Water surface oil blocking device and application thereof

Abstract

The invention relates to the field of water surface oil blocking, in particular to a water surface oil blocking device which comprises at least two fixing blocks and an oil blocking assembly arranged between the fixing blocks. The oil blocking assembly comprises an oil blocking piece and at least two sets of floating blocks arranged on the two sides of the oil blocking piece. A sliding groove is formed in the fixed block and used for limiting the floating block in the sliding groove, and the floating block is arranged to be capable of ascending and descending in the sliding groove; compared with a traditional oil blocking device, the water surface oil blocking device does not adsorb water on the surface of a water body but only adsorbs floating oil on the surface, still floats on the water surface after adsorption saturation and can absorb oil while blocking oil, and accidental phenomena such as oil spilling and oil leakage are effectively prevented.

Description

Technical Field

[0001] The invention relates to the field of water surface oil interception, and in particular to a water surface oil interception device and application thereof. Background Art

[0002] With the deepening of the work of "energy conservation and carbon reduction", the utilization rate of water resources has been continuously improved, and the refining industry has taken water efficiency as an important indicator of "energy conservation and carbon reduction". Rainwater reuse has gradually become an important means to improve the utilization rate of water resources, especially in the southern region with abundant rainwater. The waste oil generated in the chemical production process is often washed into the rainwater pool by rainwater. The waste oil in the rainwater pool not only increases the cost of rainwater discharge, but also increases the difficulty of rainwater reuse. It is an effective means to intercept the oil in the device area and centrally treat it. At present, most of the oil interception ropes only intercept oil but do not absorb oil, which is easy to cause oil spills and leaks during use.

[0003] CN112551640A discloses an oil-blocking rope for cleaning dirty oil and a method for cleaning dirty oil. It uses polyurethane foam to form oil absorption units by hot pressing. The oil absorption units are connected to form an oil-blocking rope. Although it has the effect of absorbing oil, it is more about surrounding oil rather than blocking oil during use. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the oil intercepting rope in the prior art that oil spills and oil leaks easily occur, and to provide a surface oil intercepting device and its application. Compared with the traditional oil intercepting device, the surface oil intercepting device of the present invention does not absorb water on the surface of the water body but only absorbs the floating oil on the surface, and still floats on the water surface after saturation adsorption, and can absorb oil while intercepting oil, thereby effectively preventing unexpected phenomena such as oil spills and oil leaks.

[0005] In order to achieve the above-mentioned object, the first aspect of the present invention provides a surface oil interception device, the device comprising: at least two fixed blocks and an oil interception assembly arranged between the fixed blocks;

[0006] The oil blocking assembly comprises an oil blocking member and at least two groups of floating blocks arranged on both sides of the oil blocking member;

[0007] The fixed block is provided with a slide groove, which is used to restrict the floating block in the slide groove, and the floating block is configured to be able to rise and fall in the slide groove;

[0008] The oil-blocking material includes an oil-absorbing sponge, which includes a three-dimensional porous polymer matrix and a thermosetting resin coated on the three-dimensional porous polymer matrix; the saturated adsorption capacity of the oil-absorbing sponge for oil products is not less than 30g / g; the saturated adsorption capacity of the oil-absorbing sponge for oil products is still not less than 30g / g after 30 adsorption-desorption cycles.

[0009] A second aspect of the present invention provides an application of the surface oil intercepting device of the present invention in the treatment of floating oil on the surface of the water.

[0010] Through the above technical scheme, in the water surface oil intercepting device described in the present invention, the oil-absorbing sponge has super-hydrophobic and super-oleophilic properties on the basis of maintaining the high resilience and high porosity of the original three-dimensional porous polymer matrix; compared with the traditional oil intercepting device, the water surface oil intercepting device does not absorb water on the surface of the water body but only absorbs the floating oil on the surface, and still floats on the water surface after saturation adsorption, and can absorb oil while intercepting oil, effectively preventing unexpected phenomena such as oil overflow and oil leakage.

[0011] Since the oil-absorbing sponge has a high selective adsorption capacity for the oil phase, a large adsorption capacity for the oil phase and can be recycled, the adsorption capacity is basically not attenuated when recycled 30 times; after adsorption saturation, the oil phase adsorbed by the oil-absorbing sponge can be desorbed by squeezing, combined with the high resilience of the sponge, the oil-absorbing sponge material and the oil phase can be separated, thereby realizing the reuse of the sponge material.

[0012] The oil intercepting device of the present invention can be placed at the gate, on both sides of the river, so that the oil intercepting member and the floating block can float up and down with the water level, and always play the role of intercepting and absorbing oil. At the same time, the oil intercepting material on the water surface can fully protect the gate and prevent the spread of floating oil on the water surface.

