CN116676806A - Composite cone and preparation method and application thereof - Google Patents
Composite cone and preparation method and application thereof Download PDFInfo
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- CN116676806A CN116676806A CN202310756933.2A CN202310756933A CN116676806A CN 116676806 A CN116676806 A CN 116676806A CN 202310756933 A CN202310756933 A CN 202310756933A CN 116676806 A CN116676806 A CN 116676806A
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- 239000002131 composite material Substances 0.000 title claims abstract description 70
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 229920001046 Nanocellulose Polymers 0.000 claims abstract description 61
- 229920001661 Chitosan Polymers 0.000 claims abstract description 46
- 239000002335 surface treatment layer Substances 0.000 claims abstract description 25
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 73
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 51
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 51
- 241001330002 Bambuseae Species 0.000 claims description 51
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 51
- 239000011425 bamboo Substances 0.000 claims description 51
- 238000001035 drying Methods 0.000 claims description 39
- 239000007864 aqueous solution Substances 0.000 claims description 38
- 238000004537 pulping Methods 0.000 claims description 37
- 238000001914 filtration Methods 0.000 claims description 19
- 239000000243 solution Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 11
- 238000007731 hot pressing Methods 0.000 claims description 10
- 238000005470 impregnation Methods 0.000 claims description 5
- 241000609240 Ambelania acida Species 0.000 claims description 4
- 239000010905 bagasse Substances 0.000 claims description 4
- 239000010902 straw Substances 0.000 claims description 4
- 240000007594 Oryza sativa Species 0.000 claims description 3
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 238000007865 diluting Methods 0.000 claims description 2
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004381 surface treatment Methods 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 22
- 238000010790 dilution Methods 0.000 description 17
- 239000012895 dilution Substances 0.000 description 17
- 238000003756 stirring Methods 0.000 description 17
- 238000005303 weighing Methods 0.000 description 17
- 239000000835 fiber Substances 0.000 description 14
- 238000010009 beating Methods 0.000 description 8
- 239000012752 auxiliary agent Substances 0.000 description 6
- 125000002091 cationic group Chemical group 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 5
- 239000003208 petroleum Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011121 hardwood Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000747 poly(lactic acid) Polymers 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
- D21H11/18—Highly hydrated, swollen or fibrillatable fibres
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Paper (AREA)
Abstract
The invention provides a composite cone, a preparation method and application thereof, wherein the composite cone comprises a cone blank and a surface treatment layer coated on the surface of the cone blank; the paper cone blank is prepared from non-wood pulp, and the surface treatment layer comprises nanocellulose and chitosan; 100% of non-wood pulp is used as a raw material for preparing the cone blank, and the surface of the cone blank is coated with nano cellulose and chitosan in a surface treatment mode, so that the obtained composite cone has higher modulus, the preparation process is simple, mass production can be realized, the use of wood pulp is avoided, the production cost is reduced, and the carbon emission is reduced.
Description
Technical Field
The invention belongs to the technical field of speakers, and particularly relates to a composite cone and a preparation method and application thereof.
Background
The main component of the sound production of a loudspeaker is a diaphragm, and the performance of the diaphragm depends on the geometry of the diaphragm, the material of the diaphragm and the processing technology of the diaphragm. Cone is the most used and common diaphragm material, which has proper internal damping characteristics, low density and high strength, and is the target for high-quality cone.
At present, pulp for manufacturing the cone is generally prepared from mixed pulp such as wood pulp, cotton pulp, wool pulp and the like as base pulp, and reinforcing fibers are added into the base pulp, for example: carbon fiber, mineral fiber, bulletproof fiber, etc. are matched with other functional auxiliary agents to meet the performance requirements. Under the environment-friendly pursuit, fully utilizing non-wood forest resources plays an important role in guaranteeing wood safety, low-carbon green development, improving civilian life and the like. Bamboo is used as gramineous plant, the fiber form and cellulose content quality of the bamboo are between that of softwood and hardwood, the produced bamboo pulp variety can be compared with wood pulp, the length of the bamboo pulp fiber is longer than that of hardwood, the microstructure of the cell wall is special, the pulping strength ductility is good, the bleached pulp is endowed with good optical characteristics, and meanwhile, the cellulose content of the bamboo is high, so that the bamboo pulp is an excellent fiber raw material for papermaking. The cell composition of the bamboo pulp is complex, and besides fibrous cells with different lengths, a large number of non-fibrous cells exist, and the non-fibrous cells are various in shape, are in rod shape, spherical shape and the like, and have low strength when being singly used as raw materials for manufacturing the paper cone, so that the use requirement cannot be met. Therefore, in cone materials, bamboo pulp is generally added as an auxiliary pulp to meet performance requirements.
