Bionic dry-wet adhesive force self-adjusting dressing and preparation method and application thereof

Abstract

The invention discloses a bionic dry-wet adhesive force self-adjusting dressing. The bionic dry-wet adhesive force self-adjusting dressing comprises the following components in parts by weight: 7-8 parts of styrene-isoprene-styrene block copolymer; 5-6 parts of high molecular weight polyisobutene; 10-12 parts of low molecular weight polyisobutene; 4-5 parts of tackifying resin; 0.5-0.7 part of anti-aging agent; 3-3.5 parts of naphthenic oil; 11-13 parts of sodium carboxymethyl cellulose; 3-3.5 parts of chitosan; and 3.2-5.5 parts of microcrystalline cellulose; the size of the microcrystalline cellulose is 20-50 [mu]m. According to the bionic dry-wet adhesive force self-adjusting dressing of the invention, due to addition of the microcrystalline cellulose, and the size and the shape of the dressing basically remain unchanged after the dressing is in contact with the surface of a wound due to hydrophobic and water-guiding effects of the microcrystalline cellulose, the hardness of the dressing after moisture absorption is improved, and the adhesive force of the dressing after moisture absorption is further improved; different adhesive forces are shown according to different dryness and wetness of the contact surface, so that the problem that the dressing is easy to soften and lose viscosity after absorbing moisture is solved, and the experience feeling of a patient is improved.

Description

technical field [0001] The invention relates to the field of polymer medical materials, in particular to a bionic dressing with self-regulating dry and wet adhesion and its preparation method and application. Background technique [0002] In recent years, with the continuous spread of infectious diseases in the world, the increasing demand for nursing care of the aging population, the continuous improvement of the domestic medical system, the improvement of residents' health awareness and consumption level, the scale of China's medical dressing market has shown a rapid growth trend. Medical dressing is a material that can temporarily replace damaged skin and provide an effective barrier and wound healing environment for the body. Therefore, the research on medical dressing has always been the key to wound healing research. With the continuous development of science and technology, people realize that the purpose of using dressings is not only to cover wounds, but also to hel...

AI Technical Summary

Problems solved by technology

[0004] However, the hydrophilic particles are easy to swell and deform after absorbing the exudate, making the dressing soft and easy to lose stickiness, difficult to maintain the original shape, and easy to reduce the patient's experience

Therefore, in order to solve this problem and meet the needs of users, it is extremely challenging to prepare dressings with controllable dry and wet adhesion and not easy to deform after absorbing liquid.

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