[0013] Figure 1 It is a top view of a water surface oil intercepting device provided by one embodiment of the present invention;

[0014] Figure 2 is a scanning electron microscope (SEM) image of the oil-absorbing sponge prepared in Preparation Example 1;

[0015] Figure 3 is a scanning electron microscope (SEM) image of the oil-absorbing sponge prepared in Preparation Example 1 after 30 cycles;

[0016] Figure 4 is a scanning electron microscope (SEM) image of the porous melamine-formaldehyde sponge matrix in Preparation Example 1;

[0017] Figure 5 is a scanning electron microscope (SEM) image of the oil-absorbing sponge prepared in Preparation Example 8;

[0018] Figure 6 is a scanning electron microscope (SEM) image of the oil-absorbing sponge prepared in Preparation Example 8 after 30 cycles;

[0019] Figure 7 It is a front view of a fixed block in a surface oil intercepting device provided by an embodiment of the present invention;

[0020] Figure 8It is a front view of an oil intercepting member in a surface oil intercepting device provided in a preferred embodiment of the present invention.

[0021] Description of Reference Numerals

[0022] 1—Nylon rope 2—Oil blocking parts

[0023] 3—Floating block 4—Fixed block

[0024] 5—chute 6—oil blocking component DETAILED DESCRIPTION

[0025] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0026] In the present invention, unless otherwise specified, directional words such as "up, down, left, right" generally refer to up, down, left, right as shown in the reference drawings; "inside, outside" refer to inside and outside relative to the outline of each component itself.

[0027] A first aspect of the present invention provides a surface oil interception device, the device comprising: at least two fixed blocks and an oil interception assembly arranged between the fixed blocks;

[0028] The oil blocking assembly comprises an oil blocking member and at least two groups of floating blocks arranged on both sides of the oil blocking member;

[0029] The fixed block is provided with a slide groove, which is used to restrict the floating block in the slide groove, and the floating block is configured to be able to rise and fall in the slide groove;

[0030] The oil-blocking material includes an oil-absorbing sponge, which includes a three-dimensional porous polymer matrix and a thermosetting resin coated on the three-dimensional porous polymer matrix; the saturated adsorption capacity of the oil-absorbing sponge for oil products is not less than 30g / g; the saturated adsorption capacity of the oil-absorbing sponge for oil products is still not less than 30g / g after 30 adsorption-desorption cycles.

[0031] In the present invention, the shape of the slide groove can be selected in a wide range, as long as the floating block can be confined in the slide groove and the floating block can be lifted and lowered in the slide groove. According to a preferred embodiment of the present invention, the shape of the slide groove is set to be an arc, preferably a circle.

[0032] In the present invention, the shape of the oil retaining member can be selected in a wide range as long as it can fit the water surface. According to a preferred embodiment of the present invention, the shape of the oil retaining member is set to be columnar, preferably cylindrical or polygonal.

[0033] In the present invention, there is no particular limitation on the shape of the floating block, as long as the floating block can be confined in the slide groove and the floating block can be lifted and lowered in the slide groove. According to a preferred embodiment of the present invention, the shape of the floating block is set to be spherical.

[0034] In the present invention, the arrangement of the circular chute and the spherical floating block enables the spherical floating block to slide in the circular chute as the water surface changes, thereby enabling the oil intercepting assembly connected to the spherical floating block to float on the water surface all the time, thereby achieving the oil intercepting effect.

[0035] In the present invention, the material of the floating block can be selected from a wide range, as long as its density is less than the density of water; according to a preferred embodiment of the present invention, the material of the floating block is selected from at least one of foamed polymer materials, preferably at least one of foamed polypropylene, foamed polystyrene and foamed polyvinyl chloride.

[0036] According to a preferred embodiment of the present invention, the roughness Ra value of the outer surface of the floating block is less than 3.2, preferably less than 1.6, which is conducive to the relative sliding between the floating block and the slideway and quickly responds to the change of the water surface height.

[0037] According to a preferred embodiment of the present invention, the surface roughness Ra value of the slideway is less than 3.2, preferably less than 1.6, which is conducive to the relative sliding between the floating block and the slideway and quickly responds to changes in water surface height.

[0038] In the present invention, there is no particular limitation on the connection method between the floating block and the oil blocking member, as long as a soft connection between the floating block and the oil blocking member can be achieved. For example, the floating block and the oil blocking member can be bonded and connected by a nylon rope.

[0039] The oil-absorbing sponge of the present invention has super-hydrophobic and super-oleophilic properties while maintaining the high resilience and high porosity of the original three-dimensional porous polymer matrix. The oil-absorbing sponge has good resilience and strong adsorption capacity for oil products.

[0040] According to a preferred embodiment of the present invention, the mass of the thermosetting resin accounts for 0.5-5%, preferably 2-3%, of the total mass of the sponge.

[0041] According to a preferred embodiment of the present invention, the saturated adsorption capacity of the oil-absorbing sponge for oil is 30-50 g / g.

