CN116556112A - Nanocellulose-reinforced antistatic carrier tape paper and preparation process thereof - Google Patents
Nanocellulose-reinforced antistatic carrier tape paper and preparation process thereof Download PDFInfo
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- CN116556112A CN116556112A CN202310619816.1A CN202310619816A CN116556112A CN 116556112 A CN116556112 A CN 116556112A CN 202310619816 A CN202310619816 A CN 202310619816A CN 116556112 A CN116556112 A CN 116556112A
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- nanocellulose
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- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 239000000835 fiber Substances 0.000 claims abstract description 92
- 229920001046 Nanocellulose Polymers 0.000 claims abstract description 66
- 239000004760 aramid Substances 0.000 claims abstract description 63
- 229920003235 aromatic polyamide Polymers 0.000 claims abstract description 63
- 239000000725 suspension Substances 0.000 claims abstract description 55
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 41
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 41
- 125000002091 cationic group Chemical group 0.000 claims abstract description 39
- 239000002002 slurry Substances 0.000 claims abstract description 33
- 238000001035 drying Methods 0.000 claims abstract description 17
- 229920006231 aramid fiber Polymers 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 239000006185 dispersion Substances 0.000 claims description 37
- 239000008367 deionised water Substances 0.000 claims description 32
- 229910021641 deionized water Inorganic materials 0.000 claims description 32
- 238000003860 storage Methods 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 25
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 claims description 22
- 229920002472 Starch Polymers 0.000 claims description 21
- 239000008107 starch Substances 0.000 claims description 21
- 235000019698 starch Nutrition 0.000 claims description 21
- 229920002201 Oxidized cellulose Polymers 0.000 claims description 17
- 229940107304 oxidized cellulose Drugs 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 17
- 229920003043 Cellulose fiber Polymers 0.000 claims description 16
- GDOPTJXRTPNYNR-UHFFFAOYSA-N methyl-cyclopentane Natural products CC1CCCC1 GDOPTJXRTPNYNR-UHFFFAOYSA-N 0.000 claims description 14
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 11
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000003760 magnetic stirring Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- 229920002678 cellulose Polymers 0.000 claims description 6
- 239000001913 cellulose Substances 0.000 claims description 6
- 238000000265 homogenisation Methods 0.000 claims description 6
- 239000002121 nanofiber Substances 0.000 claims description 6
- 238000005119 centrifugation Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 7
- 239000002131 composite material Substances 0.000 abstract description 4
- 238000004806 packaging method and process Methods 0.000 abstract description 4
- 239000003814 drug Substances 0.000 abstract description 3
- 239000007772 electrode material Substances 0.000 abstract description 2
- 238000004377 microelectronic Methods 0.000 abstract description 2
- 238000005215 recombination Methods 0.000 abstract description 2
- 230000006798 recombination Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 11
- 230000014759 maintenance of location Effects 0.000 description 11
- 230000003068 static effect Effects 0.000 description 11
- 230000009471 action Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000003756 stirring Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004537 pulping Methods 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002048 multi walled nanotube Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/10—Wire-cloths
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
-
- 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
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/26—Polyamides; Polyimides
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/25—Cellulose
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
- D21H17/29—Starch cationic
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
-
- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
- D21H21/52—Additives of definite length or shape
-
- 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
Abstract
The invention relates to the technical field of preparation of nanocellulose and microelectronic paper-based composite materials, in particular to nanocellulose-reinforced antistatic carrier tape paper and a preparation process thereof, wherein the preparation process comprises the following steps: step 1, raw material preparation: step 2, obtaining a mixed system B; step 3, preparing a slurry suspension C; step 4, preparing a wet paper web of nano cellulose/carbon nano tube/cationic starch-aramid pulp fiber; and 5, sequentially carrying out squeezing treatment and drying treatment on the wet paper web of the nano cellulose/carbon nano tube/cationic starch-aramid fiber obtained in the step 4 to obtain the nano cellulose-assisted antistatic carrier tape paper. The invention can prepare the antistatic carrier tape paper with good conductivity and high fiber/functional component recombination rate, solves the problem that the traditional paper carrier tape is not antistatic, and can be used in the fields of composite material enhancement, flexible display, transparent packaging, high-efficiency filtration, biological medicine, electrode materials, battery diaphragms, intelligent sensing and the like.
Description
Technical Field
The invention belongs to the technical field of preparation of nanocellulose and microelectronic paper-based composite materials, and particularly relates to nanocellulose-reinforced antistatic carrier tape paper and a preparation process thereof.
