阅读说明：本技术 一种环保型纤维增韧造纸纸浆及其制备方法 (Environment-friendly fiber toughening papermaking paper pulp and preparation method thereof ) 是由 王凯 于 2021-07-13 设计创作，主要内容包括：本发明公开了一种环保型纤维增韧造纸纸浆,它是由下述重量份的原料组成的：改性木浆100-140、4-十二烷基苯胺3-5、月桂醇硫酸钠2-4、剑麻纤维16-20、丙烯酰胺20-30、过硫酸铵1-2。本发明的造纸纸浆中加入的改性木浆,以阔叶木浆为原料,配合双醛淀粉,可以有效的提高木浆成品的粘度,同时采用硅烷偶联剂等处理,有效的改善了分散性能,本发明的造纸纸浆韧性好,不掺杂有毒有害的物质,环保无污染,通过引入剑麻纤维,可以有效的提高成品纸的韧性和抗张强度。(The invention discloses environment-friendly fiber toughening papermaking pulp which is prepared from the following raw materials in parts by weight: 100-140 parts of modified wood pulp, 3-5 parts of 4-dodecylaniline, 2-4 parts of sodium lauryl sulfate, 16-20 parts of sisal fiber, 20-30 parts of acrylamide and 1-2 parts of ammonium persulfate. The modified wood pulp added into the papermaking paper pulp takes hardwood pulp as a raw material and is matched with dialdehyde starch, so that the viscosity of a finished wood pulp product can be effectively improved, meanwhile, silane coupling agent treatment and the like are adopted, the dispersion performance is effectively improved, the papermaking paper pulp has good toughness, is not doped with toxic and harmful substances, is environment-friendly and pollution-free, and can effectively improve the toughness and tensile strength of finished paper by introducing sisal fibers.)

1. The environment-friendly fiber toughened papermaking pulp is characterized by being prepared from the following raw materials in parts by weight:

100-140 parts of modified wood pulp, 3-5 parts of 4-dodecylaniline, 2-4 parts of sodium lauryl sulfate, 16-20 parts of sisal fiber, 20-30 parts of acrylamide and 1-2 parts of ammonium persulfate.

2. The environment-friendly fiber-toughened papermaking pulp according to claim 1, characterized in that the modified wood pulp is composed of the following raw materials in parts by weight:

30-40 parts of hardwood pulp, 3-5 parts of dialdehyde starch, 1-2 parts of ethylene-based distearamide, Kh 5702-4 parts of silane coupling agent and 2-3 parts of triethylamine.

3. The environment-friendly fiber-toughened papermaking pulp according to claim 2, characterized in that the preparation method of the modified wood pulp comprises the following steps:

(1) adding a silane coupling agent Kh570 into absolute ethyl alcohol with the weight being 10-17 times that of the silane coupling agent Kh570, and uniformly stirring to obtain an alcohol dispersion liquid;

(2) adding ethylene-based distearamide into broad-leaved wood pulp, and performing ultrasonic treatment for 20-30 minutes to obtain a wood pulp solution;

(3) adding dialdehyde starch into deionized water with the weight of 20-30 times of that of the dialdehyde starch, and uniformly stirring to obtain a starch solution;

(4) mixing the alcohol dispersion liquid and the wood pulp solution, stirring uniformly, adding triethylamine, feeding into a reaction kettle, raising the temperature to 155-160 ℃, keeping the temperature and stirring for 2-3 hours, discharging, adding the starch solution, and stirring to normal temperature to obtain the starch-based resin.

4. The preparation method of the environment-friendly fiber toughened papermaking pulp as set forth in claim 1, comprising the steps of:

(1) adding ammonium persulfate into deionized water with the weight 30-40 times of that of the ammonium persulfate, and uniformly stirring to obtain an ammonium persulfate aqueous solution;

(2) adding 4-dodecylaniline into dimethylformamide with the weight 8-10 times of that of the 4-dodecylaniline, uniformly stirring, and stirring for 1-2 hours at the temperature of 50-60 ℃ to obtain an amide dispersion liquid;

(3) taking sisal fiber, grinding into fine powder, adding the fine powder into the amide dispersion liquid, and uniformly stirring to obtain a fiber dispersion liquid;

(4) mixing modified wood pulp and acrylamide, adding the mixture into deionized water which is 130 times of the weight of the mixture of 110-fold organic silicon, stirring uniformly, sending the mixture into a reaction kettle, introducing nitrogen, adjusting the temperature of the reaction kettle to be 70-80 ℃, keeping the temperature and stirring for 3-5 hours, discharging and cooling to obtain polymer dispersion liquid;

(5) and mixing the amide dispersion liquid and the fiber dispersion liquid, uniformly stirring, adding sodium lauryl sulfate, and performing ultrasonic treatment for 30-40 minutes to obtain the environment-friendly fiber toughening papermaking paper pulp.