[0042] The oil-absorbing sponge of the present invention has strong selectivity for oil products in oily wastewater, large adsorption capacity for oil products and can be recycled. The adsorption capacity is basically not attenuated after being recycled for 30 times. According to a preferred embodiment of the present invention, the saturated adsorption capacity of the oil-absorbing sponge for oil products is still 30-50g / g after 30 desorption-adsorption cycles.

[0043] In the present invention, the thermosetting resin can be selected from a wide range, and conventional thermosetting resins in the field can meet the requirements of the present invention. According to a preferred embodiment of the present invention, the thermosetting resin is selected from at least one of phenolic resin, epoxy resin, urea-formaldehyde resin, unsaturated polyester resin and silicone resin; preferably selected from at least one of phenolic resin, epoxy resin and silicone resin.

[0044] In the present invention, the three-dimensional porous polymer matrix only needs to have a through-hole structure inside and a porosity greater than 70%. According to a preferred embodiment of the present invention, the three-dimensional porous polymer matrix is ​​selected from at least one of melamine-formaldehyde sponge, polyurethane sponge and ethylene-vinyl acetate sponge, preferably melamine-formaldehyde sponge.

[0045] In the present invention, the pore size of the oil absorbing sponge can be selected in a wide range. According to a preferred embodiment of the present invention, the pore size of the oil absorbing sponge is 10-500 μm, preferably 100-400 μm.

[0046] In the present invention, the porosity of the oil-absorbing sponge can be selected in a wide range. According to a preferred embodiment of the present invention, the porosity of the oil-absorbing sponge is greater than or equal to 60%, preferably greater than or equal to 90%.

[0047] The oil-absorbing sponge of the present invention has super-hydrophobic and super-oleophilic properties. According to a preferred embodiment of the present invention, the static plane contact angle of the surface of the oil-absorbing sponge to water in air is greater than 135°; preferably greater than 145°.

[0048] The oil-absorbing sponge of the present invention has super-hydrophobic and super-oleophilic properties. According to a preferred embodiment of the present invention, the static contact angle of the surface of the oil-absorbing sponge to white oil is less than 30°; preferably 0-20°; more preferably 0°.

[0049] The oil-absorbing sponge of the present invention also has flame retardant properties; according to a preferred embodiment of the present invention, the UL94 vertical burning test grade of the oil-absorbing sponge is above V-2, preferably above V-1; more preferably V-0.

[0050] According to a preferred embodiment of the present invention, the material containing the oil absorbing sponge is formed into the oil retaining member by melt splicing and / or bonding, preferably by melt splicing.

[0051] According to a preferred embodiment of the present invention, the present invention provides a schematic diagram of a surface oil interception device as shown in Figure 1 As shown, the main view of the fixed block in the surface oil interception device is as follows Figure 7 As shown, the main view of the oil retaining member is as follows Figure 8 As shown; the device includes:

[0052] Two fixed blocks 4 and an oil retaining assembly 6 arranged between the fixed blocks 4;

[0053] The oil blocking assembly 6 includes an oil blocking member 2 and two groups of spherical floating blocks 3 arranged on both sides of the oil blocking member 2;

[0054] The fixed block 4 is provided with an arc-shaped slide groove 5, which is used to restrict the floating block 3 in the arc-shaped slide groove 5, and the floating block 3 is configured to be able to rise and fall in the arc-shaped slide groove 5;

[0055] The oil blocking member 2 is a cylindrical oil-absorbing sponge formed by melt splicing; the oil blocking member 2 is connected to the floating block 3 through a nylon rope 1.

[0056] The oil-absorbing sponges having the above-mentioned characteristics of the present invention can achieve the purpose of the present invention, and there is no special requirement for the preparation method thereof. With respect to the present invention, according to a preferred embodiment of the present invention, the present invention provides a method for preparing the oil-absorbing sponge of the present invention, the method comprising:

[0057] The solution containing the thermosetting resin prepolymer and the curing agent is dispersed into the three-dimensional porous polymer matrix, and cured under vacuum conditions to obtain the oil-absorbing sponge. The preparation method of the present invention disperses (for example, extrusion absorption dispersion, spray absorption dispersion) the solution containing the thermosetting resin prepolymer and the curing agent into the three-dimensional porous polymer matrix and then heats and cures it in vacuum, which can cure the thermosetting resin on the three-dimensional porous polymer matrix while maintaining the high resilience and high porosity of the original three-dimensional porous polymer matrix.

[0058] According to a preferred embodiment of the present invention, the present invention provides a method for preparing the oil-absorbing sponge, the method comprising:

[0059] The solution containing the thermosetting resin prepolymer and the curing agent is dispersed into the three-dimensional porous polymer matrix, and cured under vacuum conditions to obtain the oil-absorbing sponge. The preparation method of the present invention disperses (for example, extrusion absorption dispersion, spray absorption dispersion) the solution containing the thermosetting resin prepolymer and the curing agent into the three-dimensional porous polymer matrix and then heats and cures it in vacuum, which can cure the thermosetting resin on the three-dimensional porous polymer matrix while maintaining the high resilience and high porosity of the original three-dimensional porous polymer matrix.

