The invention discloses an environmentally friendly impregnation system for fiber surface treatment and a preparation method thereof, and an impregnation treatment method. The environmentally friendly impregnation system for fiber surface treatment of the invention includes hydroxyacrylic resin, amino resin, epoxy resin, blocked isocyanate, accelerator, rubber latex, and deionized water. Depending on the type of fiber and its application, the invention allows for the selection of one-step impregnation treatment or two-step impregnation treatment. The invention can effectively replace the use of toxic raw materials and intermediates in traditional RFL impregnation system, reducing harm to human health and the environment while achieving the adhesion level of RFL treatment.

A method of treating a sunflower plant stem is disclosed. The method comprises the steps of: selecting a sunflower plant, removing the flower head and leaves from the stem and preparing the stem for enzymatic treatment by slitting the stem lengthways, removing the inner core from the stem; a) treating the cut stem with a pectinase containing a first buffer solution, for 24 hours with shaking at a pH of 3.8-8.5, and at a temperature of from 20-60 C.; b) removing the stem and washing with water, c) placing the stems into a second buffer solution containing xylanase, at a pH of from 7.0-8.0 and at a temperature of from 37-50 C. for 24 hours with shaking; d) removing the stems and washing with water e) placing the stems into a third buffer solution containing feruloyl esterase, at a pH of 7.2-8.0 containing 0.01-0.05% feruloyl esterase, at a temperature of from 37-50 C. for up to 24 hours, f) removing the stems and washing with water, g) pressing the stems to remove unwanted plant matter.

A method of treating a sunflower plant stem is disclosed. The method comprises the steps of: selecting a sunflower plant, removing the flower head and leaves from the stem and preparing the stem for enzymatic treatment by slitting the stem lengthways, removing the inner core from the stem; a) treating the cut stem with a pectinase containing a first buffer solution, for 24 hours with shaking at a pH of 3.8-8.5, and at a temperature of from 20-60 C.; b) removing the stem and washing with water, c) placing the stems into a second buffer solution containing xylanase, at a pH of from 7.0-8.0 and at a temperature of from 37-50 C. for 24 hours with shaking; d) removing the stems and washing with water e) placing the stems into a third buffer solution containing feruloyl esterase, at a pH of 7.2-8.0 containing 0.01-0.05% feruloyl esterase, at a temperature of from 37-50 C. for up to 24 hours, f) removing the stems and washing with water, g) pressing the stems to remove unwanted plant matter.