Technical Field

The invention belongs to the field of papermaking, and particularly relates to environment-friendly fiber toughened papermaking paper pulp and a preparation method thereof.

Background

Conventional pulping refers to a process of dissociating plant fiber raw materials into natural color or bleached pulp using chemical methods, mechanical methods, or a combination thereof. The commonly adopted technical process is that the plant fiber raw material is crushed, steamed, washed, screened, bleached, purified and dried. A novel biological pulping method is developed in modern times, a lignin structure is specifically and directionally decomposed by using special strains (white rot fungi, brown rot fungi and soft rot fungi), then the rest cellulose is dissociated by a mechanical or chemical method, and then bleaching is carried out. Mechanical wood pulp, also known as groundwood pulp, is paper pulp made by mechanically defibrating fibrous materials. It plays an important role in the paper industry. Its production cost is low, production process is simple, ink absorption of finished paper is strong, opacity is high and the paper is soft and smooth. Is suitable for the printing requirement. However, the strength of the finished paper is low because of the short fibers and the high content of non-cellulose components. In addition, because most of lignin and other non-cellulose in the wood are not removed, the paper produced by the wood is easy to turn yellow and crisp, and cannot be stored for a long time.

Disclosure of Invention

The invention aims to provide environment-friendly fiber toughened papermaking pulp and a preparation method thereof aiming at the defects and the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

an environment-friendly fiber toughening papermaking pulp is composed of the following raw materials in parts by weight:

100-140 parts of modified wood pulp, 3-5 parts of 4-dodecylaniline, 2-4 parts of sodium lauryl sulfate, 16-20 parts of sisal fiber, 20-30 parts of acrylamide and 1-2 parts of ammonium persulfate.

The modified wood pulp is prepared from the following raw materials in parts by weight:

30-40 parts of hardwood pulp, 3-5 parts of dialdehyde starch, 1-2 parts of ethylene-based distearamide, Kh 5702-4 parts of silane coupling agent and 2-3 parts of triethylamine.

The preparation method of the modified wood pulp comprises the following steps:

(1) adding a silane coupling agent Kh570 into absolute ethyl alcohol with the weight being 10-17 times that of the silane coupling agent Kh570, and uniformly stirring to obtain an alcohol dispersion liquid;

(2) adding ethylene-based distearamide into broad-leaved wood pulp, and performing ultrasonic treatment for 20-30 minutes to obtain a wood pulp solution;

(3) adding dialdehyde starch into deionized water with the weight of 20-30 times of that of the dialdehyde starch, and uniformly stirring to obtain a starch solution;

(4) mixing the alcohol dispersion liquid and the wood pulp solution, stirring uniformly, adding triethylamine, feeding into a reaction kettle, raising the temperature to 155-160 ℃, keeping the temperature and stirring for 2-3 hours, discharging, adding the starch solution, and stirring to normal temperature to obtain the starch-based resin.

A preparation method of environment-friendly fiber toughening papermaking paper pulp comprises the following steps:

(1) adding ammonium persulfate into deionized water with the weight 30-40 times of that of the ammonium persulfate, and uniformly stirring to obtain an ammonium persulfate aqueous solution;

(2) adding 4-dodecylaniline into dimethylformamide with the weight 8-10 times of that of the 4-dodecylaniline, uniformly stirring, and stirring for 1-2 hours at the temperature of 50-60 ℃ to obtain an amide dispersion liquid;

(3) taking sisal fiber, grinding into fine powder, adding the fine powder into the amide dispersion liquid, and uniformly stirring to obtain a fiber dispersion liquid;

(4) mixing modified wood pulp and acrylamide, adding the mixture into deionized water which is 130 times of the weight of the mixture of 110-fold organic silicon, stirring uniformly, sending the mixture into a reaction kettle, introducing nitrogen, adjusting the temperature of the reaction kettle to be 70-80 ℃, keeping the temperature and stirring for 3-5 hours, discharging and cooling to obtain polymer dispersion liquid;

(5) and mixing the amide dispersion liquid and the fiber dispersion liquid, uniformly stirring, adding sodium lauryl sulfate, and performing ultrasonic treatment for 30-40 minutes to obtain the environment-friendly fiber toughening papermaking paper pulp.

