Biodegradable microcapsule cold storage agent and preparation method thereof

A cold storage agent and microcapsule technology, applied in the field of biodegradable microcapsule cold storage agent and its preparation, can solve the problems of low coating rate of hydrophilic substances, poor impact resistance, low mechanical strength, etc., and reach the phase transition temperature The effect of wide range, good sealing, and high latent heat of phase change

Active Publication Date: 2019-09-06
武汉中科先进材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simple polylactic acid capsules have disadvantages such as poor hydrophilicity, low coating rate for hydrophilic substances, low mechanical strength, and poor impact resistance.
The patent "Polyemulsion-Polyethylene Glycol-coated Florfenicol Nanofibers and Its Preparation Method" improved its hydrophilicity by modifying the polylactic acid capsule material, but due to the defects of the solvent evaporation method used, the hydrophilicity Water-based substances are also difficult to successfully coat with this method

Method used

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  • Biodegradable microcapsule cold storage agent and preparation method thereof
  • Biodegradable microcapsule cold storage agent and preparation method thereof
  • Biodegradable microcapsule cold storage agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1 Preparation of phase change cold storage core material

[0046] Add 15g of glycerin and 15g of NaCl into the three-necked flask, stir until uniform, continue to stir for 1h and then store.

Embodiment 2

[0047] The preparation of embodiment 2 core material emulsion

[0048] Take 12 g of the core material prepared in Example 1, mix it with 1.5 g of emulsifier, add it into 100 mL, stir and emulsify at a speed of 1000 r / min to obtain an emulsion.

Embodiment 3

[0049] The preparation of embodiment 3 polylactic acid prepolymer

[0050] According to the document "Changqing.Polym.Materials Sci.&Engineering [J], 1994,10 (1): 140-143. " method is synthesized lactide, is initiator with stannous octoate, initiates lactide ring-opening polymerization, the obtained After the polylactic acid prepolymer is purified, the average molecular weight measured by gel permeation chromatography is 4000.

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Abstract

The invention discloses a biodegradable microcapsule cold storage agent and a preparation method thereof. The cold storage agent comprises a novel capsule material of polylactic acid citrate and a composite phase change cold storage material as a core material formed by blending polyols and inorganic salts. In the invention, microcapsules are formed by interfacial polymerization of a polylactic acid monomer and a citric acid crosslinking agent. The adjustable phase change temperature range of the cold storage agent is -20 DEG C to 10 DEG C, the cold storage capacity is strong, the supercoolingdegree is small, the microcapsule sealing property is good, the strength is high, the core material is not easy to flow and leak, and the cold storage agent is nontoxic and harmless, biodegradable, economical and environment-friendly.

Description

technical field [0001] The invention belongs to the field of phase-change energy storage materials, and in particular relates to a biodegradable microcapsule cold storage agent and a preparation method thereof. Background technique [0002] Due to the increasing number of temperature-sensitive products, protecting products from heat damage during transportation has become an important issue in today's society. Temperature-controlled packaging technology can keep products within a reasonable temperature range and slow down product deterioration during transportation. Coolant plays a key role in maintaining a stable temperature inside the package. [0003] Cold storage agent is usually a viscous jelly mixture composed of organic or (and) inorganic compounds, which can absorb and store a large amount of cold energy at low temperatures, and can release a large amount of cold energy at higher temperatures, which can be used for a longer period of time. Maintain a low temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/16
CPCB01J13/16C09K5/06
Inventor 喻学锋吴列康翼鸿黄浩
Owner 武汉中科先进材料科技有限公司
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