Biology Reference
In-Depth Information
Figure 5.6
UV-vis spectra of the iodine-doped films of amylose-grafted
PVA.
to produce a maltooligosaccharide-grafted PVA. Then, the
phosphorylase-catalyzed enzymatic polymerization of Glc-1-P from
the maltooligosaccharide graft chains on the PVA main chain was
conducted to obtain the amylose-grafted PVA. This synthetic route
is explained as (i)
→
→
(vi) in Fig. 5.1. A film of the product was
soaked in an iodine-iodide ethanol solution to form an iodine-doped
film. The UV-vis analysis of the doped film indicated that iodine was
retained in this film even after it was left standing for 24 h (Fig. 5.6).
This was probably because the iodide ions were contained in the
cavities of the amylose graft chains in this film.
(iii)
5.6
Chemoenzymatic Synthesis of Amylose-
Grated Polydimethylsiloxane
The chemoenzymatic approach by utilizing the phosphorylase-
catalyzed enzymatic polymerization was applied to the
preparation of amylose-grafted inorganic polymeric materials
such as polydimethylsiloxanes (PDMSs) [35]. PDMSs have various
interesting properties, e.g., high oxygen permeability, low toxicity,
and biocompatibility, which are advantages as practical biomaterials
