CARBON NANOFIBER COMPOSITE WATER PURIFICATION MATERIAL, PREPARATION METHOD THEREOF, AND APPLICATION THEREOF

Abstract

The present invention involves a carbon nanofiber composite water purification material. The carbon nanofiber composite water purification material is prepared by the following components in parts by weight: 70-80 parts of activated carbon cellulose, 6-10 parts of lemon powder, 6-10 parts of Jew's ear powder, and 1-2 parts of graphene oxide. The present invention also involves a filter cartridge. The filter cartridge includes a filter cartridge body comprising a plastic skeleton and a flat membrane which coats an outer surface of the plastic skeleton; the plastic skeleton is provided with a plurality of water passage holes; the carbon nanofiber composite water purification material is provided on an outer surface of the flat membrane. The carbon nanofiber composite waste purification material of the present invention has high nano-porosity, strong adsorption abilities, and a long lifetime.

Claims

1. A filter cartridge, wherein it includes a filter cartridge body, the filter cartridge body comprises a plastic skeleton and a flat membrane which coats an outer surface of the plastic skeleton; the plastic skeleton is provided with a plurality of water passage holes; a carbon nanofiber composite water purification material is provided on an outer surface of the flat membrane, the carbon nanofiber composite water purification material is prepared by the following components in parts by weight: 70-80 parts of activated carbon cellulose, 6-10 parts of lemon powder, 6-10 parts of Jew's ear powder, and 1-2 parts of graphene oxide.

2. The filter cartridge according to claim 1, wherein the carbon nanofiber composite water purification material binds to the outer surface of the flat membrane by wet centrifugal molding.

3. The filter cartridge according to claim 1, wherein a nonwoven fabric which coats the filter cartridge is provided.

4. The filter cartridge according to claim 1, wherein the plastic skeleton is cylindrically-shaped; the flat membrane is ring-shaped; the flat membrane is coated on the plastic skeleton by welding; the flat membrane has a diameter of 0.1-0.3 m.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The sole FIGURE is a schematic diagram showing the wet centrifugal molding device in embodiment 1.

REFERENCE NUMERALS

[0037] 10vacuuming device; 20molding chamber; 30positioning frame; 40filter cartridge body.

DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS

[0038] The present invention is further described in combination with the illustrated embodiments below. It should be noted that a new embodiment may be obtained by a combination of the embodiments or any of the technical features described below, provided that the technical features do not contradict with each other.

[0039] A carbon nanofiber composite water purification material, which is prepared by the following components in parts by weight: 70-80 parts of activated carbon cellulose, 6-10 parts of lemon powder, 6-10 parts of Jew's ear (Auricularia auricula-judae) powder, and 1-2 parts of graphene oxide.

[0040] A preparation method of the carbon nanofiber composite water purification material, comprising the following steps:

[0041] Step Acrushing and sieving: grinding activated carbon cellulose, lemon powder, Jew's ear powder, and graphene oxide respectively; sieving the ground substances through a 100-200 mesh filter respectively; and

[0042] Step Bmixing: mixing a predetermined amount of the activated carbon cellulose, lemon powder, Jew's ear powder, and graphene oxide from the previous step to obtain the carbon nanofiber composite water purification material.

[0043] A filter cartridge, which includes a filter cartridge body, the filter cartridge body comprises a plastic skeleton and a flat membrane which coats an outer surface of the plastic skeleton; the plastic skeleton is provided with a plurality of water passage holes; the carbon nanofiber composite water purification material according to the present invention is provided on an outer surface of the flat membrane.

[0044] As a further embodiment of the present invention, the carbon nanofiber composite water purification material binds to the outer surface of the flat membrane by wet centrifugal molding.

[0045] The carbon nanofiber composite water purifying material of the present invention does not comprise a binding agent. It is well known that the main function of the binding agent is to bind together materials of different properties; however, the adhesive may also disperse to the holes of carbon fiber materials, blocking these holes. This seriously affects the filtration ability of carbon fiber filters. The invention adopts wet centrifugal molding and hence does not require a binding agent.

