Thiol-rich and ion-imprinted alginate hydrogel as a highly adsorptive and recyclable filtration membrane for rapid and selective Sr(II) removal

Zheng, Biao; Yin, Jun; Zhu, Lingdan; Bin, Zhou; Shen, Hang; Harbottle, David; Hunter, Timothy N.; Yu, Shaoming; Zhu, Deqin; Zhang, Huagui

doi:10.1016/j.cej.2023.142752

Cited by 9 publications

(1 citation statement)

References 60 publications

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“…As shown in Figure D, the lacquer film cured with laccase (and stored for 6 months) has a water contact angle of 78.5°, consistent with the former reports. , Compared with the lacquer film, all the UPTs show a decrease of water contact angle, indicating improved hydrophilicity, which can be explained by the introduction of polar carbamate functions. For UPs that may possess excess mercapto functions (i.e., UPT2), the contact angle further decreases to around 55 °C, which is believed to be a result of enhanced hydrophilicity introduced by the presence of more polar ester groups and more inherent hydrophilic −SH groups. , The enrichment of mercapto functions also allows for further modifications such as secondary thiol–ene clicks to graft other moieties, or application as heavy or radioactive metal adsorbents with promising adsorption ability. , …”

Section: Resultsmentioning

confidence: 99%

Transparent and Thermally Stable Urushiol Films by Fast Thiol–ene Curing

Shen

Zhang

2023

ACS Appl. Polym. Mater.

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Lacquer is well recognized in the coating industry thanks to its excellent performance, artistic value, and renewable properties. However, there exists difficulty in curing thick lacquer film due to its dark color attributed to the phenol oxidation and the inertness of internal double bonds that are persistent in the cured films, which also reduces the thermal stability of the obtained film. Meanwhile, the slow manual curing process also limits its largescale commercial use. To address the issues, in the current study, urushiol−urethane prepolymers were synthesized, characterized, and adopted as the foundation for transparent and thick lacquer film preparation through a fast and green thiol−ene click reaction with polymercaptan. By this mild and readily implemented method, flexible and transparent networked films based on renewable urushiol can be obtained with almost no film shrinkage. Moreover, the cross-linking density, modulus, and hydrophobicity of the films are also alterable, as validated by the differential scanning calorimetry, contact angle, and rheological measurements. More interestingly, the functionalization by mercapto groups not only stabilizes the double bonds remaining in the cured urushiol films but also endows the films with a good hydrophilicity. The high moduli of these films can be retained after repeated distortion under high temperatures, exhibiting an excellent thermal stability, which is incomparable with those of traditional lacquer films. Moreover, the urushiol-urethane prepolymer was demonstrated to well copolymerize with styrene as a macro-cross-linker for good film formation, exploring the application generality of this approach.

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