Background
In recent years, as people have deepened the understanding of electrostatic hazard, antistatic packaging plays an increasingly important role. The paper carrier tape, which is an auxiliary product for packaging, protecting and processing electronic components, is mainly applied to the electronic component mounting industry and has the advantages of good rebound, high dimensional accuracy, convenient preparation, low cost and the like. In the surface mounting process of electronic components by using paper carrier tapes, an antistatic technology is an important technical level affecting mounting stability. Plastic carrier tapes are more prone to static electricity than paper carrier tapes. Generally, electronic components are sensitive to static electricity, and the existence of static electricity can enable the electronic components to be adsorbed by static electricity and separate from carrier holes in the surface mounting process, so that the normal mounting process is affected, and therefore, a good paper carrier tape often cannot be separated from a perfect antistatic treatment technology.
The multi-wall Carbon Nano Tube (CNT) is a one-dimensional quantum material formed by curling a single layer or multiple layers of graphene layers around a central axis according to a certain spiral angle, has extremely high tensile strength, elastic modulus and highest specific strength, and simultaneously has strong flexibility, good conductivity and chemical stability. Nanocellulose is a cellulose product which is obtained by treating cellulose by chemical, physical, microbial and other methods and has a dimension in the nanoscale (0.1-100 nm) range. It has nanoscale effects and other excellent properties: the strength is high, and compared with the carbon fiber with the strength of 1.5-5.5GPa, the strength of the nanocellulose can reach 7.5GPa; has large length-diameter ratio, and the length-diameter ratio of the nanocellulose can reach300, which is far higher than the length-diameter ratio (30-130) of the plant fiber; has high specific surface area, the specific surface area of the nanocellulose can reach 150m2/g, which is higher than that of the plant fiber (1-3 m) 2 /g); fourth, the modified polyurethane has high surface activity and a large number of active groups such as-OH, -COOH and the like. In the papermaking field, the nanocellulose can be used as an auxiliary agent for enhancing the strength of paper, reducing the energy consumption (the energy consumption for drying can be reduced by 30 percent by adding filler), reducing the pulping energy consumption and improving the air and water vapor barrier property of the packaging material. However, no carrier paper technology is available at present, which is made by compounding materials such as nanocellulose, carbon nano tubes and the like. Based on the above, the invention provides the nanocellulose-reinforced antistatic carrier tape paper and the preparation process thereof.
Disclosure of Invention
Aiming at the problems of low tearing degree, no antistatic function and the like of the traditional carrier tape and low retention rate of functional components in the preparation process, the invention provides the nanocellulose-reinforced antistatic carrier tape and the preparation process thereof.
The technical scheme adopted by the invention is as follows:
a process for preparing nanocellulose-reinforced antistatic carrier tape paper comprises the following steps:
step 1, raw material preparation:
preparing a cellulose mixed solution fiber suspension a: carrying out constant temperature and humidity pretreatment on the aramid pulp fibers, and preparing an aramid pulp fiber dispersion liquid; then, the aramid pulp fiber dispersion liquid is fluffed by deionized water to obtain an aramid pulp fiber suspension liquid A;
preparation of TEMPO-oxidized cellulose nanofiber dispersion: oxidizing cellulose fiber suspension by using TEMPO, sodium bromide and sodium hypochlorite, and performing adjustment treatment at room temperature to obtain oxidized cellulose; washing oxidized cellulose fibers to be neutral by deionized water, and sequentially carrying out homogenization treatment and centrifugation treatment to obtain TEMPO oxidized cellulose nanofiber dispersoid;
step 2, adding nanocellulose, carbon nano tubes and cationic starch into an aramid pulp fiber suspension A, and then obtaining a mixed system B under magnetic stirring treatment;
step 3, water is firstly added into a pulp storage chamber of a paper sheet former, and then the mixed system B is poured into the pulp storage chamber to form mixed pulp of aramid pulp fibers, nanocellulose and the like, so as to obtain pulp suspension C;
step 4, homogenizing the slurry suspension C in the slurry storage chamber, dehydrating the homogenized slurry suspension C through a forming wire in a first vacuum suction atmosphere, and then performing second vacuum suction to obtain a wet paper web of nano cellulose/carbon nano tube/cationic starch-aramid pulp fibers;
and 5, sequentially carrying out squeezing treatment and drying treatment on the wet paper web of the nano cellulose/carbon nano tube/cationic starch-aramid fiber obtained in the step 4 to obtain the nano cellulose-assisted antistatic carrier tape paper.
Preferably, in step 1, the fiber mass fraction of the aramid pulp fiber dispersion is 18% to 20%.