[0046] As a further embodiment of the present invention, a nonwoven fabric which coats the filter cartridge is provided.

[0047] As a further embodiment of the present invention, the plastic skeleton is cylindrically-shaped; the flat membrane is ring-shaped; the flat membrane is coated on the plastic skeleton by welding; the flat membrane has a diameter of 0.1-0.3 m.

[0048] A method of manufacturing a filter cartridge, comprising the following steps:

[0049] Step Islurry preparation: mixing the carbon nanofiber composite water purification material with water thoroughly to obtain a slurry; the amount of the water added is 60% of the total weight of the carbon nanofiber composite water purification material.

[0050] Step IIfilter cartridge body preparation: providing a plastic skeleton and a flat membrane, coating the flat membrane on the outer surface of the plastic skeleton to obtain the filter cartridge body; the filter cartridge body is mainly used for shaping the filter cartridge, its inner hole forms a water channel. When drying the filter cartridge, an inner lining is provided to prevent deformation of the filter cartridge.

[0051] Step IIIwet centrifugal molding: providing a wet centrifugal molding device, which comprises a vacuuming device, a molding chamber, a positioning frame provided in the molding chamber; the positioning frame is provided with a rotating device; communicating the vacuum port of the vacuuming device with the inner chamber of the molding chamber via a pipe; installing the filter cartridge body on the rotating device; pumping the slurry into the molding chamber via the vacuuming device, and centrifuging the filter cartridge body at a high speed by the rotating device simultaneously. Under the dual action of vacuum adsorption and centrifugation, the slurry uniformly binds to the outer surface of the flat membrane of the filter cartridge body to obtain a semifinished filter cartridge.

[0052] Step IVwater removal: centrifuging and drying the semifinished filter cartridge obtained in step III sequentially to completely remove the water in the semifinished filter cartridge and to obtain the filter cartridge. Centrifugation is carried out first, which allows the subsequent drying process to be shortened; this greatly increases efficiency, productivity, and reduces energy consumption.

[0053] As a further embodiment of the present invention, after step IV is completed, it is also required to coat a nonwoven fabric on the outer surface of the filter cartridge. The non-woven fabric acts to prevent the occurrence of black water when using the filter cartridge.

[0054] As a further embodiment of the present invention, in step III, the rotating device operates at a rotational speed of 5000 rpm for 30-90 seconds.

[0055] As a further embodiment of the present invention, in step IV, centrifugation is carried out at a speed of 500 rpm for 20-50 seconds; drying is carried out at a temperature of 105-120 C. for 4-6 hours.

[0056] Below are specific examples of the present invention. The raw materials, equipment, and the like employed in the following examples can be obtained commercially unless otherwise specified.

Embodiment 1

[0057] A carbon nanofiber composite water purification material, which is prepared by the following components in parts by weight: 75 parts of activated carbon cellulose, 8 parts of lemon powder, 8 parts of Jew's ear powder, and 1.5 parts of graphene oxide.

[0058] The preparation method of the carbon nanofiber composite water purification material comprises the following steps:

[0059] Step Acrushing and sieving: grinding activated carbon cellulose, lemon powder, Jew's ear powder, and graphene oxide respectively; sieving the ground substances through a 150 mesh filter respectively; and

[0060] Step Bmixing: according to the amount specified above, mixing the of the activated carbon cellulose, lemon powder, Jew's ear powder, and graphene oxide from the previous step to obtain the carbon nanofiber composite water purification material.

[0061] A method of manufacturing a filter cartridge, comprising the following steps:

[0062] Step Islurry preparation: mixing the carbon nanofiber composite water purification material with water thoroughly to obtain a slurry; the amount of the water added is 60% of the total weight of the carbon nanofiber composite water purification material.

[0063] Step IIfilter cartridge body preparation: providing a plastic skeleton and a flat membrane, coating the flat membrane on the outer surface of the plastic skeleton to obtain the filter cartridge body; the filter cartridge body is mainly used for shaping the filter cartridge, its inner hole forms a water channel. When drying the filter cartridge, an inner lining is provided to prevent deformation of the filter cartridge.

