CN-118386647-B - Regenerated cellulose-based high-strength conductive composite packing belt and preparation method thereof

Abstract

The invention discloses a regenerated cellulose-based high-strength conductive composite packing belt and a preparation method thereof, and belongs to the technical field of cellulose-based composite materials. The preparation method comprises the steps of injecting cellulose solution and cellulose/graphene composite solution into different syringes respectively, completely immersing syringe needles into water to push wires, preparing regenerated cellulose wires and regenerated cellulose/graphene composite wires, uniformly laying the regenerated cellulose wires and the regenerated cellulose/graphene composite wires after mixing, uniformly casting with polyvinyl alcohol solution, drying to obtain a semi-finished product of packing belt, brushing the polyvinyl alcohol solution on the regenerated cellulose film, wrapping the semi-finished product of packing belt, and drying to obtain the composite fiber fabric. The preparation method provided by the invention is simple, the cost of raw materials and equipment is low, and the green degradable packing belt with good mechanical properties, water resistance and conductivity can be prepared.

Inventors

• WANG BAOBIN
• WANG XIAO
• YANG GUIHUA
• CHEN JIACHUAN
• YAO WEI
• CHANG YONGGUI
• CHENG YONG

Assignees

• 齐鲁工业大学(山东省科学院)
• 亚太森博（山东）浆纸有限公司

Dates

Publication Date

20260512

Application Date

20240425

Priority Date

20240424

Claims (9)

1. 1. The preparation method of the regenerated cellulose-based high-strength conductive composite packing belt is characterized by comprising the following steps of: A) Injecting cellulose solution and cellulose/graphene composite solution into different syringes respectively, and completely immersing a syringe needle into water to push wires so as to prepare regenerated cellulose wires and regenerated cellulose/graphene composite wires; B) Uniformly laying the regenerated cellulose filaments and the regenerated cellulose/graphene composite filaments after being mixed, uniformly casting the mixture by using a polyvinyl alcohol solution, and then drying the mixture to obtain a semi-finished product of the packing belt, wherein the dosage ratio of the regenerated cellulose filaments to the regenerated cellulose/graphene composite filaments is 5-12:1; c) Coating a polyvinyl alcohol solution on the regenerated cellulose film, wrapping the semi-finished product of the packing belt, and drying to obtain the product; the concentration of the cellulose solution is 1-5wt%, the mass ratio of cellulose to graphene in the cellulose/graphene composite solution is 1:0.8-1.2, the mass concentration of cellulose is 1-5wt%, and the solvent of the cellulose solution and the cellulose/graphene composite solution is ionic liquid.
2. 2. The preparation method of claim 1, wherein the wire pushing flow rate of the syringe is 8-15 mL/min, and the diameter of the syringe needle is 0.5-1 mm.
3. 3. The preparation method according to claim 1, wherein the ionic liquid is selected from any one of 1-allyl-3-methylimidazole chloride, 1-propyl-3-methyl-imidazole chloride, 1-butyl-3-methyl-imidazole chloride or 1-ethyl-3-methylimidazole chloride.
4. 4. The method according to claim 1, further comprising the step of immersing the regenerated cellulose filaments and cellulose/graphene composite filaments obtained in water for 20-30 hours and then vacuum-drying at 60-90 ℃.
5. 5. The method according to claim 1, wherein in the step B), the width of the deposit is 8 to 15 mm and the thickness of the deposit is 0.2 to 1 mm.
6. 6. The method according to claim 1, wherein the concentration of the polyvinyl alcohol solution in the step B) and the step C) is 5 to 15wt%, the solvent of the polyvinyl alcohol solution is water, and the drying in the step B) and the step C) is preferably vacuum drying, the drying temperature is 60 to 90 ℃ and the drying time is 2 to 5 hours.
7. 7. The method according to claim 1, wherein in the step C), the regenerated cellulose film is prepared by scraping a cellulose solution, immersing in water, and drying.
8. 8. The method according to claim 1, wherein in the step C), a polyvinyl alcohol solution is brushed on one surface of the regenerated cellulose film, and then the semi-finished product of the packing belt is coated on one surface of the regenerated cellulose film by brushing the polyvinyl alcohol solution, wherein the packing is tightly packed, and the number of the packing layers is 1-3.
9. 9. The regenerated cellulose-based high-strength conductive composite packing belt obtained by the preparation method according to any one of claims 1 to 8.

Description

Regenerated cellulose-based high-strength conductive composite packing belt and preparation method thereof Technical Field The invention relates to the technical field of cellulose-based composite materials, in particular to a regenerated cellulose-based high-strength conductive composite packaging belt and a preparation method thereof. Background The information disclosed in the background of the invention is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an admission or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. The packing belt is used as a common packing material, is mainly used for packing boxes, transporting goods and the like, and is generally prepared by mixing polypropylene and polyester two plastics at present, however, the two plastics belong to derivatives of petroleum-based products, and have the defects of nondegradability, environmental pollution, difficult recovery and the like, so that the development of the packing belt in the field of green packaging is hindered to a certain extent. Therefore, there is an urgent need to develop a green and renewable high performance strapping tape. Cellulose is a natural high molecular compound which is cheap and easy to obtain, green, renewable and biodegradable, is insoluble in common organic and inorganic solutions, and ionic liquid can directly and physically dissolve cellulose without changing the inherent molecular structure of cellulose and retaining the functional groups of cellulose, and the obtained regenerated cellulose solution has fluidity and plasticity and can be cast into various structures and shapes by using a model tool. In order to endow the regenerated cellulose material with new functional characteristics, various functional fillers are often added into the regenerated cellulose solution in the prior art, and the addition of the fillers may affect the mechanical properties of the regenerated cellulose material. The packing belt needs to have high strength to ensure the reliability of use, and on the other hand, if the humidity change of the environment where the packing belt is positioned and the condition of external force can be monitored by using the detection equipment in real time, the economic loss caused by the environment which is unfavorable for storing and transporting the packaged goods can be effectively reduced, and the realization of the real-time monitoring needs to have good conductivity and environmental sensitivity. Therefore, how to provide a packaging tape that has high strength, good conductivity, good environmental sensitivity and biodegradability is a problem to be solved. Disclosure of Invention In view of the above, the invention provides a regenerated cellulose-based high-strength conductive composite packing belt and a preparation method thereof, wherein the composite packing belt has good water resistance, biodegradability, conductivity and mechanical property, and has high sensitivity to water and force action induction. In a first aspect, the invention provides a method for preparing a regenerated cellulose-based high-strength conductive composite packing belt, which comprises the following steps: A) Injecting cellulose solution and cellulose/graphene composite solution into different syringes respectively, and completely immersing a syringe needle into water to push wires so as to prepare regenerated cellulose wires and regenerated cellulose/graphene composite wires; B) Uniformly laying the regenerated cellulose filaments and the regenerated cellulose/graphene composite filaments after mixing, uniformly casting with a polyvinyl alcohol solution, and then drying to obtain a semi-finished product of the packing belt; c) Coating the regenerated cellulose film with polyvinyl alcohol solution, wrapping the semi-finished product of the packing belt, and drying to obtain the product. In a second aspect, the invention provides the regenerated cellulose-based high-strength conductive composite packing belt obtained by the preparation method. Compared with the prior art, the invention has the following beneficial effects: The preparation method provided by the invention is simple, the cost of raw materials and equipment is low, the environment-friendly degradable packing belt with good mechanical property, water resistance and conductivity can be prepared, the environment-friendly degradable packing belt is sensitive to environmental humidity change and the degree of external force reaction, can be used for real-time environment monitoring, and has a wide application prospect. Drawings The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. It will be o