CN113699826B - Papermaking auxiliary agent composition and preparation method thereof - Google Patents

Abstract

The invention relates to the technical field of papermaking, and provides a papermaking auxiliary composition and a preparation method thereof in order to solve the technical problem that the application strength of paper is improved by using the conventional papermaking auxiliary in papermaking, wherein the papermaking auxiliary composition comprises the following components: polyacrylamide, modified silicone oil, nonylphenol polyoxyethylene ether, a dispersing agent, modified sugarcane fibers, a filler, carbon fibers, nano silicon dioxide and a modifying agent. The defoaming agent is prepared by mixing modified silicone oil and nonylphenol polyoxyethylene ether, wherein the surface tension of the methyl silicone oil and polydimethylsiloxane is reduced after polyether modification treatment, the diffusibility and the permeability are better, and the surface balance of the defoaming agent is improved and the chemical stability is better after silicon dioxide is added.

Description

Papermaking auxiliary agent composition and preparation method thereof

Technical Field

The invention relates to the technical field of papermaking, in particular to a papermaking auxiliary agent composition and a preparation method thereof.

Background

The paper is the most common article in our daily life, is widely applied to the fields of life and study, industry, agriculture and the like, and is a powerful tool and material in the aspects of thought exchange, cultural transmission, scientific and technical development and the like.

The papermaking auxiliary agent is an auxiliary chemical added for endowing certain properties to a processing technology and a product in the pulping and papermaking process, and can be roughly divided into four types of auxiliary agents for pulping, additives for papermaking, coating processing auxiliary agents and other related auxiliary agents according to the application, and the existing papermaking auxiliary agent does not have the property of effectively improving the use strength of paper when in use.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a papermaking auxiliary agent composition and a preparation method thereof.

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

the papermaking auxiliary agent composition comprises the following components in parts by weight: 1-2 parts of polyacrylamide, 6-9 parts of modified silicone oil, 1-3 parts of nonylphenol polyoxyethylene ether, 1-2 parts of dispersant, 5-8 parts of modified sugarcane fiber, 3-6 parts of filler, 3-5 parts of carbon fiber, 0.5-1 part of nano silicon dioxide and 2-4 parts of modifier;

the modified silicone oil is obtained by modifying methyl silicone oil by polydimethylsiloxane, silicon dioxide and polyether.

The preparation method of the modified silicone oil comprises the following steps: according to the following steps of 10: (1-3): (0.5-2): (2-3) weighing methyl silicone oil, polydimethylsiloxane, silicon dioxide and polyether according to the weight ratio; stirring and mixing the silicone oil and the polydimethylsiloxane with the polyether for 1-3h in a nitrogen environment, adding silicon dioxide, and mixing at the rotating speed of 2000-3000r/min for 0.5-1h to obtain the modified silicone oil.

The filler comprises one of talcum powder, kaolin and attapulgite.

The preparation method of the modified sugarcane fiber comprises the following steps: grinding and crushing bagasse to obtain sugarcane fibers; soaking the sugarcane fibers in an acid solution for 2-4h, and then cleaning and drying; and fully mixing the acidified sugarcane fibers with the nano titanium dioxide powder and the aluminosilicate coupling agent, and filtering and drying to obtain the modified sugarcane fibers.

The weight ratio of the sugarcane fibers to the nano titanium dioxide powder to the aluminosilicate coupling agent is 20: (2-3): (4-6).

The modifier is formed by mixing a silane coupling agent, formaldehyde and persulfate, wherein the weight ratio of the silane coupling agent to the formaldehyde to the persulfate is 10: (3-7): (3-5).

The preparation method of the papermaking auxiliary agent composition comprises the following steps:

step 1: fully mixing polyacrylamide and a modifier to obtain modified polyacrylamide;

step 2: fully mixing modified silicone oil and nonylphenol polyoxyethylene ether to a defoaming auxiliary agent;

and step 3: fully mixing the modified sugarcane fibers, the filler, the carbon fibers, the nano silicon dioxide, the dispersing agent, the modified polyacrylamide and the defoaming auxiliary agent to obtain the papermaking auxiliary agent composition.

In the step 1, the polyacrylamide and the modifier are mixed at the temperature of 50-80 ℃.