CN101280530a discloses a method for preparing drum paper, which comprises two steps of beating and hot press forming, wherein 10-20 kg of bamboo fiber with the thickness of 3-6 mm and 500-1500 kg of water are beaten in a beating machine for 8-12 h, and the hot press forming keeps the beaten bamboo pulp at the temperature of 150-200 ℃ under the pressure of 100-600 kg for 20-40 s. However, the method for preparing the drum paper needs to pulp the bamboo fiber for 8-12 hours, and is long in time and high in energy consumption.
CN101213870a discloses a loudspeaker diaphragm, which uses a material in which the beating degree of bamboo fibers is reduced to a microfibrillated state for papermaking, and blends more than 40% of the bamboo fibers with the beating degree larger than that of the microfibrillated state for improving performance, and is further added with additives such as polylactic acid, raw rubber, polyvinyl alcohol and the like. However, the bamboo pulp fiber used in the invention has higher beating degree, the bamboo fiber process of blending different beating degrees is complex, and meanwhile, some petroleum-based auxiliary agents are used, so that the invention is not environment-friendly.
In summary, it can be seen that the cone prepared from non-wood pulp as the slurry in the prior art is difficult to meet the requirement of high modulus, and generally the beating degree is selectively increased, or some reinforcing aids (most of petroleum-based aids) are added to improve the cone performance, the increase of beating degree can result in high energy consumption and increased carbon emission, and at the same time, the addition of some petroleum-based aids can consume fossil energy.
Therefore, developing a composite cone with high modulus and using non-wood pulp as a preparation raw material is a technical problem which needs to be solved in the field.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a composite cone, a preparation method and application thereof, wherein the surface of a cone blank is coated with a surface treatment layer, the cone blank is limited to be prepared from non-wood pulp, and the surface treatment layer is made of nanocellulose and chitosan, so that the obtained composite cone has higher modulus and strength, and can effectively improve the performance of a loudspeaker when being applied to the loudspeaker.
To achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a composite cone, which comprises a cone blank, wherein the surface of the cone blank is coated with a surface treatment layer;
the paper cone blank is prepared from non-wood pulp;
the material of the surface treatment layer comprises nanocellulose and chitosan.
The composite cone comprises a cone blank, wherein the surface of the cone blank is coated with a surface treatment layer, the cone blank is prepared from non-wood pulp, and the surface treatment layer comprises nanocellulose and chitosan. Firstly, the paper cone blank is prepared from non-wood pulp serving as a preparation raw material, 100% of non-wood pulp serving as a basic slurry is prepared into the paper cone blank, and the paper cone blank is matched with a surface treatment layer formed by biomass-based auxiliary agents (nano cellulose and chitosan), so that the use of wood pulp and petroleum-based auxiliary agents is avoided, the cost is reduced, and the carbon emission is effectively reduced; the invention also discloses a method for preparing the paper cone blank, which comprises the steps of coating the surface of the paper cone blank with nanocellulose and chitosan, wherein the nanocellulose is coated on the surface of the paper cone blank in a surface treatment mode, compared with the mode of adding the nanocellulose in the pulp, the method can reduce the use of the nanocellulose, and can effectively improve the reinforcing effect.
Preferably, the non-wood pulp comprises any one or a combination of at least two of bamboo pulp, rice straw pulp or bagasse pulp, preferably bamboo pulp.
Preferably, the cone blank is obtained by pulping, diluting, filtering and forming non-wood pulp in sequence and hot-pressing.
Preferably, the freeness of the non-wood pulp is 18-23 ° SR, such as 19 °, 20 °, 21 °, or 22 ° SR, etc.
Preferably, the nanocellulose has a diameter of 5 to 50nm, e.g. 10nm, 15nm, 20nm, 25nm, 30nm, 40nm or 50nm, etc.
Preferably, the nanocellulose has a length of 10 to 1000nm, for example 20nm, 40nm, 60nm, 80nm, 100nm, 200nm, 400nm, 600nm or 800nm, etc.
