Combined treatments of fiber surface etching/silane-coupling for enhanced mechanical strength of aramid fiber-reinforced rubber blends

Influences of fiber fibrillation degree on mechanical and tribological performances of aramid fiber/nitrile rubber composites

“…(1) increasing the chemical activity, [17][18][19][20][21] and (2) improving the surface roughness of the fiber. The typical methods of the chemical activity improvement include chemical grafting 17,22,23 and resorcinol-formaldehyde-latex (RFL) coating on the surface of the fiber. 21,[24][25][26] However, the effects of these AF treatments are related to the type of the rubber matrix.…”

“…Besides the weak connection between the fiber and the rubber matrix, the large modulus difference between these two phases leads to accelerated interface failure when the composite is under external load. The adhesion between the fiber and the matrix can be improved through two ways: (1) increasing the chemical activity, 17–21 and (2) improving the surface roughness of the fiber. The typical methods of the chemical activity improvement include chemical grafting 17,22,23 and resorcinol‐formaldehyde‐latex (RFL) coating on the surface of the fiber 21,24–26 .…”

Preparation of aramid-based epoxy resin from low-grade aramid

“…[10][11][12][13] However, aramid ber is usually incompatible with epoxy resin at the interface and has low surface roughness 14,15 because the molecular structure of aramid usually has an unbranched main chain and lack of active groups, which can make its surface of aramid highly ordered. Therefore, it is necessary to modify aramid in preparing functional aramid ber by physical methods such as coating, 16,17 plasma, 18,19 highenergy rays, 20,21 supercritical uid method, 22 or by chemical methods including copolymerization, 23,24 surface etching, 25 or surface graing. [26][27][28][29] A certain amount of aramid ber is labeled as low-grade in the process of polymerization when the molecular weights of the aramid polymers fail to meet the spinning requirements, which was inuenced by various factors such as raw materials, equipment, or operation technologies.…”

“… 10–13 However, aramid fiber is usually incompatible with epoxy resin at the interface and has low surface roughness 14,15 because the molecular structure of aramid usually has an unbranched main chain and lack of active groups, which can make its surface of aramid highly ordered. Therefore, it is necessary to modify aramid in preparing functional aramid fiber by physical methods such as coating, 16,17 plasma, 18,19 high-energy rays, 20,21 supercritical fluid method, 22 or by chemical methods including copolymerization, 23,24 surface etching, 25 or surface grafting. 26–29 …”

Modification Mechanism and Rheological Properties of Emulsified Asphalt Evaporative Residues Reinforced by Coupling-Modified Fiber

“…The surface modification of fibers can improve the exchange between fibers and matrix materials, improve the wettability of basalt fibers, form new chemical bonds with the matrix, and ultimately improve the performance of fiber composites. Silane coupling agent, as an organosilicon compound with two groups at the same time, can tightly connect two types of substances with different properties and is of great significance to material surface modification and material bonding, for making the combination of BF and emulsified asphalt closer, as well as ultimately improving the interfacial bonding performance of BF and emulsified asphalt [ 21 , 22 ]. M. Iorio et al [ 23 ] modified the BF surface to improve the basalt/cement interface in cement-based composites.…”