The defoaming auxiliary agent is prepared by mixing modified silicone oil obtained by modifying methyl silicone oil through polydimethylsiloxane, silicon dioxide and polyether and nonylphenol polyoxyethylene ether, wherein the surface tension of the methyl silicone oil and the polydimethylsiloxane is reduced after polyether modification treatment, the diffusibility and the permeability are better, and after the silicon dioxide is added, the surface balance of the defoaming auxiliary agent is improved, the chemical stability is better, the defoaming auxiliary agent is applied to a papermaking auxiliary agent, bubbles generated in the papermaking process can be effectively eliminated, the uniform distribution of paper pulp is ensured, and the reduction of the tensile strength and the tearing resistance of paper caused by the bubbles is effectively avoided.

The modified sugarcane fibers are added into the papermaking auxiliary agent, the modified sugarcane fibers are obtained by acidifying the sugarcane fibers and then modifying the sugarcane fibers by the nano titanium dioxide and the aluminosilicate coupling agent, fiber holes in the outer wall of the acidified sugarcane fibers are denser, the nano titanium dioxide can be fully adsorbed, the contact reaction area of the acidified sugarcane fibers and the aluminosilicate coupling agent is increased, the modification effect is improved, the strength and the toughness of the obtained modified sugarcane fibers are greatly improved, and the strength and the toughness of paper can be improved when the modified sugarcane fibers are applied to the papermaking auxiliary agent.

Carbon fiber and nano silicon dioxide are also added, so that the carbon fiber and the nano silicon dioxide can be adsorbed on paper fiber in the papermaking process, and the strength of paper is improved; and a modifier formed by mixing a silane coupling agent, formaldehyde and persulfate is added to carry out pre-modification treatment on the polyacrylamide, so that the mechanical strength of the polyacrylamide and the use strength of paper are improved.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.

The paper is the most common article in daily life, is widely applied to the fields of life and study, industry, agriculture and the like, and is a powerful tool and material in the aspects of thought exchange, cultural transmission, scientific and technical development and the like. The papermaking auxiliary agent is an auxiliary chemical added for endowing certain properties to a processing technology and a product in the pulping and papermaking process, and can be roughly divided into four types of auxiliary agents for pulping, additives for papermaking, coating processing auxiliary agents and other related auxiliary agents according to the application, and the existing papermaking auxiliary agent does not have the property of effectively improving the use strength of paper when in use.

In an embodiment of the present invention, the papermaking additive composition includes the following components in parts by weight: 1-2 parts of polyacrylamide, 6-9 parts of modified silicone oil, 1-3 parts of nonylphenol polyoxyethylene ether, 1-2 parts of dispersant, 5-8 parts of modified sugarcane fiber, 3-6 parts of filler, 3-5 parts of carbon fiber, 0.5-1 part of nano silicon dioxide and 2-4 parts of modifier;

the modified silicone oil is obtained by modifying methyl silicone oil by polydimethylsiloxane, silicon dioxide and polyether.

According to the defoaming auxiliary agent, modified silicone oil obtained by modifying methyl silicone oil through polydimethylsiloxane, silicon dioxide and polyether is mixed with nonylphenol polyoxyethylene ether to obtain the defoaming auxiliary agent, wherein the surface tension of the methyl silicone oil and the polydimethylsiloxane is reduced after polyether modification treatment, the diffusibility and the permeability are better, and after the silicon dioxide is added, the surface balance of the defoaming auxiliary agent is improved, the chemical stability is better, and when the defoaming auxiliary agent is applied to a papermaking auxiliary agent, bubbles generated in a papermaking process can be effectively eliminated, the uniform distribution of paper pulp is ensured, and the reduction of the tensile strength and the tearing resistance of paper caused by the bubbles is effectively avoided.

According to the invention, the modified sugarcane fibers are added into the papermaking auxiliary agent, and are obtained by acidizing the sugarcane fibers and then modifying the sugarcane fibers by using the nano titanium dioxide and the aluminosilicate coupling agent, the fiber holes in the outer wall of the acidized sugarcane fibers are denser, the nano titanium dioxide can be fully adsorbed, the contact reaction area with the aluminosilicate coupling agent is increased, the modification effect is improved, the strength and the toughness of the obtained modified sugarcane fibers are greatly improved, and the modified sugarcane fibers are applied to the papermaking auxiliary agent and can improve the strength and the toughness of paper.