The nanocellulose provided by the invention is a cellulose substance with at least one dimension at a nanoscale, has low thermal expansion coefficient, high specific surface area, good mechanical property and optical property, and contains a large number of hydroxyl groups on the surface, so that the nanocellulose can be used in a cone to cooperate with chitosan, and a good enhancement effect is shown.
Preferably, the viscosity of the chitosan is 100 to 300pa·s, for example, 120pa·s, 140pa·s, 160pa·s, 180pa·s, 200pa·s, 220pa·s, 240pa·s, 260pa·s, 280pa·s, or the like.
In a second aspect, the present invention provides a method for preparing the composite cone according to the first aspect, the method comprising: immersing the cone blank in a mixed water solution containing nano cellulose and chitosan, taking out and drying to obtain the composite cone.
Preferably, the mixed aqueous solution containing nanocellulose and chitosan is obtained by mixing an aqueous solution containing nanocellulose and an aqueous solution containing chitosan.
Preferably, the mass ratio of the aqueous solution containing nanocellulose and the aqueous solution containing chitosan is 1 (0.5-5), for example 1:1, 1:1.5, 1:2, 1:2.5, 1:3, 1:3.5, 1:4 or 1:4.5, etc., and further preferably 1 (1-4).
Preferably, the mass percentage of nanocellulose in the nanocellulose-containing aqueous solution is 0.25-2%, for example 0.5%, 0.7%, 0.9%, 1.1%, 1.3%, 1.5%, 1.7% or 1.9%, etc.
Preferably, the mass percentage of chitosan in the aqueous solution containing chitosan is 0.5-2%, for example 0.7%, 0.9%, 1.1%, 1.3%, 1.5%, 1.7% or 1.9%, etc.
Preferably, the time of the impregnation is 40 to 80s, for example 45s, 50s, 55s, 60s, 65s, 70s or 75s, etc.
Preferably, the drying temperature is 100 to 120 ℃, for example 107 ℃, 109 ℃, 111 ℃, 113 ℃, 115 ℃, 117 ℃, 119 ℃ or the like.
Preferably, the drying time is 30 to 60 minutes, for example 35 minutes, 40 minutes, 45 minutes, 50 minutes, 55 minutes, or the like.
As a preferable technical scheme of the invention, the preparation method of the composite cone comprises the following steps:
(1) Mixing an aqueous solution of nano cellulose with the mass percentage of 0.25-2% and an aqueous solution of chitosan with the mass percentage of 0.5-2% according to the mass ratio of 1 (0.5-5) to obtain a mixed aqueous solution;
(2) Immersing the cone blank in the mixed aqueous solution obtained in the step (1) for 40-80 s, taking out and drying for 30-60 min at 105-200 ℃ to obtain the composite cone.
In a third aspect, the present invention provides a loudspeaker comprising a composite cone as described in the first aspect.
Compared with the prior art, the invention has the following beneficial effects:
(1) The composite cone comprises a cone blank and a surface treatment layer coated on the surface of the cone blank, wherein the cone blank is prepared from non-wood pulp, and the surface treatment layer comprises nanocellulose and chitosan; by taking 100% of non-wood pulp as basic pulp and adding biomass-based auxiliary agent to match with process conditions, the use of wood pulp and petroleum-based auxiliary agent is avoided, the cost is reduced, and the carbon emission is effectively reduced;
(2) According to the composite cone provided by the invention, the surface of the cone blank is coated with the nanocellulose and the chitosan in a surface treatment mode, and the nanocellulose and the chitosan are utilized to generate a synergistic effect, so that the compatibility is improved, the modulus of the cone is greatly improved, and the performance of a loudspeaker can be effectively improved when the composite cone is applied to the loudspeaker.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
The information of part of raw materials related to the specific embodiment part of the invention is as follows:
cationic styrene-acrylic emulsion: purchased from Guangzhou city rhyme and Qie electroacoustic technology development Co.
