The invention relates to the technical field of medical auxiliary articles and discloses a novel micro-power negative pressure liquid-absorbing
nursing wound material which comprises a
sponge layer and a dense layer; the dense layer is arranged on one surface of the
sponge layer. The invention also discloses a preparation method of the novel micro-power negative pressure liquid-absorbing
nursing wound material. The preparation method comprises the following steps: 1, dissolving
polyvinyl alcohol,
carboxymethyl chitosan,
purified water,
sulfuric acid and
formaldehyde according to a specific ratio, a specific program and conditions for synthesis, and preparing to obtain a PVA
reaction system solution, 2, preparing the PVA
reaction system solution into medical
sponge with the dense layer on one surface with a
precipitation method or a
coating method according to a specific condition; 3, cleaning and centrifugally
dewatering the medical sponge, and then carrying out
drying treatment or vacuum freezing treatment for
drying; and 4, fixing and compressing the medical sponge, and finally
cutting the medical sponge into slices for formation. By adopting the novel micro-power negative pressure liquid-absorbing
nursing record material provided by the invention, by adding the dense layer as a
barrier layer, liquid leakage and wound
pollution are effectively prevented; and dry-state soft sponge enables the liquid-absorbing degree and speed to be more increased to form micro-power negative pressure. The preparation method provided by the invention is simple to operate and strong in product applicability and is suitable for application and development of clinical medicines.