新型气凝胶型木质复合材

新型气凝胶型木质复合材

图书基本信息
出版时间:2011-6
出版社:科学出版社
作者:李坚,邱坚 编著
页数:157
书名:新型气凝胶型木质复合材
封面图片
新型气凝胶型木质复合材

内容概要
  Nano technology and its applications in the field of wood
science andtechnology recently have gained much attention,
especially in viewof potential for wood modification by the
processes of preparing wood-inorganic nano composites. This book
reviews recent advances in wood-inorganic nano composite
technologies and reports the work of fabricatingnano wood-inorganic
aerogel composites by the sol-gel process andsupercritical drying
techniques. This research systematically reviews anddiscusses
technical principles of fabricating wood-SiO2 aerogel
composites.Physical properties and morphological characteristics of
prepared wood-SiO2 composites, distribution of SiO2 aerogel in wood
and mechanismsof compounding between wood and SiO2 aerogel are also
discussed.
  This book can be used as a college textbook as well as a
referencefor researchers in the fields of wood science and
technology, woodmodification and wood preservation.
书籍目录
PREFACE
0 1ntroduction
 0.1 Wood Functional Amelioration and Wood-Inorganic Compound
Material.
 0.2 Fundamental Aspects and Applications of Wood-Inorganic
Compounds
  0.2.1 Inorganic-Wood Composites
  0.2.2 Wood-Inorganic Nanometer Composite
  0.2.3 Biological Mineralization of Wood
 0.3 Development of Research on Wood-Inorganic Composites
  0.3.1 Wood-inorganic Composites Fabricated by Dual
Impregnation
  0.3.2 Fabrication of Wood-inorganic Composites by the Sol-Gel
Method
  0.3.3 Problems in Fabricating Wood-inorganic Composites by the
Sol-gel Process
 0.4 Implications of the Proposed Research
  0.4.1 Proposed Research
  0.4.2 Significance of the Research
1 Application of Wood-inorganic Nanometer Material in Wood
Science
 1.1 Nanotechnology in Wood Modification
 1.2 Combining Inorganic Nano Materials and Wood
  1.2.1 Inorganic Nano Particles
  1.2.2 Inorganic Nano Composites
 1.3 Outlook of the Use of Nano Materials in Wood
Modification
  1.3.1 Use of Nano Materials in improving of mechanical Properties
of Wood
  1.3.2 Wood Modification with Nano Materials for Environmental
Effects
  1.3.3 Use of Nano Material to Improve Wood Durability
  1.3.4 Use of Nano Material to Impart Wood Weathering
  1.3.5 Use of Nano Materials to Impart Thermal Degradation of
Wood
  1.3.6 Use of Nano Material to Improve Wood Dimensional
Stability
2 Technological Principles in Fabrication of Wood- Inorganic
Composites bythe Sol-gel Method
 2.1 Principles of Synthesis with Sol-gel Method
 2.2 Chemistry of Sol-gel Process
 2.3 Concepts and Characteristics of Aerogel .
 2.4 Fabrication ofWood-SiO2 Aerogel Nano Composite
  2.4.1 Impregnation of SiO2 Sol
  2.4.2 Principle of Drying SiO2 Aerogel with Supercritical
Fluids
  2.4.3 Equipment for Drying SiO2 Aerogel with Supercritical
Fluid
3 Research on Wood-SiO2 Aerogel Nanoeomposite
 3.1 Scope of Research
 3.2 Technical Approach
 3.3 Samples and Procedures
 3.4 Methods
  3.4.1 Fourier Transform Infrared Spectroscopy (FTIR)
  3.4.2 X-ray Photoelectron Spectroscope
  3.4.3 ThermalAnalysis
4 Fabrication ofWood-SiO2 Aerogel Nanoeomposites
 4.1 Fabrication of SiO2 Aerogel
  4.1.1 Materials and Methods
  4.1.2 Results and Discussion
 4.2 StudyonlmpregnafingWoodwiliaSiO2
SolbyF_aaVty-cellProcess
  4.2.1 Materials and Methods
  4.2.2 Results and Discussion
 4.3 Experiment on Supercritical Drying of SiO2 Alcogel
  4.3.1 Materials and Methods
  4.3.2 Results and Discussion
 4.4 Analysis of Phase Composition of SiO2 Aerogel
 4.5 Conclusions
5 Distribution of SiO2 Aerogel in Wood Composites
 5.1 Microscopic Observation of SiO2 Aerogel in Wood
  5.1.1 Materials and Methods
  5.1.2 Results and Discussion
 5.2 Distribution and Characteristics of SiO2 Aerogel in Wood and
Wood Composites
  5.2.1 Materials and Methods
  5.2.2 Results and Discussion
 5.3 Wettability of Wood-SiO2 Aerogel Composite
  5.3.1 Materials and Methods
 ……
6 Physical Properties ofWood-SiO2 Aerogel Composites
7 Mechanisms in the Formation of Wood-SiO2 Aerogel Composites
8 Summaryand Outlook
References
Plates

