TY - JOUR
T1 - Synthesis, characterization, and humidity-responsiveness of guar gum xanthate and its nanocomposite with copper sulfide covellite
AU - Le, Trung-Anh
AU - Zouheir, Morad
AU - Nikiforow, Kostiantyn
AU - Khatib, Muhammad
AU - Zohar, Orr
AU - Haick, Hossam
AU - Huynh, Tan-Phat
N1 - Funding Information:
T.-A. Le acknowledges the DNMR doctoral fellowship from Åbo Akademi University and T.-P. Huynh acknowledges the Liv och Hälsa Foundation and the Academy of Finland (Grant No. 323240 and 331774 ) for financial support.
Publisher Copyright:
© 2022 The Authors
PY - 2022/5/1
Y1 - 2022/5/1
N2 - A novel conjugation of guar gum with xanthate groups via facile aqueous xanthation reaction has been reported. Density of grafted xanthate on guar gum product (GG-X) is as high as 4.4%, thus GG-X is conceivably characterized and confirmed by various spectrometric, electrochemical, thermogravimetric, and microscopic methods. Complexation of GG-X with numerous borderline and soft metal ions (e.g. Fe2+, Co2+, Ni2+, Cu2+, Pb2+, Pt2+ and Cd2+) yields hydrophilic gel-like materials and shows good agreement with hard and soft acid and base (HSAB) theory. This indicates tremendous potential of GG-X in metal ion extraction, removal and hydrogel cross-linking. GG-X is also employed to formulate an aqueous colloidal dispersion of copper sulfide covellite (GG-X/CuS) nanocomposites. GG-X therefore behaves as a surfactant, allowing formation of electronically conductive nanocomposites. XRD indicates apparent beneficial effects of GG-X in the synthesis of CuS with a crystallite size of 15.6 nm. This novel nanocomposite is a promising material for humidity sensing, showing reversible linear responses to relative humidity changes within 10 to 80% range. The interaction between GG-X and water might cause changes in electrical permittivity of GG-X/CuS nanocomposite and/or electrical hopping conductivity between CuS nanoparticles.
AB - A novel conjugation of guar gum with xanthate groups via facile aqueous xanthation reaction has been reported. Density of grafted xanthate on guar gum product (GG-X) is as high as 4.4%, thus GG-X is conceivably characterized and confirmed by various spectrometric, electrochemical, thermogravimetric, and microscopic methods. Complexation of GG-X with numerous borderline and soft metal ions (e.g. Fe2+, Co2+, Ni2+, Cu2+, Pb2+, Pt2+ and Cd2+) yields hydrophilic gel-like materials and shows good agreement with hard and soft acid and base (HSAB) theory. This indicates tremendous potential of GG-X in metal ion extraction, removal and hydrogel cross-linking. GG-X is also employed to formulate an aqueous colloidal dispersion of copper sulfide covellite (GG-X/CuS) nanocomposites. GG-X therefore behaves as a surfactant, allowing formation of electronically conductive nanocomposites. XRD indicates apparent beneficial effects of GG-X in the synthesis of CuS with a crystallite size of 15.6 nm. This novel nanocomposite is a promising material for humidity sensing, showing reversible linear responses to relative humidity changes within 10 to 80% range. The interaction between GG-X and water might cause changes in electrical permittivity of GG-X/CuS nanocomposite and/or electrical hopping conductivity between CuS nanoparticles.
KW - Covellite nanocomposite
KW - Gel-like materials
KW - Guar gum xanthate
KW - Humidity sensing
KW - Metal ion complexation
UR - http://www.scopus.com/inward/record.url?scp=85125436344&partnerID=8YFLogxK
U2 - 10.1016/j.ijbiomac.2022.02.132
DO - 10.1016/j.ijbiomac.2022.02.132
M3 - Article
C2 - 35219779
AN - SCOPUS:85125436344
SN - 0141-8130
VL - 206
SP - 105
EP - 114
JO - International Journal of Biological Macromolecules
JF - International Journal of Biological Macromolecules
ER -