Example 1
A composite cone comprises a cone blank and a surface treatment layer coated on the surface of the cone blank;
wherein, the raw material for preparing the paper cone blank is bamboo pulp, and the material of the surface treatment layer comprises nanocellulose and chitosan;
the preparation method of the composite cone provided by the embodiment comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 18 DEG SR, adding water for dilution, stirring and dispersing for 4min at a rotating speed of 1000rpm, adjusting the pulp concentration to 0.1%, filtering water, forming, and finally carrying out hot pressing and drying at 180 ℃ for 1min to obtain a cone blank;
(2) Mixing a nano cellulose water solution with the mass percentage of 1% with a chitosan water solution with the mass percentage of 1% according to the mass ratio of 1:1 to obtain a mixed water solution;
(3) Immersing the cone blank obtained in the step (1) into the mixed aqueous solution obtained in the step (2) for treatment for 50s, and finally drying at 100 ℃ for 40min to obtain the composite cone.
Example 2
A composite cone comprises a cone blank and a surface treatment layer coated on the surface of the cone blank;
wherein, the raw material for preparing the paper cone blank is bamboo pulp, and the material of the surface treatment layer comprises nanocellulose and chitosan;
the preparation method of the composite cone provided by the embodiment comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 20 DEG SR, then adding water for dilution, stirring and dispersing for 6min at a rotating speed of 800rpm, adjusting the pulp concentration to 0.1%, filtering water, forming, and finally carrying out hot press drying at 180 ℃ for 1min to obtain a cone blank;
(2) Mixing a nano cellulose aqueous solution with the mass percentage of 0.5% with a chitosan aqueous solution with the mass percentage of 1% according to the mass ratio of 1:1 to obtain a mixed aqueous solution;
(3) Immersing the cone blank obtained in the step (1) into the mixed aqueous solution obtained in the step (2) for treatment for 40s, and finally drying for 35min at 110 ℃ to obtain the composite cone.
Example 3
A composite cone comprises a cone blank and a surface treatment layer coated on the surface of the cone blank;
wherein, the raw material for preparing the paper cone blank is bamboo pulp, and the material of the surface treatment layer comprises nanocellulose and chitosan;
the preparation method of the composite cone provided by the embodiment comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 23 DEG SR, then adding water for dilution, stirring and dispersing for 3min at a rotating speed of 1200rpm, adjusting the pulp concentration to 0.1%, filtering water, forming, and finally carrying out hot press drying at 180 ℃ for 1min to obtain a cone blank;
(2) Mixing a nano cellulose water solution with the mass percentage of 2% and a chitosan water solution with the mass percentage of 1% according to the mass ratio of 1:1 to obtain a mixed water solution;
(3) Immersing the cone blank obtained in the step (1) into the mixed aqueous solution obtained in the step (2) for treatment for 40s, and finally drying for 35min at 110 ℃ to obtain the composite cone.
Example 4
A composite cone comprises a cone blank and a surface treatment layer coated on the surface of the cone blank;
wherein, the raw material for preparing the paper cone blank is bamboo pulp, and the material of the surface treatment layer comprises nanocellulose and chitosan;
the preparation method of the composite cone provided by the embodiment comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 20 DEG SR, then adding water for dilution, stirring and dispersing for 3min at a rotating speed of 1200rpm, adjusting the pulp concentration to 0.1%, filtering water, forming, and finally carrying out hot press drying at 180 ℃ for 1min to obtain a cone blank;
(2) Mixing a nano cellulose water solution with the mass percentage of 2% and a chitosan water solution with the mass percentage of 2% according to the mass ratio of 1:5 to obtain a mixed water solution;
(3) Immersing the cone blank obtained in the step (1) into the mixed aqueous solution obtained in the step (2) for 80s, and finally drying at 105 ℃ for 60min to obtain the composite cone.
Example 5
A composite cone comprises a cone blank and a surface treatment layer coated on the surface of the cone blank;
wherein, the raw material for preparing the paper cone blank is bamboo pulp, and the material of the surface treatment layer comprises nanocellulose and chitosan;
the preparation method of the composite cone provided by the embodiment comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 20 DEG SR, then adding water for dilution, stirring and dispersing for 6min at a rotating speed of 800rpm, adjusting the pulp concentration to 0.1%, filtering water, forming, and finally carrying out hot press drying at 180 ℃ for 1min to obtain a cone blank;
(2) Mixing a nano cellulose water solution with the mass percentage of 0.5% and a chitosan water solution with the mass percentage of 0.5% according to the mass ratio of 1:0.5 to obtain a mixed water solution;
(3) Immersing the cone blank obtained in the step (1) into the mixed aqueous solution obtained in the step (2) for 80s, and finally drying at 105 ℃ for 60min to obtain the composite cone.
