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US-20260125522-A1 - NANOCAPSULE-BASED THERMAL INSULATION FUNCTIONAL MASTERBATCH AND PREPARATION METHOD THEREOF

US20260125522A1US 20260125522 A1US20260125522 A1US 20260125522A1US-20260125522-A1

Abstract

A nanocapsule-based thermal insulation functional masterbatch and a preparation method thereof are provided. The nanocapsule-based thermal insulation functional masterbatch is prepared by mixing a polymer substrate, an organic-inorganic composite nanocapsule, and an auxiliary agent to allow granulation, where the nanocapsule is added at 1 wt % to 20 wt % and the auxiliary agent is added at 0.2 wt % to 0.5 wt % by weight percentage, while the polymer substrate is added as a balance. The nanocapsule is prepared by emulsification prepolymerization, polymerization, and nano-compounding. Compared with general thermal insulation functional masterbatch, the nanocapsule-based thermal insulation functional masterbatch shows outstanding stability, higher thermal insulation, and excellent thermal insulation performance.

Inventors

  • Jiayi Li
  • Jiaxiao XUE

Assignees

  • SHANGHAI HUZHENG INDUSTRY CO., LTD

Dates

Publication Date
20260507
Application Date
20240415
Priority Date
20240110

Claims (18)

  1. 1 . A nanocapsule, wherein the nanocapsule is a nanoscale thermal insulation material formed by organically compounding a nanoscale tungsten-doped oxide and an alcohol-acid composite crystal; and a preparation method of the nanocapsule comprises the following steps: (1) according to parts by mass, dissolving 0.5 parts to 1 part of sodium dodecyl sulfate (SDS) in 50 parts to 80 parts of deionized water to obtain a solution A; mixing 5 parts to 8 parts of methyl methacrylate (MMA), 1 part to 2 parts of ethyl acrylate (EA), 8 parts to 15 parts of the alcohol-acid composite crystal, and 0.1 parts to 0.2 parts of azobisisobutyronitrile (AIBN) ultrasonically for 5 min to 10 min to obtain a solution B; adding the solution B dropwise into the solution A, and then stirring at 20° C. to 40° C. for 5 min to 30 min to obtain an emulsion C; and stirring the emulsion C to allow a reaction at 75° C. to 85° C. for 0.5 h to 1.5 h; (2) dissolving 1 part to 2 parts of the SDS and 1 part to 5 parts of hydroxyethyl methacrylate (HEMA) in 120 parts to 150 parts of the deionized water to obtain a solution D; mixing 7 parts to 10 parts of the MMA, 2 parts to 3 parts of pentaerythritol tetraacrylate (PETTA), and 0.1 parts to 0.3 parts of the AIBN ultrasonically to allow dispersion for 5 min to 15 min to obtain a solution E; adding the solution E dropwise into the solution D, and then stirring at 20° C. to 40° C. for 5 min to 30 min to obtain an emulsion F; and adding the emulsion F into the emulsion C, and then conducting a reaction at 75° C. to 85° C. for 5 h to 10 h to obtain a polymer solution; (3) dispersing 5 parts to 10 parts of the nanoscale tungsten-doped oxide and 0.1 parts to 0.5 parts of polyvinylpyrrolidone (PVP) in 50 parts to 100 parts of the deionized water, adjusting an obtained solution to a pH value of 5.5 to 6.5 with hydrochloric acid, conducting an ultrasonic treatment for 0.5 h to 1 h, and then conducting washing, filtering, and drying; mixing an obtained dried material and 1 part to 2 parts of the SDS in 30 parts to 50 parts of the deionized water, and then conducting an ultrasonic treatment for 10 min to 30 min to obtain a dispersion G; and adding the dispersion G dropwise into the polymer solution obtained in step (2), and then stirring until a uniform liquid phase is formed; and (4) adding 2 parts to 5 parts of a silane emulsion into the uniform liquid phase obtained in step (3), stirring to allow a reaction at 40° C. to 50° C. for 1 h to 2 h, and then subjecting an obtained reaction solution to suction filtration, repeated washing, and vacuum drying for 24 h to 48 h to obtain the nanocapsule.