[0060] In the present invention, there is no particular limitation on the dispersion method of dispersing the solution containing thermosetting resin prepolymer and curing agent into the three-dimensional porous polymer matrix, as long as it can be evenly dispersed. According to a preferred embodiment of the present invention, the dispersion method is extrusion absorption dispersion or spray absorption dispersion, preferably extrusion absorption dispersion.

[0061] In the present invention, extrusion absorption dispersion refers to extruding the three-dimensional porous polymer matrix, placing it in a solution containing a thermosetting resin prepolymer and a curing agent, absorbing and restoring it to its original shape, and then extruding it to a certain proportion to discharge the excess solution and disperse it evenly.

[0062] In the present invention, spray absorption dispersion refers to uniformly dispersing a certain amount of thermosetting resin prepolymer and curing agent solution onto the surface of the three-dimensional porous polymer matrix in a spraying manner, waiting for absorption and then heating and curing.

[0063] In the present invention, the curing pressure may be selected in a wide range. According to a preferred embodiment of the present invention, the pressure is 0 to 10 kPa, preferably 3 to 5 kPa.

[0064] In the present invention, the curing conditions have a wide range of optional ranges. According to a preferred embodiment of the present invention, the curing conditions include: a temperature of 80 to 200°C, preferably 100 to 180°C; the curing time can be reasonably adjusted according to actual needs, preferably, the time is 5 to 120 minutes, more preferably 20 to 100 minutes.

[0065] According to a preferred embodiment of the present invention, the method for preparing the oil-absorbing sponge comprises:

[0066] (1) dispersing a solution containing a thermosetting resin prepolymer and a curing agent into a three-dimensional porous polymer matrix, and pre-curing under a first vacuum condition;

[0067] (2) dispersing a solution containing a thermosetting resin prepolymer and a curing agent into the product obtained in step (1), and curing the product under a second vacuum condition;

[0068] The first vacuum condition and the second vacuum condition each include: a pressure of 0-10KPa;

[0069] Pre-curing conditions include: temperature of 80-120°C;

[0070] Curing conditions include: temperature of 140-180°C.

[0071] In the present invention, the thermosetting resin prepolymer is pre-cured to make the overall temperature of the sponge uniform, the thermosetting resin inside reaches a gel state, and is attached to the three-dimensional porous polymer matrix skeleton. The vacuum condition is conducive to the gas discharge in the thermosetting resin in the gel state, and better combined with the sponge skeleton. Then, the solution containing the thermosetting resin prepolymer and the curing agent is dispersed on the three-dimensional porous polymer matrix containing the gel-state thermosetting resin, and cured to obtain the oil-absorbing sponge, which is conducive to the uniform distribution of the thermosetting resin on the sponge skeleton, thereby maintaining the elasticity of the three-dimensional porous polymer matrix, improving the recyclable performance of the oil-absorbing sponge, and the adsorption capacity is basically not attenuated when it is recycled for 30 times.

[0072] According to a preferred embodiment of the present invention, in step (1), the gel-state thermosetting resin accounts for % of the total mass of the sponge. 0.5 -1%, which is beneficial to further maintain the elasticity of the three-dimensional porous polymer matrix and improve the recycling performance of the oil-absorbing sponge.

[0073] In the present invention, in step (1), there is no special requirement for the pre-curing time, which can be reasonably adjusted according to actual needs, as long as the thermosetting resin prepolymer forms a gel-state thermosetting resin in the three-dimensional porous polymer matrix. According to a preferred embodiment of the present invention, the pre-curing time is 40-90 minutes.

[0074] In the present invention, in step (2), the curing time is 20-100 minutes.

[0075] According to a preferred embodiment of the present invention, in the solution containing the thermosetting resin prepolymer and the curing agent, the mass concentration of the thermosetting resin prepolymer is 0.02 to 0.6 g / mL, preferably 0.03 to 0.5 g / mL, and more preferably 0.05 to 0.3 g / mL.

[0076] According to a preferred embodiment of the present invention, in the solution containing the thermosetting resin prepolymer and the curing agent, the mass of the curing agent accounts for 1 to 10% of the mass of the thermosetting resin prepolymer; preferably 5 to 10%.

[0077] In the present invention, in the solution containing thermosetting resin prepolymer and curing agent, the optional range of solvent is relatively wide, as long as it can dissolve the thermosetting resin prepolymer and the curing agent. According to a preferred embodiment of the present invention, in the solution containing thermosetting resin prepolymer and curing agent, the solvent is selected from at least one of water, C1-C4 alcohol and C1-C4 ketone; preferably ethanol and / or acetone.

[0078] In the present invention, in the solution containing the thermosetting resin prepolymer and the curing agent, the curing agent has a wide range of options, as long as it can form the thermosetting resin with the thermosetting resin prepolymer. According to a preferred embodiment of the present invention, the curing agent is selected from at least one of organic acids, acid anhydrides, boron trifluoride, aliphatic polyamines and aromatic polyamines; preferably at least one of benzenesulfonic acid, hexamethylenetetramine and meta-phenylenediamine.