Example 6
A composite cone comprises a cone blank and a surface treatment layer coated on the surface of the cone blank;
wherein, the raw material for preparing the paper cone blank is bamboo pulp, and the material of the surface treatment layer comprises nanocellulose and chitosan;
the preparation method of the composite cone provided by the embodiment comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 20 DEG SR, then adding water for dilution, stirring and dispersing for 6min at a rotating speed of 800rpm, adjusting the pulp concentration to 0.1%, filtering water, forming, and finally carrying out hot press drying at 180 ℃ for 1min to obtain a cone blank;
(2) Mixing a nano cellulose water solution with the mass percentage of 1% with a chitosan water solution with the mass percentage of 1% according to the mass ratio of 1:4 to obtain a mixed water solution;
(3) Immersing the cone blank obtained in the step (1) into the mixed aqueous solution obtained in the step (2) for 80s, and finally drying at 105 ℃ for 60min to obtain the composite cone.
Example 7
The composite cone differs from example 1 only in that an oven dry mass ratio of 1:1 and straw pulp were used in place of the oven dried bamboo pulp in step (1), and the other materials and preparation methods were the same as in example 1.
Example 8
The composite cone is different from the embodiment 1 only in that the bamboo pulp and bagasse pulp with the absolute dry mass ratio of 1:1 are used for replacing the absolute dry bamboo pulp in the step (1), and other substances and preparation methods are the same as those in the embodiment 1.
Comparative example 1
A paper cone, the preparation method includes: weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 18 DEG SR, then adding water for dilution, stirring and dispersing for 4min at a rotating speed of 1000rpm, adjusting the pulp concentration to 0.1%, filtering water, forming, and finally carrying out hot press drying at 180 ℃ for 1min to obtain the cone.
Comparative example 2
A preparation method of the composite cone comprises the following steps: weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 18 DEG SR, then adding water for dilution, stirring and dispersing for 2min at a rotating speed of 1000rpm, then adding 0.1g of nanocellulose for continuous dispersing for 2min, adjusting the pulp concentration to 0.1%, filtering water for forming, and finally carrying out hot pressing and drying at 180 ℃ for 1min to obtain the composite cone.
Comparative example 3
The preparation method of the composite cone comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 18 DEG SR, then adding water for dilution, stirring and dispersing for 4min at a rotating speed of 1000rpm, adjusting the pulp concentration to 0.1%, filtering water, forming, and finally carrying out hot press drying at 180 ℃ for 1min to obtain a cone blank;
(2) And (3) immersing the paper cone blank obtained in the step (1) in a nano cellulose water solution with the mass percentage of 0.5% for 50s, and finally drying at 100 ℃ for 40min to obtain the composite paper cone.
Comparative example 4
The preparation method of the composite cone comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 18 DEG SR, then adding water for dilution, stirring and dispersing for 4min at a rotating speed of 1000rpm, adjusting the pulp concentration to 0.1%, filtering water, forming, and finally carrying out hot press drying at 180 ℃ for 1min to obtain a cone blank;
(2) Immersing the paper cone blank obtained in the step (1) in water for 50s, and finally drying at 100 ℃ for 40min to obtain the composite paper cone.
Comparative example 5
The preparation method of the composite cone comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 18 DEG SR, then adding water for dilution, stirring and dispersing for 4min at a rotating speed of 1000rpm, adjusting the pulp concentration to 0.1%, filtering water, forming, and finally carrying out hot press drying at 180 ℃ for 1min to obtain a cone blank;
(2) And (3) immersing the paper cone blank obtained in the step (1) in a chitosan aqueous solution with the mass percentage of 0.5% for 50s, and finally drying at 100 ℃ for 40min to obtain the composite paper cone.
Comparative example 6
The preparation method of the composite cone comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 18 DEG SR, adding water for dilution, stirring and dispersing for 4min at a rotating speed of 1000rpm, adjusting the pulp concentration to 0.1%, filtering water for forming, and finally carrying out hot pressing and drying for 1min at 180 ℃ to obtain a cone blank;
(2) And (3) immersing the paper cone blank obtained in the step (1) in a cationic styrene-acrylic emulsion with the mass percentage of 0.5%, treating for 50s, and finally drying at 100 ℃ for 40min to obtain the composite paper cone.
