Molecular sieve adsorption paper strongly crosslinked by polyester fibers and preparation method of molecular sieve adsorption paper

Abstract

The invention relates to the technical field of specialty paper, molecular sieve / polyester fiber compounding and adsorption material preparation, in particular to polyester fiber strongly-crosslinked molecular sieve adsorption paper and a preparation method thereof.The preparation method comprises the following steps that 1, polyester fibers, aramid pulp and aramid precipitation are used for preparing a suspension A; step 2, adding molecular sieves with different contents into the suspension A to obtain mixed system slurry B; and step 3, preparing the molecular sieve adsorption paper strongly crosslinked by polyester fibers through the procedures of homogenization, rapid suction filtration, cold-pressing dehydration and vacuum drying. By optimizing the composite structure of the polyester fibers and the molecular sieves, the polyester fibers are used for guaranteeing the form and structural stability of the paper, the molecular sieves are used for regulating and controlling the adsorption and separation performance, and the vacuum drying technology is combined, so that the problems that traditional paper is low in strength and weak in combination, and particulate matter cannot be left are solved.

Description

Technical Field

[0001] The invention relates to the technical field of special paper, molecular sieve / polyester fiber composite paper and adsorption material preparation, and in particular to a polyester fiber strongly cross-linked molecular sieve adsorption paper and a preparation method thereof. Background Art

[0002] The development of polyester fiber paper is closely linked to the evolution of material technology and industrial demand. In the mid-20th century, the synthetic fiber industry emerged and polyester fiber was born. However, traditional papermaking technology was limited in performance expansion and could not meet the industry's pursuit of high performance of paper, which prompted the exploration of polyester fiber paper. In the late 20th century, polyester fiber production technology matured and costs decreased. Its high strength, moisture resistance, smoothness, dimensional stability and other performance advantages made it widely used in packaging, printing and other fields. Special papers such as oil-resistant, high-temperature resistant, and anti-static have also been developed through modified composites. In the 21st century, based on the environmental advantages of recycled materials and controllable pollution, driven by technological iterations and market demand, the application boundaries of polyester fiber paper continue to expand, playing an important role in the global supply chain.

[0003] Polyester fiber has the advantages of high strength, dimensional stability, chemical stability and strong processability. Reasonable optimization of the structure of polyester fiber paper can further expand its application efficiency. For example, in CN107653734A, the surface of polyester fiber is grafted and modified by plasma method, and laminated with polytetrafluoroethylene ultra-thin film to improve papermaking efficiency and paper performance, enhance the bonding strength between fiber and matrix material and the hydrophilicity of paper; in CN 222119131U, a loosely structured polyester layer with through holes is provided to buffer external force and increase wear resistance, and an antistatic layer is formed by coating an antistatic agent to improve the antistatic and practical performance of release paper; in CN 222201923 U, a polyester fiber layer is provided above and below the base layer, and a wave peak water absorption layer is provided thereon to increase the water absorption effect of the wipe paper body and enhance the absorption capacity of humidity.

[0004] Molecular sieves are a type of material with a regular microporous structure. The pore size is uniform and comparable to the molecular size. Different molecules can be separated by adsorption and sieving. It originated from the discovery of natural zeolites and has been developed into various types through artificial synthesis technology. It is widely used in many fields such as gas drying, purification, separation and catalysis. It is an important functional material in industrial production and environmental governance. Due to its regular microporous structure, molecular sieves can physically adsorb VOCs, load active metals to catalyze the oxidation of VOCs and convert them into harmless substances, and can separate and recycle VOCs according to the molecular characteristics of VOCs. It plays an important role in VOCs treatment and resource utilization, and is one of the effective materials for dealing with VOCs pollution and resource recycling.

