The invention discloses a
wool knitted suede
machine washable bio-based fabric and a preparation method thereof. According to the fabric, merino
wool and bio-based nylon are blended to serve as raw materials, grey cloth is woven through a circular knitting
machine and subjected to fulling milling treatment, then CO2
plasma is adopted for activating the
wool fiber surface, and carboxyl and other polar groups are introduced to the
wool fiber surface; then hydroxyl-terminated
silicone oil reacts with the carboxyl, a uniform shrink-proof film is formed on the surface of the
wool fiber, meanwhile, hydroxyl in the hydroxyl-terminated
silicone oil can generate
hydrogen bond or chemical action with the
end group of the bio-based nylon, and therefore cross-
fiber combination is constructed between the wool and the bio-based nylon. According to the invention, wool scales are effectively inhibited from being interlocked, the shrink resistance is obviously improved, and the interfacial compatibility of wool and bio-based nylon is enhanced, so that the fabric still keeps excellent dimensional stability and suede hand feeling under the condition of multiple times of
machine washing. The method is green and environment-friendly, the process is simple and convenient, and the obtained fabric meets the machine washable and bio-based environment-friendly requirements.