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指 導 教 授 : 王 振 乾
學 生 : 陳 雅 貞
日期：2010.11.01
Abstract
The biodegradation and hydrolysis rates of an
aliphatic aromatic copolyester(PBAT) were measured
in manure,food, and yard compost environments and
in phosphate buffer solution (pH ＝8.0) and
vermiculite at 58 ℃.
Mineralization, molecular weight reduction, and structural
changes determined by DSC, FTIR, and 1H NMR were used as
indicators of the biodegradation and hydrolysis rates.
Materials
• PBAT : Poly(butylene adipate-co-terephthalate)
Biodegradation
film samples were analyzed for
A mixture
of 250
(wet
carbon
content and composts
Good quality compost
should
haveg compost
basis)
powder
carbonasto nitrogen ratio
a C/N ratio between
10with
and 640g cellulosefor
positive control.
using a PerkinElmer CHN
PBAT Film analyzer.
manure compost
yard compost
food compost
At 7, 15, 30, and 45 days,58℃
Hydrolysis
The hydrolysis test was
performed using an FDA
migration cell in a 40
ml glass amber,the cells
were filled with 35 ml
ofphosphate buffer with a
pH of 8.0 as a control
for hydrolysis
35 ml of vermiculite
with 50% moisture
content (mixed with
phosphate buffer) in
order to simulate only
hydrolysis under
composting conditions
Conclusions
• PBAT degraded more and faster in manure
compost than in yard or food waste composts.
• The ester group in the aliphatic BA unit was
more susceptible to hydrolysis than that in
the aromatic BT unit.
• During biodegradation, increases in PBAT
crystallinity were observed, which indicated
that the amorphous regions biodegraded faster
than the crystalline regions.