The invention has the advantages that:

the modified wood pulp added into the papermaking paper pulp takes hardwood pulp as a raw material and is matched with dialdehyde starch, so that the viscosity of a finished wood pulp product can be effectively improved, meanwhile, silane coupling agent treatment and the like are adopted, the dispersion performance is effectively improved, the papermaking paper pulp has good toughness, is not doped with toxic and harmful substances, is environment-friendly and pollution-free, and can effectively improve the toughness and tensile strength of finished paper by introducing sisal fibers.

Detailed Description

Example 1

An environment-friendly fiber toughening papermaking pulp is composed of the following raw materials in parts by weight:

100 parts of modified wood pulp, 3 parts of 4-dodecylaniline, 2 parts of sodium lauryl sulfate, 16 parts of sisal fibers, 20 parts of acrylamide and 1 part of ammonium persulfate.

The modified wood pulp is prepared from the following raw materials in parts by weight:

broad-leaved wood pulp 30, dialdehyde starch 3, ethylene-based distearamide 1, silane coupling agent Kh 5702 and triethylamine 2.

The preparation method of the modified wood pulp comprises the following steps:

(1) adding a silane coupling agent Kh570 into absolute ethyl alcohol with the weight being 10 times of that of the silane coupling agent Kh570, and uniformly stirring to obtain an alcohol dispersion liquid;

(2) adding ethylene-based distearamide into hardwood pulp, and performing ultrasonic treatment for 20 minutes to obtain a wood pulp solution;

(3) adding dialdehyde starch into deionized water with the weight of 20 times of that of the dialdehyde starch, and uniformly stirring to obtain a starch solution;

(4) mixing the alcohol dispersion liquid and the wood pulp solution, stirring uniformly, adding triethylamine, feeding into a reaction kettle, raising the temperature to 155 ℃, keeping the temperature and stirring for 2 hours, discharging, adding the starch solution, and stirring to normal temperature to obtain the starch-based wood pulp composite material.

A preparation method of environment-friendly fiber toughening papermaking paper pulp comprises the following steps:

(1) adding ammonium persulfate into deionized water with the weight 30 times that of the ammonium persulfate, and uniformly stirring to obtain an ammonium persulfate aqueous solution;

(2) adding 4-dodecylaniline into dimethylformamide with the weight 8 times of that of the 4-dodecylaniline, uniformly stirring, and keeping the temperature and stirring at 50 ℃ for 1 hour to obtain an amide dispersion liquid;

(3) taking sisal fiber, grinding into fine powder, adding the fine powder into the amide dispersion liquid, and uniformly stirring to obtain a fiber dispersion liquid;

(4) mixing modified wood pulp and acrylamide, adding the mixture into deionized water which is 110 times of the weight of the mixture, uniformly stirring, feeding the mixture into a reaction kettle, introducing nitrogen, adjusting the temperature of the reaction kettle to 70 ℃, keeping the temperature and stirring for 3 hours, discharging and cooling to obtain a polymer dispersion liquid;

(5) and mixing the amide dispersion liquid and the fiber dispersion liquid, uniformly stirring, adding sodium lauryl sulfate, and performing ultrasonic treatment for 30 minutes to obtain the environment-friendly fiber toughening papermaking paper pulp.

Example 2

The environment-friendly fiber toughening papermaking pulp is composed of the following raw materials in parts by weight:

modified wood pulp 140, 4-dodecylaniline 5, sodium lauryl sulfate 4, sisal fiber 20, acrylamide 30 and ammonium persulfate 2.