章节摘录
  Improving
mechanical
properties
of
wood
is
one
of
the
most
important
aspects
ofwood-based
nano
composites.
Evidences
have
shown
that
use
of
non-metallic
nanomaterials
as
fillers
in
plastic
and
rubber
greatly
improve
mechanical
properties.
Themodification
effects
are
attributed
to
great
surface
area
of
surface
of
nano
particleswhich
increases
adhesion
between
nano
particles
and
the
polymeric
matrix.
It
isexpected
that
the
use
ofnano
materials
would
greatly
improve
mechanical
properties
ofwood.
However,
there
is
little
accumulated
data
to
support
that
expectation,
andtherefore
more
research
should
be
focused
on
this
task.1.3.2
Wood
Modification
with
Nano
Materials
for
Environmental
Effects  Application
of
inorganic
nano
materials
would
be
able
to
maintain
theenvironmental
properties
of
wood.
Due
to
small
sizes
nano
materials
infiltrated
into
thecell
walls
react
with
cell
wall
materials
and
become
part
of
the
cell
wall
and
thus
ableto
maintain
the
capillary
system
of
the
cell
wall.
Nano
materials
are
ab  e
to
createspecial
surface
properties
to
make
the
composite
either
super
hydrophilic
or
superhydrophobic.
The
basic
principle
is
by
chemical
means
to
construct
nano-size
andgeometrically
compensating
surfaces
with
nano
materials.
Strong
adsorption
of
gases(or
air)
on
the
surface
creates
a
gaseous
membrane
covering
surfaces
of
the
compositeblocking
the
adsorption
and
absorption
of
water
or
oil
by
the
composite
(Wang
2002).It
is
expected
that
such
technology
would
be
able
to
increase
greatly
dimensionalstability
of
wood
in
which
the
surface
modified
by
nano
materials
acts
like
a
surfacecoating.
In
addition,
the
modified
surface
also
would
provide
color
stability
andimprove
acoustics
properties.
Therefore,
it
is
significant
to
pursue
such
technology.  Fumie
and
Saka
(1998)
fabricated
Chamaecyparis
obtuse
wood-Si02
inorganiccomposites
by
incorporating
biocide
TMSAN
in
the
system;
the
resulting
compositeshowed
very
good
resistance
against
brow-rot
decay
but
was
not
resistant
againstwhiterot
decay.
However,
the
composite
prepared
by
the
HFOETMOS-TMSAHsystem
increased
hydrophobicity
of
the
composite,
making
the
composite
resistantagainst
both
brown-rot
and
white-rot
decay.According
to
research
in
Japan,
there
are
three
basic
methodologies
to
fabricatewood-inorganic
composites
with
the
sol-gel
process.
Firstly,
it
is
necessary
to
controlthe
moisture
of
wood;
free
water
and
bound
water
in
wood
should
be
removed
and
usesonly
the
water
of
constitution
to
provide
water
molecules
to
react
with
the
solprecursors.
The
second
method
is
to
pre-treat
wood
with
coupling
agents
so
as
to
effectively
cross-link
metallic
orgarucs
to
wood
components
for
maximizing
the
effectsofimproving
wood
properties.
The
third
is
to
incorporate
fire
retardants
and
biocides
in
the
system
and
at
the
same
time
taking
the
issue
of
environmental
impacts
in
toconsideration
by
carefully
selecting
benign
chemicals.Research
on
wood-inorganic
composites
with
the
sol-gel
process
also
has
beenconducted
in
China.
Wang
(1996)
fabricated
wood-inorganic
composites
by
the
sol-gelprocess
with
TEOS.
It
is
believed
that
portion
of
the
Si02
gel
condenses
with
celluloseand
some
fill
the
cell
lumen,
forming
a
net
work
of
Si02
gel
in
wood.
In
the
subsequentresearch
that
GPTMS
was
used
as
a
coupling
agent
to
increase
linkage
betweeninorganic
Si02
and
wood
components
in
the
cell
wall
through
formation
of
Si-O-Siand
C-O-C
bonds
and
improves
the
overall
property
of
wood,
We
believe
in
the
above
work
Si02
nucleus
formed
in
the
cell
walls
of
wood
and
growth
of
these
Si02nucleus
resulted
in
the
wood-Si02
nanometer
composite.
Wang
et
al
(2000)
fabricatedhighperformance
wood-Si-Al-composites
with
TEOS.  ……


下载链接

新型气凝胶型木质复合材下载

评论与打分
    暂无评论