[0079] A second aspect of the present invention provides an application of the surface oil intercepting device of the present invention in the management of floating oil on the surface of the water.

[0080] The present invention will be described in detail below through examples.

[0081] In the following examples, the vertical burning test grade is tested according to the UL94 flame retardant test method.

[0082] In the following test examples, the tests of saturated oil phase adsorption and saturated oil phase adsorption after 30 cycles are performed using the following steps: weigh the mass m1 of the sponge to be tested and place it in a beaker filled with 200 mL of toluene; weigh the mass m2 of the sponge after saturation; saturated oil phase adsorption (Ф): Ф=m1 / m2; the test of saturated oil phase adsorption after 30 cycles is to first saturate the sponge with toluene and mechanically squeeze it until no oil phase drips naturally, repeating this process 30 times; the subsequent test steps are the same as those for saturated oil phase adsorption.

[0083] In the following embodiments, the water contact angle parameters were measured using the EASY DROP contact angle tester from KRUSS, Germany, with a measurement range of 1-180° and a resolution of ±0.1°. A static contact angle measurement mode was used, and a water droplet or white oil droplet with a fixed volume of 2 μL was dropped on the sponge each time. The calculated initial contact angle was taken as the contact angle measurement value of the sponge surface. Six parallel measurements were performed to calculate the average value.

[0084] In the following examples, the oil interception experiment process is as follows: sewage containing 1wt% floating oil (Great Wall lubricating oil) is passed through the oil interception member at the same flow rate, and the time when the oil content in the water reaches 0.2wt% after passing through the oil interception member is recorded as the effective oil interception time.

[0085] In the following embodiments, the effective time of oil blocking after 30 cycles is tested as follows: the oil blocking member is placed in a sufficient amount of lubricating oil for adsorption saturation, the lubricating oil in the sponge is desorbed by mechanical squeezing, and the above process is repeated 30 times to obtain the squeezed sponge for testing the effective time of oil blocking.

[0086] In the following examples, the porous melamine-formaldehyde sponge matrix (Xuxian Industrial) had a porosity of 95% and an average pore size of 100 μm;

[0087] The porous melamine-formaldehyde sponge matrix (Beiyou Building Materials) has a porosity of 96% and an average pore size of 250 μm.

[0088] Preparation Example 1

[0089] (1) Weigh 10 g of phenolic resin prepolymer solution (plasticized by Meisheng Chemical) and 1 g of hexamethylenetetramine and dissolve them in 200 mL of ethanol. Stir thoroughly to make the solution clear and transparent.

[0090] (2) A 200*200*150 mm porous melamine-formaldehyde sponge matrix (Xuxian Industrial) was measured and the above solution was dispersed into the sponge by extrusion dispersion so that the curing agent solution evenly infiltrated the sponge. The extruded sponge was placed in a vacuum oven at 180°C and 3 kPa for curing for 20 min to obtain an oil-absorbing sponge S1.

[0091] In the oil-absorbing sponge S1, the mass of phenolic resin accounts for 2% of the total mass of the oil-absorbing sponge; the average pore size of the oil-absorbing sponge S1 is 100 μm, the porosity is 95%, the open porosity is 98%, the vertical combustion grade is V-0, the contact angle to white oil is 0°, and the contact angle to water is 152.3°; the saturated oil phase adsorption amount is 40 g / g; the saturated oil phase adsorption amount after 30 cycles is 38 g / g.

[0092] The sponge was tested for saturated oil phase adsorption, oil phase removal rate and oil phase selective adsorption rate after 30 cycles according to the test requirements. The results are shown in Table 1.

[0093] Among them, the SEM image of the oil absorbing sponge S1 is as follows Figure 2 As shown, compared with the melamine-formaldehyde sponge matrix (SEM image as Figure 4 ), the porous skeleton size of the oil-absorbing sponge is slightly larger than that before modification, indicating that the phenolic resin is uniformly solidified on the surface of the porous melamine-formaldehyde sponge matrix skeleton and has through holes, which makes the oil-absorbing sponge highly selective for oil products in oily wastewater and has a large adsorption capacity for oil products.

[0094] Figure 3 The SEM image of the oil-absorbing sponge S1 after 30 cycles. Figure 2 Compared with the above, there is basically no change, so the adsorption capacity of the oil-absorbing sponge has basically not declined when it is recycled 30 times.

[0095] Preparation Example 2

[0096] (1) Weigh 10 g of phenolic resin prepolymer solution (plasticized by Meisheng Chemical), 0.3 g of hexamethylenetetramine and 0.2 g of m-xylylenediamine and dissolve them in 200 mL of ethanol. Stir thoroughly to make the solution clear and transparent.

