Starch / glycerol / ionic liquid composite slurry as well as preparation method and application thereof

Abstract

The invention discloses starch / glycerol / ionic liquid composite slurry as well as a preparation method and application thereof, and relates to the technical field of textile slurry. The starch / glycerol / ionic liquid composite slurry is obtained by polymerizing starch, glycerol and ionic liquid by adopting a one-step solution method, and has good adhesion to polyester cotton warp yarns. The composite slurry is low in viscosity, easy to permeate and high in stability; the mechanical property of the polyester cotton warp yarn is obviously influenced, the breaking strength is gradually increased, and the elongation at break is firstly increased and then reduced; meanwhile, synthesis conditions are mild, the method is simple, raw material cost is low, and industrialization is easy to achieve.

Description

Technical Field

[0001] The invention belongs to the technical field of textile slurries, and in particular relates to a starch / glycerol / ionic liquid composite slurry and a preparation method and application thereof. Background Art

[0002] In the production process of textile mills, in order to improve the weavability of warp yarns, most warp yarns must be sized before weaving. This pre-weaving preparation process is called warp yarn sizing. Unsized warp yarns will become fuzzy after intense friction, forming fabric defects. The material used for warp yarn sizing is referred to as sizing. Sizing can improve the abrasion resistance of warp yarns, yarn breaking strength, fiber bundling and weavability of warp yarns, and ensure the smooth weaving process.

[0003] The textile slurries currently used are mainly divided into modified starch, polyacrylic acid, polyvinyl alcohol (PVA), and water-based polyester. Modified starch slurries have certain strength and are biodegradable, but the adhesion of modified starch to synthetic fibers is poor, and starch materials are prone to aging. Polyacrylic acid and water-based polyesters have better adhesion to synthetic fibers and are relatively easy to degrade, but the strength of polyacrylic acid and water-based polyester slurries is low. PVA slurry has good adhesion to synthetic fibers, but PVA is difficult to biodegrade, which has a certain impact on the environment.

[0004] In recent years, ionic liquids have become a hot topic of research as polymer plasticizers and composite material compatibilizers. The existing public patent (Announcement No. CN105001345A) discloses an ionic liquid solution of palmitate modified starch slurry and its application. In the above method, ionic liquid is used as starch solvent, which is complex and energy-intensive.

[0005] To this end, we provide a starch / glycerol / ionic liquid composite slurry and a preparation method and application thereof to solve the above-mentioned problems. Summary of the invention

[0006] In order to solve the above problems, the present invention aims to provide a starch / glycerol / ionic liquid composite slurry, which has low viscosity, easy penetration, high stability and good adhesion to polyester-cotton warp yarn. The present invention also provides a preparation method and use, which has simple steps, low raw material cost and is easy to industrialize.

[0007] The present invention is a starch / glycerol / ionic liquid composite slurry, which is composed of the following raw materials in terms of mass fraction:

[0008] 100 parts of starch;

[0009] Glycerin 17.5-10 parts;

[0010] 2.5-10 parts of ionic liquid.

[0011] The present invention is further configured such that the starch is one of oxidized starch, acidic starch or esterified starch.

[0012] The present invention is further configured such that the ionic liquid is one of 1-butyl-3-methylimidazolium tetrafluoroborate or 1-butyl-3-methylimidazolium bromide.

[0013] A method for preparing a starch / glycerol / ionic liquid composite slurry comprises the following steps:

[0014] (1) adding 100 parts of starch, 17.5-10 parts of glycerol, and 2.5-10 parts of ionic liquid into a mixer and mixing them uniformly to obtain a mixed component;

[0015] (2) 4-6 parts of the mixed components and 94-96 parts of deionized water were added to a three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, and heated to 95° C. in a water bath and kept warm for 60 minutes to obtain a starch / glycerol / ionic liquid composite slurry.

[0016] The composite sizing material is used in sizing polyester-cotton warp yarns.

[0017] The present invention has the following beneficial effects:

[0018] (1) The composite slurry proposed in the present invention has low viscosity, is easy to penetrate and is stable; (2) The composite slurry proposed in the present invention has excellent adhesion to polyester-cotton warp yarn; (3) The composite slurry proposed in the present invention can be repeatedly recycled after desizing, and is a kind of economical material, which can reduce waste pollution and bring higher economic benefits; (4) The preparation method of the composite slurry proposed in the present invention is simple, the raw material cost is low and it is easy to realize industrialization.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 The effect of ionic liquid addition amount on the adhesion of polyester-cotton warp yarn. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The present invention is a starch / glycerol / ionic liquid composite slurry, which is composed of the following raw materials in terms of mass fraction:

[0024] 100 parts of starch;

[0025] Glycerin 17.5-10 parts;

[0026] 2.5-10 parts of ionic liquid;

[0027] The starch is one of oxidized starch, acidic starch or esterified starch, and the ionic liquid is one of 1-butyl-3-methylimidazolium tetrafluoroborate or 1-butyl-3-methylimidazolium bromide.

