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CN-121975246-A - High-performance polyvinyl chloride material and preparation method thereof

CN121975246ACN 121975246 ACN121975246 ACN 121975246ACN-121975246-A

Abstract

The application relates to the field of polyvinyl chloride materials, and particularly discloses a high-performance polyvinyl chloride material and a preparation method thereof. A high-performance polyvinyl chloride material is prepared from polyvinyl chloride resin powder (50-60 wt.%), high-efficiency heat stabilizer (2-4), environment-friendly plasticizer (25-35), filler (4-7), lubricant (1-3) and toner (1-2), through adding bentonite and hexadecyl trimethyl ammonium chloride to water, reflux stirring, washing, drying, sieving to obtain organic modified bentonite, mixing NaOH and Na 2 CO 3 to obtain mixed liquid, adding Al (NO 3 ) 3 ・9H 2 O and NH 4 F) to water, adding acidified CNTs and organic modified bentonite, adding mixed liquid, hydrothermal reaction, cooling, centrifuging, washing and drying.

Inventors

  • HUAN ZAIPENG
  • ZHAO YANJU
  • WANG CHANGZENG

Assignees

  • 山东华鹏高分子材料有限公司

Dates

Publication Date
20260505
Application Date
20260210

Claims (8)

  1. 1. The high-performance polyvinyl chloride material is characterized by comprising, by mass, 50-60% of polyvinyl chloride resin powder, 2-4% of a high-efficiency heat stabilizer, 25-35% of an environment-friendly plasticizer, 4-7% of a filler, 1-3% of a lubricant and 1-2% of a toner; The preparation method of the high-efficiency heat stabilizer comprises the following steps: (1) Adding bentonite and hexadecyl trimethyl ammonium chloride into water, refluxing and stirring for 2-2.5h at 70-75 ℃, washing, drying and sieving to obtain organic modified bentonite; (2) Mixing NaOH and Na 2 CO 3 uniformly to obtain mixed solution; (3) Adding Al (NO 3 ) 3 ・9H 2 O and NH 4 F) into water, performing ultrasonic dispersion, adding acidified CNTs and organic modified bentonite, performing ultrasonic dispersion, adding a mixed solution in the stirring process, performing hydrothermal reaction for 12-14h at the pH value of 9-10 and 140-150 ℃, cooling, centrifuging, washing and drying to obtain the high-efficiency heat stabilizer.
  2. 2. The high performance polyvinyl chloride material according to claim 1, wherein the mass ratio of bentonite to CNTs is 2:0.5-0.7.
  3. 3. The high performance polyvinyl chloride material according to claim 1, wherein the preparation method of the environment-friendly plasticizer comprises the following steps: (1) Adding 1, 6-hexanediol into citric acid solution, heating to 170-175 ℃ in inert gas atmosphere, refluxing and stirring for 4-5h, and cooling to obtain a pre-product; (2) Uniformly mixing the epoxidized soybean oil and the pre-product, preheating for 10-15min at 140-150 ℃, adding sulfur, zinc oxide, stearic acid and tetrabenzyl thiuram disulfide, stirring for 40-60min at 155-160 ℃, cooling, centrifuging, washing and drying to obtain the environment-friendly plasticizer.
  4. 4. A high performance polyvinyl chloride material according to claim 3, wherein the mass ratio of epoxidized soybean oil to pre-product is 8-9:2-3.
  5. 5. The high performance polyvinyl chloride material according to claim 1, wherein the filler is selected from at least one of calcium carbonate, magnesium hydroxide, zinc borate, aluminum hydroxide, and kaolin.
  6. 6. The high performance polyvinyl chloride material according to claim 1, wherein the lubricant is selected from at least one of stearic acid and polyethylene wax.
  7. 7. The high performance polyvinyl chloride material of claim 1, wherein the toner is any one or more of fast scarlet BBN, permanent red 6B, phthalocyanine blue, and carbon black.
  8. 8. The method for preparing the high-performance polyvinyl chloride material according to any one of claims 1 to 7, comprising the following steps: Uniformly mixing polyvinyl chloride resin powder, an environment-friendly plasticizer, a high-efficiency heat stabilizer, a filler, a lubricant and a toner, carrying out melt extrusion, cooling, granulating and drying to obtain the high-performance polyvinyl chloride material, wherein the extrusion temperature is 160-175 ℃, and the screw speed is 150-220r/min during extrusion.