Preferably, in step 1, the ratio of the aramid pulp fiber dispersion to deionized water is (100-200) mL: (800-1000) mL.
Preferably, in step 1, the ratio of TEMPO, sodium bromide, sodium hypochlorite, cellulose fibers is (0.01 to 0.02) g: (0.05-0.15) g: (14.80-74.50) g: (1.0-2.0) g, wherein the cellulosic fiber suspension used is (8-12) mg/mL;
the pH value is adjusted to 10-11 during treatment, and the treatment time is 3-6 hours;
the pressure during the homogenizing treatment is 80-100 MPa, and the times are 20-30 times.
Preferably, in the step 2, the weight ratio of the aramid pulp fiber to the nanocellulose, the carbon nanotube, the cationic starch and the deionized water is (1.125-1.130) g, (0.250-1.252) g, (1.882-1.886) g, (1-2) g, and (1.0-2.0) L.
Preferably, in step 3, the water supply amount of the slurry storage chamber is 3.5-6.5L.
Preferably, in the step 4, the number of times of homogenization is 10-20 times, and the time is 8-15 s; the filter mesh number of the filter screen of the forming net is 200-600, and the time for the second vacuum suction is 5-10 s.
Preferably, in step 5, the pressure during the pressing treatment is 0.2 to 0.6Mpa for 6 to 10 minutes.
Preferably, in step 5, the temperature at the time of drying treatment is 95 to 120 ℃, the pressure is 0.4MPa, and the time is 15 to 20 minutes.
A nanocellulose-assisted antistatic carrier tape obtained by the nanocellulose-reinforced antistatic carrier tape preparation process.
Compared with the prior art, the invention has the following beneficial technical effects:
firstly, the invention takes carbon nano tube, nano cellulose, aramid pulp and cationic starch as core groups, and the adopted raw materials and reagents are conventional medicine reagents, so that good foundation is laid for engineering of low-toxicity, low-cost and easily-obtained antistatic carrier tape. The nano cellulose, the carbon nano tube and the cationic starch are dispersed into the aramid pulp fiber to prepare the antistatic carrier tape paper with good conductivity and high fiber/functional component recombination rate, so that the problem that the traditional paper carrier tape is not antistatic is solved, and the antistatic carrier tape can be used in the fields of composite material enhancement, flexible display, transparent packaging, efficient filtration, biological medicine, electrode materials, battery diaphragms, intelligent sensing and the like.
Secondly, unlike the traditional carrier tape paper, the invention introduces a trace amount of carbon nano tube as a conductive component to regulate and control the conductive performance of the carrier tape paper and prevent the influence of environment and surrounding static electricity on electronic components protected by the carrier tape paper.
Furthermore, in order to improve the retention rate of the carbon nanotubes in the carrier paper, cationic starch is introduced, so that the slurry retention is improved, the dispersion of the nanocellulose and the carbon nanotubes in the paper is promoted, and the cationic starch is mainly used for improving the paper retention through the charge effect of an ion system and the viscosity brought by the molecular weight.
Furthermore, in order to regulate and control the tearing degree of paper and avoid the problems of hair and splitting of paper, the component nanocellulose is preferably used as a plasticizing functional component, and the paper tearing degree is improved by virtue of good plasticity, elongation and cuttability of the nanocellulose and self-film forming characteristics, so that the hair and the powder are prevented from being dropped, and the application is influenced.
Furthermore, considering that the fine components are more in the papermaking process, the traditional rough filter screen cannot be used, the wet forming papermaking is carried out by adopting the 1000-mesh filter screen, and the paper retention rate is improved by sacrificing the papermaking efficiency. The premise of the strategy is that the quality of the carrier tape is not equal, and a product with higher quality is obtained by reducing the production efficiency, but the supply capacity of enterprises is not affected, so that the carrier tape is a result of long-term process familiarity optimization.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
The invention will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the invention.
The invention discloses a preparation process of nanocellulose-reinforced antistatic carrier tape paper, which comprises the following steps:
step 1, raw material preparation:
preparing a cellulose mixed solution fiber suspension a: carrying out constant temperature and humidity pretreatment on the aramid pulp fibers, and preparing an aramid pulp fiber dispersion liquid; and then the aramid pulp fiber dispersion liquid is fluffed by deionized water to obtain an aramid pulp fiber suspension liquid A.
Wherein, the pretreatment of the constant temperature and humidity treatment is carried out in a constant temperature and humidity box, the set temperature of the constant temperature and humidity box is 20-30 ℃, the humidity is 60-80 percent, and the box is placed for 3-5 days.
