The application of sulfonated tetraphenyl calix[4] resorcinarene as a novel, multi-functional and eco-friendly ligand in zirconium tanning system

Li, Wenbo; Ma, Jianzhong; Zhou, Yongxiang; Sun, Xubin; Gao, Dangge

doi:10.1016/j.jclepro.2020.124337

Cited by 14 publications

(2 citation statements)

References 19 publications

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“…The tensile strength and elongation at break of DPA-tanned leather were better compared with the standard values (12 MPa). 38 The tensile strength (19.73 MPa) and elongation at break (107.87%) of DPA-tanned leather were higher than those of chrome-tanned leather or zirconium-tanned leather. However, the hydrothermal shrinkage temperature of the DPA-tanned leather was 79 °C.…”

Section: Resultsmentioning

confidence: 89%

Optimization of dialdehyde soluble soybean polysaccharide: preparation by response surface methodology for cleaner leather tanning

et al. 2022

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Section: Resultsmentioning

confidence: 89%

Optimization of dialdehyde soluble soybean polysaccharide: preparation by response surface methodology for cleaner leather tanning

et al. 2022

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“…Note that the remaining proportion (i.e., 30−40% of the chrome tanning agent) goes into the effluent, affecting the growth and safety of crops. 8 In an effort to control chromium-based tanning pollution, other types of chrome-free tanning agents (e.g., surfactants, synthetic/natural oils, chemical auxiliaries, aldehyde tanning agents, 9 and zirconium tanning agents 10 ) have been developed as alternative options. Nevertheless, these chrome-free tanning agents still suffer from a lower tanning performance relative to traditional chrome tanning (e.g., in terms of shrinkage temperature (Ts) and chemical stability).…”

Section: ■ Introductionmentioning

confidence: 99%

Potential Applicability of Mg/Al-Layered Double Hydroxide (LDH) for Environmentally Friendly Chromium-based Leather Tanning

Zhao

Gao

Zhang

et al. 2023

ACS Sustainable Chem. Eng.

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In this work, a highly efficient tanning agent was developed by combining magnesium–aluminum-layered double hydroxide (MgAl-LDH) with different Mg:Al molar ratios and 2% chrome (MgAl-LDH-2%Cr composite). MgAl-LDH-2% Cr (at 1 Mg:1 Al molar ratio for a 4-hour aging period) showed a much higher leather shrinkage temperature (Ts) of up to 93.8 °C upon tanning than a bare 2% chrome tanning agent (74.2 °C). The use of MgAl-LDH-2%Cr in the tanning process was also environmentally friendly, as it helped reduce the leaching amount of chromium ions in the tanning effluent (e.g., from 99.6 to 35.0 mg L–1), accompanied by the reduction of BOD5 and COD-Cr by 67% and 46%, respectively (relative to the conventional chrome tanning process). The improved tanning effects can possibly be accounted for by the adsorption of a positive chromium complex onto MgAl-LDH laminates with hydroxyl groups to obtain a better tanning effect through the penetration of chromium into skin collagen fibers.

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An Adaptive Resorcinarene Hemicarcerand

Danielsiek

Dyker

2021

Eur J Org Chem

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A new resorcinarene‐based hemicarcerand was developed, exhibiting pronounced flexibility in size and shape to accommodate several guest molecules. With a series of seven hemicarceplexes, investigated via single‐crystal XRD, the cage molecule showed to align its guests to complement their electrostatic potentials and to adjust its dimensions, according to the guest molecule‘s demand. Though forming equimolar inclusion complexes with most guests, crystallization from chloroform, and benzonitrile produced hemicarceplexes with a guest/host ratio of 2 : 1, exhibiting packing coefficients as high as 91 %. In competition experiments, the hemicarcerand clearly favors p‐xylene over m‐xylene: The host shows to crystallize, solely incarcerating p‐xylene from a 1 : 1 mixture of the two xylenes, and also isolates p‐xylene from the mixture via amorphous precipitation.

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The application of sulfonated tetraphenyl calix[4] resorcinarene as a novel, multi-functional and eco-friendly ligand in zirconium tanning system

Cited by 14 publications

References 19 publications

Optimization of dialdehyde soluble soybean polysaccharide: preparation by response surface methodology for cleaner leather tanning

Optimization of dialdehyde soluble soybean polysaccharide: preparation by response surface methodology for cleaner leather tanning

Potential Applicability of Mg/Al-Layered Double Hydroxide (LDH) for Environmentally Friendly Chromium-based Leather Tanning

An Adaptive Resorcinarene Hemicarcerand

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