Self-healing of Poly(2-hydroxyethyl methacrylate) Hydrogel through Molecular Diffusion

Soft Materials by Design: Unconventional Polymer Networks Give Extreme Properties

“…Besides weak physical and dynamic covalent cross-links (i.e., reversible cross-links), the self-healing of hydrogels can also be achieved through interdiffusion of polymer chains to form entangled chains that span the crack surfaces (Figures 28a,c). 865,866 In fact, self-healing processes in hydrogels mostly involve both mechanisms of chain entanglement and reversible cross-linking. 867 Notably, when the surfaces of two intact self-healing hydrogels are brought in contact under certain conditions such as specific temperature and pH, an adhered interface can also be formed between the two hydrogels.…”

“…The commonly used cross-links for self-healing of hydrogels include weak physical cross-links such as hydrogen bonds, ,,, ionic bonds, ,, metal coordinations, ,, hydrophobic interactions, and guest–host interactions, and dynamic covalent bonds such as olefin metathesis. , Once two newly formed surfaces in a damaged hydrogel are brought into contact with each other under certain conditions such as specific temperature and pH, new cross-links can form on the interface, endowing the hydrogel with the self-healing capability (Figures a,c). Besides weak physical and dynamic covalent cross-links (i.e., reversible cross-links), the self-healing of hydrogels can also be achieved through interdiffusion of polymer chains to form entangled chains that span the crack surfaces (Figures a,c). , In fact, self-healing processes in hydrogels mostly involve both mechanisms of chain entanglement and reversible cross-linking …”

Non-seismic Geophysical Prospecting Model of Beiya Gold Mine in Western Yunnan Province

“…Regional geological map of west Yunnan China (modified after Regional Geology of Yunnan Province, 1990) In the mining area, there are many tensional and tensional faults, including the NE, NS and WE directions. NE and near the North-South faults are a pre-mine fracture and contemporaneous faults, which are the channel for alkali-rich magma intrusion and fluid migration and also an important ore-bearing structure (Sirajuddin et al 2015). It controls the spatial distribution of rock mass and the mineralization scale.…”

“…1-Quaternary Pleistocene Series breccia; 2-Neogene fluvial-lacustrine sediments; 3-Middle Triassic Beiya Formation, 4th member dolomite; 4-Middle Triassic Beiya Formation, 3th member dolomite; 5-Middle Triassic Beiya Formation, 1th and 2th member limestone; 6-Lower Triassic Qingtianbao Formation; 7-Emeishan basalt; 8-Himalayan quartz-orthophyre; 9-Lamprophyre dike; 10-Orthophyre; 11-Fill-in type orebody; 12-Skarn type orebody; 13-Residual and diluvial type orebody; 14-Fault; 15-Drill hole Based on the strata, structure, magmatite ore characteristics, mineralization characteristics and metallogenic mechanism, Beiya type gas-liquid metasomatic mineralization and skarn type copper-gold ore deposit prospecting marks are summed up as 'tectonic rock control and mineralization by rock masses, where tectonics, rock masses and stratum are combined as one' (Sirajuddin et al 2015). The fault tectonics affects the intrusive position of the rock mass and the contact between the rock mass and the surrounding rock generates the Fe-Au polymetallic mineralization, which is the prospecting mark geologically.…”