When the preparation is carried out, the aramid pulp fiber dispersion liquid is treated by a pulping machine, the power of the pulping machine is 2.2KW, the rotating speed of a main shaft is 900-1000 r/min, and the treatment time is 13-15 min.
Aramid pulp fiber dispersion and deionized water in (100-200) mL: (800-1000) mL, and the untwining revolution number is 20000-40000 revolutions during untwining.
Preparation of TEMPO-oxidized cellulose nanofiber dispersion: oxidizing cellulose fiber suspension by using TEMPO, sodium bromide and sodium hypochlorite, and performing adjustment treatment at room temperature to obtain oxidized cellulose; and washing the oxidized cellulose fiber to be neutral by using deionized water, and sequentially carrying out homogenization treatment and centrifugation treatment to obtain the TEMPO oxidized cellulose nanofiber dispersion.
Wherein, the mixture ratio of TEMPO, sodium bromide, sodium hypochlorite and cellulose fiber is (0.01-0.02) g: (0.05-0.15) g: (14.80-74.50) g: (1.0-2.0) g, wherein the cellulosic fiber suspension used is (8-12) mg/mL;
the pH value is adjusted to 10-11 during treatment, and the treatment time is 3-6 hours;
the pressure during the homogenizing treatment is 80-100 MPa, and the times are 20-30 times.
And 2, adding the nanocellulose, the carbon nanotube and the cationic starch into the aramid pulp fiber suspension A, and then obtaining a mixed system B under the magnetic stirring treatment.
Wherein, the weight ratio of the aramid pulp fiber to the nano-cellulose, the carbon nano-tube, the cationic starch and the deionized water is (1.125-1.130) g, (0.250-1.252) g, (1.882-1.886) g, (1-2) g and (1.0-2.0) L.
The bottle mouth is sealed during magnetic stirring, the stirring reaction time is (10-30) min, and the rotating speed is (300-600) r/min.
And 3, firstly adding water for 3.5-6.5L in a pulp storage chamber of the paper sheet former, and then pouring the mixed system B into the pulp storage chamber to form pulp suspension C containing aramid pulp fibers and nanocellulose.
And 4, homogenizing the slurry suspension C in the slurry storage chamber, dehydrating the homogenized slurry suspension C through a forming wire in a first vacuum suction atmosphere, and then performing second vacuum suction to obtain the nanocellulose/carbon nano tube/cationic starch-aramid pulp fiber wet paper web.
Wherein the times of homogenization are 10-20 times and the time is 8-15 s.
The filter mesh number of the filter screen of the forming net is 200-600, and the time for the second vacuum suction is 5-10 s.
And 5, sequentially carrying out squeezing treatment and drying treatment on the wet paper web of the nano cellulose/carbon nano tube/cationic starch-aramid fiber obtained in the step 4 to obtain the nano cellulose-assisted antistatic carrier tape paper.
Wherein the pressure during the squeezing treatment is 0.2-0.6 Mpa, and the time is 6-10 min; the temperature is 95-120 ℃, the pressure is 0.4MPa, and the time is 15-20 min during the drying treatment.
Example 1
Step 1, placing the aramid pulp fibers in a constant temperature and humidity box for pretreatment, setting the temperature to 25 ℃, the humidity to 70%, and standing for 5 days, and then preparing an aramid pulp fiber dispersion liquid with the fiber mass fraction of 18%. Adding the prepared aramid pulp fiber dispersion liquid and deionized water into a standard fiber fluffer for pulp preparation, wherein the aramid pulp fiber dispersion liquid and the deionized water are mixed according to 100mL:1000mL was added and the mixture was fluffed using a standard fluffer for 20000 revolutions to give suspension A.
1.0g of cellulose fibers were oxidized with 0.010g of TEMPO, 0.06g of sodium bromide and 20g of sodium hypochlorite, using a cellulose fiber suspension of 8mg/ml. The pH was maintained at room temperature for about 10.5 for 3 hours. The oxidized cellulose fibers were then washed to neutrality with deionized water, homogenized 20 times at 80MPa, and centrifuged at 8000rpm for 10min to obtain a uniform TOCN dispersion.