In the invention, carbon fiber and nano silicon dioxide are also added and can be adsorbed on paper fiber in the papermaking process, thereby improving the strength of paper; and a modifier formed by mixing a silane coupling agent, formaldehyde and persulfate is added to carry out pre-modification treatment on the polyacrylamide, so that the mechanical strength of the polyacrylamide and the use strength of paper are improved.

The technical effects of a papermaking auxiliary composition and a preparation method thereof according to the present invention will be further described with reference to the following specific examples, but the specific implementation methods mentioned in these examples are only illustrative and explanatory of the technical solution of the present invention, and do not limit the implementation scope of the present invention, and all modifications and substitutions based on the above principles should be within the protection scope of the present invention.

Example 1

Weighing 10 g of methyl silicone oil, 1 g of polydimethylsiloxane, 0.5 g of silicon dioxide and 2 g of polyether; stirring and mixing silicone oil and polydimethylsiloxane with polyether for 1h in a nitrogen environment, adding silicon dioxide, and mixing at a rotating speed of 2000r/min for 0.5h to obtain modified silicone oil;

weighing 20 g of sugarcane fibers, 2 g of nano titanium dioxide powder and 4 g of aluminosilicate coupling agent, and grinding the sugarcane bagasse to obtain the sugarcane fibers; soaking the sugarcane fibers in an acid solution for 2 hours, and then cleaning and drying the sugarcane fibers; fully mixing the acidified sugarcane fibers with nano titanium dioxide powder and an aluminosilicate coupling agent, and filtering and drying to obtain modified sugarcane fibers;

weighing 10 g of silane coupling agent, 3 g of formaldehyde and 3 g of persulfate, and mixing to obtain a modifier;

weighing 1 g of polyacrylamide, 6 g of modified silicone oil, 1 g of nonylphenol polyoxyethylene ether, 1 g of dispersant, 5 g of modified sugarcane fiber, 3 g of kaolin, 3 g of carbon fiber, 0.5 g of nano silicon dioxide and 2 g of modifier; fully mixing polyacrylamide and a modifier at 50 ℃ to obtain modified polyacrylamide; fully mixing modified silicone oil and nonylphenol polyoxyethylene ether to a defoaming auxiliary agent; fully mixing the modified sugarcane fibers, kaolin, carbon fibers, nano silicon dioxide, a dispersing agent, modified polyacrylamide and a defoaming auxiliary agent to obtain the papermaking auxiliary agent composition.

Example 2

Weighing 10 g of methyl silicone oil, 3 g of polydimethylsiloxane, 2 g of silicon dioxide and 3 g of polyether; stirring and mixing silicone oil and polydimethylsiloxane with polyether for 3h in a nitrogen environment, adding silicon dioxide, and mixing at a rotating speed of 3000r/min for 1h to obtain modified silicone oil;

weighing 20 g of sugarcane fibers, 3 g of nano titanium dioxide powder and 6 g of aluminosilicate coupling agent, and grinding the sugarcane bagasse to obtain the sugarcane fibers; soaking the sugarcane fibers in an acid solution for 4 hours, and then cleaning and drying the sugarcane fibers; fully mixing the acidified sugarcane fibers with nano titanium dioxide powder and an aluminosilicate coupling agent, and filtering and drying to obtain modified sugarcane fibers;

weighing 10 g of silane coupling agent, 7 g of formaldehyde and 5 g of persulfate, and mixing to obtain a modifier;

weighing 2 g of polyacrylamide, 9 g of modified silicone oil, 3 g of nonylphenol polyoxyethylene ether, 2 g of dispersant, 8 g of modified sugarcane fiber, 6 g of kaolin, 5 g of carbon fiber, 1 g of nano silicon dioxide and 4 g of modifier; fully mixing polyacrylamide and a modifier at the temperature of 80 ℃ to obtain modified polyacrylamide; fully mixing modified silicone oil and nonylphenol polyoxyethylene ether to a defoaming auxiliary agent; fully mixing the modified sugarcane fibers, kaolin, carbon fibers, nano silicon dioxide, a dispersing agent, modified polyacrylamide and a defoaming auxiliary agent to obtain the papermaking auxiliary agent composition.

