Abstract: A stability adjustment method for a carbon fiber epoxy resin sizing agent includes the following steps: adding a nonionic surfactant to the carbon fiber epoxy resin sizing agent until a HLB value of the system is 9.67-13.30, followed by ultrasonic dispersion, thereby obtaining a highly dispersed and stable carbon fiber epoxy resin sizing agent. The method significantly improves the stability of the carbon fiber epoxy resin sizing agent, which can reduce the formation of small latex particle sedimentation during transportation and storage, minimize surface defects on carbon fibers after sizing, and consequently enhance the application performance of carbon fiber-reinforced epoxy resin matrix composites.

Abstract: A method for preparing a water-soluble epoxy resin carbon fiber sizing agent is provided, belonging to the field of sizing agents. One end of the sizing agent is a hydrolyzable group, which can bind to a hydroxyl group (—OH) on a carbon fiber surface; the other end is a non-hydrolyzable group capable of reacting with a resin matrix. In this situation, functional groups from the sizing agent are introduced onto the carbon fiber surface, increasing the surface activity of the carbon fiber and consequently enhancing the chemical bonding between the carbon fiber and the resin matrix. Moreover, the sizing agent possesses excellent self-emulsifying capability, overcoming the stability issues associated with emulsion-type sizing agents. This self-emulsifying epoxy resin sizing agent is highly safe, environmentally friendly, convenient to use, and can be emulsified and used at a time selected according to processing requirements.

Abstract: Provided is a method for generating a song melody. The method includes: displaying a melody configuration page; acquiring melody attribute information selected based on the melody configuration page; displaying a melody generation button in a triggerable state on the melody configuration page in response to selection of the melody attribute information being completed; displaying a candidate melody page in response to a triggering operation on the melody generation button; and determining one or more selected candidate melodies from at least one candidate melody as a target melody.