Eco-friendly functionalization of natural halloysite clay nanotube with ionic liquids by microwave irradiation for Suzuki coupling reaction

Direct chemical grafted curcumin on halloysite nanotubes as dual-responsive prodrug for pharmacological applications

“…In order to obtain dual stimuli-responsive prodrugs, halloysite scaffold bearing a GSH-responsive disulphide bond was synthesized (Scheme 1). As described elsewhere [44], pristine halloysite was modified in f-HNT-SH 1, which was covalently linked to cysteamine hydrochloride 2 (Scheme 1).…”

“…The UV-vis absorption spectrum of HNT-Cur sample (See Compared to pristine HNT [44], HNT-Cur exhibits the vibration bands for C H stretching of methylene groups around 2960 cm −1 and 2865 cm −1 ( Fig. S.2).…”

“…They were used as purchased without further purification. f-HNT-SH 1 was synthesized as previously reported [44].…”

Halloysite nanotubes loaded with peppermint essential oil as filler for functional biopolymer film

“…Halloysite possesses a positive alumina inner lumen and a negative silica outer surface allowing its selective functionalization (Arcudi et al, 2014;Cavallaro, Lazzara, & Milioto, 2012), the formation of a liquid crystalline phase (Luo et al, 2013) and the encapsulation of chemically and biologically active compounds Lvov, Shchukin, Möhwald, & Price, 2008;Lvov, Wang, Zhang, & Fakhrullin, 2016;Lvov, DeVilliers, & Fakhrullin, 2016;Shutava, Fakhrullin, & Lvov, 2014;), such as drugs (Aguzzi, Cerezo, Viseras, & Caramella, 2007;Lun, Ouyang, & Yang, 2014), natural molecules (Massaro, Piana et al, 2015), marine biocides (Wei et al, 2014), cosmetics (Suh et al, 2011), and other functional agents (Abdullayev, Price, Shchukin, & Lvov, 2009). HNT are suitable as catalytic supports (Machado, de Freitas Castro, Wypych, & Nakagaki, 2008;Massaro et al, 2014;, adsorbent nanomaterials for wastewater decontamination (Szczepanik & Słomkiewicz, 2016;Zhang et al, 2016), and nanofiller for sustainable packaging (Liu, Wu, Jiao, Xiong, & Zhou, 2013;Tescione, Buonocore, Stanzione, Oliviero, & Lavorgna, 2014). Research reports (Gorrasi, 2015;Lee & Park, 2015) that pristine HNT exhibited an excellent essential oils solubilization ability as well as controlled release of properties.…”

Advances in Organic and Organic-Inorganic Hybrid Polymeric Supports for Catalytic Applications

“…Halloysite, a double-layered aluminosilicate mineral that has a predominantly hollow tubular structure, has been also used as support for ionic liquid (IL) phase-based materials. External surface functionalization of halloysite nanotubes (HNTs) with ILs was achieved through grafting of 3-mercaptopropyl trimethoxysilane by microwave irradiation, followed by anchorage of 3-octyl-1-vinylimidazolium bromide via thiol-ene reaction (Scheme 56) [90,91]. MW irradiation allowed obtaining high loading onto the HNTs surface compared to those obtained through conventional synthesis.…”