Example 3

Weighing 10 g of methyl silicone oil, 2 g of polydimethylsiloxane, 1.2 g of silicon dioxide and 2.5 g of polyether; stirring and mixing silicone oil and polydimethylsiloxane with polyether for 2 hours in a nitrogen environment, adding silicon dioxide, and mixing for 0.75 hour at the rotating speed of 2500r/min to obtain modified silicone oil;

weighing 20 g of sugarcane fibers, 2.5 g of nano titanium dioxide powder and 5 g of aluminosilicate coupling agent, and grinding the sugarcane bagasse to obtain the sugarcane fibers; soaking the sugarcane fibers in an acid solution for 3 hours, and then cleaning and drying the sugarcane fibers; fully mixing the acidified sugarcane fibers with nano titanium dioxide powder and an aluminosilicate coupling agent, and filtering and drying to obtain modified sugarcane fibers;

weighing 10 g of silane coupling agent, 5 g of formaldehyde and 4 g of persulfate, and mixing to obtain a modifier;

weighing 1.5 g of polyacrylamide, 7.5 g of modified silicone oil, 2 g of nonylphenol polyoxyethylene ether, 1.5 g of dispersant, 6.5 g of modified sugarcane fiber, 4.5 g of kaolin, 4 g of carbon fiber, 0.75 g of nano silicon dioxide and 3 g of modifier; fully mixing polyacrylamide and a modifier at 65 ℃ to obtain modified polyacrylamide; fully mixing modified silicone oil and nonylphenol polyoxyethylene ether to a defoaming auxiliary agent; fully mixing the modified sugarcane fibers, kaolin, carbon fibers, nano silicon dioxide, a dispersing agent, modified polyacrylamide and a defoaming auxiliary agent to obtain the papermaking auxiliary agent composition.

Example 4

Modified silicone oil was obtained in the same manner as in example 2;

modified sugarcane fibers are obtained by the same preparation method as the example 2;

the modifier is obtained by the same preparation method as the example 2;

weighing 1.8 g of polyacrylamide, 8.5 g of modified silicone oil, 2.8 g of nonylphenol polyoxyethylene ether, 1.8 g of dispersant, 7 g of modified sugarcane fiber, 5 g of kaolin, 4.5 g of carbon fiber, 0.8 g of nano silicon dioxide and 3.5 g of modifier; fully mixing polyacrylamide and a modifier at the temperature of 80 ℃ to obtain modified polyacrylamide; fully mixing modified silicone oil and nonylphenol polyoxyethylene ether to a defoaming auxiliary agent; fully mixing the modified sugarcane fibers, kaolin, carbon fibers, nano silicon dioxide, a dispersing agent, modified polyacrylamide and a defoaming auxiliary agent to obtain the papermaking auxiliary agent composition.

Example 5

Modified silicone oil was obtained by the same preparation method as in example 1;

modified sugarcane fibers are obtained by the same preparation method as the example 1;

the modifier is obtained by the same preparation method as the example 1;

weighing 1.2 g of polyacrylamide, 6.5 g of modified silicone oil, 1.2 g of nonylphenol polyoxyethylene ether, 1.2 g of dispersant, 6 g of modified sugarcane fiber, 4 g of kaolin, 3.5 g of carbon fiber, 0.6 g of nano silicon dioxide and 2.5 g of modifier; fully mixing polyacrylamide and a modifier at 50 ℃ to obtain modified polyacrylamide; fully mixing modified silicone oil and nonylphenol polyoxyethylene ether to a defoaming auxiliary agent; fully mixing the modified sugarcane fibers, kaolin, carbon fibers, nano silicon dioxide, a dispersing agent, modified polyacrylamide and a defoaming auxiliary agent to obtain the papermaking auxiliary agent composition.