  2. 2 . A nanocapsule-based thermal insulation functional masterbatch, wherein the nanocapsule-based thermal insulation functional masterbatch is prepared by mixing a plastic substrate, the nanocapsule according to claim 1 , and an auxiliary agent to allow granulation, the nanocapsule is added at 1 wt % to 20 wt % of the nanocapsule-based thermal insulation functional masterbatch, and the auxiliary agent is added at 0.2 wt % to 0.5 wt % of the nanocapsule-based thermal insulation functional masterbatch.
  3. 3 . The nanocapsule-based thermal insulation functional masterbatch according to claim 2 , wherein the alcohol-acid composite crystal in step (1) is one selected from the group consisting of a lauric acid/tetradecanol composite crystal and a tetradecanoic acid/heptadecanol composite crystal, has an alcohol-to-acid molar ratio of 1:1, and is prepared by co-melting recrystallization.
  4. 4 . The nanocapsule-based thermal insulation functional masterbatch according to claim 2 , wherein the adding dropwise in steps (1) and (2) is conducted at 1 mL/min to 3 mL/min.
  5. 5 . The nanocapsule-based thermal insulation functional masterbatch according to claim 2 , wherein the adding dropwise in step (3) is conducted at 3 mL/min to 5 mL/min.
  6. 6 . The nanocapsule-based thermal insulation functional masterbatch according to claim 2 , wherein the silane emulsion in step (4) is prepared by uniformly mixing Tween-40, KH-460, and deionized water at a mass ratio of 3:50:80.
  7. 7 . The nanocapsule-based thermal insulation functional masterbatch according to claim 2 , wherein the plastic substrate is selected from the group consisting of polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), polyethylene terephthalate (PETTA), polystyrene (PS), and polycarbonate (PC).
  8. 8 . The nanocapsule-based thermal insulation functional masterbatch according to claim 2 , wherein the auxiliary agent is a complex of ethylene glycol polyoxyethylene ether, γ-aminopropyl triethoxysilane, and pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate).
  9. 9 . The nanocapsule-based thermal insulation functional masterbatch according to claim 2 , wherein the nanocapsule is added at 10 wt % of the nanocapsule-based thermal insulation functional masterbatch.
  10. 10 . A thermal insulation functional film, comprising the following raw materials by mass fraction: 5% of the nanocapsule-based thermal insulation functional masterbatch according to claim 2 and a substrate masterbatch as a balance.
  11. 11 . The nanocapsule-based thermal insulation functional masterbatch according to claim 7 , wherein the auxiliary agent is a complex of ethylene glycol polyoxyethylene ether, γ-aminopropyl triethoxysilane, and pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate).
  12. 12 . The thermal insulation functional film according to claim 10 , wherein the alcohol-acid composite crystal in step (1) is one selected from the group consisting of a lauric acid/tetradecanol composite crystal and a tetradecanoic acid/heptadecanol composite crystal, has an alcohol-to-acid molar ratio of 1:1, and is prepared by co-melting recrystallization.
  13. 13 . The thermal insulation functional film according to claim 10 , wherein the adding dropwise in steps (1) and (2) is conducted at 1 mL/min to 3 mL/min.
  14. 14 . The thermal insulation functional film according to claim 10 , wherein the adding dropwise in step (3) is conducted at 3 mL/min to 5 mL/min.
  15. 15 . The thermal insulation functional film according to claim 10 , wherein the silane emulsion in step (4) is prepared by uniformly mixing Tween-40, KH-460, and deionized water at a mass ratio of 3:50:80.
  16. 16 . The thermal insulation functional film according to claim 10 , wherein the plastic substrate is selected from the group consisting of polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), polyethylene terephthalate (PETTA), polystyrene (PS), and polycarbonate (PC).
  17. 17 . The thermal insulation functional film according to claim 10 , wherein the auxiliary agent is a complex of ethylene glycol polyoxyethylene ether, γ-aminopropyl triethoxysilane, and pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate).
  18. 18 . The thermal insulation functional film according to claim 10 , wherein the nanocapsule is added at 10 wt % of the nanocapsule-based thermal insulation functional masterbatch.

