Ultrafine Grinded and Silane Grafted Iron Ore Tailings as Reinforcing Filler of Styrene Butadiene Rubber

Abstract

In order to realize the high value-added resource utilization of solid waste and reduce the cost of rubber manufacturing, iron ore tailings (IOTs) were used as raw material to prepare a reinforcing filler of rubber through ultrafine grinding and surface organic modification techniques. We studied the effects of ball mill grinding conditions on the particle size and distribution of grinded iron ore tailings (G-IOTs). The effects of bis-(triethoxy-silyl-propyl)-tetrasulfide (Si69)-modified G-IOT (Si69-G-IOT) loading levels on the cure characteristics, static mechanical and dynamic mechanical properties of the styrene butadiene rubber (SBR) composites were also explored in this paper. The grinding and modification mechanism of IOTs and the combination of filler and SBR matrix were explored by grinding simulation of population balance model, X-ray diffraction analysis, Fourier transform infrared spectroscopy and scanning electron microscopy. The results showed that when grinding IOTs at 2000 r/min for 150 min, the particle size distribution of the resulting G-IOTs was the narrowest, with a D90 value of 4.42 μm. The tensile strength and elongation at break of SBR filled with 120 phr Si69-G-IOT were 14.97 MPa and 596.36%, respectively.

Preparation of Iron Ore Tailings-Based Superhydrophobic Coatings

“…As a kind of bulk solid waste, coarse-grained iron ore tailings were widely used as sand and stone material for construction and produced glass ceramics [23,24], porous ceramsite [25], cement clinker [26]. However, the high value-added industrial utilization of microfine iron ore tailings has become an urgent problem that needs to be solved [27]. Because of the similar composition between iron ore tailings and clay, microfine iron ore tailings may be an ideal skeleton material for developing superhydrophobic coatings to further improve its application value.…”

Study on Increasing the Binding Amount of Rubber and Reinforcing Filler by Adding Aromatic Solvent Oil

“…There are many types of reinforcing filler in rubber, mainly including carbon black (CB) [10], white carbon black (WCB, also be called as Silica) [11], metal oxides [12], some organic compounds [13], rubber powder [14], recycled rubber [15], and short fibers [16]. Shi et al [17] investigated the Payne effect of CB-filled natural rubber (NR) compounds under large strain amplitudes, and proved that low temperature and high frequency accelerate the Payne effect.…”