Step 2, adding 0.8g, 0.25g, 0.1g, 0.06g and 1.0L of aramid pulp fiber, nanocellulose, carbon nanotube, cationic starch and deionized water respectively, and stirring for 15 minutes under the action of magnetic stirring at the rotating speed of 400r/min to obtain a mixed system B;
step 3, adding 3.5L of water into a pulp storage chamber of a paper sheet former, and pouring the mixed pulp suspension A into the pulp storage chamber to form mixed pulp of aramid pulp fibers, nanocellulose and the like, so as to obtain pulp suspension C;
step 4, homogenizing the slurry suspension C in the slurry storage chamber for 10 times by using a homogenizing roller for 10 seconds, dehydrating the slurry suspension C under the action of vacuum suction through a forming wire, performing secondary vacuum suction treatment under the condition that the vacuum degree is 6MPa after the slurry is filtered and ended, filtering the forming wire with the mesh number of 500 meshes by using a filter screen, and performing vacuum suction for 10 seconds to obtain a nanocellulose/carbon nano tube/cationic starch-aramid fiber wet paper web;
step 5, placing felts on two sides of the wet paper web of the nano cellulose/carbon nano tube/cationic starch-aramid fiber obtained in the step 4, and then putting the wet paper web into a paper press for pressing, wherein the pressing pressure is 0.5Mpa, and the pressing time is 8min; and then drying in a paper dryer at 115 ℃ under the drying pressure of 0.4MPa for 11min to obtain the nanocellulose-assisted antistatic carrier tape.
The nano cellulose auxiliary antistatic carrier tape paper obtained under the assistance of the carbon nano tube and the cationic starch has excellent conductivity, the sample mass of the carrier tape paper is 1.21g, the conductivity reaches 30S cm, the generation of static electricity is effectively avoided, the retention rate reaches 85%, and the powder falling phenomenon of the carrier tape paper is weakened.
Example 2
Step 1, placing the aramid pulp fibers in a constant temperature and humidity box for pretreatment, setting the temperature to 25 ℃, the humidity to 70%, and standing for 5 days, and then preparing an aramid pulp fiber dispersion liquid with the fiber mass fraction of 18%. Adding the prepared aramid pulp fiber dispersion liquid and deionized water into a standard fiber fluffer for pulp preparation, wherein the aramid pulp fiber dispersion liquid and the deionized water are mixed according to 100mL:1000mL was added and the mixture was fluffed using a standard fluffer for 20000 revolutions to give suspension A.
1.0g of cellulose fibers were oxidized with 0.012g of TEMPO, 0.08g of sodium bromide and 30g of sodium hypochlorite, using a cellulose fiber suspension of 9mg/ml. The pH was maintained at room temperature for about 10.5 for 3 hours. The oxidized cellulose fibers were then washed to neutrality with deionized water, homogenized 20 times at 80MPa, and centrifuged at 8000rpm for 10min to obtain a uniform TOCN dispersion.
Step 2, adding 0.8g, 0.22g, 0.1g, 0.06g and 1.0L of aramid pulp fiber, nanocellulose, carbon nanotube, cationic starch and deionized water respectively, and stirring for 15 minutes under the action of magnetic stirring at the rotating speed of 400r/min to obtain a mixed system B;
step 3, adding 3.5L of water into a pulp storage chamber of a paper sheet former, and pouring the mixed pulp suspension A into the pulp storage chamber to form mixed pulp of aramid pulp fibers, nanocellulose and the like, so as to obtain pulp suspension C;
step 4, homogenizing the slurry suspension C in the slurry storage chamber for 10 times by using a homogenizing roller for 10 seconds, dehydrating the slurry suspension C under the action of vacuum suction through a forming wire, performing secondary vacuum suction treatment under the condition that the vacuum degree is 6MPa after the slurry is filtered and ended, filtering the forming wire with the mesh number of 500 meshes by using a filter screen, and performing vacuum suction for 10 seconds to obtain a nanocellulose/carbon nano tube/cationic starch-aramid fiber wet paper web;
step 5, placing felts on two sides of the wet paper web of the nano cellulose/carbon nano tube/cationic starch-aramid fiber obtained in the step 4, and then putting the wet paper web into a paper press for pressing, wherein the pressing pressure is 0.5Mpa, and the pressing time is 8min; and then drying in a paper dryer at 115 ℃ under the drying pressure of 0.4MPa for 11min to obtain the nanocellulose-assisted antistatic carrier tape.
The nano cellulose auxiliary antistatic carrier tape paper obtained under the assistance of the carbon nano tube and the cationic starch has excellent conductivity, the sample mass of the carrier tape paper is 1.18g, the conductivity reaches 35S cm, the generation of static electricity is effectively avoided, the retention rate reaches 87%, and the powder falling phenomenon of the carrier tape paper is weakened.
Example 3
Step 1, placing the aramid pulp fibers in a constant temperature and humidity box for pretreatment, setting the temperature to 25 ℃, the humidity to 70%, and standing for 5 days, and then preparing an aramid pulp fiber dispersion liquid with the fiber mass fraction of 18%. Adding the prepared aramid pulp fiber dispersion liquid and deionized water into a standard fiber fluffer for pulp preparation, wherein the aramid pulp fiber dispersion liquid and the deionized water are mixed according to 100mL:1000mL was added and the mixture was fluffed using a standard fluffer for 20000 revolutions to give suspension A.