The modified wood pulp is prepared from the following raw materials in parts by weight:

hardwood pulp 40, dialdehyde starch 5, ethylene-based distearamide 2, a silane coupling agent Kh 5704 and triethylamine 3.

The preparation method of the modified wood pulp comprises the following steps:

(1) adding a silane coupling agent Kh570 into absolute ethyl alcohol with the weight 17 times that of the silane coupling agent Kh570, and uniformly stirring to obtain an alcohol dispersion liquid;

(2) adding ethylene-based distearamide into broad-leaved wood pulp, and performing ultrasonic treatment for 30 minutes to obtain a wood pulp solution;

(3) adding dialdehyde starch into deionized water with the weight 30 times of that of the dialdehyde starch, and uniformly stirring to obtain a starch solution;

(4) mixing the alcohol dispersion liquid and the wood pulp solution, stirring uniformly, adding triethylamine, feeding into a reaction kettle, raising the temperature to 160 ℃, keeping the temperature and stirring for 3 hours, discharging, adding the starch solution, and stirring to normal temperature to obtain the starch-based wood pulp composite material.

A preparation method of environment-friendly fiber toughening papermaking paper pulp comprises the following steps:

(1) adding ammonium persulfate into deionized water with the weight 40 times that of the ammonium persulfate, and uniformly stirring to obtain an ammonium persulfate aqueous solution;

(2) adding 4-dodecylaniline into dimethylformamide with the weight 10 times of that of the 4-dodecylaniline, uniformly stirring, and keeping the temperature at 60 ℃ and stirring for 2 hours to obtain an amide dispersion liquid;

(3) taking sisal fiber, grinding into fine powder, adding the fine powder into the amide dispersion liquid, and uniformly stirring to obtain a fiber dispersion liquid;

(4) mixing modified wood pulp and acrylamide, adding the mixture into deionized water 130 times the weight of the mixture, uniformly stirring, feeding the mixture into a reaction kettle, introducing nitrogen, adjusting the temperature of the reaction kettle to 80 ℃, keeping the temperature, stirring for 5 hours, discharging and cooling to obtain a polymer dispersion liquid;

(5) and mixing the amide dispersion liquid and the fiber dispersion liquid, uniformly stirring, adding sodium lauryl sulfate, and performing ultrasonic treatment for 30 minutes to obtain the environment-friendly fiber toughening papermaking paper pulp.

Example 3

The environment-friendly fiber toughening papermaking pulp is composed of the following raw materials in parts by weight:

modified wood pulp 130, 4-dodecylaniline 4, sodium lauryl sulfate 3, sisal fiber 18, acrylamide 24 and ammonium persulfate 1.

The modified wood pulp is prepared from the following raw materials in parts by weight:

hardwood pulp 35, dialdehyde starch 4, ethylene-based distearamide 2, a silane coupling agent Kh 5703 and triethylamine 2.

The preparation method of the modified wood pulp comprises the following steps:

(1) adding a silane coupling agent Kh570 into absolute ethyl alcohol with the weight 13 times that of the silane coupling agent Kh570, and uniformly stirring to obtain an alcohol dispersion liquid;

(2) adding ethylene-based distearamide into hardwood pulp, and performing ultrasonic treatment for 25 minutes to obtain a wood pulp solution;

(3) adding dialdehyde starch into deionized water with the weight of 20-30 times of that of the dialdehyde starch, and uniformly stirring to obtain a starch solution;

(4) mixing the alcohol dispersion liquid and the wood pulp solution, stirring uniformly, adding triethylamine, feeding into a reaction kettle, raising the temperature to 155-160 ℃, keeping the temperature and stirring for 2-3 hours, discharging, adding the starch solution, and stirring to normal temperature to obtain the starch-based resin.