Example 6

Modified silicone oil was obtained by the same preparation method as in example 1;

modified sugarcane fibers are obtained by the same preparation method as the example 1;

the modifier is obtained by the same preparation method as the example 1;

weighing 2 g of polyacrylamide, 9 g of modified silicone oil, 3 g of nonylphenol polyoxyethylene ether, 2 g of dispersant, 8 g of modified sugarcane fiber, 6 g of kaolin, 5 g of carbon fiber, 1 g of nano silicon dioxide and 4 g of modifier; fully mixing polyacrylamide and a modifier at the temperature of 80 ℃ to obtain modified polyacrylamide; fully mixing modified silicone oil and nonylphenol polyoxyethylene ether to a defoaming auxiliary agent; fully mixing the modified sugarcane fibers, kaolin, carbon fibers, nano silicon dioxide, a dispersing agent, modified polyacrylamide and a defoaming auxiliary agent to obtain the papermaking auxiliary agent composition.

Example 7

Modified silicone oil is obtained by the same preparation method as the example 2;

modified sugarcane fibers are obtained by the same preparation method as the example 2;

the modifier is obtained by the same preparation method as the example 2;

weighing 1 g of polyacrylamide, 6 g of modified silicone oil, 1 g of nonylphenol polyoxyethylene ether, 1 g of dispersant, 5 g of modified sugarcane fiber, 3 g of kaolin, 3 g of carbon fiber, 0.5 g of nano silicon dioxide and 2 g of modifier; fully mixing polyacrylamide and a modifier at 50 ℃ to obtain modified polyacrylamide; fully mixing modified silicone oil and nonylphenol polyoxyethylene ether to a defoaming auxiliary agent; fully mixing the modified sugarcane fibers, kaolin, carbon fibers, nano silicon dioxide, a dispersing agent, modified polyacrylamide and a defoaming auxiliary agent to obtain the papermaking auxiliary agent composition.

The papermaking auxiliary agent compositions prepared in the examples 1 to 7 are applied to papermaking, the same conditions in the papermaking process are ensured, after the papermaking is finished, the tensile strength, the ring crush strength, the folding strength and the tearing strength of the paper prepared by using the papermaking auxiliary agent compositions prepared in the examples 1 to 7 are tested, and the papermaking auxiliary agent of Henan Eulan environmental protection science and technology Limited company is selected as a control group and applied to the papermaking. Cutting the paper obtained by making paper in the embodiments 1-7 and the comparison group into 10cm × 10cm paper sheets, pulling the two sides of the paper sheet until the paper sheet is broken, and dividing the tensile value when the paper sheet is broken by the area of the paper sheet to obtain the tensile strength value; cutting the paper obtained by making paper in the embodiments 1-7 and the comparison group into paper sheets with the diameter of 10cm, inserting the paper sheets into a sample seat to form a circular ring shape, applying pressure between an upper pressing plate and a lower pressing plate, wherein the maximum force borne by the paper sheets before being crushed is the ring pressure strength; the paper made in the examples 1-7 and the control group is folded in a reciprocating way until the paper is broken and broken, and the maximum folding times are the folding endurance; the paper obtained by tearing the paper made in examples 1-7 and the control group has the tearing resistance as the tensile force when the paper is torn, and the test results are shown in table 1:

table 1

In summary, it can be seen from table 1 that the paper sheets obtained by applying the paper making aid compositions prepared in examples 1 to 7 to paper making all have better tensile strength, ring crush strength, folding strength and tearing strength than the control group, and the paper making aid of examples 2 and 4 has the best effect.

Further, the invention also makes systematic research on the process conditions in the preparation method of the papermaking additive composition, and the following test schemes are only explained for the significant effect of the process condition change on the papermaking additive composition, and all use the process conditions of the embodiment 2 as the basis, specifically see the comparative examples 1-5:

comparative example 1

Weighing 20 g of sugarcane fibers, 3 g of nano titanium dioxide powder and 6 g of aluminosilicate coupling agent, and grinding the sugarcane bagasse to obtain sugarcane fibers; soaking the sugarcane fibers in an acid solution for 4 hours, and then cleaning and drying the sugarcane fibers; fully mixing the acidified sugarcane fibers with nano titanium dioxide powder and an aluminosilicate coupling agent, and filtering and drying to obtain modified sugarcane fibers;

weighing 10 g of silane coupling agent, 7 g of formaldehyde and 5 g of persulfate, and mixing to obtain a modifier;