[0097] (2) Weigh a 200*200*150 mm porous melamine-formaldehyde sponge matrix (Xuxian Industrial), and disperse the above solution into the sponge by extrusion dispersion so that the curing agent solution evenly infiltrates the sponge. Place the sponge after extrusion in a 140° C. vacuum oven for curing for 100 min to obtain an oil-absorbing sponge S2.

[0098] In the oil-absorbing sponge S2, the mass of phenolic resin accounts for 3% of the total mass of the sponge; the average pore size of the oil-absorbing sponge S2 is 100 μm, the porosity is 95%, and the open porosity is 98%; the vertical combustion grade is V-1, the contact angle to white oil is 0°, and the contact angle to water is 153.2°; the saturated adsorption capacity is 38 g / g; the saturated oil phase adsorption capacity after 30 cycles is 37 g / g.

[0099] The sponge was tested for saturated oil phase adsorption, oil phase removal rate and oil phase selective adsorption rate after 30 cycles according to the test requirements. The results are shown in Table 1.

[0100] Preparation Example 3

[0101] (1) Weigh 10 g of epoxy resin prepolymer solution (Willigut) and 0.6 g of hexamethylenetetramine and dissolve them in 200 mL of acetone. Stir thoroughly to make the solution clear and transparent.

[0102] (2) Weigh a 200*200*150 mm porous melamine-formaldehyde sponge matrix (Beyou Building Materials), and disperse the above solution into the sponge by spraying so that the curing agent solution evenly infiltrates the sponge. Place the extruded sponge in a vacuum oven at 150°C and 5 kPa for curing for 20 min to obtain an oil-absorbing sponge S3.

[0103] In the oil-absorbing sponge S3, the mass of epoxy resin accounts for 3% of the total mass of the sponge; the average pore size of the oil-absorbing sponge S3 is 250 μm, the porosity is 96%, and the open porosity is 98%; the vertical combustion grade is V-0; the contact angle to white oil is 0°, and the contact angle to water is 151.1°; the saturated adsorption capacity is 40 g / g; the saturated oil phase adsorption capacity after 30 cycles is 35 g / g.

[0104] The sponge was tested for saturated oil phase adsorption, oil phase removal rate and oil phase selective adsorption rate after 30 cycles according to the test requirements. The results are shown in Table 1.

[0105] Preparation Example 4

[0106] The method of Preparation Example 3 was followed, except that the volume of the porous melamine-formaldehyde sponge matrix was 400*400*150 mm; the other conditions were the same as Preparation Example 3, to obtain oil-absorbing sponge S4.

[0107] In the oil-absorbing sponge S4, the mass of epoxy resin accounts for 0.5% of the total mass of the sponge; the average pore size of the oil-absorbing sponge S4 is 250 μm, the porosity is 92%, and the open porosity is 93%; the vertical combustion grade is V-0; the contact angle to white oil is 0°, and the contact angle to water is 146°; the saturated adsorption capacity is 37 g / g; the saturated oil phase adsorption capacity after 30 cycles is 33 g / g.

[0108] The sponge was tested for saturated oil phase adsorption, oil phase removal rate and oil phase selective adsorption rate after 30 cycles according to the test requirements. The results are shown in Table 1.

[0109] Preparation Example 5

[0110] The method of Preparation Example 3 was followed, except that 20 g of epoxy resin prepolymer solution (Willigut) and 1.2 g of hexamethylenetetramine were weighed and dissolved in 200 mL of acetone; the other conditions were the same as those of Preparation Example 3 to obtain oil-absorbing sponge S5.

[0111] In the oil-absorbing sponge S5, the mass of epoxy resin accounts for 5% of the total mass of the sponge; the average pore size of the oil-absorbing sponge S5 is 240 μm, the porosity is 87%, and the open porosity is 83%; the vertical combustion grade is V-1; the contact angle to white oil is 0°, and the contact angle to water is 155.4°; the saturated adsorption capacity is 32 g / g; the saturated oil phase adsorption capacity after 30 cycles is 30 g / g.

[0112] The sponge was tested for saturated oil phase adsorption, oil phase removal rate and oil phase selective adsorption rate after 30 cycles according to the test requirements. The results are shown in Table 1.

[0113] Preparation Example 6

[0114] (1) Weigh 10 g of phenolic resin prepolymer solution (plasticized by Meisheng Chemical) and 1 g of hexamethylenetetramine and dissolve them in 200 mL of ethanol. Stir thoroughly to make the solution clear and transparent.

[0115] (2) taking a 200*200*150 mm porous melamine-formaldehyde sponge matrix (Xuxian Industrial), dispersing the above solution into the sponge by extrusion dispersion, so that the curing agent solution evenly infiltrates the sponge, and curing the sponge after extrusion in a vacuum oven at 110° C. and 3 kPa for 80 min to obtain a sponge containing a gel-state phenolic resin; wherein the gel-state phenolic resin sponge accounts for 1% of the total mass of the porous melamine-formaldehyde sponge matrix;

[0116] (3) The solution of step (1) is dispersed into the sponge containing the gel-like phenolic resin obtained in step (2) by extrusion dispersion, so that the solution evenly infiltrates the sponge. The extruded sponge is placed in a vacuum oven at 180° C. and 3 kPa for curing for 20 min to obtain an oil-absorbing sponge S6.