Description

High-performance polyvinyl chloride material and preparation method thereof Technical Field The application relates to the field of polyvinyl chloride materials, in particular to a high-performance polyvinyl chloride material and a preparation method thereof. Background Polyvinyl chloride (PVC for short) is the second most common synthetic plastic in the world, and has the characteristics of multifunction, low cost and high durability, thereby affecting a plurality of fields of construction, medical treatment, daily necessities and the like. The current market for PVC materials generally relies on phthalate-containing plasticizers which, while imparting good flexibility and processability to PVC materials, are subject to increasingly stringent restrictions due to their potential environmental and human health hazards. Meanwhile, the traditional PVC material has the defect of thermal stability, and is easy to decompose at high temperature to generate harmful substances. Therefore, a polyvinyl chloride material with excellent heat stability and good environmental protection performance is needed. Disclosure of Invention In order to improve the thermal stability and the environmental protection performance of the polyvinyl chloride material, the application provides a high-performance polyvinyl chloride material and a preparation method thereof. In a first aspect, the application provides a high-performance polyvinyl chloride material, which adopts the following technical scheme: the high-performance polyvinyl chloride material comprises, by mass, 50-60% of polyvinyl chloride resin powder, 2-4% of a high-efficiency heat stabilizer, 25-35% of an environment-friendly plasticizer, 4-7% of a filler, 1-3% of a lubricant and 1-2% of a toner; The preparation method of the high-efficiency heat stabilizer comprises the following steps: (1) Adding bentonite and hexadecyl trimethyl ammonium chloride into water, refluxing and stirring for 2-2.5h at 70-75 ℃, washing, drying and sieving to obtain organic modified bentonite; (2) Mixing NaOH and Na 2CO3 uniformly to obtain mixed solution; (3) Adding Al (NO 3)3・9H2 O and NH 4 F) into water, performing ultrasonic dispersion, adding acidified CNTs and organic modified bentonite, performing ultrasonic dispersion, adding a mixed solution in the stirring process, performing hydrothermal reaction for 12-14h at the pH value of 9-10 and 140-150 ℃, cooling, centrifuging, washing and drying to obtain the high-efficiency heat stabilizer. By adopting the technical scheme, the epoxy groups in the environment-friendly plasticizer capture initial HCl, the high-efficiency heat stabilizer provides long-acting neutralization through laminate alkalinity and anion reserve to form short-acting and long-acting double protection, self-catalytic circulation is blocked, the thermal stability of the polyvinyl chloride is improved, the nano sheet layer of the organic modified bentonite and CNTs enhance the barrier effect, the nano sheet layer and CNTs are mutually inserted with the micro-crosslinking structure of the plasticizer to jointly construct a compact and firm-interface composite material structure, the tensile strength and hardness of the polyvinyl chloride are obviously improved, the raw materials are environment-friendly, and the environment-friendly performance of the polyvinyl chloride material is improved. The modified bentonite is used as a cationic surfactant, inorganic cations such as Na +、Ca2+ among bentonite layers are replaced by ion exchange, the surface of bentonite is changed from strong hydrophilcity to hydrophobicity, long-chain alkyl of the modified bentonite and polyvinyl chloride molecular chains form hydrophobic interaction, weak electrostatic interaction is generated between the head of the cation and the polyvinyl chloride molecular chains, compatibility of the modified bentonite and a polyvinyl chloride matrix is remarkably improved, uneven thermal stabilization caused by agglomeration is avoided, strong interface interaction is formed between the modified bentonite and the acidified CNTs in the hydrothermal reaction process, the CNTs are used as a dispersion matrix to inhibit bentonite particle agglomeration, bentonite is promoted to be uniformly dispersed on the surface of the CNTs in a nano sheet form to form a unique hybridization structure, the hybridization structure formed by the CNTs and the bentonite can prevent heat conduction and gas diffusion, C-Cl bond breakage and HCl escape are delayed, further weakened degradation chain reaction is further generated, in addition, the hydroxide component generated by Al 3+ and NaOH and Na 2CO3 in the system reacts with HCl to generate chemical reaction, harmful HCl is converted into harmless products, the self-catalyzed degradation of polyvinyl chloride is blocked, the movement activity of the molecular chains at high temperature is further improved. Optionally, the mass ratio of the bentonite to the CNTs is 2:0.5-0.7. Opti