weighing 2 g of polyacrylamide, 9 g of methyl silicone oil, 3 g of nonylphenol polyoxyethylene ether, 2 g of dispersant, 8 g of modified sugarcane fiber, 6 g of kaolin, 5 g of carbon fiber, 1 g of nano silicon dioxide and 4 g of modifier; fully mixing polyacrylamide and a modifier at the temperature of 80 ℃ to obtain modified polyacrylamide; fully mixing methyl silicone oil and nonylphenol polyoxyethylene ether to a defoaming auxiliary agent; fully mixing the modified sugarcane fibers, kaolin, carbon fibers, nano silicon dioxide, a dispersing agent, modified polyacrylamide and a defoaming auxiliary agent to obtain the papermaking auxiliary agent composition.

Comparative example 2

Weighing 10 g of methyl silicone oil, 3 g of polydimethylsiloxane and 3 g of polyether; stirring and mixing the silicone oil and the polydimethylsiloxane with the polyether for 3 hours under a nitrogen environment to obtain modified silicone oil;

modified sugarcane fibers are prepared by the same preparation method as the example 2;

the modifier is prepared by the same preparation method as the example 2;

the papermaking aid composition was prepared in the same manner as in example 2.

Comparative example 3

Weighing 10 g of methyl silicone oil, 2 g of silicon dioxide and 3 g of polyether; stirring and mixing the silicone oil and polyether for 3 hours in a nitrogen environment, adding silicon dioxide, and mixing at a rotating speed of 3000r/min for 1 hour to obtain modified silicone oil;

modified sugarcane fibers are prepared by the same preparation method as the example 2;

the modifier is prepared by the same preparation method as the example 2;

the papermaking additive composition was prepared in the same manner as in example 2.

Comparative example 4

Modified silicone oil was prepared in the same manner as in example 2;

modified sugarcane fibers are prepared by the same preparation method as the example 2;

the modifier is prepared by the same preparation method as the example 2;

weighing 2 g of polyacrylamide, 9 g of modified silicone oil, 2 g of dispersant, 8 g of modified sugarcane fiber, 6 g of kaolin, 5 g of carbon fiber, 1 g of nano silicon dioxide and 4 g of modifier; fully mixing polyacrylamide and a modifier at the temperature of 80 ℃ to obtain modified polyacrylamide; fully mixing the modified sugarcane fibers, kaolin, carbon fibers, nano silicon dioxide, a dispersing agent, modified polyacrylamide and modified silicone oil to obtain the papermaking auxiliary agent composition.

Comparative example 5

Modified silicone oil was prepared in the same manner as in example 2;

the modifier is prepared by the same preparation method as the example 2;

weighing 2 g of polyacrylamide, 9 g of modified silicone oil, 3 g of nonylphenol polyoxyethylene ether, 2 g of dispersant, 6 g of kaolin, 5 g of carbon fiber, 1 g of nano silicon dioxide and 4 g of modifier; fully mixing polyacrylamide and a modifier at the temperature of 80 ℃ to obtain modified polyacrylamide; fully mixing modified silicone oil and nonylphenol polyoxyethylene ether to a defoaming auxiliary agent; fully mixing kaolin, carbon fibers, nano silicon dioxide, a dispersing agent, modified polyacrylamide and a defoaming auxiliary agent to obtain the papermaking auxiliary agent composition.

Comparative example 6

Modified silicone oil was prepared in the same manner as in example 2;

weighing 20 g of sugarcane fibers, 3 g of nano titanium dioxide powder and 6 g of aluminosilicate coupling agent, and grinding the sugarcane bagasse to obtain the sugarcane fibers; fully mixing the sugarcane fibers with nano titanium dioxide powder and an aluminosilicate coupling agent, and filtering and drying to obtain modified sugarcane fibers;

the modifier is prepared by the same preparation method as the example 2;

the papermaking additive composition was prepared in the same manner as in example 2.

Comparative example 7

Modified silicone oil was prepared in the same manner as in example 2;

weighing 20 g of sugarcane fibers and 6 g of aluminosilicate coupling agent, and grinding the sugarcane bagasse to obtain the sugarcane fibers; soaking the sugarcane fibers in an acid solution for 4 hours, and then cleaning and drying the sugarcane fibers; fully mixing the acidified sugarcane fibers with an aluminosilicate coupling agent, and filtering and drying to obtain modified sugarcane fibers;

the modifier is prepared by the same preparation method as the example 2;

the papermaking additive composition was prepared in the same manner as in example 2.