[0117] The phenolic resin accounts for 2% of the total mass of the oil-absorbing sponge S6; the average pore size of the oil-absorbing sponge is 100 μm, the porosity is 95%, the open porosity is 98%, the vertical combustion grade is V-0, the contact angle to white oil is 0°, and the contact angle to water is 153.8°; the saturated oil phase adsorption amount is 44 g / g; the saturated oil phase adsorption amount after 30 cycles is 43 g / g.

[0118] Preparation Example 7

[0119] (1) Weigh 10 g of phenolic resin prepolymer solution (plasticized by Meisheng Chemical) and 1 g of hexamethylenetetramine and dissolve them in 200 mL of ethanol. Stir thoroughly to make the solution clear and transparent.

[0120] (2) A 200*200*150 mm porous melamine-formaldehyde sponge matrix (Xuxian Industrial) was measured and the above solution was dispersed into the sponge by extrusion dispersion so that the curing agent solution evenly infiltrated the sponge. The sponge after extrusion was placed in a vacuum oven at 110° C. and 3 kPa for curing for 80 min to obtain a sponge containing gel phenolic resin; the pre-cured sponge was then placed in a vacuum oven at 180° C. and 3 kPa for curing for 20 min to obtain an oil-absorbing sponge S7.

[0121] In the oil-absorbing sponge S7, the mass of phenolic resin accounts for 2% of the total mass of the oil-absorbing sponge; the average pore size of the oil-absorbing sponge S8 is 100 μm, the porosity is 95%, the open porosity is 98%, the vertical combustion grade is V-0, the contact angle to white oil is 0°, and the contact angle to water is 152.7°; the saturated oil phase adsorption amount is 41 g / g; the saturated oil phase adsorption amount after 30 cycles is 40 g / g.

[0122] Preparation Example 8

[0123] The method of Preparation Example 1 was followed, except that the impregnation amount of the phenolic resin prepolymer was adjusted so that the mass of the epoxy resin accounted for 7% of the total mass of the oil-absorbing sponge. The remaining conditions were the same as those of Preparation Example 1, to obtain oil-absorbing sponge D1.

[0124] In the oil-absorbing sponge D1, the mass of phenolic resin accounts for 7% of the total mass of the sponge; the average pore size of the oil-absorbing sponge D1 is 230 μm, the porosity is 73%, and the open porosity is 69%; the vertical combustion grade is V-2; the contact angle to white oil is 0°, and the contact angle to water is 158.1°; the saturated adsorption capacity is 27 g / g; the saturated oil phase adsorption capacity after 30 cycles is 20 g / g.

[0125] Figure 5 is the SEM photo of sponge D1. Compared with oil-absorbing sponge S1 ( Figure 2), the skeleton and the joints of the sponge are obviously covered with more phenolic resin, which reduces the porosity of the sponge and the corresponding saturated adsorption capacity. In addition, the phenolic resin is unevenly distributed on the surface of the skeleton, which is prone to stress concentration during the cyclic use process, resulting in skeleton collapse. Figure 6 This is a photo of the skeleton of sponge D1 after being recycled 30 times. The stacking density of the skeleton has increased significantly, resulting in a decrease in the saturated adsorption capacity.

[0126] The sponge was tested for saturated oil phase adsorption, oil phase removal rate and oil phase selective adsorption rate after 30 cycles according to the test requirements. The results are shown in Table 1.

[0127] Preparation Example 9

[0128] The method of Preparation Example 1 is followed, except that in step (2), curing is carried out under normal pressure, specifically: the sponge after extrusion is placed in an oven at 180° C. for curing for 20 minutes, and the other conditions are the same as those of Preparation Example 1, to obtain oil-absorbing sponge D2.

[0129] In the oil-absorbing sponge D2, the mass of phenolic resin accounts for 0.2% of the total mass of the sponge; the average pore size of the oil-absorbing sponge D2 is 250 μm, the porosity is 96%, and the open porosity is 98%; the vertical combustion grade is V-0; the contact angle to white oil is 0°, and the contact angle to water is 133.1°; the saturated adsorption capacity is 30 g / g; the saturated oil phase adsorption capacity after 30 cycles is 20 g / g.

[0130] The sponge was tested for saturated oil phase adsorption, oil phase removal rate and oil phase selective adsorption rate after 30 cycles according to the test requirements. The results are shown in Table 1.

[0131] Examples 1-7 and Comparative Examples 1-2

[0132] The oil intercepting adsorbent materials prepared in Preparation Examples 1-7 and Preparation Examples 8-9 were respectively prepared into oil intercepting ropes of required lengths, assembled into oil intercepting devices, and then oil intercepting experiments were carried out. The results are shown in Table 1.