[0005] At present, polyester fiber paper is widely used in packaging, printing and industrial fields, and molecular sieves are also widely used in petrochemical, gas separation and purification, environmental governance and food industry. However, traditional polyester fiber paper has disadvantages such as poor adsorption selectivity and low separation efficiency of specific substances. How to achieve efficient compounding with molecular sieves to meet the needs of chemical, environmental protection, energy and other fields for precise adsorption and efficient separation materials has become a key problem restricting the development of polyester fiber / molecular sieve adsorption paper. Summary of the invention

[0006] In view of the problems of poor adsorption selectivity and low separation efficiency of specific substances in traditional polyester fiber paper in the prior art, the present invention provides a molecular sieve adsorption paper with strongly cross-linked polyester fibers and a preparation method thereof.

[0007] The present invention is achieved through the following technical solutions: A method for preparing polyester fiber strongly cross-linked molecular sieve adsorption paper comprises the following steps: S1, weigh a certain amount of polyester fiber, aramid pulp and aramid precipitate and mix them evenly, add (200-400) mL of water, let stand for (10-12) h, and prepare suspension A; S2, adding suspension A, molecular sieve and PEO dispersion into a decomposition tank in sequence, and obtaining mixed system slurry B through decomposition; S3, forming a surface layer wet paper web by subjecting the mixed system slurry B to slurry dilution, turbulent homogenization and negative pressure dehydration; S4, cold-pressing and dehydrating the surface wet paper web, and vacuum drying it in the drying section of the paper sheet former to obtain a molecular sieve adsorption paper with highly efficient adsorption performance and strongly cross-linked polyester fibers.

[0008] Preferably, in S1, the length of the polyester fiber is (5-6) mm; The aramid pulp is para-aramid fiber, with a beating degree of (45-48)°SR and a specific surface area of ​​(9-11) m² / g; Aramid precipitation is a differentiated product of meta-aramid fiber, with a beating degree of (45-50)°SR and a moisture content of (70-85)%.

[0009] Preferably, in S1, the total absolute dry weight ratio of the polyester fiber, the aramid pulp and the aramid precipitate is (0.69-0.70) g: (2.18-2.19) g: (4.01-4.02) g.

[0010] Preferably, in S2, the total absolute dry weight of the molecular sieve is (0.00-3.00) g; The concentration of the polyethylene oxide dispersion is (10-15) g / L, and the measured volume is (20.00-21.00) mL; During degassing, the number of revolutions is (25000~30000) rpm.

[0011] Preferably, in S3, during dilution, the amount of water added is (2.0-3.0) L; When turbulent homogenization, homogenize (8-10) times; During negative pressure dehydration, water is vacuumed through a (80-100) mesh forming net, the vacuum degree is (0.080-0.098) MPa, and the vacuum pumping time is (20-25) s.

[0012] Preferably, in S4, during the cold pressing dehydration, absorbent felt pads are used on both the upper and lower sides of the superimposed wet paper webs, the pressing pressure is (8.5-10.5) MPa, and the pressing time is (5-10) min.

[0013] Preferably, in S4, during the vacuum drying treatment, the temperature is (105-120)°C, the vacuum degree is (0.7-0.9) MPa, and the time is (10-15) min.

[0014] A molecular sieve adsorption paper obtained by the method for preparing a molecular sieve adsorption paper with strongly cross-linked polyester fibers.

[0015] A molecular sieve adsorption paper obtained by the method for preparing a polyester fiber strongly cross-linked molecular sieve adsorption paper is used for adsorbing PM2.5, toluene or formaldehyde.

[0016] Compared with the prior art, the present invention has the following beneficial effects: Firstly, the method for preparing a molecular sieve adsorption paper with strongly cross-linked polyester fibers of the present invention constructs a structural support system by means of the high strength and flexibility imparted by the macromolecular chain structure of the polyester fibers; by means of adaptive surface properties and good processability, the composite process with the molecular sieve is promoted by means of impregnation, blending, etc., to ensure uniform dispersion of the molecular sieve; its pores provide channels for fluid transmission, and active groups such as hydroxyl groups and carboxyl groups are introduced on its surface through chemical modification, which not only provide chemical adsorption sites, but also synergize with the molecular sieve to improve the adsorption efficiency of the target molecules and enhance the overall performance.

