Bacterial Cellulose and Its Polymeric Nanocomposites - The Nanoscience and Technology of Renewable Biomaterials - page 262

Figure 9.27 Atomic Force Microscopy Images of BC grown in (a) HS medium, (b) HS
mediumwith 1% PEO, (c) HS medium with 3% PEO, and (d) HS mediumwith 5% PEO
(68).(ReprintedwithpermissionfromBrown,E.E.;Laborie,M.-P.G.,Bioengineeringbacterial
cellulose/poly(ethylene oxide) nanocomposites. Biomacromolecules, 2007, 8, 3074-81.
Copyright(2007),AmericanChemicalSociety.)

10 9

10 8

10 7

59:41
53:47
33:67
23:77
15:85
0:100

10 6

10 5

10 4

10 3

− 60 − 40 − 20 0

Temperature (

20 40 60 80 100

° C)

Figure 9.28 Storage tensile modulus E' versus temperature at 1 Hz for nanocomposites
of varying BC/PEO ratios (68). (Reprinted with permission from Brown, E.E.; Laborie,
M.-P.G.,Bioengineeringbacterialcellulose/poly(ethyleneoxide)nanocomposites.Biomacro-
molecules,2007,8,3074-81.Copyright(2007),AmericanChemicalSociety.)

various water-soluble polymers including poly(vinyl alcohol). It appeared that PVA was
easily washed from the BC/PVA nanocomposite during the purification step although
some PVA could be detected when 2% PVA was added in the growth medium of BC. In
this case, the BC network structure and crystalline structure appeared to be unaffected by
the presence of PVA. This contrasted with the morphology of the BC/methyl cellulose