Surface organo-functionalization of palygorskite nanorods with γ-mercaptopropyltrimethoxysilane

Preparation and MRI performance of a composite contrast agent based on palygorskite pores and channels binding effect to prolong the residence time of water molecules on gadolinium ions

“…S1a † shows the XPS survey spectrum of the composite. In addition to Si, Mg and Al elements in PAL, 33 the peaks with binding energies at 284, 531 and 1218 eV can be found, which corresponding to C 1s, O 1s and Gd 3d, respectively. The presence of C, O and Gd on the sample surface indicates that TA–Gd coordination polymer layer is successfully loaded on the surface of PAL.…”

Surface Modification of Attapulgite Nanorods with Nitrile Butadiene Rubber via Thiol–Ene Interfacial Click Reaction: Grafting or Crosslinking

“…The ATP-SH nanorods were prepared via the surface silylation of ATP nanorods with MPS, as reported previously. 18 Typically, 2.00 g of ATP nanorods were dispersed into 40 mL of absolute ethanol with ultrasonication for 2 h. Then, 0.20 mL of MPS was added, and the mixture was refluxed with stirring for 8 h. After the reaction, the product was separated by centrifugation (10 000 rpm for 8 min) and washed with ethanol by ultrasonicating for 30 min. After the centrifugation-washing cycles were repeated three times, the product was dried at 40 °C for 24 h.…”

“…■ RESULTS AND DISCUSSION Surface Silylation. In the surface silylation of ATP nanorods with γ-mercaptopropyltrimethoxysilane (MPS), the ATP nanorods were modified with a low amount of MPS, in order to avoid the welding effect as far as possible, 18 which have resulted in covalent aggregation and decreased subsequently the dispersibility of the functionalized ATP nanorods. The strong characteristic absorbances around 480 and 1000 cm −1 in the FT-IR spectrum of the pristine ATP nanorods were attributed to the bending vibration of the Si− O−Si bond in the ATP framework.…”

Ultralight and Hydrophobic Palygorskite-based Aerogels with Prominent Thermal Insulation and Flame Retardancy

“…The composite aerogel possessed better mechanical properties than that of layered clay. Palygorskite (Pal) is a kind of natural nanorod clay (20–70 nm in diameter and 1–5 μm in length) with plenty of surface–OH groups. , Because of unique colloidal properties and good elasticity, Pal is an excellent candidate to upgrade polymer performance and reduce costs remarkably in making aerogel. It also has been successfully used as an reinforcement to prepare monolithic silica aerogel with ultralow density and excellent thermal insulation …”