durability of wood, reducing or preventing the wood deterioration activity of wood decaying fungi or insects. Effectiveness of inserted biocides with typically toxic components is mainly limited on decay restriction, further improvements of additional wood properties are not possible or possible only in a minor degree, because relevant structure of wood is widely unchanged by this process. In contrast to this wood modification, which works on the basic of structure changes of wood components, influences a lot of wood properties, like moisture behavior (humidity uptake, swelling/ shrinkage), physical and elasto-mechanical properties as well as durability.In addition the mainly toxic-free composition of wood modification agents leads to environmental friendly process conditions and non-complex admission requirements. Furthermore not only toxic-free, but additionally sustainable and renewable production and application processes, using native solutions from plant growing components have been developed by Mendelu wood research group. Students will be educated in theoretical background of native and technical improved wood quality as well as in techniques of wood impregnation with semi-practical autoclave plant in Department Technology Center Utechov. Additional tests, using quality and quantity evaluations, are introduced to prove success of treatments.
 
Course contents:
1.Introduction (allowance 3/6)
 
a.wood as a composite material
b.anisotropic behavior of wood
c.chemical composition and structure of wood

2.Wood modification (allowance 2/4)
 
a.wood modification background and theory
b.principles of wood cell wall modification
c.material properties of modified wood
d.utilization and application

3.Chemical modification (allowance 2/4)
 
a.technological methods, impregnation autoclave
b.chemical solutions (oils, waxes, nano-particles)

4.Thermal modification (allowance 2/4)
 
a.methods of treatments, influence of temperature and time
b.process optimization
c.material properties of thermally modified wood

5.Wood densification (allowance 2/4)
 
a.wood plasticization (steam, ammonia, MW)
b.densification parameters (compression ratio, directions, etc.)
c.material properties of densified wood

6.Microwave modification (allowance 2/4)
 
a.microwave theory
b.application of MW for material properties improvment
c.material properties of MW treated wood

 
Learning outcomes and competences:
Specific competences:
 
-Ability to analyze results and appropriete data interpretation
-Ability to design and optimize wood modification processes
-Ability to solve tasks from mechanics and physics of wood

Type of course unit: optional
Year of study: Not applicable - the subject could be chosen at anytime during the course of the programme.
Work placement: There is no compulsory work placement in the course unit.
Recommended study modules: -
 
Learning activities and study load (hours of study load):
Type of teaching methodDaily attendance
Direct teaching
     lecture16 h
     practice32 h
     consultation20 h
Self-study
     preparation for exam18 h
     preparation for regular assessment4 h
     preparation of presentation6 h
     writing of seminar paper16 h
Total112 h
 
Assessment methods:
Final protocol from experimental tests will be done by students and final oral exam (4 credits) will be based on discussion on certain topics related to the wood modification (A - F).
 
Recommended reading:
TypeAuthorTitlePublished inPublisherYearISBN
RQHILL, C A S.Wood modification : chemical, thermal and other processesChichester, EnglandJohn Wiley & Sons2006978-0-470-02172-9
RQHandbook of wood chemistry and wood compositesBoca Raton, Fla.CRC Press20050-8493-1588-3
RQTransport Processes in WoodBerlinSpringer-Verlag19843-504-12574-4
RQTORGOVNIKOV, G.Dielectric Properties of Wood and Wood-Based MaterialsBerliSpringer-Verlag19933-540-55394-0
RQWood-Water RelationsBerlinSpringer-Verlag19883-540-19258-1
RERADEMACHER, P.Combined Processes of Beech Wood Modification for Floorings -- Influence on Properties, Durability and Health Aspects978-80-7509-137-6
REČERMÁK, P. -- RAUTKARI, L. -- HORÁČEK, P. -- SAAKE, B. -- RADEMACHER, P. -- SABLÍK, P.Analysis of dimensional stability of thermally modified wood affected by re-wetting cycles2015ISSN 1930-2126
REDÖMÉNY, J. -- KOIŠ, V. -- ZAPLETAL, M.Application of Microwave Treatment for the Plasticisation of Beech Wood (Fagus sylvatica L.) and its Densification for Flooring System Purposes2014ISSN 1930-2126
REČERMÁK, P. -- HORÁČEK, P. -- RADEMACHER, P.Measured temperature and moisture profiles during thermal modification of beech (Fagus sylvatica L.) and spruce (Picea abies L. Karst.) wood2014ISSN 0018-3830
REDÖMÉNY, J. -- KOIŠ, V. -- DEJMAL, A.Microwave Radiation Effect on Axial Fluid Permeability in False Heartwood of Beech (Fagus sylvatica L.)2014ISSN 1930-2126
REKOIŠ, V. -- DÖMÉNY, J. -- TIPPNER, J.Microwave Device for Continuous Modification of Wood2014ISSN 1930-2126

RQrequired
RErecommended


Last modification made by Ing. Alice Malá on 05/20/2019.

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