[0017] By introducing molecular sieves into polyester fiber paper, we can prepare polyester fiber strongly cross-linked molecular sieve adsorption paper with high adsorption performance, which can solve the problem that traditional paper is difficult to adsorb harmful gases and filter fine particles. It can be further used in electronic gas purification, catalyst carriers and separation, gas adsorption and release of aerospace materials and other fields.

[0018] Secondly, the present application discloses a method for preparing a polyester fiber strongly cross-linked molecular sieve adsorption paper, which preferably uses a composite structure of polyester fiber and molecular sieve as the functional part. The reagents and raw materials used are all conventional medicines, which have the advantages of medical ethics and controllable costs, and lays a formula foundation for the industrialization of polyester fiber paper.

[0019] Furthermore, the present invention plays a good protective role through the molecular sieve structure. Specifically, the molecular sieve structure has regular pores and cage structures. When contacting chemical substances such as acids and alkalis, these molecular sieve structures can prevent the chemical substances from directly contacting the main structure of the fiber paper to a certain extent, and isolate the harmful chemical substances outside the key structure of the fiber paper, thereby protecting the chemical stability of the fiber paper. At the same time, the molecular sieve structure itself has a certain chemical inertness, and its components can resist the erosion of acids and alkalis, making the entire material more stable in a chemical environment.

[0020] The product obtained by the preparation process of the molecular sieve adsorption paper with strong crosslinking of polyester fibers in the present invention has good selective adsorption capacity and separation capacity. This is because the molecular sieve adsorption paper with strong crosslinking of polyester fibers has regular pores and void structures inside, and the size of these pores matches the size of the molecules to be separated. It can screen similar molecules or molecules with specific structures according to molecular size, shape and chemical properties, and accurately separate target substances; and its surface carries specific functional groups or charges, and these functional groups and charges can produce specific interactions with target molecules, so that its selective adsorption capacity is greatly improved, and it can accurately adsorb target molecules such as heavy metal ions and organic pollutants, reduce the adsorption of non-target molecules, and avoid the influence of traditional paper on separation and purification effects due to broad adsorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a flow chart of a method for preparing a polyester fiber strongly cross-linked molecular sieve adsorption paper according to the present invention; Figure 2 This is a SEM magnified image of the surface of the molecular sieve adsorption paper with strongly cross-linked polyester fibers obtained in Example 1; Figure 3 This is a SEM magnified image of the surface of the molecular sieve adsorption paper with strongly cross-linked polyester fibers obtained in Example 3; Figure 4 This is a SEM magnified image of the surface of the molecular sieve adsorption paper with strongly cross-linked polyester fibers obtained in Example 5; Figure 5 It is the XRD performance test of the molecular sieve adsorption paper with strongly cross-linked polyester fibers in implementation cases 1, 2, 3, 4, and 5.

[0022] Figure 6 This is a graph showing the filtration efficiency of PM2.5 for implementation schemes 1, 2, 3, 4, and 5 of the strongly cross-linked polyester fiber molecular sieve adsorption paper.

[0023] Figure 7 It is a graph showing the adsorption efficiency of formaldehyde by the strongly cross-linked molecular sieve adsorption paper of polyester fibers in implementation schemes 1, 2, 3, 4, and 5. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0025] The present invention discloses a method for preparing a molecular sieve adsorption paper with strong crosslinking of polyester fibers. Figure 1 , including the following steps: S1. Weigh a certain amount of polyester fiber, aramid pulp and aramid precipitate and mix them evenly, add (200-400) mL of water, let stand for (10-12) h, and prepare suspension A.

[0026] Among them, the length of polyester fiber is (5-6) mm, and the total absolute dry weight is (0.69-0.70) g; the aramid pulp is para-aramid fiber, the beating degree is (45-48) °SR, the specific surface area is (9-11) m² / g, and the total absolute dry weight is (2.18-2.19) g; the aramid precipitate is a differentiated product of meta-aramid fiber, the beating degree is (45-50) °SR, the moisture content is (70-85)%, and the total absolute dry weight is (4.01-4.02) g.