[0064] Step IIIwet centrifugal molding: providing a wet centrifugal molding device (see the FIGURE), which comprises a vacuuming device 10, a molding chamber 20, a positioning frame 30 provided in the molding chamber 20; the positioning frame 30 is provided with a rotating device; communicating the vacuum port of the vacuuming device with the inner chamber of the molding chamber via a pipe; mounting the filter cartridge body 40 on the rotating device; pumping the slurry into the molding chamber via the vacuuming device, the rotating device also drives the high-speed centrifugation of the filter cartridge body. Under the dual action of vacuum adsorption and centrifugation, the slurry uniformly binds to the outer surface of the flat membrane of the filter cartridge body to obtain a semifinished filter cartridge. The rotating device operates at a rotational speed of 5000 rpm for 60 seconds.

[0065] Step IVwater removal: centrifuging and drying the semifinished filter cartridge obtained in step III sequentially to completely remove the water in the semifinished filter cartridge in order to obtain the filter cartridge. Centrifugation is carried out at a speed is 500 rpm for 20-50 seconds; drying is carried out at a temperature of 110 C. for 5 hours.

[0066] After step IV is completed, it is also required to coat a nonwoven fabric on the outer surface of the filter cartridge.

Embodiment 2

[0067] A carbon nanofiber composite water purification material, which is prepared by the following components in parts by weight: 78 parts of activated carbon cellulose, 7 parts of lemon powder, 9 parts of Jew's ear powder, and 1 part of graphene oxide.

[0068] The rest is the same as embodiment 1.

Embodiment 3

[0069] A carbon nanofiber composite water purification material, which is prepared by the following components in parts by weight: 70 parts of activated carbon cellulose, 6 parts of lemon powder, 6 parts of Jew's ear powder, and 1 part of graphene oxide.

[0070] The rest is the same as embodiment 1.

Embodiment 4

[0071] A carbon nanofiber composite water purification material, which is prepared by the following components in parts by weight: 80 parts of activated carbon cellulose, 10 parts of lemon powder, 10 parts of Jew's ear powder, and 2 parts of graphene oxide.

[0072] The rest is the same as embodiment 1.

Tests

[0073] Iodine and Methylene Blue Adsorption Measurement:

[0074] Iodine and methylene blue solutions are respectively added dropwise to 1 g of the carbon nanofiber composite water purification material. The mixtures obtained are stirred until the color disappears. At this point, the carbon nanofiber composite materials are saturated and unable to continue adsorbing iodine and methylene blue. The titration values are recorded, which correspond to adsorption values.

[0075] Residual Chlorine Adsorption Lifetime Test:

[0076] The filter cartridge made from the carbon nanofiber composite water purification material is connected to the water outlet pipe of a labeled water tank. Residual chlorine in the labeled water tank is maintained at a concentration of 1 mg/L. Water from the labeled water tank is filtered through the filter cartridge, and the concentration of residual chlorine in the filtered water is measured. It was found that in 50 tons of filtered water, the residual chlorine removal percentage exceeds 75% (according to the requirement of NSF standards, the residual chlorine removal percentage should be greater than or equal to 50% in an adsorption lifetime test).

[0077] The filter cartridge of embodiments 1-4 were examined via the abovementioned tests, the results are illustrated in Table 1.

TABLE-US-00001 TABLE 1 Specific Adsorption Adsorption Residual surface area of value of value of chlorine nanopores methylene blue iodine removal Embodiment (m.sup.2/g) (mg/g) (mg/g) percentage 1 2105 202 1200 82.6% 2 2060 212 1300 83.2% 3 2030 210 1260 81.8% 4 2100 208 1260 82.7%

[0078] From the results in Table 1, it can be concluded that embodiments 1-4 of the present invention has high nano-porosity, strong adsorption abilities, and long adsorption lifetime.

[0079] The above embodiments are merely the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the scope of the present invention.