阅读说明：本技术 一种使用柳木皮下脚料制备高强度改性纤维的方法 (Method for preparing high-strength modified fiber by using willow bark leftover ) 是由 余国海 于 2019-08-15 设计创作，主要内容包括：本发明主要涉及废旧木材下脚料加工技术领域,公开了一种使用柳木皮下脚料制备高强度改性纤维的方法,包括：粉碎、蒸煮、柔化、帚化、强化；本发明提供的使用柳木皮下脚料制备高强度改性纤维的方法,将废弃的柳木皮进行回收利用制备得到的纤维质强度高,更加柔软耐用,制备过程中不使用强酸和强碱,能够有效节约资源,保护环境；先将柳木皮下脚料进行回收、粉碎,并除去颗粒型杂质,能够保护机器,便于后期处理,提高处理效果；粉碎后对柳木皮进行高温高压蒸煮,通过高温和高压处理,使水分快速进入柳木皮,能够减小柳木皮硬脆性,增加柔韧性。(The invention mainly relates to the technical field of waste wood leftover processing, and discloses a method for preparing high-strength modified fiber by using willow bark leftovers, which comprises the following steps: pulverizing, steaming, softening, brooming, and strengthening; according to the method for preparing the high-strength modified fiber by using the willow bark leftover, the fiber prepared by recycling the waste willow bark is high in strength, softer and durable, strong acid and strong alkali are not used in the preparation process, resources can be effectively saved, and the environment is protected; firstly, the willow bark leftovers are recovered and crushed, and granular impurities are removed, so that the machine can be protected, the later-stage treatment is facilitated, and the treatment effect is improved; the willow bark is subjected to high-temperature and high-pressure cooking after being crushed, and water rapidly enters the willow bark through high-temperature and high-pressure treatment, so that the hard brittleness of the willow bark can be reduced, and the flexibility is increased.)

1. A method for preparing high-strength modified fiber by using willow bark leftovers is characterized by comprising the following steps:

(1) pulverizing, collecting willow bark leftover, pulverizing to 3 ~ 10cm, and cleaning silt to obtain pulverized material;

(2) cooking, namely putting the crushed material into a container, adding water to immerse the crushed material, heating to 80 ~ 90 ℃, preserving heat for 10 ~ 15min, continuously heating to 120 ~ 130 ℃, preserving heat for 30 ~ 40min, taking out, draining water to obtain a cooked material;

(3) softening, namely putting the cooked material into a fiber beating machine, beating for 25 ~ 30min, putting into tyrosol solution, carrying out heat preservation treatment at 50 ~ 60 ℃ for 3 ~ 4h, and cleaning to obtain a softening material;

(4) brooming: brooming the softening material by using a broom fin according to a traditional method, and draining to obtain the broomed material;

(5) strengthening, namely placing the brooming material in strengthening liquid, soaking for 130 ~ 160min at 60 ~ 70 ℃ under the heat preservation condition, taking out, then placing in modified nano titanium dioxide dispersion liquid, heating to 105 ~ 110 ℃, soaking for 30 ~ 40min under the heat preservation condition, taking out, cleaning, and drying until the water content is 8 ~ 10%, thus obtaining the high-strength modified fiber.

2. The method for preparing high-strength modified fiber by using willow bark leftover material according to claim 1, wherein the tyrosol solution in the step (3) is added into the sodium bicarbonate solution with stirring, and after the tyrosol solution is completely added, the temperature is heated to 50 ~ 60 ℃, and the temperature is kept for standby.

3. The method for preparing high-strength modified fiber by using willow bark leftover material according to claim 2, wherein the mass percentage concentration of the sodium bicarbonate solution is 3 ~ 4%.

4. The method for preparing the high-strength modified fiber by using the willow bark leftovers according to claim 1, wherein the strengthening solution in the step (5) comprises, by weight, 2.4 parts of nipagin ester, 2.4 ~ 2.6.6 parts of lipoic acid, 1.1 ~ 1.3.3 parts of ethanol, 50 ~ 55 parts of sodium tripolyphosphate, 5 parts of 5 ~ 7 parts of sodium tripolyphosphate and 110 ~ 120 parts of water, and the preparation method of the strengthening solution comprises the steps of adding the nipagin ester and the lipoic acid into the ethanol while stirring to obtain an ethanol solution, adding the sodium tripolyphosphate into the water, stirring until the sodium tripolyphosphate is completely dissolved to obtain an aqueous solution, adding the ethanol solution into the aqueous solution, and fully stirring and mixing to obtain the strengthening solution.

