Modified nano-zinc oxide heat-storage warm-keeping washable finishing agent and preparation method thereof

The invention belongs to the field of textile finishing agents, and particularly relates to a modified nano-zinc oxide heat-storage warm-keeping washable finishing agent and a preparation method thereof. The invention provides a modified nano-zinc oxide heat-storage warm-keeping washable finishing agent. The finishing agent is prepared from the following raw materials in parts by mass: 20-50 parts of nano-zinc oxide, 1-5 parts of a coupling agent, 0.2-2 parts of a dispersing agent, 1-3 parts of coating resin, 0.1-2 parts of a defoaming agent, 0.5-3 parts of a chain extender and 40-75 parts of water. The stability of nano-zinc oxide in textile finishing is effectively improved, the obtained finishing agent has excellent storage stability and finishing effect, particles are prevented from falling off in the washing process, the durability of high heat storage far infrared emissivity and antibacterial ability of textiles is maintained, washing resistance is good, and the textile finishing agent is suitable for i