1.0g of cellulose fibers were oxidized with 0.014g of TEMPO, 0.10g of sodium bromide and 40g of sodium hypochlorite, using a cellulose fiber suspension of 10mg/ml. The pH was maintained at room temperature for about 10.5 for 3 hours. The oxidized cellulose fibers were then washed to neutrality with deionized water, homogenized 20 times at 80MPa, and centrifuged at 8000rpm for 10min to obtain a uniform TOCN dispersion.
Step 2, adding 0.8g, 0.15g, 0.1g, 0.06g and 1.0L of aramid pulp fiber, nanocellulose, carbon nanotube, cationic starch and deionized water respectively, and stirring for 15 minutes under the action of magnetic stirring at the rotating speed of 400r/min to obtain a mixed system B;
step 3, adding 3.5L of water into a pulp storage chamber of a paper sheet former, and pouring the mixed pulp suspension A into the pulp storage chamber to form mixed pulp of aramid pulp fibers, nanocellulose and the like, so as to obtain pulp suspension C;
step 4, homogenizing the slurry suspension C in the slurry storage chamber for 10 times by using a homogenizing roller for 10 seconds, dehydrating the slurry suspension C under the action of vacuum suction through a forming wire, performing secondary vacuum suction treatment under the condition that the vacuum degree is 6MPa after the slurry is filtered and ended, filtering the forming wire with the mesh number of 500 meshes by using a filter screen, and performing vacuum suction for 10 seconds to obtain a nanocellulose/carbon nano tube/cationic starch-aramid fiber wet paper web;
step 5, placing felts on two sides of the wet paper web of the nano cellulose/carbon nano tube/cationic starch-aramid fiber obtained in the step 4, and then putting the wet paper web into a paper press for pressing, wherein the pressing pressure is 0.5Mpa, and the pressing time is 8min; and then drying in a paper dryer at 115 ℃ under the drying pressure of 0.4MPa for 11min to obtain the nanocellulose-assisted antistatic carrier tape.
The nano cellulose auxiliary antistatic carrier tape paper obtained under the assistance of the carbon nano tube and the cationic starch has excellent conductivity, the sample mass of the carrier tape paper is 1.11g, the conductivity reaches 47S cm, the generation of static electricity is effectively avoided, the retention rate reaches 89%, and the powder falling phenomenon of the carrier tape paper is weakened.
Example 4
Step 1, placing the aramid pulp fibers in a constant temperature and humidity box for pretreatment, setting the temperature to 25 ℃, the humidity to 70%, and standing for 5 days, and then preparing an aramid pulp fiber dispersion liquid with the fiber mass fraction of 18%. Adding the prepared aramid pulp fiber dispersion liquid and deionized water into a standard fiber fluffer for pulp preparation, wherein the aramid pulp fiber dispersion liquid and the deionized water are mixed according to 100mL:1000mL was added and the mixture was fluffed using a standard fluffer for 20000 revolutions to give suspension A.
1.0g of cellulose fibers were oxidized with 0.016g of TEMPO, 0.12g of sodium bromide and 50g of sodium hypochlorite, using a cellulose fiber suspension of 11mg/ml. The pH was maintained at room temperature for about 10.5 for 3 hours. The oxidized cellulose fibers were then washed to neutrality with deionized water, homogenized 20 times at 80MPa, and centrifuged at 8000rpm for 10min to obtain a uniform TOCN dispersion.
Step 2, adding 0.8g, 0.27g, 0.1g, 0.06g and 1.0L of aramid pulp fiber, nanocellulose, carbon nanotube, cationic starch and deionized water respectively, and stirring for 15 minutes under the action of magnetic stirring at the rotating speed of 400r/min to obtain a mixed system B;
step 3, adding 3.5L of water into a pulp storage chamber of a paper sheet former, and pouring the mixed pulp suspension A into the pulp storage chamber to form mixed pulp of aramid pulp fibers, nanocellulose and the like, so as to obtain pulp suspension C;
step 4, homogenizing the slurry suspension C in the slurry storage chamber for 10 times by using a homogenizing roller for 10 seconds, dehydrating the slurry suspension C under the action of vacuum suction through a forming wire, performing secondary vacuum suction treatment under the condition that the vacuum degree is 6MPa after the slurry is filtered and ended, filtering the forming wire with the mesh number of 500 meshes by using a filter screen, and performing vacuum suction for 10 seconds to obtain a nanocellulose/carbon nano tube/cationic starch-aramid fiber wet paper web;
step 5, placing felts on two sides of the wet paper web of the nano cellulose/carbon nano tube/cationic starch-aramid fiber obtained in the step 4, and then putting the wet paper web into a paper press for pressing, wherein the pressing pressure is 0.5Mpa, and the pressing time is 8min; and then drying in a paper dryer at 115 ℃ under the drying pressure of 0.4MPa for 11min to obtain the nanocellulose-assisted antistatic carrier tape.
