Page 39 - Kutnar, Andreja, et al., eds., 2015. Proceedings of the 1st COST Action FP1307 International Conference - Life Cycle Assessment, EPDs, and modified wood. University of Primorska Press, Koper.

Acetaldehyde
80

emission

(µg/m² h)
60

40
dry-­‐welded

20

0

24
h
72
h
144
h

Measurement
Yme

Figure
2:

Acetaldehyde
emission
from
welded
beech
specimens,
as
determined
by
the
emission-­‐

chamber
test
for
6
days.

Acetone/acroleine
80

emission
(µg/m²
h)

60
dry-­‐welded

40

20

0

24
h
72
h
144
h

Measurement
Yme

Figure
3:

Acetone/acrolein
emission
from
welded
beech
specimens,
as
determined
by
the

emission-­‐chamber
test
for
6
days.

Furfural
emission
4000
dry
welded

(µg/m²h)
3000
wet
welded

2000

1000

0
144
h

24
h
72
h

Measurement
Yme

Figure
4:

Furfural
emission
from
welded
beech
specimens,
as
determined
by
the
emission-­‐chamber

test
for
6
days.

Conclusion:
It
was
found
that
welded
beech
emitted
significantly
large
amounts
of
aldehydes
and

ketones.
The
main
VOC
that
emitted
from
welded
wood
at
the
end
of
the
first
day
was:
furfural

(11000
μg/m2h),
formaldehyde
(257
μg/m2h),
acetone/acrolein
(75
μg/m2
h),
and
acetaldehyde

(61
μg/m2h).
High
moisture
content
of
wood
could
limit
the
emission
of
these
VOC.
Compared
to

wood
based
panels
with
emission
from
its
entire
surface,
the
welded
wood
samples
produced
a

considerable
amount
of
formaldehyde
and
furfural
only
from
its
thin
weld-­‐line
and
only
during

the
first
day.
After
6
days
these
VOC
emissions
had
decreased
to
low
concentration
to
which
one

can
be
exposed
without
adverse
health
effects
when
welded
wood
is
used
indoor.

References

Gfeller,
B.,
Zanetti,
M.,
Properzi,
M.,
Pizzi
A.,
Pichelin,
F.,
Lehmann,
M.,
and
Delmotte,
L.
(2003).
Wood

bonding
by
vibrational
welding.
Journal
of
Adhesion
Science
and
Technology,
17
(11),
1573–1589.

27