Page 173 - CW E-Magazine (12-12-2023)

Special Report

to increase their sustainable economic
values. These authors have developed
a series of 2,2,6,6-tetramethylpiperi-
dine-1-oxyl cellulose nanofiber (TOCN)-
embedded solid polymer electrolytes
(SPEs) through a one-pot, organic sol-
vent-free manufacturing process, which
is environmentally friendly. TOCN acts as
a rigid 3D skeleton and PEG 3350 acts as
the soft matrix. The proposed material has
many desirable properties. (ACS Sustain-
able Chem. Eng., 2023; DOI: 10.1021/
catalytic amount of 4-dimethylamino- and hemicellulose components resulted acssuschem.eng.3C03349).
pyridine (DMAP). Two polyurethane in colour darkening and unsavoury Cellulose (C) processing in ionic
thermosets were designed and found odour release. These authors carried
to be useful. (Green Chem., 2023; DOI: out optimised scalable alkaline H O 2 liquids (ILs)
2
10.1039/D3GC00704A). oxidation of CS, which gave favourable L. Szabo et al have worked on getting
properties. The product had good tensile functional materials from C using ILs
Benign catalytic oxidation of strength (9.7 MPa), flexural strength which are non-volatile solvents with
potato starch (PS) (18.1 MPa), etc. The product met the high thermal and chemical stability,
Chinese standards. (ACS Sustainable
J.O.P. Broekman et al have referred Chem. Eng., 2023; DOI: 10.1021/acs- besides being environmentally friendly.
to oxidation as an excellent way to suschemeng.3C00691). Applications in coatings and thin films
for structural materials, e.g., for packag-
improve the properties of native starches
as the products are easier to handle, 2,2,6,6-tetramethylpiperi- ing, thin film filtration membranes,
have improved stability and enhanced din-1-oxyl oxidised cellulose immobilisation of enzyme, catalytically
active nanoparticles, separator membranes
adhesive properties. Sodium hypochlo- nanofiber embedded polymer and conductive composites for energy
rite is commonly used as an oxidant.
These authors, however, have adopted electrolytes for all-solid-state Li storage and other electronic application,
metal batteries
etc. are discussed. Cellulose-based
a commercial homogeneous binuclear
Mn catalyst ([Mn (μ-O) (tmtacn) ] ionogels, hydrogels and aerogels, composite
IV
2
2
3
[(CH COO) ] (Mncat), with tmtacn = P-J. Lin et al have referred to the rapidly fibres, etc. are also discussed. There is
2
3
1,4,7-trimethyl-1,4,7-triazacyclononane increasing demands of Li-ion batteries, emphasis on the purity of the starting
and H O as oxidant. Thus chlorinated where it is imperative to develop separa- material. Recyclability of ILs is an
2
2
waste products are not formed. Thus tors and even solid-state electrolytes with important issue. (Green Chem., 2023;
starch granules can be oxidised at room high biocompatibility/biodegradability DOI: 10.1039/D2GC04730F).
temperature with 0.0021 mol% Mncat
and 1 wt% H O . This method is benign.
2
2
(Cat. Sci. Technol., 2023; DOI: 10.1039/
D2CX01629J).
Biodegradable, colourless, and
odourless PLA/PBAT bioplas-
tics incorporated with corn
stover
R. Li et al have worked on making
colourless and odourless biodegradable
bioplastics. The corn stover (CS) meal
enforced the PLA/PBAT matrix using
the melt blending method, and the lignin

Chemical Weekly December 12, 2023 173
Contents Index to Advertisers Index to Products Advertised