[0027] S2, add suspension A, molecular sieve and PEO dispersion into the deflaking tank in sequence, and obtain mixed system slurry B by deflaking (25000-30000) rpm.

[0028] The total absolute dry weight of the molecular sieve is (0.00-3.00) g, the concentration of the polyethylene oxide (PEO) dispersion is (10-15) g / L, and the measured volume is (20.00-21.00) mL.

[0029] S3, the mixed system slurry B is subjected to slurry dilution, turbulent homogenization and negative pressure dehydration to form a surface layer wet paper web; wherein, the amount of water added for dilution is (2.0-3.0) L; the turbulent homogenization is (8-10) times; vacuum water is pumped through a (80-100) mesh forming wire, the vacuum degree is (0.080-0.098) MPa, and the vacuum water pumping time is (20-25) s.

[0030] S4, cold-pressing and dehydrating the surface wet paper web, and vacuum drying in the drying section of the paper sheet former to obtain a highly efficient adsorption performance polyester fiber strongly cross-linked molecular sieve adsorption paper. Wherein, when the surface wet paper web is cold-pressed and dehydrated by a cold press, absorbent felt pads are used on the upper and lower sides of the superimposed wet paper webs, the pressing pressure is (8.5-10.5) MPa, and the time is (5-10) min; during the vacuum drying treatment, the temperature is (105-120) ° C, the vacuum degree is (0.7-0.9) MPa, and the time is (10-15) min.

[0031] The method for preparing the molecular sieve adsorption paper with strong crosslinking of polyester fibers of the present invention firstly prepares a suspension A by using polyester fibers, aramid pulp and aramid precipitation, then adds different contents of molecular sieves into the suspension A to obtain a mixed system slurry B, and then prepares the molecular sieve adsorption paper with strong crosslinking of polyester fibers through homogenization, rapid filtration, cold pressing dehydration and vacuum drying processes. By optimizing the composite structure of polyester fibers and molecular sieves, using polyester fibers to ensure the stability of the paper shape and structure, using molecular sieves to regulate the adsorption and separation performance, and combining the vacuum drying technology, the problems of low strength, weak bonding and inability to retain particles in traditional paper are solved.

[0032] Example 1 Step 1, weigh 0.69g of polyester fiber with a length of 6mm, 2.18g of aramid pulp with a beating degree of 45°SR and a specific surface area of ​​10m² / g, and 4.0154g of aramid precipitate with a beating degree of 45°SR and a water content of 85%, add 300mL of water, let stand for 10h, and prepare suspension A.

[0033] Step 2: Suspension A, 0.00 g molecular sieve and 20 mL of 10 g / LPEO dispersion were added into the deflaking tank in sequence, and the mixed system slurry B was obtained by deflaking treatment at a rotation speed of 30,000 rpm.

[0034] Step 3: Add 3.0 L of dilution water to the mixed system slurry B, perform 10 times of turbulent homogenization and 25 seconds of negative pressure dehydration on an 80-mesh forming wire to form a surface layer wet paper web.

[0035] Step 4: pad the upper and lower wet paper webs with absorbent felt, dehydrate them for 5 minutes using a cold press with a pressing pressure of 9.0 MPa, and dry them in the drying section of a paper sheet former at a temperature of 105°C and a vacuum degree of 0.8 MPa for 10 minutes to obtain molecular sieve adsorption paper with strongly cross-linked polyester fibers.

[0036] The polyester fiber strongly cross-linked molecular sieve adsorption paper obtained in this example has a basis weight of 110 g / m 2 The finished paper weight is 3.81g and the air permeability is 21.20μm / (Pa·s), which can be used to adsorb VOCs such as toluene and formaldehyde.