Description

The present application claims priority to Chinese Patent Application No. CN202410033638.9 filed to the China National Intellectual Property Administration (CNIPA) on Jan. 10, 2024 and entitled “NANOCAPSULE-BASED THERMAL INSULATION FUNCTIONAL MASTERBATCH AND PREPARATION METHOD THEREOF”, which is incorporated herein by reference in its entirety. TECHNICAL FIELD The present disclosure relates to the technical field of nanomaterials, and in particular to a nanocapsule-based thermal insulation functional masterbatch and a preparation method thereof. BACKGROUND Thermal insulation functional masterbatch can be used to prepare thermal insulation functional films, sheets and other plastic materials, and plays an important role in many fields such as construction and automobiles. General thermal insulation functional masterbatch only shows simple thermal insulation function, and there is still much room for improvement in thermal insulation, energy storage, and heat preservation. Chinese patent CN114752142B has disclosed a transparent thermal insulation masterbatch based on a cesium tungsten oxide system. By modifying a nano-cesium tungsten oxide to form a polymer segment containing ester bonds, a HALS-g-EVA/PVB-g-Cs0.33WO3 composite is obtained through ester exchange, thus achieving thermal insulation and blue light protection functions. Based on a general inorganic thermal insulation masterbatch, aging resistance and blue light protection are improved through modified compounding while the thermal insulation performance is not improved on the transparent thermal insulation masterbatch. Chinese patent CN108530843B has announced a thermal insulation masterbatch for BOPET window film. A thermal insulation material is a composition with a core-inner shell-outer shell structure that is composed of nanoscale carbonized cellulose, titanium dioxide, and polyacrylamide, achieving thermal insulation function through heat absorption of the inner core and reflectivity of the inner shell. However, the above thermal insulation masterbatch is mainly used in the BOPET window film, and no further improvement is made in terms of thermal insulation and other functionalities. SUMMARY In view of the above-mentioned deficiencies in the prior art, according to the examples of the present disclosure, it is hoped to provide a functional masterbatch with high-efficiency and long-term thermal insulation, energy storage, and heat preservation functions, so as to achieve the improvement of functionality and the expansion of applications. According to an example, the present disclosure provides a nanocapsule-based thermal insulation functional masterbatch, where the nanocapsule-based thermal insulation functional masterbatch is prepared by mixing a plastic substrate, a nanocapsule, and an auxiliary agent to allow granulation, the nanocapsule is added at 1 wt % to 20 wt % of the nanocapsule-based thermal insulation functional masterbatch, and the auxiliary agent is added at 0.2 wt % to 0.5 wt % of the nanocapsule-based thermal insulation functional masterbatch. The plastic substrate is selected from the group consisting of polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), polyethylene terephthalate (PETTA), polystyrene (PS), and polycarbonate (PC). The nanocapsule is a nanoscale thermal insulation material formed by organically compounding a nanoscale tungsten-doped oxide and an alcohol-acid composite crystal. The auxiliary agent is a complex of ethylene glycol polyoxyethylene ether, γ-aminopropyl triethoxysilane, and pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate). According to an example, a preparation method of the nanocapsule includes the following steps: (1) according to parts by mass, dissolving 0.5 parts to 1 part of sodium dodecyl sulfate (SDS) in 50 parts to 80 parts of deionized water to obtain a solution A; mixing 5 parts to 8 parts of methyl methacrylate (MMA), 1 part to 2 parts of ethyl acrylate (EA), 8 parts to 15 parts of the alcohol-acid composite crystal, and 0.1 parts to 0.2 parts of azobisisobutyronitrile (AIBN) ultrasonically for 5 min to 10 min to obtain a solution B; adding the solution B dropwise into the solution A, and then stirring at 20° C. to 40° C. for 5 min to 30 min to obtain an emulsion C; and stirring the emulsion C to allow a reaction at 75° C. to 85° C. for 0.5 h to 1.5 h;(2) dissolving 1 part to 2 parts of the SDS and 1 part to 5 parts of hydroxyethyl methacrylate (HEMA) in 120 parts to 150 parts of the deionized water to obtain a solution D; mixing 7 parts to 10 parts of the MMA, 2 parts to 3 parts of pentaerythritol tetraacrylate (PETTA), and 0.1 parts to 0.3 parts of the AIBN ultrasonically to allow dispersion for 5 min to 15 min to obtain a solution E; adding the solution E dropwise into the solution D, and then stirring at 20° C. to 40° C. for 5 min to 30 min to obtain an emulsion F; and adding the emulsion F into the emulsion C, a