Comparative example 8

Modified silicone oil was prepared in the same manner as in example 2;

modified sugarcane fibers are prepared by the same preparation method as the example 2;

weighing 2 g of polyacrylamide, 9 g of modified silicone oil, 3 g of nonylphenol polyoxyethylene ether, 2 g of dispersing agent, 8 g of modified sugarcane fiber, 6 g of kaolin, 5 g of carbon fiber and 1 g of nano silicon dioxide; fully mixing modified silicone oil and nonylphenol polyoxyethylene ether to a defoaming auxiliary agent; fully mixing the modified sugarcane fibers, kaolin, carbon fibers, nano silicon dioxide, a dispersing agent, polyacrylamide and a defoaming auxiliary agent to obtain the papermaking auxiliary agent composition.

The papermaking auxiliary compositions prepared in comparative examples 1 to 8 were applied to papermaking to ensure the same conditions in the papermaking process, and after completion of papermaking, the tensile strength, ring crush strength, folding resistance and tear resistance of the papers prepared using the papermaking auxiliary compositions prepared in comparative examples 1 to 8 were tested. Cutting the paper obtained by making paper according to the comparative examples 1-8 into paper sheets of 10cm multiplied by 10cm, pulling two sides of the paper sheets until the paper sheets break, and dividing the tensile value when the paper sheets break by the area of the paper sheets to obtain the tensile strength value; cutting the paper obtained by making paper according to the comparative examples 1-8 into paper sheets with the diameter of 10cm, inserting the paper sheets into a sample seat to form a circular ring shape, and applying pressure between an upper pressing plate and a lower pressing plate, wherein the maximum force borne by the paper sheets before being crushed is the ring crush strength; the paper made according to the comparative examples 1 to 8 is folded in a reciprocating way until the paper is broken, and the maximum folding times are the folding endurance; the paper obtained by papermaking in comparative examples 1-8 is torn, the tensile force when the paper is torn is the tearing resistance, and the test result is shown in the following table 2:

TABLE 2

In summary, as can be seen from table 2, the paper making aid compositions prepared in comparative examples 1 to 8 were applied to paper making, and the resulting paper sheets were inferior in tensile strength, ring crush strength, folding strength and tear strength to those of the paper making aid compositions prepared in example 2. Wherein, the methyl silicone oil which is not modified is added in the preparation process of the comparative example 1, the defoaming performance is reduced; in comparative example 2, no silica was added when the methyl silicone oil was modified; comparative example 3 polydimethylsiloxane was not added when the methyl silicone oil was modified; comparative example 4 no nonylphenol polyoxyethylene ether was added during the preparation; comparative example 5 unmodified sugar cane fibre was added; comparative example 6 sugar cane fibers were not pre-acidified when they were modified; comparative example 7 when the sugarcane fibers are modified, nano titanium dioxide powder is not added, so that the sugarcane fibers obtained by modification have lower strength; comparative example 8 is the addition of a modifier made by mixing a silane coupling agent, formaldehyde and persulfate.

In summary, in the papermaking auxiliary composition and the preparation method thereof provided in this embodiment, modified silicone oil obtained by modifying methyl silicone oil with polydimethylsiloxane, silicon dioxide and polyether is mixed with nonylphenol polyoxyethylene ether to obtain the defoaming auxiliary, wherein the surface tension of the methyl silicone oil and the polydimethylsiloxane is reduced after the polyether modification treatment, and the diffusibility and the permeability are better, and after the silicon dioxide is added, the surface balance of the defoaming auxiliary is improved, and the chemical stability is better.

The modified sugarcane fibers are added into the papermaking auxiliary agent, the modified sugarcane fibers are obtained by acidifying the sugarcane fibers and then modifying the sugarcane fibers by the nano titanium dioxide and the aluminosilicate coupling agent, fiber holes in the outer wall of the acidified sugarcane fibers are denser, the nano titanium dioxide can be fully adsorbed, the contact reaction area of the acidified sugarcane fibers and the aluminosilicate coupling agent is increased, the modification effect is improved, the strength and the toughness of the obtained modified sugarcane fibers are greatly improved, and the strength and the toughness of paper can be improved when the modified sugarcane fibers are applied to the papermaking auxiliary agent.