[0028] A method for preparing a starch / glycerol / ionic liquid composite slurry comprises the following steps:

[0029] (1) adding 100 parts of starch, 17.5-10 parts of glycerol, and 2.5-10 parts of ionic liquid into a mixer and mixing them uniformly to obtain a mixed component;

[0030] (2) 4-6 parts of the mixed components and 94-96 parts of deionized water were added to a three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, and heated to 95° C. in a water bath and kept warm for 60 minutes to obtain a starch / glycerol / ionic liquid composite slurry.

[0031] The composite sizing material is used in sizing polyester-cotton warp yarns.

[0032] In order to further test and analyze the influence of the raw material composition by mass fraction on the performance of the composite slurry, the following tests were performed:

[0033] Example 1

[0034] 6 g of oxidized starch, 1.05 g of glycerol, 0.15 g of 1-butyl-3-methylimidazolium tetrafluoroborate and 92.8 g of deionized water were added to a three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, heated to 95° C. in a water bath, and kept warm for 60 min to obtain a starch / glycerol / ionic liquid paste;

[0035] The starch / glycerol / ionic liquid paste was poured into a glass plate, dried in a vacuum oven at 50° C., demolded and placed in an environment with a relative humidity of 68% for 3 days, and the film properties were tested (the results are shown in Table 1).

[0036] Example 2

[0037] 6 g of oxidized starch, 0.9 g of glycerol, 0.3 g of 1-butyl-3-methylimidazolium tetrafluoroborate and 92.8 g of deionized water were added to a three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, heated to 95° C. in a water bath, and kept warm for 60 min to obtain a starch / glycerol / ionic liquid paste;

[0038] The starch / glycerol / ionic liquid paste was poured into a glass plate, dried in a vacuum oven at 50° C., demolded and placed in an environment with a relative humidity of 68% for 3 days, and the film properties were tested (the results are shown in Table 1).

[0039] Example 3

[0040] 6 g of oxidized starch, 0.75 g of glycerol, 0.45 g of 1-butyl-3-methylimidazolium tetrafluoroborate and 92.8 g of deionized water were added to a three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, heated to 95° C. in a water bath, and kept warm for 60 min to obtain a starch / glycerol / ionic liquid paste;

[0041] The starch / glycerol / ionic liquid paste was poured into a glass plate, dried in a vacuum oven at 50° C., demolded and placed in an environment with a relative humidity of 68% for 3 days, and the film properties were tested (the results are shown in Table 1).

[0042] Example 4

[0043] 6 g of oxidized starch, 0.6 g of glycerol, 0.6 g of 1-butyl-3-methylimidazolium tetrafluoroborate and 92.8 g of deionized water were added to a three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, heated to 95° C. in a water bath, and kept warm for 60 min to obtain a starch / glycerol / ionic liquid paste;

[0044] The starch / glycerol / ionic liquid paste was poured into a glass plate, dried in a vacuum oven at 50° C., demolded and placed in an environment with a relative humidity of 68% for 3 days, and the film properties were tested (the results are shown in Table 1).

[0045] Example 5

[0046] 20 g of oxidized starch, 3.5 g of glycerol, 0.5 g of 1-butyl-3-methylimidazolium tetrafluoroborate and 476 g of deionized water were added to a three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, heated to 95° C. in a water bath, and kept warm for 60 min to obtain a starch / glycerol / ionic liquid paste;

[0047] 100g of paste was taken to test the viscosity and viscosity stability of the slurry. The remaining paste was poured into a 500mL beaker, and polyester-cotton yarn (T / C80 / 20) was placed in the beaker, kept at 95°C for 5 minutes, and the yarn was taken out to dry naturally, placed in an environment with a relative humidity of 68% for 3 days, and the sizing performance was tested (the results are shown in Table 2).

[0048] Example 6

[0049] 20 g of oxidized starch, 3 g of glycerol, 1 g of 1-butyl-3-methylimidazolium tetrafluoroborate and 476 g of deionized water were added to a three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, heated to 95° C. in a water bath, and kept warm for 60 min to obtain a starch / glycerol / ionic liquid paste;

[0050] 100g of paste was taken to test the viscosity and viscosity stability of the slurry. The remaining paste was poured into a 500mL beaker, and polyester-cotton yarn (T / C80 / 20) was placed in the beaker, kept at 95°C for 5 minutes, and the yarn was taken out to dry naturally, placed in an environment with a relative humidity of 68% for 3 days, and the sizing performance was tested (the results are shown in Table 2).

[0051] Example 7

[0052] 20 g of oxidized starch, 2.5 g of glycerol, 1.5 g of 1-butyl-3-methylimidazolium tetrafluoroborate and 476 g of deionized water were added to a three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, heated to 95° C. in a water bath, and kept warm for 60 min to obtain a starch / glycerol / ionic liquid paste; 100 g of the paste was taken to test the slurry viscosity and viscosity stability;

[0053] The remaining paste was poured into a 500 mL beaker, and polyester-cotton yarn (T / C80 / 20) was placed in the beaker and kept at 95°C for 5 min. The yarn was taken out and dried naturally, and placed in an environment with a relative humidity of 68% for 3 days to test the sizing performance (the results are shown in Table 2).

