Preparation method of degradable wood-plastic composite material

A technology of wood-plastic composite materials and composite materials, which is applied in the field of composite material preparation, can solve problems such as lack of reports, and achieve the effects of low cost, improved dispersion, and low degradation performance

Active Publication Date: 2017-10-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are currently few reports on

Method used

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  • Preparation method of degradable wood-plastic composite material
  • Preparation method of degradable wood-plastic composite material

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preparation example Construction

[0032] A preparation method of degradable wood-plastic composite material, comprising the following steps:

[0033] Preparation of surface modifier: Weigh the biomass and dissolve it in an organic solvent to form a biomass solution, drop an esterification reagent into the biomass solution for esterification reaction, and after the esterification reaction, precipitate and separate with absolute ethanol in turn, Obtain the surface modifier after washing with water ethanol and centrifuging;

[0034] The preparation steps of the surface modifier are specifically:

[0035] Step 1): Weigh the biomass, and then dissolve it in an organic solvent to obtain a biomass solution;

[0036] Wherein, biomass is one of starch, lignin or cellulose and derivatives thereof.

[0037] Step 2): The biomass solution is placed in a three-necked flask equipped with a stirrer, a reflux condenser and a constant pressure dropper respectively, and the three-necked flask is placed in a constant temperatur...

Embodiment 1

[0051] In this embodiment, the preparation method of the degradable wood-plastic composite material specifically includes the following steps:

[0052] (1) Preparation of surface modifier:

[0053] Step 1): Weigh 5.0g of starch and dissolve it in 100mL of dimethyl sulfoxide to obtain a solution;

[0054] Step 2): The above solution was placed in a three-neck flask equipped with a stirrer, a reflux condenser and a constant pressure dropper respectively, and placed in a constant temperature oil bath at 105°C.

[0055] Step 3): Add octanoyl chloride dropwise to it with a constant pressure dropping funnel, and the dropwise addition is completed within 15 minutes.

[0056] Wherein, the addition amount of octanoyl chloride is, the molar ratio of octanoyl chloride:starch=1:1, and the time of the whole esterification reaction is 3h.

[0057] Step 4): After the reaction is completed, add 500 mL of absolute ethanol to it for precipitation and separation, and wash with absolute ethanol...

Embodiment 2

[0071] In this embodiment, the preparation method of the degradable wood-plastic composite material specifically includes the following steps:

[0072] (1) Preparation of surface modifier:

[0073] Step 1): Weigh 5.0g lignin and dissolve it in 100mL dimethyl sulfoxide;

[0074] Step 2): Put the lignin dissolved in dimethyl sulfoxide in a three-necked flask equipped with a stirrer, a reflux condenser and a constant pressure dropper respectively, and place it in a constant temperature oil bath at 105°C.

[0075] Step 3): Add palmitoyl chloride dropwise to it with a constant pressure dropping funnel, and the dropwise addition is completed within 15 minutes.

[0076] Wherein, the mass ratio of palmitoyl chloride: lignin is 1:1, and the whole esterification reaction time is 3h.

[0077] Step 4): After the reaction is completed, add 500mL of absolute ethanol to it for precipitation and separation, wash with absolute ethanol several times, and then centrifuge with a centrifuge at 2...

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Abstract

The invention discloses a preparation method of a degradable wood-plastic composite material, and belongs to the technical field of preparation of composite materials. The preparation method comprises the following steps: preparation of a surface modifying agent, surface modification of plant fibers, preparation of a flame retardant and preparation of the composite material. The composite material has excellent flame-retardant property and mechanical property, influence on the degrading property of the composite material is small, the cost is low, and batched, continuous and large-scale industrial production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and specifically relates to a method for preparing a degradable flame-retardant aliphatic polyester composite material by combining surface-modified plant fibers with a modified flame retardant. Background technique [0002] With the development of social economy, the energy crisis is becoming increasingly tense, white pollution is becoming more and more serious, and human beings' awareness of environmental protection and sustainable development is gradually increasing. Therefore, environmentally friendly composite materials have also emerged. In particular, it has become an important task to prepare degradable, high-performance, and environmentally friendly wood-plastic composite materials by combining natural plant fiber raw materials with biodegradable resins. [0003] Aliphatic polyester (such as: PBS, PLA, PCL, etc.) is a commercialized polymer material with excellent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L97/02C08K9/04C08K9/06C08K7/08D06M15/11D06M15/01C08B31/04C08H7/00D06M15/07C08B3/10D06M101/06
CPCC08B3/10C08B31/04C08H6/00C08L67/02C08L67/04C08L2201/02C08L2201/06C08L2205/16D06M15/01D06M15/07D06M15/11D06M2101/06C08L97/02C08K9/04C08K7/08C08K9/06
Inventor 岳小鹏蔺奕存徐悦灵刘鹏杰
Owner SHAANXI UNIV OF SCI & TECH
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