[0133] Comparative Example 3

[0134] The unmodified oil intercepting adsorbent material D3 was prepared into an oil intercepting rope of the required length, assembled into an oil intercepting device, and then an oil intercepting experiment was carried out. The results are shown in Table 1.

[0135] Comparative Example 4

[0136] The oil intercepting material D4 on the market which has no oil absorption function was prepared into an oil intercepting rope of the required length, assembled into an oil intercepting device, and then an oil intercepting experiment was carried out. The results are shown in Table 1.

[0137] Table 1

[0138]

[0139] It can be seen from the results in Table 1 that the surface oil interception material and the surface oil interception device of the present invention have a good surface oil interception efficiency and can prevent oil leakage, oil overflow and the like from occurring to the greatest extent.

[0140] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A surface oil interception device, characterized in that: The device comprises: at least two fixed blocks and an oil blocking assembly arranged between the fixed blocks; The oil blocking assembly comprises an oil blocking member and at least two groups of floating blocks arranged on both sides of the oil blocking member; The fixed block is provided with a slide groove, which is used to restrict the floating block in the slide groove, and the floating block is configured to be able to rise and fall in the slide groove; The oil-blocking material includes an oil-absorbing sponge, which includes a three-dimensional porous polymer matrix and a thermosetting resin coated on the three-dimensional porous polymer matrix; the saturated adsorption capacity of the oil-absorbing sponge for oil products is not less than 30g / g; the saturated adsorption capacity of the oil-absorbing sponge for oil products is still not less than 30g / g after 30 adsorption-desorption cycles.

2. The surface oil interception device according to claim 1, wherein: The shape of the slide groove is set to be arc-shaped; and / or The oil retaining member is configured to be columnar in shape; and / or The floating block is shaped as a sphere; and / or The material of the floating block is selected from at least one of foamed polymer materials, preferably at least one of foamed polypropylene, foamed polystyrene and foamed polyvinyl chloride.

3. The surface oil interception device according to claim 1 or 2, wherein: The roughness Ra value of the outer surface of the floating block is less than 3.2; The surface roughness Ra value of the slide groove is less than 3.

2.

4. The surface oil interception device according to claim 1 or 2, wherein: The mass of the thermosetting resin accounts for 0.5-5% of the total mass of the sponge; preferably 2-3%; and / or The saturated adsorption capacity of the oil-absorbing sponge for oil products is 30-50 g / g; the saturated adsorption capacity of the oil-absorbing sponge for oil products is still 30-50 g / g after being used in a desorption-adsorption cycle for 30 times.

5. The surface oil intercepting device according to claim 1 or 2, wherein: The thermosetting resin is selected from at least one of phenolic resin, epoxy resin, urea-formaldehyde resin, unsaturated polyester resin and silicone resin; preferably selected from at least one of phenolic resin, epoxy resin and silicone resin; and / or The three-dimensional porous polymer matrix is ​​selected from at least one of melamine-formaldehyde sponge, polyurethane sponge and ethylene-vinyl acetate sponge, preferably melamine-formaldehyde sponge.

6. The surface oil interception device according to claim 1 or 2, wherein: The pore size of the oil absorbing sponge is 10-500 μm; and / or The porosity of the oil-absorbing sponge is greater than or equal to 60%.

7. The surface oil interception device according to claim 1 or 2, wherein: The static plane contact angle of the surface of the oil-absorbing sponge to water in air is greater than 135°; and / or The static contact angle of the oil-absorbing sponge surface to white oil is less than 30°; and / or The UL94 vertical burning test grade of the oil absorbing sponge is above V-2.

8. The surface oil interception device according to claim 1 or 2, wherein: The preparation method of the oil absorbing sponge comprises: The solution containing thermosetting resin prepolymer and curing agent is dispersed into a three-dimensional porous polymer matrix, and cured under vacuum conditions to obtain the oil-absorbing sponge; the vacuum conditions include: a pressure of 0-10 kPa.

9. The surface oil interception device according to claim 8, wherein: The preparation method of the oil absorbing sponge comprises: (1) dispersing a solution containing a thermosetting resin prepolymer and a curing agent into a three-dimensional porous polymer matrix, and pre-curing under a first vacuum condition; (2) dispersing a solution containing a thermosetting resin prepolymer and a curing agent into the product obtained in step (1), and curing the product under a second vacuum condition; The first vacuum condition and the second vacuum condition each include: a pressure of 0-10 kPa; Pre-curing conditions include: temperature of 80-120°C; Curing conditions include: temperature of 140-180°C.

10. The surface oil intercepting device according to claim 1 or 2, wherein: The material containing the oil-absorbing sponge is formed into the oil-blocking member by melt splicing and / or bonding, preferably melt splicing.

11. Application of the surface oil intercepting device described in any one of claims 1 to 0 in the treatment of floating oil on the surface.

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