Fabrication and performance of a polyurethane hybrid composite with waste red mud

Abstract

Polyurethane-based organic-inorganic hybrid composite is attracting increasing attention due to its excellent performance and low cost. Herein, a facile and effective strategy has been proposed for the fabrication of polyurethane/red mud hybrid composite by anchoring red mud particles into a polyurethane frame. The resulting hybrid composite was mainly composed of amorphous polyurethane and crystalline red mud, and its probable formation mechanism was proposed. The polyurethane/ red mud composite with micron particles uniformly embedded into the organic phase exhibited satisfactory mechanical performance, and its compressive and flexural strength could come up to 38.6 and 12.4 MPa after complete curing, respectively. Moreover, the hybrid composite displayed impressive thermal stability, flame retardancy, storage stability, and reinforcement performance. The obtained polyurethane/red mud composite shows potential applications in multiple fields (roadway, dam, underground engineering, etc.). POLYM. COMPOS., 40:2424-2431, 2019

Effects of different catalysts on the structure and properties of polyurethane/water glass grouting materials

“…Figure shows the XRD patterns of the grouting materials containing different catalysts. Their main phases observed after the curing reaction are as follows: the PU matrix at 2θ = 20°; polysilicic acid particles at 2θ = 29.1°, 33.8°, and 36.9°; Na 2 CO 3 at 27.9°, 31.7°, 40°, 45.5°, and 51.3°; and NaHCO 3 at 2θ = 30.4°, 44.6°, and 52.5° . It should be noted that the peaks corresponding to the polysilicic acid, Na 2 CO 3 , and NaHCO 3 phases are very sharp, indicating their highly crystalline morphologies.…”

Polyurethane: Recent Engineering Contributions

“…A PU and red mud composite, the mud in micron particles uniformly embedded in PU, exhibited satisfactory mechanical performance and the compressive and flexural strength are, after complete curing, up to 38.6 and 12.4 MPa. It also displayed very good thermal stability, flame retardancy, storage stability, and reinforcement [60]. The heat conducting with focus on the enhancement of thermal conductivity of WPU composites through compatibility and feasibility of hybrid techniques is reviewed [61].…”

Mechanism Confirmation of Organofunctional Silanes Modified Water Glass/Polyurethane-Urea Composites for Remarkably Enhanced Mechanical Properties

“…Polyurethane-urea is widely used as grouting materials in the mining industry [1][2][3][4] , building foundation reinforcement [5][6][7] and road maintenance [8][9][10][11][12] , because of its excellent characteristics in terms of e cient performance and easy operation. However, it is found that the high cost, high heat release and ammability of polyurethane-urea production limit its application.…”