The invention discloses an antibacterial fabric and a preparation method thereof and belongs to the technical field of
textile production. The hyperbranched
polymer obtained by modifying a quaternaryammonium salt structure is used for antibacterial finishing of fabrics, on one hand, the hyperbranched
polymer has high
solubility, the washing resistance is improved; on the other hand, long-chain
alkyl is introduced in the substitution process, the
cytotoxicity is reduced, and a hydrophobic group and a hydrophilic group deeply penetrate into lipid
layers and
protein layers of bacterial cells respectively, so that the antibacterial performance is enhanced. After an
epoxy group and a hydroxyl group of
starch produce etherification action, the long-acting
antibacterial property is formed, the performance of the fabric is improved, the plasticizing effect on the
fiber is achieved, the antibacterial efficiency is improved, the
plasticity and entanglement performance of the
fiber are improved,the
mechanical property and
toughness of the fabric are improved, and the antibacterial efficiency is also increased. The problem is solved that an antibacterial additive in an existing antibacterialfabric is high in
toxicity and has the influence on the
mechanical property of the fabric itself.