Carbon fiber and nano silicon dioxide are also added, so that the carbon fiber and the nano silicon dioxide can be adsorbed on paper fiber in the papermaking process, and the strength of paper is improved; and a modifier formed by mixing a silane coupling agent, formaldehyde and persulfate is added to carry out pre-modification treatment on polyacrylamide, so that the mechanical strength of the polyacrylamide and the use strength of paper are improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (7)

1. The papermaking auxiliary agent composition is characterized by comprising the following components in parts by weight: 1-2 parts of polyacrylamide, 6-9 parts of modified silicone oil, 1-3 parts of nonylphenol polyoxyethylene ether, 1-2 parts of dispersant, 5-8 parts of modified sugarcane fiber, 3-6 parts of filler, 3-5 parts of carbon fiber, 0.5-1 part of nano silicon dioxide and 2-4 parts of modifier;

the modified silicone oil is obtained by modifying methyl silicone oil by polydimethylsiloxane, silicon dioxide and polyether;

the preparation method of the modified silicone oil comprises the following steps: according to the following steps: (1-3): (0.5-2): weighing methyl silicone oil, polydimethylsiloxane, silicon dioxide and polyether according to the weight ratio of (2-3); stirring and mixing the silicone oil and the polydimethylsiloxane with the polyether for 1-3h in a nitrogen environment, adding silicon dioxide, and mixing at the rotating speed of 2000-3000r/min for 0.5-1h to obtain modified silicone oil;

the preparation method of the modified sugarcane fiber comprises the following steps: grinding and crushing bagasse to obtain sugarcane fibers; soaking the sugarcane fibers in an acid solution for 2-4h, cleaning and drying; fully mixing the acidified sugarcane fibers with nano titanium dioxide powder and an aluminosilicate coupling agent, and filtering and drying to obtain modified sugarcane fibers;

the modifier is formed by mixing a silane coupling agent, formaldehyde and persulfate, wherein the weight ratio of the silane coupling agent to the formaldehyde to the persulfate is 10: (3-7): (3-5).

2. The papermaking additive composition according to claim 1, comprising the following components in parts by weight: 1.2-1.8 parts of polyacrylamide, 6.5-8.5 parts of modified silicone oil, 1.2-2.8 parts of nonylphenol polyoxyethylene ether, 1.2-1.8 parts of dispersant, 6-7 parts of modified sugarcane fiber, 4-5 parts of filler, 3.5-4.5 parts of carbon fiber, 0.6-0.8 part of nano silicon dioxide and 2.5-3.5 parts of modifier.

3. The papermaking additive composition according to claim 1, comprising the following components in parts by weight: 1.5 parts of polyacrylamide, 7.5 parts of modified silicone oil, 2 parts of nonylphenol polyoxyethylene ether, 1.5 parts of dispersing agent, 6.5 parts of modified sugarcane fiber, 4.5 parts of filler, 4 parts of carbon fiber, 0.75 part of nano silicon dioxide and 3 parts of modifying agent.

4. The papermaking additive composition of claim 1, wherein the filler comprises one of talc, kaolin, and attapulgite.

5. The papermaking additive composition according to claim 1, wherein the weight ratio of the sugar cane fibers to the nano titanium dioxide powder and the aluminosilicate coupling agent is 20: (2-3): (4-6).

6. A process for the preparation of a paper making aid composition as claimed in any one of claims 1 to 5, comprising the steps of:

step 1: fully mixing polyacrylamide and a modifier to obtain modified polyacrylamide;

step 2: fully mixing modified silicone oil and nonylphenol polyoxyethylene ether to a defoaming auxiliary agent;

and step 3: fully mixing the modified sugarcane fibers, the filler, the carbon fibers, the nano silicon dioxide, the dispersing agent, the modified polyacrylamide and the defoaming auxiliary agent to obtain the papermaking auxiliary agent composition.

7. The method of claim 6, wherein the polyacrylamide and the modifier are mixed at 50-80 ℃ in step 1.