[0037] Example 2 Step 1, weigh 0.69g of polyester fiber with a length of 6mm, 2.18g of aramid pulp with a beating degree of 45°SR and a specific surface area of ​​10m² / g, and 4.0147g of aramid precipitate with a beating degree of 45°SR and a water content of 85%, add 300mL of water, let stand for 10h, and prepare suspension A.

[0038] Step 2: Suspension A, 0.80 g molecular sieve and 20 mL of 10 g / LPEO dispersion were added into the deflaking tank in sequence, and the mixed system slurry B was obtained by deflaking treatment at a rotation speed of 30,000 rpm.

[0039] Step 3: Add 3.0 L of dilution water to the mixed system slurry B, perform 10 times of turbulent homogenization and 25 seconds of negative pressure dehydration on an 80-mesh forming wire to form a surface layer wet paper web.

[0040] Step 4: pad the upper and lower wet paper webs with absorbent felt, dehydrate them for 5 minutes using a cold press with a pressing pressure of 9.0 MPa, and dry them in the drying section of a paper sheet former at a temperature of 105°C and a vacuum degree of 0.8 MPa for 10 minutes to obtain molecular sieve adsorption paper with strongly cross-linked polyester fibers.

[0041] The polyester fiber strongly cross-linked molecular sieve adsorption paper obtained in this example has a basis weight of 110 g / m 2 The finished paper weight is 4.12g and the air permeability is 16.87μm / (Pa·s), which can be used to adsorb VOCs such as toluene and formaldehyde.

[0042] Example 3 Step 1, weigh 0.69g of polyester fiber with a length of 6mm, 2.18g of aramid pulp with a beating degree of 45°SR and a specific surface area of ​​10m² / g, and 4.0130g of aramid precipitate with a beating degree of 45°SR and a water content of 85%, add 300mL of water, let stand for 10h, and prepare suspension A.

[0043] Step 2: Suspension A, 1.60 g of molecular sieve and 20 mL of 10 g / LPEO dispersion were added to the deflaking tank in sequence, and a mixed system slurry B was obtained by deflaking treatment at a rotation speed of 30,000 rpm.

[0044] Step 3: Add 3.0 L of dilution water to the mixed system slurry B, perform 10 times of turbulent homogenization and 25 seconds of negative pressure dehydration on an 80-mesh forming wire to form a surface layer wet paper web.

[0045] Step 4: pad the upper and lower wet paper webs with absorbent felt, dehydrate them for 5 minutes using a cold press with a pressing pressure of 9.0 MPa, and dry them in the drying section of a paper sheet former at a temperature of 105°C and a vacuum degree of 0.8 MPa for 10 minutes to obtain molecular sieve adsorption paper with strongly cross-linked polyester fibers.

[0046] The polyester fiber strongly cross-linked molecular sieve adsorption paper obtained in this example has a basis weight of 110 g / m 2 The finished paper weight is 4.71g and the air permeability is 4.16μm / (Pa·s), which can be used to adsorb VOCs such as toluene and formaldehyde.

[0047] Example 4 Step 1, weigh 0.69 g of polyester fiber with a length of 6 mm, 2.18 g of aramid pulp with a beating degree of 45°SR and a specific surface area of ​​10 m² / g, and 4.01 g of aramid precipitate with a beating degree of 45°SR and a water content of 85%, add 300 mL of water, and let stand for 10 hours to prepare a suspension A.

[0048] Step 2: Suspension A, 2.40 g of molecular sieve and 20 mL of 10 g / LPEO dispersion were added to the deflaking tank in sequence, and a mixed system slurry B was obtained by deflaking treatment at a rotation speed of 30,000 rpm.

[0049] Step 3: Add 3.0 L of dilution water to the mixed system slurry B, perform 10 times of turbulent homogenization and 25 seconds of negative pressure dehydration on an 80-mesh forming wire to form a surface layer wet paper web.

[0050] Step 4: pad the upper and lower wet paper webs with absorbent felt, dehydrate them for 5 minutes using a cold press with a pressing pressure of 9.0 MPa, and dry them in the drying section of a paper sheet former at a temperature of 105°C and a vacuum degree of 0.8 MPa for 10 minutes to obtain molecular sieve adsorption paper with strongly cross-linked polyester fibers.