Comparative example 7
The preparation method of the composite cone comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 18 DEG SR, adding water for dilution, stirring and dispersing for 4min at a rotating speed of 1000rpm, adjusting the pulp concentration to 0.1%, filtering water for forming, and finally carrying out hot pressing and drying for 1min at 180 ℃ to obtain a cone blank;
(2) Mixing a nanocellulose aqueous solution with the mass percentage of 1% with a cationic styrene-acrylic emulsion with the mass percentage of 1% according to the mass ratio of 1:1 to obtain a mixed aqueous solution;
(3) Immersing the cone blank obtained in the step (1) into the mixed aqueous solution obtained in the step (2) for treatment for 50s, and finally drying at 100 ℃ for 40min to obtain the composite cone.
Comparative example 8
The preparation method of the composite cone comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 18 DEG SR, adding water for dilution, stirring and dispersing for 4min under the condition of 1000rpm, adjusting the pulp concentration to 0.1%, and filtering water at a net part to obtain a wet cone;
(2) Spraying a nano cellulose water solution with the mass fraction of 0.5% on the front surface of the paper cone obtained in the step (1), and carrying out hot pressing and drying for 1min at 180 ℃ to obtain the paper cone.
Comparative example 9
The preparation method of the composite cone comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 18 DEG SR, adding water for dilution, stirring and dispersing for 4min under the condition of 1000rpm, adjusting the pulp concentration to 0.1%, and filtering water at a net part to obtain a wet cone;
(2) Spraying an aqueous solution of nano cellulose with the mass fraction of 0.5% on the front surface of the wet paper cone obtained in the step (1), and carrying out hot pressing and drying for 1min at 180 ℃ to obtain the paper cone;
(3) And (3) immersing the paper cone obtained in the step (4) in a chitosan aqueous solution with the mass percentage of 0.5% for 50s, and then drying at 110 ℃ for 40min to obtain the composite paper cone.
Comparative example 10
The preparation method of the cone comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 18 DEG SR, adding water for dilution, stirring and dispersing for 4min under the condition of 1000rpm, adjusting the pulp concentration to 0.1%, and filtering water at a net part to obtain a wet cone;
(2) Spraying an aqueous solution of nanocellulose with the mass fraction of 0.5% on the front and the back of the wet paper cone obtained in the step (1), and hot-pressing and drying at 180 ℃ for 1min to obtain the paper cone.
Comparative example 11
The preparation method of the composite cone comprises the following steps:
(1) Weighing 10g of absolute dry bamboo pulp, adding water, pulping to a pulping degree of 18 DEG SR, adding water for dilution, stirring and dispersing for 4min under the condition of 1000rpm, and regulating the pulp concentration to 0.1% of the water filtering of a net part to obtain a wet cone;
(2) Spraying an aqueous solution of nanocellulose with the mass fraction of 0.5% on the front and the back of the wet paper cone obtained in the step (1), and hot-pressing and drying at 180 ℃ for 1min to obtain the paper cone;
(3) And (3) immersing the paper cone obtained in the step (2) in a chitosan aqueous solution with the mass percentage of 0.5% for 50s, and then drying at 110 ℃ for 40min to obtain the composite paper cone.
Performance test:
(1) Density: obtaining the mass of a sample through an analytical balance test, obtaining the thickness of the sample through a thickness meter test, respectively measuring the thickness and the mass of the same sample for three times, taking an average value, and calculating to obtain the density of the sample;
(2) Modulus: measuring Young modulus by using a material parameter test module MPM in a KLIPPEL test system;
the paper cones provided in examples 1 to 8 and comparative examples 1 to 11 were tested according to the above test methods, and the test results are shown in table 1:
TABLE 1
As can be seen from table 1:
the density of the composite cone obtained in examples 1 to 6 was 0.54 to 0.61g/cm 3 The modulus is as high as 3.83-4.28 Gpa, and has lower density and higher modulus;
compared with example 1, the cone provided in comparative example 1 has not been surface treated and has a modulus of only 3.1Gpa; the composite cone prepared by the method of adding nano cellulose into the pulp in comparative example 2 has lower modulus as well, which is only 3.8Gpa; the cone provided in comparative examples 3 and 4 was impregnated with 0.5% aqueous solution of nanocellulose and water, respectively, and the moduli of the cone obtained were only 2.01Gpa and 1.99Gpa, indicating that the enhancement effect could not be achieved when the surface treatment was performed using only 0.5% aqueous solution of nanocellulose; the effects of the comparative example 5 in which only chitosan was used for impregnation and the comparative example 6 in which cationic styrene-acrylic emulsion was used for impregnation and the comparative example 7 in which nanocellulose and cationic styrene-acrylic emulsion were used in combination were not ideal, and the modulus of the cone was not significantly improved.