A preparation method of environment-friendly fiber toughening papermaking paper pulp comprises the following steps:

(1) adding ammonium persulfate into deionized water with the weight 31 times that of the ammonium persulfate, and uniformly stirring to obtain an ammonium persulfate aqueous solution;

(2) adding 4-dodecylaniline into dimethylformamide with the weight 9 times that of the 4-dodecylaniline, uniformly stirring, and keeping the temperature at 54 ℃ and stirring for 1.6 hours to obtain an amide dispersion liquid;

(3) taking sisal fiber, grinding into fine powder, adding the fine powder into the amide dispersion liquid, and uniformly stirring to obtain a fiber dispersion liquid;

(4) mixing modified wood pulp and acrylamide, adding the mixture into deionized water which is 120 times of the weight of the mixture, uniformly stirring, feeding the mixture into a reaction kettle, introducing nitrogen, adjusting the temperature of the reaction kettle to 73 ℃, keeping the temperature and stirring for 4 hours, discharging and cooling to obtain a polymer dispersion liquid;

(5) and mixing the amide dispersion liquid and the fiber dispersion liquid, uniformly stirring, adding sodium lauryl sulfate, and performing ultrasonic treatment for 38 minutes to obtain the environment-friendly fiber toughening papermaking paper pulp.

Comparative example 1

The environment-friendly fiber toughening papermaking pulp is composed of the following raw materials in parts by weight:

100 parts of wood pulp, 3 parts of 4-dodecylaniline, 2 parts of sodium lauryl sulfate, 16 parts of sisal fibers, 20 parts of acrylamide and 1 part of ammonium persulfate.

A preparation method of environment-friendly fiber toughening papermaking paper pulp comprises the following steps:

(1) adding ammonium persulfate into deionized water with the weight 30 times that of the ammonium persulfate, and uniformly stirring to obtain an ammonium persulfate aqueous solution;

(2) adding 4-dodecylaniline into dimethylformamide with the weight 8 times of that of the 4-dodecylaniline, uniformly stirring, and keeping the temperature and stirring at 50 ℃ for 1 hour to obtain an amide dispersion liquid;

(3) taking sisal fiber, grinding into fine powder, adding the fine powder into the amide dispersion liquid, and uniformly stirring to obtain a fiber dispersion liquid;

(4) mixing wood pulp and acrylamide, adding the mixture into deionized water which is 110 times of the weight of the mixture, uniformly stirring, feeding the mixture into a reaction kettle, introducing nitrogen, adjusting the temperature of the reaction kettle to 70 ℃, keeping the temperature and stirring for 3 hours, discharging and cooling to obtain a polymer dispersion liquid;

(5) and mixing the amide dispersion liquid and the fiber dispersion liquid, uniformly stirring, adding sodium lauryl sulfate, and performing ultrasonic treatment for 30 minutes to obtain the environment-friendly fiber toughening papermaking paper pulp.

Comparative example 2

The environment-friendly fiber toughening papermaking pulp is composed of the following raw materials in parts by weight:

wood pulp 140, 4-dodecylaniline 5, sodium lauryl sulfate 4, sisal fiber 20, acrylamide 30 and ammonium persulfate 2.

A preparation method of environment-friendly fiber toughening papermaking paper pulp comprises the following steps:

(1) adding ammonium persulfate into deionized water with the weight 40 times that of the ammonium persulfate, and uniformly stirring to obtain an ammonium persulfate aqueous solution;

(2) adding 4-dodecylaniline into dimethylformamide with the weight 10 times of that of the 4-dodecylaniline, uniformly stirring, and keeping the temperature at 60 ℃ and stirring for 2 hours to obtain an amide dispersion liquid;

(3) taking sisal fiber, grinding into fine powder, adding the fine powder into the amide dispersion liquid, and uniformly stirring to obtain a fiber dispersion liquid;

(4) mixing wood pulp and acrylamide, adding the mixture into deionized water 130 times the weight of the mixture, uniformly stirring, feeding the mixture into a reaction kettle, introducing nitrogen, adjusting the temperature of the reaction kettle to 80 ℃, keeping the temperature, stirring for 5 hours, discharging and cooling to obtain a polymer dispersion liquid;

(5) and mixing the amide dispersion liquid and the fiber dispersion liquid, uniformly stirring, adding sodium lauryl sulfate, and performing ultrasonic treatment for 40 minutes to obtain the environment-friendly fiber toughening papermaking paper pulp.

And (3) performance testing:

item	Gram weight	Tensile index (N m/g)
			Paper made from the paper of example 1 of the invention	95g/m2	51
Paper made of the paper of example 2 of the invention	95g/m2	50
			Paper made of the paper of example 3 of the invention	95g/m2	51
Paper made from the paper of comparative example 1	95g/m2	47
			Paper made from the paper of comparative example 2	95g/m2	45