The nano cellulose auxiliary antistatic carrier tape paper obtained under the assistance of the carbon nano tube and the cationic starch has excellent conductivity, the sample mass of the carrier tape paper is 1.23g, the conductivity reaches 21S cm, the generation of static electricity is effectively avoided, the retention rate reaches 84%, and the powder falling phenomenon of the carrier tape paper is weakened.
Example 5
Step 1, placing the aramid pulp fibers in a constant temperature and humidity box for pretreatment, setting the temperature to 25 ℃, the humidity to 70%, and standing for 5 days, and then preparing an aramid pulp fiber dispersion liquid with the fiber mass fraction of 18%. Adding the prepared aramid pulp fiber dispersion liquid and deionized water into a standard fiber fluffer for pulp preparation, wherein the aramid pulp fiber dispersion liquid and the deionized water are mixed according to 100mL:1000mL was added and the mixture was fluffed using a standard fluffer for 20000 revolutions to give suspension A.
1.0g of cellulose fibers were oxidized with 0.018g of TEMPO, 0.14g of sodium bromide and 60g of sodium hypochlorite, using a cellulose fiber suspension of 12mg/ml. The pH was maintained at room temperature for about 10.5 for 3 hours. The oxidized cellulose fibers were then washed to neutrality with deionized water, homogenized 20 times at 80MPa, and centrifuged at 8000rpm for 10min to obtain a uniform TOCN dispersion.
Step 2, adding 0.8g, 0.14g, 0.1g, 0.06g and 1.0L of aramid pulp fiber, nanocellulose, carbon nanotube, cationic starch and deionized water respectively, and stirring for 15 minutes under the action of magnetic stirring at the rotating speed of 400r/min to obtain a mixed system B;
step 3, adding 3.5L of water into a pulp storage chamber of a paper sheet former, and pouring the mixed pulp suspension A into the pulp storage chamber to form mixed pulp of aramid pulp fibers, nanocellulose and the like, so as to obtain pulp suspension C;
step 4, homogenizing the slurry suspension C in the slurry storage chamber for 10 times by using a homogenizing roller for 10 seconds, dehydrating the slurry suspension C under the action of vacuum suction through a forming wire, performing secondary vacuum suction treatment under the condition that the vacuum degree is 6MPa after the slurry is filtered and ended, filtering the forming wire with the mesh number of 500 meshes by using a filter screen, and performing vacuum suction for 10 seconds to obtain a nanocellulose/carbon nano tube/cationic starch-aramid fiber wet paper web;
step 5, placing felts on two sides of the wet paper web of the nano cellulose/carbon nano tube/cationic starch-aramid fiber obtained in the step 4, and then putting the wet paper web into a paper press for pressing, wherein the pressing pressure is 0.5Mpa, and the pressing time is 8min; and then drying in a paper dryer at 115 ℃ under the drying pressure of 0.4MPa for 11min to obtain the nanocellulose-assisted antistatic carrier tape.
The nano cellulose auxiliary antistatic carrier tape paper obtained under the assistance of the carbon nano tube and the cationic starch has excellent conductivity, the sample mass of the carrier tape paper is 1.10g, the conductivity reaches 55S cm, the generation of static electricity is effectively avoided, the retention rate reaches 88%, and the powder falling phenomenon of the carrier tape paper is weakened.
Table 1 shows the relevant technical parameters of the carrier papers prepared in examples 1 to 5, and thus, the retention rate of the antistatic carrier papers prepared by the process route provided by the invention is above 84%, which indicates that the powder falling phenomenon of the prepared antistatic carrier papers is obviously reduced with the aid of cationic starch; under the condition of ensuring the tensile strength and interlayer bonding strength of the paper, the conductivity reaches more than 30S cm, the generation of static electricity is effectively avoided, and the nanocellulose-assisted antistatic carrier tape paper has excellent conductivity.