[0054] Example 8

[0055] 20g oxidized starch, 2g glycerol, 2g 1-butyl-3-methylimidazolium tetrafluoroborate and 476g deionized water were added to a three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, heated to 95°C in a water bath, and kept warm for 60min to obtain a starch / glycerol / ionic liquid paste. 100g of the paste was taken to test the slurry viscosity and viscosity stability;

[0056] The remaining paste was poured into a 500 mL beaker, and polyester-cotton yarn (T / C80 / 20) was placed in the beaker and kept at 95°C for 5 min. The yarn was taken out and dried naturally, and placed in an environment with a relative humidity of 68% for 3 days to test the sizing performance (the results are shown in Table 2).

[0057] Comparative Example 1 is similar to Example 1, except that the composite slurry raw materials are 6 g oxidized starch, 1.2 g glycerol and 92.8 g deionized water, and the slurry film performance is tested (the results are shown in Table 1).

[0058] Comparative Example 2 is similar to Example 5, except that the composite slurry raw materials are 20 g oxidized starch, 4 g glycerol and 476 g deionized water, and the slurry viscosity, viscosity stability and sizing performance are tested (the results are shown in Table 2).

[0059] Table 1 Effect of ionic liquid addition on mechanical properties of composite slurry membrane

[0060]

[0061] Table 2 Effect of ionic liquid addition on composite slurry viscosity, viscosity stability and sizing adhesion

[0062]

[0063] It can be seen from Table 1 that with the increase in the amount of ionic liquid added, the tensile strength of the composite slurry film gradually increases, and the elongation at break first increases and then decreases, reaching a peak value in Example 2. Figure 1 It can be seen that the absorption peak of hydroxyl stretching vibration has a blue shift, indicating that the interaction between ionic liquid and starch is enhanced.

[0064] It can be seen from Table 2 that with the increase of the amount of ionic liquid added, the viscosity of the composite slurry decreases, the viscosity stability increases, and the breaking strength, elongation at break and work of rupture of the polyester-cotton roving after sizing increase. This is because the ionic liquid can enhance the interaction between starch and the roving surface.

[0065] The above performance tests are divided into the following items:

[0066] (1) Serous membrane infrared spectroscopy analysis

[0067] The infrared spectrum analysis of the serous membrane in the embodiment of the present invention was measured by using an FTS3000 infrared spectrometer with a wave number range of 400-4000cm -1 , the number of scans is 32 times, and the resolution is 2cm -1 .

[0068] (2) Test of mechanical properties of serous membrane

[0069] In the embodiments of the present invention, the mechanical properties of the size film are measured using a YG065 electronic fabric strength meter, with an initial size film distance of 100 mm, a tensile rate of 100 mm / min, 10 tests, and an average value.

[0070] (3) Slurry viscosity and stability test

[0071] In the embodiments of the present invention, the viscosity and stability of the slurry are measured using an NDJ-5S digital viscometer, and the viscosity of the slurry at 60 min, 90 min, 120 min, 150 min and 180 min is measured; the formula involved is as follows:

[0072]

[0073] Among them, η s and η a are viscosity stability and viscosity at 60 min, η max and η min The maximum viscosity and the minimum viscosity respectively.

[0074] (4) Sizing adhesion performance test

[0075] In the embodiment of the present invention, the adhesion performance of the sizing yarn is measured by using a YG065 electronic fabric strength tester, with the initial distance of the yarn being 100 mm, the tensile rate being 100 mm / min, the number of tests being 10, and the average value being taken.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0077] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A starch / glycerol / ionic liquid composite slurry, characterized in that: It is composed of the following raw materials in terms of mass fraction: 100 parts of starch; Glycerin 17.5-10 parts; 2.5-10 parts of ionic liquid.

2. The starch / glycerol / ionic liquid composite slurry according to claim 1, characterized in that: The starch is one of oxidized starch, acidic starch or esterified starch.

3. The starch / glycerol / ionic liquid composite slurry according to claim 1, characterized in that: The ionic liquid is one of 1-butyl-3-methylimidazolium tetrafluoroborate and 1-butyl-3-methylimidazolium bromide.

4. The method for preparing the starch / glycerol / ionic liquid composite slurry according to any one of claims 1 to 3, characterized in that: The following steps are involved: (1) adding 100 parts of starch, 17.5-10 parts of glycerol, and 2.5-10 parts of ionic liquid into a mixer and mixing them uniformly to obtain a mixed component; (2) 4-6 parts of the mixed components and 94-96 parts of deionized water were added to a three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, and heated to 95° C. in a water bath and kept warm for 60 minutes to obtain a starch / glycerol / ionic liquid composite slurry.

5. Use of the composite slurry according to any one of claims 1 to 4 in sizing polyester-cotton warp yarns.

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