PMID- 34576553
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240403
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 14
IP  - 18
DP  - 2021 Sep 15
TI  - Lignosulfonate-Based Conducting Flexible Polymeric Membranes for Liquid Sensing 
      Applications.
LID - 10.3390/ma14185331 [doi]
LID - 5331
AB  - In this study, lignosulfonate (LS) from the acid sulfite pulping of eucalypt wood 
      was used to synthesize LS-based polyurethanes (PUs) doped with multiwalled carbon 
      nanotubes (MWCNTs) within the range of 0.1-1.4% w/w, yielding a unique conducting 
      copolymer composite, which was employed as a sensitive material for 
      all-solid-state potentiometric chemical sensors. LS-based PUs doped with 1.0% w/w 
      MWCNTs exhibited relevant electrical conductivity suitable for sensor 
      applications. The LS-based potentiometric sensor displayed a near-Nernstian or 
      super-Nernstian response to a wide range of transition metals, including Cu(II), 
      Zn(II), Cd(II), Cr(III), Cr(VI), Hg(II), and Ag(I) at pH 7 and Cr(VI) at pH 2. It 
      also exhibited a redox response to the Fe(II)/(III) redox pair at pH 2. Unlike 
      other lignin-based potentiometric sensors in similar composite materials, this 
      LS-based flexible polymeric membrane did not show irreversible complexation with 
      Hg(II). Only a weak response toward ionic liquids, [C(2)mim]Cl and ChCl, was 
      registered. Unlike LS-based composites comprising MWCNTs, those doped with 
      graphene oxide (GO), reduced GO (rGO), and graphite (Gr) did not reveal the same 
      electrical conductivity, even with loads up to 10% (w/w), in the polymer 
      composite. This fact is associated, at least partially, with the different filler 
      dispersion abilities within the polymeric matrix.
FAU - Magina, Sandra
AU  - Magina S
AUID- ORCID: 0000-0003-4518-5718
AD  - CICECO-Aveiro Institute of Materials and Department of Chemistry, University of 
      Aveiro, 3810-193 Aveiro, Portugal.
FAU - Rudnitskaya, Alisa
AU  - Rudnitskaya A
AUID- ORCID: 0000-0002-7963-3892
AD  - CESAM and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, 
      Portugal.
FAU - Soreto, Silvia
AU  - Soreto S
AD  - I3N and Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal.
FAU - Costa, Luis Cadillon
AU  - Costa LC
AUID- ORCID: 0000-0001-7666-4741
AD  - I3N and Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal.
FAU - Barros-Timmons, Ana
AU  - Barros-Timmons A
AUID- ORCID: 0000-0002-6462-8679
AD  - CICECO-Aveiro Institute of Materials and Department of Chemistry, University of 
      Aveiro, 3810-193 Aveiro, Portugal.
FAU - Evtuguin, Dmitry V
AU  - Evtuguin DV
AUID- ORCID: 0000-0002-6304-5105
AD  - CICECO-Aveiro Institute of Materials and Department of Chemistry, University of 
      Aveiro, 3810-193 Aveiro, Portugal.
LA  - eng
PT  - Journal Article
DEP - 20210915
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC8470934
OTO - NOTNLM
OT  - carbon nanotubes
OT  - conducting polymer
OT  - electrical conductivity
OT  - graphene
OT  - ionic liquid
OT  - lignosulfonate
OT  - potentiometric sensors
OT  - transition metals
COIS- The authors declare no conflict of interest.
EDAT- 2021/09/29 06:00
MHDA- 2021/09/29 06:01
PMCR- 2021/09/15
CRDT- 2021/09/28 01:20
PHST- 2021/07/30 00:00 [received]
PHST- 2021/09/06 00:00 [revised]
PHST- 2021/09/07 00:00 [accepted]
PHST- 2021/09/28 01:20 [entrez]
PHST- 2021/09/29 06:00 [pubmed]
PHST- 2021/09/29 06:01 [medline]
PHST- 2021/09/15 00:00 [pmc-release]
AID - ma14185331 [pii]
AID - materials-14-05331 [pii]
AID - 10.3390/ma14185331 [doi]
PST - epublish
SO  - Materials (Basel). 2021 Sep 15;14(18):5331. doi: 10.3390/ma14185331.