MME RIGOU Panagiota
Doctorante / PhD student
461 rue de la Papeterie - CS 10065 - F-38402 Saint Martin d'Hères Cedex
04 76 82 69 00
Contact e-mail
Site perso
LGP2 - Équipe de recherche / Research group
BioChip - Bioraffinerie : chimie et éco-procédés
BioChip - Biorefinery: chemistry and eco-processes
-
RegenCell - Procédé propre de dissolution de cellulose de bois pour la production de fil textile
-
RegenCell - Own wood cellulose dissolution process for textile yarn production
Publications (HAL)
Activités / CV
Two
-
step oxidation,
NaIO
4
–
NaClO
2
Chacterization
methods
:
▪
Carbonyl
(HCO)
measurement
by titration
▪
Carboxyl
(HCOOH) content by
conductometric
titration
▪
Viscosity
–
degree
of
polymerization
(
DPv
) of the
oxidized
cellulose
▪
Dissolution
yield
Optimization of cellulose oxidation and
dissolution to produce textile yarns
•
Optimization of NaIO
4
–
NaClO
2
oxidations to
produce oxidized cellulose with high amount of
COOH groups and without severe degradation of
DPv
•
Enhancement of cellulose dissolution in alkaline
medium
•
Increase cellulose accessibility by using pre
-
treatments (mercerization, mechanical refining, high
consistency
mixing)
•
Recycling of NaIO
4
, replacement of NaClO
2
to
chlorine free oxidant
•
Regeneration of dissolved cellulose to yarns with
properties comparable to viscose yarns
Panagiota RIGOU
Ph.D
.
thesis
(2023
-
2026)
LGP2 (N. Marlin; G.
Mortha
; D.
Lachenal)
Clean process for dissolving wood cellulose for the production of textile
yarn
Procédé propre de dissolution de cellulose de bois pour la production de fil textile
Context
Objectives
Methods
Dissolving pulps
▪
Expanding market for dissolving pulp (textile
production, cellulose derivatives and nanocellulose)
▪
Wood pulp or cotton linters with high cellulose
content (>90 %) and distinct properties
▪
Main methods to obtain dissolving pulps: Kraft pre
-
hydrolysis (PHK), and acid bi
-
sulphite (AS)
Regenerated cellulose
▪
Chemically modified cellulose deriving from
dissolving pulps or cotton linters
▪
Cellulose derivatives that can be obtained: viscose,
lyocell,
cupro
and acetate
Photo
Funded
by: Grenoble INP
–
ANR
RegenCell
project
In collaboration
with
CTP,
UniLaSalle
,
Gemtex
Biochip
Natural
fibers
▪
Viscose: polluting production process (use of CS
2
)
▪
Lyocell
–
Cupro
: expensive production processes
▪
Cotton: high consumption of water, demand for
more arable land, use of pesticides
Synthetic fibers
▪
Fossil
-
based derivatives
▪
64 % of the global fiber
market
▪
Release of microplastics
even if recycled
AGU unit
Di
-
aldehyde
cellulose (DAC)
2,3
-
dicarboxy
-
cellulose (DCC)
Regeneration of dissolved
cellulose to yarns
Cellulose dissolution