Preparation of quaternized nanoxylan and its inhibitory effect on wood mildew.

At present, heavy metal pollution is common in wood antibacterial agents, making it necessary to develop environmentally friendly antibacterial agents. Extract and prepare nano xylan (XYL) from corn stover. The optimal process was obtained through response surface optimization: 59 °C, 2 h, alkali concentration of 3 %. The particle size can reach 10 nm, and its small size and high specific surface area help to improve the antibacterial effect. Preparation of epoxy quaternized nano xylan (QX) and hydroxypropyl quaternized nano xylan (CX) using 2,3-epoxypropyl trimethylammonium chloride (EPTA) and 3-chloro-2-hydroxypropyl trimethylammonium chloride (CHMAC) as quaternization reagents. The synthesis of QX and CX was validated through characterization using nuclear magnetic resonance, infrared spectroscopy, and other techniques. The prepared antibacterial agent was coated on the surface of the wood sample to test its antibacterial effect. According to Chinese national standards, antibacterial agents have good inhibitory effects on two types of fungi (Aspergillus niger, Lasiodiplodia theobromae), with a control efficacy of 99 % for QX. The antibacterial agent prepared by this method fills the gap in the application of quaternized nano xylan in wood antibacterial.