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Degradable composite material with lasting fragrance, preparation method and application thereof

A composite material and long-lasting technology, which is applied in the field of preparation and degradable composite materials, can solve the problems of easy precipitation, insufficient rigidity, uneven fragrance diffusion rate, etc., and achieve excellent mechanical properties, shorten migration path, and sufficient fragrance diffusion effect

Active Publication Date: 2022-02-01
WANHUA CHEMICAL (NINGBO) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the one hand, PBAT products are usually seldom used in injection molding. Due to its softness and insufficient rigidity, it is difficult to guarantee the strength of injection molded parts; Flavor components are mixed with plastic, and the distribution of flavor components is relatively random. The migration and volatilization of flavor embedded in the deep part of the material takes too long, even longer than the service life of the product, resulting in low utilization of flavor; most of the flavors are small molecular components Solid or liquid diffuses under the concentration gradient. If the addition amount is too high, it will cause serious surface precipitation in the early stage, which will affect the use, and the rate of fragrance diffusion will be uneven, the degree of fragrance will decrease rapidly, and the persistence will be insufficient, resulting in the fragrance effect of the material being affected. certain restrictions
[0004] CN113308094A proposes a degradable composite filling material, which uses natural essential oils as fragrance and antibacterial components and prepares degradable materials by direct blending. The preparation method is relatively simple, but the essential oils are liquid components, which have different physical properties from solid substrates Larger, it is difficult to mix evenly with a high-speed mixer, which may cause uneven distribution of the fragrance and antibacterial effect of the material, and it is difficult to ensure production stability; and the small molecule essential oil is directly filled into the matrix, which will cause it to easily separate out and have a poor fragrance retention effect

Method used

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  • Degradable composite material with lasting fragrance, preparation method and application thereof
  • Degradable composite material with lasting fragrance, preparation method and application thereof
  • Degradable composite material with lasting fragrance, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0053] [Preparation Example 1] Preparation of PLA porous microspheres A

[0054] Will NH 4 HCO 3 Add 50g / L to 125mL water to prepare an aqueous solution. This aqueous solution was added to a 400 mL chloroform solution containing 12.5 g of PLA, and emulsified into a main emulsifier. Pour the main emulsifier into 15L PVA aqueous solution containing 1g / L immediately to form a double emulsion, and stir at 25°C for 8h. A 170-mesh filter was used to separate the filtrate, and finally the obtained PLA porous microspheres A were washed three times with deionized water, and freeze-dried for future use. It can be seen from the test that the PLA porous microsphere A has an average particle diameter of 160 μm and a porosity of 77%.

Embodiment 2

[0055] [Preparation Example 2] Preparation of PLA Porous Microspheres B

[0056] Will NH 4 HCO 3 Add 30g / L to 125mL water to prepare an aqueous solution. This aqueous solution was added to 400 mL of ethyl acetate solution containing 5 g of PLA, and emulsified into a main emulsifier. Pour the main emulsifier into 15L of PVA aqueous solution containing 0.5g / L immediately to form a double emulsion, and stir at 25°C for 5h. A 170-mesh filter was used to separate the filtrate, and finally the obtained PLA porous microspheres A were washed three times with deionized water, and freeze-dried for future use. It can be seen from the test that the average particle diameter of the PLA porous microsphere A is 105 μm and the porosity is 34%.

Embodiment 3

[0057] [Preparation Example 3] Preparation of PLA Porous Microspheres C

[0058] Will NH 4 HCO 3 Add 70g / L to 125mL water to prepare an aqueous solution. This aqueous solution was added to 400 mL of dichloromethane solution containing 20 g of PLA, and emulsified into a main emulsifier. Pour the main emulsifier into 15L of 3g / L PVA aqueous solution immediately to form a double emulsion, and stir at 25°C for 5h. A 170-mesh filter was used to separate the filtrate, and finally the obtained PLA porous microspheres A were washed three times with deionized water, and freeze-dried for future use. It can be seen from the test that the average particle diameter of the PLA porous microsphere A is 570 μm and the porosity is 86%.

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Abstract

The invention discloses a degradable composite material with lasting fragrance as well as a preparation method and an application thereof. The degradable composite material is prepared from the following raw materials in parts by weight: 650 to 900 parts of PBAT, 50 to 200 parts of PLA porous microspheres embedded with essence, 50 to 300 parts of mineral powder and 1 to 10 parts of erucyl amide. According to the invention, PBAT is used as a matrix, and the PLA porous microsphere filler is dispersed in the matrix to form a special'island 'structure, so that the modulus of PBAT can be greatly improved on the premise of maintaining high toughness of PBAT. In addition, the hollow porous structure of the PLA porous microspheres can be used as a carrier of the essence to accommodate the essence, so that the essence stably exists in the composite material and is not easy to separate out, and the durability of the fragrance is kept.

Description

technical field [0001] The invention relates to a degradable composite material, in particular to a degradable composite material with long-lasting fragrance, a preparation method and application. Background technique [0002] In recent years, with the increasingly urgent demand for ecological environment protection and the continuous enhancement of people's awareness of environmental protection, degradable materials have gradually replaced traditional plastics in disposable products, and their market share has also increased day by day. Considering the continuous improvement of customers' requirements for material use experience and the improvement of mechanical properties of degradable plastic products, injection molded parts are required to have sufficient strength and durability during the service life. At the same time, functional fragrance applications have also begun to be developed. Among them, degradable plastics have natural advantages in disposable fragrance produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08K5/13C08K9/12C08K3/34C08K5/20
CPCC08L67/02C08L2201/06C08L67/04C08K5/13C08K9/12C08K3/34C08K5/20Y02W90/10
Inventor 马小涵王金祥顾永江荆彦宽
Owner WANHUA CHEMICAL (NINGBO) CO LTD
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