Compared with the embodiment 1, the comparative examples 8 and 10 spray-coat the nanocellulose on the surface of the wet paper cone, because the nanocellulose is deposited on the surface of the wet paper, in the subsequent hot press drying process, the moisture evaporates rapidly, and the nanocellulose and the bamboo pulp fiber form hydrogen bonding effect, so that the bonding force between the fibers is enhanced, and the strength performance of the paper cone is greatly improved; however, in comparative example 9 and comparative example 11, the surface of the cone sprayed with nanocellulose is further treated with chitosan, and the modulus of the obtained composite cone is rather reduced, which is probably due to the fact that the hydrophilicity of the surface of the paper sprayed with nanocellulose is reduced, when the chitosan is impregnated, the chitosan cannot effectively form a film on the surface of the bamboo pulp fiber, and meanwhile, the hydrogen bond inside the bamboo pulp fiber is disabled due to impregnation, and the performance is reduced after re-drying; however, it is important to say that the composite cone obtained by the spraying method is difficult to prepare and is not beneficial to mass industrialized production.
The modulus of the composite cone obtained by using the absolute bamboo pulp and the rice straw pulp in example 7 and the absolute bamboo pulp and the bagasse pulp in example 8 is slightly reduced compared with example 1, but the modulus of the composite cone is obviously increased compared with that of the bamboo pulp cone in comparative example 1.
The applicant states that the present invention is described by way of the above examples as a composite cone and a method of making and using the same, but the present invention is not limited to, i.e. it is not meant that the present invention must be practiced in dependence upon the above examples. It should be apparent to those skilled in the art that any modification of the present invention, equivalent substitution of raw materials for the product of the present invention, addition of auxiliary components, selection of specific modes, etc., falls within the scope of the present invention and the scope of disclosure.
Claims (10)
1. The composite cone is characterized by comprising a cone blank and a surface treatment layer coated on the surface of the cone blank;
the paper cone blank is prepared from non-wood pulp;
the material of the surface treatment layer comprises nanocellulose and chitosan.
2. The composite cone of claim 1, wherein the non-wood pulp comprises any one or a combination of at least two of bamboo pulp, rice straw pulp or bagasse pulp, preferably bamboo pulp.
3. The composite cone according to claim 1 or 2, wherein the cone blank is obtained by sequentially pulping, diluting, filtering and forming non-wood pulp, and hot-pressing;
preferably, the freeness of the non-wood pulp is 18-23 DEG SR.
4. A composite cone according to any one of claims 1 to 3, wherein the nanocellulose has a diameter of 5 to 50nm;
preferably, the length of the nanocellulose is 10-1000 nm;
preferably, the viscosity of the chitosan is 100 to 300 Pa.s.
5. A method of producing a composite cone according to any one of claims 1 to 4, comprising: immersing the cone blank in a mixed water solution containing nano cellulose and chitosan, taking out and drying to obtain the composite cone.
6. The method according to claim 5, wherein the mixed aqueous solution containing nanocellulose and chitosan is obtained by mixing an aqueous solution containing nanocellulose and an aqueous solution containing chitosan;
preferably, the mass ratio of the aqueous solution containing nanocellulose and the aqueous solution containing chitosan is 1 (0.5-5), and more preferably 1 (1-4).
7. The preparation method according to claim 6, wherein the mass percentage of nanocellulose in the nanocellulose-containing aqueous solution is 0.25-2%;
preferably, the mass percentage of chitosan in the aqueous solution containing chitosan is 0.5-2%.
8. The method according to any one of claims 5 to 7, wherein the time of the impregnation is 40 to 80 seconds.
9. The method according to any one of claims 5 to 8, wherein the drying temperature is 100 to 120 ℃;
preferably, the drying time is 30-60 min.
10. A loudspeaker, characterized in that it comprises a composite cone according to any one of claims 1-4.
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