5. The method for preparing high-strength modified fiber by using willow bark leftovers according to claim 1, wherein the modified nano titanium dioxide dispersion solution of the step (5) has a concentration of the modified nano titanium dioxide of 10 ~ 15%, and the method for preparing the modified nano titanium dioxide comprises the steps of placing anatase type nano titanium dioxide in a reaction kettle, heating to 220 ~ 240 ℃ at a speed of 4 ~ 5 ℃/min, keeping the temperature for 20 ~ 25min, naturally cooling to 70 ~ 80 ℃, adding an acetic acid solution with the same weight as the nano titanium dioxide into the reaction kettle in a stirring manner, stirring until the acetic acid solution is free of moisture, adding polyoxyethylene with the weight of 0.7 ~ 0.9.9% of the nano titanium dioxide, keeping the temperature, and stirring until the polyoxyethylene is uniformly mixed, thereby obtaining the modified nano titanium dioxide.

6. The method of claim 5, wherein the volume fraction of the acetic acid solution is 2 ~ 3%.

7. A high strength modified fiber made by the method of making a high strength modified fiber using willow bark offcut of any of claims 1 ~ 6.

Technical Field

The invention mainly relates to the technical field of waste wood leftover processing, in particular to a method for preparing high-strength modified fiber by using willow bark leftovers.

Background

In recent years, production tools, articles of daily use, artworks and the like prepared from willows are more and more popular with people due to the strong folk culture smell, and willow processed products are woven and stably deformed after being subjected to hot pressing, but no matter what processing method is adopted, the wood and willow rattan peels are required to be removed during the preparation of the products, so that the surfaces of the products are smooth, the later-stage processing is easy, and the practicability and the decoration of the willow products are improved; however, most of the remained willow bark is discarded or used as fuel, which causes great resource waste and environmental pollution.

The surface of the willow bark is of a large number of wood structures, and the willow bark contains a large number of cellulose components, but the cellulose in the willow bark is hard and brittle, poor in elasticity, low in strength and small in application range; the prior patent document CN106958159A discloses a preparation method of modified salix integra bark fibers, which is characterized in that salix integra bark is subjected to boiling, acid and alkali treatment and then is subjected to fiber beating, and the obtained fibers are soaked in a treatment solution, so that the blending property and the dyeing property of the salix integra bark fibers are improved, but the strength is still low, and only some flat commodities can be prepared after blending; the prior patent document CN107029675A discloses a method for preparing oil-absorbing fiber by using eucalyptus bark, and particularly discloses that pulp is obtained by cooking and brooming eucalyptus bark, and then the pulp is dried and modified by oleophilic and hydrophobic properties, so that the obtained fiber has strong oleophilic and hydrophobic properties, but the fiber obtained by the patent document has small length and low strength, can only be used for simple oil-absorbing treatment, and has narrow application range.

Disclosure of Invention

In order to remedy the drawbacks of the prior art, it is an object of the present invention to provide a process for preparing high strength modified fibers using willow bark leftovers.

A method for preparing high-strength modified fibers by using willow bark leftovers comprises the following steps:

(1) pulverizing, collecting willow bark leftover, pulverizing to 3 ~ 10cm, cleaning silt to protect machine, facilitating post-treatment, and improving treatment effect to obtain pulverized material;

(2) cooking, namely putting the crushed material into a container, adding water to immerse the crushed material, heating to 80 ~ 90 ℃, preserving heat for 10 ~ 15min, continuously heating to 120 ~ 130 ℃, preserving heat for 30 ~ 40min, performing high-temperature and high-pressure treatment to enable water to rapidly enter willow bark, reducing the hard brittleness and increasing the flexibility of the willow bark, taking out, draining, and obtaining a cooked material;

(3) softening, namely placing the cooked material in a fiber beating machine, beating for 25 ~ 30min, removing a wood structure on the surface layer, extracting fiber components in willow bark, placing the willow bark in a tyrosol solution, and carrying out heat preservation treatment at 50 ~ 60 ℃ for 3 ~ 4h, so that the bonding force of lignin and cellulose can be reduced, the flexibility of the fiber in the willow bark can be improved, the practicability of the willow bark fiber can be improved, and the softened material can be obtained by cleaning;

(4) brooming: brooming the softened material, brooming the softened material by using a broom fin according to a traditional method, beating the fibers to ensure that the obtained fibers are convenient to process and use, and draining to obtain the broomed material;