Table 1 example carrier tape related parameters
The foregoing description of the preferred embodiment of the present invention is not intended to limit the technical solution of the present invention in any way, and it should be understood that the technical solution can be modified and replaced in several ways without departing from the spirit and principle of the present invention, and these modifications and substitutions are also included in the protection scope of the claims.
Claims (10)
1. The preparation process of the nanocellulose-reinforced antistatic carrier tape paper is characterized by comprising the following steps of:
step 1, raw material preparation:
preparing a cellulose mixed solution fiber suspension a: carrying out constant temperature and humidity pretreatment on the aramid pulp fibers, and preparing an aramid pulp fiber dispersion liquid; then, the aramid pulp fiber dispersion liquid is fluffed by deionized water to obtain an aramid pulp fiber suspension liquid A;
preparation of TEMPO-oxidized cellulose nanofiber dispersion: oxidizing cellulose fiber suspension by using TEMPO, sodium bromide and sodium hypochlorite, and performing adjustment treatment at room temperature to obtain oxidized cellulose; washing oxidized cellulose fibers to be neutral by deionized water, and sequentially carrying out homogenization treatment and centrifugation treatment to obtain TEMPO oxidized cellulose nanofiber dispersoid;
step 2, adding nanocellulose, carbon nano tubes and cationic starch into an aramid pulp fiber suspension A, and then obtaining a mixed system B under magnetic stirring treatment;
step 3, water is firstly added into a pulp storage chamber of a paper sheet former, and then the mixed system B is poured into the pulp storage chamber to form mixed pulp of aramid pulp fibers, nanocellulose and the like, so as to obtain pulp suspension C;
step 4, homogenizing the slurry suspension C in the slurry storage chamber, dehydrating the homogenized slurry suspension C through a forming wire in a first vacuum suction atmosphere, and then performing second vacuum suction to obtain a wet paper web of nano cellulose/carbon nano tube/cationic starch-aramid pulp fibers;
and 5, sequentially carrying out squeezing treatment and drying treatment on the wet paper web of the nano cellulose/carbon nano tube/cationic starch-aramid fiber obtained in the step 4 to obtain the nano cellulose-assisted antistatic carrier tape paper.
2. The process for preparing a nanocellulose-reinforced antistatic carrier tape according to claim 1, wherein in step 1, the mass fraction of fibers of the aramid pulp fiber dispersion is 18% -20%.
3. The process for preparing nanocellulose-reinforced antistatic carrier tape paper as claimed in claim 1, wherein in step 1, the ratio of aramid pulp fiber dispersion to deionized water is (100-200) mL: (800-1000) mL.
4. The process for preparing nanocellulose-reinforced antistatic carrier tape paper according to claim 1, wherein in step 1, the ratio of TEMPO, sodium bromide, sodium hypochlorite and cellulose fibers is (0.01-0.02) g: (0.05-0.15) g: (14.80-74.50) g: (1.0-2.0) g, wherein the cellulosic fiber suspension used is (8-12) mg/mL;
the pH value is adjusted to 10-11 during treatment, and the treatment time is 3-6 hours;
the pressure during the homogenizing treatment is 80-100 MPa, and the times are 20-30 times.
5. The process for preparing nanocellulose-reinforced antistatic carrier tape paper according to claim 1, wherein in step 2, the mixture ratio of aramid pulp fiber, nanocellulose, carbon nanotube, cationic starch and deionized water is (1.125-1.130) g, (0.250-1.252) g, (1.882-1.886) g, (1-2) g, and (1.0-2.0) L, calculated by absolute dry weight.
6. The process for preparing nanocellulose-reinforced antistatic carrier tape paper as claimed in claim 1 wherein in step 3, the water loading of the slurry storage chamber is 3.5 to 6.5L.
7. The process for preparing nanocellulose-reinforced antistatic carrier tape paper as claimed in claim 1 wherein in step 4, the number of times of homogenization is 10 to 20 times for 8 to 15 seconds; the filter mesh number of the filter screen of the forming net is 200-600, the time for the second vacuum suction is 5-10 s, and the vacuum degree is 5-8 MPa.
8. The process for preparing nanocellulose-reinforced antistatic carrier tape paper as claimed in claim 1 wherein in step 5, the pressure at the time of the pressing treatment is 0.2 to 0.6Mpa for 6 to 10min.
9. The process for preparing nanocellulose-reinforced antistatic carrier tape paper as claimed in claim 1, wherein in step 5, the temperature is 95-120 ℃, the pressure is 0.4MPa, and the time is 15-20 min.
10. A nanocellulose-assisted antistatic carrier tape obtained from a nanocellulose-reinforced antistatic carrier tape preparation process as claimed in any one of claims 1 to 9.
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