[0051] The polyester fiber strongly cross-linked molecular sieve adsorption paper obtained in this example has a basis weight of 110 g / m 2 The finished paper weight is 4.93g and the air permeability is 13.77μm / (Pa·s), which can be used to adsorb VOCs such as toluene and formaldehyde.

[0052] Example 5 Step 1, weigh 0.69 g of polyester fiber with a length of 6 mm, 2.18 g of aramid pulp with a beating degree of 45°SR and a specific surface area of ​​10 m² / g, and 4.01 g of aramid precipitate with a beating degree of 45°SR and a water content of 85%, add 300 mL of water, and let stand for 10 hours to prepare a suspension A.

[0053] Step 2: Suspension A, 3.00 g of molecular sieve and 20 mL of 10 g / LPEO dispersion were added to the deflaking tank in sequence, and a mixed system slurry B was obtained by deflaking treatment at a rotation speed of 30,000 rpm.

[0054] Step 3: Add 3.0 L of dilution water to the mixed system slurry B, perform 10 times of turbulent homogenization and 25 seconds of negative pressure dehydration on an 80-mesh forming wire to form a surface layer wet paper web.

[0055] Step 4: pad the upper and lower wet paper webs with absorbent felt, dehydrate them for 5 minutes using a cold press with a pressing pressure of 9.0 MPa, and dry them in the drying section of a paper sheet former at a temperature of 105°C and a vacuum degree of 0.8 MPa for 10 minutes to obtain molecular sieve adsorption paper with strongly cross-linked polyester fibers.

[0056] The polyester fiber strongly cross-linked molecular sieve adsorption paper obtained in this example has a basis weight of 110 g / m 2 The finished paper weight is 5.11g and the air permeability is 9.52μm / (Pa·s), which can be used to adsorb VOCs such as toluene and formaldehyde.

[0057] Figure 2 , 3 4 is a SEM magnified image of the surface of the molecular sieve adsorption paper with strong crosslinking of polyester fibers obtained in Examples 1, 3, and 5. It can be observed from the figure that as the molecular sieve content increases, the molecular sieve gradually and tightly fills the three-dimensional gap formed by the interweaving of aramid pulp and precipitate. In addition, polyester fibers use their internal pores to build pathways for fluid transmission, and the active groups on their surface can introduce additional adsorption sites, forming a synergistic effect with the molecular sieve, effectively promoting the improvement of the adsorption efficiency of the target molecules, and ultimately strengthening the overall adsorption performance of the paper.

[0058] Figure 5 The XRD spectra of the molecular sieve adsorption paper containing 0.00g, 0.80g, 1.60g, 2.40g and 3.00g of strongly cross-linked polyester fiber show that there are five sharp and strong peaks in the range of 2θ=20~35° (i.e., 21°, 23°, 27°, 29°, and 34°), which represent the characteristic peaks of the molecular sieve, indicating that there are molecular sieves with high crystallinity and relatively complete in the paper base; among them, the relatively gentle peaks (20.3° and 22.8°) in the range of 2θ=20~22.8° are the characteristic peaks of polyester fibers, indicating that the molecular sieves are distributed in the paper base material, and it can be observed that with the gradual increase in the amount of molecular sieve added, the five sharp characteristic peaks representing the molecular sieves (21°, 23°, 27°, 29°, and 34°) also gradually become more and more obvious.

[0059] Figure 6 The PM2.5 filtration efficiency of the molecular sieve adsorption paper with strong cross-linking of polyester fibers is shown in the figure. It can be clearly observed that the sample paper obtained in the implementation case has a good filtration effect on PM2.5, and with the increase of the molecular sieve content, the filtration efficiency shows an upward trend. When the molecular sieve content is 3.00g, the filtration efficiency reaches 93.80%. However, when the molecular sieve content reaches a certain level, the effect of improving the filtration efficiency weakens.