(5) strengthening, namely placing the brooming material in strengthening liquid, soaking for 130 ~ 160min at the temperature of 60 ~ 70 ℃ under the condition of heat preservation, adding a plurality of components into the strengthening liquid, being safe, non-toxic, green and environment-friendly, being capable of being in rapid and full contact with fibers, improving the bonding force between cellulose, enhancing the strength and corrosion resistance of the fibers, taking out, placing in modified nano titanium dioxide dispersion liquid, heating to 105 ~ 110 ℃, soaking for 30 ~ 40min under the condition of heat preservation, enabling the fibers to uniformly absorb the modified nano titanium dioxide, being capable of improving the tensile strength and ageing resistance of the willow bark fibers, increasing the processing performance and the application range of the willow bark fibers, taking out, cleaning, and drying until the water content is 8 ~ 10%, thereby obtaining the high-strength modified fibers.

And (3) adding tyrosol into the sodium bicarbonate solution while stirring, heating to 50 ~ 60 ℃ after completely adding the tyrosol, and keeping the temperature for later use.

The mass percentage concentration of the sodium bicarbonate solution is 3 ~ 4%.

The strengthening solution in the step (5) is prepared from the following raw materials, by weight, 2.4 ~ 2.6.6 parts of paraben, 1.1 ~ 1.3.3 parts of lipoic acid, 50 ~ 55 parts of ethanol, 5 ~ 7 parts of sodium tripolyphosphate and 110 ~ 120 parts of water, and is prepared by adding the paraben and the lipoic acid into the ethanol while stirring to obtain an ethanol solution, adding the sodium tripolyphosphate into the water while stirring to completely dissolve the sodium tripolyphosphate to obtain an aqueous solution, adding the ethanol solution into the aqueous solution, and fully stirring and mixing to obtain the strengthening solution.

The modified nano titanium dioxide dispersion liquid in the step (5) has the concentration of 10 ~ 15%, and the preparation method of the modified nano titanium dioxide comprises the steps of placing anatase type nano titanium dioxide in a reaction kettle, heating to 220 ~ 240 ℃ at the speed of 4 ~ 5 ℃/min, preserving heat for 20 ~ 25min, naturally cooling to 70 ~ 80 ℃, adding an acetic acid solution with the weight equal to that of the nano titanium dioxide into the reaction kettle in a stirring manner, stirring to be anhydrous, adding polyoxyethylene with the weight of 0.7 ~ 0.9.9% of that of the nano titanium dioxide, preserving heat, stirring to be uniformly mixed, and obtaining the modified nano titanium dioxide.

The volume fraction of the acetic acid solution is 2 ~ 3%.

The high-strength modified fiber is prepared by the method for preparing the high-strength modified fiber by using willow bark leftovers.

The invention has the advantages that: according to the method for preparing the high-strength modified fiber by using the willow bark leftover, the fiber prepared by recycling the waste willow bark is high in strength, softer and durable, strong acid and strong alkali are not used in the preparation process, resources can be effectively saved, and the environment is protected; firstly, the willow bark leftovers are recovered and crushed, and granular impurities are removed, so that the machine can be protected, the later-stage treatment is facilitated, and the treatment effect is improved; after being crushed, the willow bark is steamed at high temperature and high pressure, and water quickly enters the willow bark through high-temperature and high-pressure treatment, so that the hard brittleness of the willow bark can be reduced, and the flexibility is increased; placing the cooked willow bark in a fiber beating machine for beating fibers, removing a wood structure on the surface layer, extracting fiber components in the willow bark, and placing the willow bark in a tyrosol solution for softening treatment, so that the bonding force of lignin and cellulose can be reduced, the flexibility of fibers in the willow bark can be improved, and the practicability of willow bark fibers can be improved; brooming the softened fibers by using a broom fin, and pulping the fibers to make the obtained fibers convenient to process and use; the fiber is strengthened after brooming, the broomed material is placed in strengthening liquid for medium-temperature soaking, various components are added into the strengthening liquid, the brooming material is safe, non-toxic, green and environment-friendly, can be in rapid and full contact with the fiber, the binding force between cellulose is improved, the strength and the corrosion resistance of the fiber are enhanced, the brooming material is taken out and then placed in modified nano titanium dioxide dispersion liquid for high-temperature soaking, the fiber can uniformly absorb the modified nano titanium dioxide, the tensile strength and the ageing resistance of the willow bark fiber can be improved, and the processing performance and the application range of the willow bark fiber are increased.

Detailed Description

The invention is illustrated by the following specific examples.