[0060] Figure 7This is a graph of the adsorption efficiency of the molecular sieve adsorption paper with strong cross-linking of polyester fibers for formaldehyde. It can be seen that with the increase of the molecular sieve content, the adsorption efficiency of the sample paper obtained in the implementation case for formaldehyde shows a downward trend. When the molecular sieve content is 0.00g, the adsorption efficiency is 84.11%; when the molecular sieve content is 3.00g, the adsorption efficiency is 33.36%.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and substitutions, and these modifications and substitutions are also within the scope of protection covered by the claims.

Claims

1. A method for preparing a molecular sieve adsorption paper with strong crosslinking of polyester fibers, characterized in that: The steps include: S1, weigh a certain amount of polyester fiber, aramid pulp and aramid precipitate and mix them evenly, add (200-400) mL of water, let stand for (10-12) h, and prepare suspension A; S2, adding suspension A, molecular sieve and PEO dispersion into a decomposition tank in sequence, and obtaining mixed system slurry B by decomposition; S3, forming a surface layer wet paper web by subjecting the mixed system slurry B to slurry dilution, turbulent homogenization and negative pressure dehydration; S4, cold-pressing and dehydrating the surface wet paper web, and vacuum drying it in the drying section of the paper sheet former to obtain a molecular sieve adsorption paper with highly efficient adsorption performance and strongly cross-linked polyester fibers.

2. The method for preparing a polyester fiber strongly cross-linked molecular sieve adsorption paper according to claim 1, characterized in that: In S1, the length of the polyester fiber is (5-6) mm; The aramid pulp is para-aramid fiber, with a beating degree of (45-48)°SR and a specific surface area of ​​(9-11) m² / g; Aramid precipitation is a differentiated product of meta-aramid fiber with a beating degree of (45-50)°SR and a moisture content of (70-85)%.

3. The method for preparing a polyester fiber strongly cross-linked molecular sieve adsorption paper according to claim 1, characterized in that: In S1, the total absolute dry weight ratio of polyester fiber, aramid pulp and aramid precipitate is (0.69-0.70) g: (2.18-2.19) g: (4.01-4.02) g.

4. The method for preparing a polyester fiber strongly cross-linked molecular sieve adsorption paper according to claim 1, characterized in that: In S2, the total absolute dry weight of the molecular sieve is (0.00-3.00) g; The concentration of the polyethylene oxide dispersion is (10-15) g / L, and the measured volume is (20.00-21.00) mL; During degassing, the number of revolutions is (25000~30000) rpm.

5. The method for preparing a polyester fiber strongly cross-linked molecular sieve adsorption paper according to claim 1, characterized in that: In S3, when diluting, the amount of water added is (2.0~3.0)L; When turbulent homogenization, homogenize (8-10) times; During negative pressure dehydration, water is vacuumed through a (80-100) mesh forming net, the vacuum degree is (0.080-0.098) MPa, and the vacuum pumping time is (20-25) s.

6. The method for preparing a polyester fiber strongly cross-linked molecular sieve adsorption paper according to claim 1, characterized in that: In S4, during cold pressing and dehydration, absorbent felt pads are used on the upper and lower sides of the superimposed wet paper webs, the pressing pressure is (8.5~10.5) MPa, and the pressing time is (5~10) min.

7. The method for preparing a polyester fiber strongly cross-linked molecular sieve adsorption paper according to claim 1, characterized in that: In S4, during the vacuum drying treatment, the temperature is (105-120)°C, the vacuum degree is (0.7-0.9) MPa, and the time is (10-15) min.

8. A molecular sieve adsorption paper obtained by the method for preparing a molecular sieve adsorption paper with strongly cross-linked polyester fibers as described in any one of claims 1 to 7.

9. Use of the molecular sieve adsorption paper obtained by the method for preparing a polyester fiber strongly cross-linked molecular sieve adsorption paper according to any one of claims 1 to 7 in adsorbing PM2.5, toluene or formaldehyde.

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