Method for preparing cotton swab stick material from montmorillonite-composite modified straw fiber powder-polylactic acid

A technology of straw fiber powder and composite modification, applied in the field of daily necessities, can solve the problems of limited development, poor toughness, poor thermal stability of polylactic acid, etc., achieve good toughening effect, large interlayer distance, and improve thermal stability and mechanical properties Effect

Inactive Publication Date: 2019-03-26
蚌埠尚岛宜家日用品科技工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polylactic acid has poor thermal stability and poor toughness, which limits its development in the market. It is modified by reactive montmorillonite. Due to the strong interaction between reactive montmorillonite and pol

Method used

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  • Method for preparing cotton swab stick material from montmorillonite-composite modified straw fiber powder-polylactic acid

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Effect test

Embodiment 1

[0021] A method for preparing a cotton swab material with montmorillonite-composite modified straw fiber powder-polylactic acid, characterized in that it comprises the following steps:

[0022] (1) Organicization of sodium montmorillonite:

[0023] Add deionized water to 4 parts of sodium montmorillonite at a ratio of 1:30, stir mechanically for 1 hour, raise the temperature to 70-75°C, add dilute hydrochloric acid solution dropwise to adjust the pH of the suspension to 6; mix 0.5 parts of surfactant and isopropyl Make an aqueous solution of alcohol, add it dropwise to the suspension under stirring, keep it warm for 25 minutes, then ultrasonically react it at 80-85°C for 10 minutes, let it stand to cool down, filter it with suction, and wash it repeatedly with ethanol aqueous solution until there is no bromide ion. Dry to constant weight in a vacuum drying oven at ℃, grind and pass through a 200-mesh sieve to prepare reactive montmorillonite;

[0024] (2) Alkali-coupling agen...

Embodiment 2

[0033] A method for preparing a cotton swab material with montmorillonite-composite modified straw fiber powder-polylactic acid, characterized in that it comprises the following steps:

[0034] (1) Organicization of sodium montmorillonite:

[0035] Add deionized water to 6 parts of sodium montmorillonite at a ratio of 1:35, stir mechanically for 2 hours, raise the temperature to 75°C, add dilute hydrochloric acid solution dropwise to adjust the pH of the suspension to 6; prepare 1 part of surfactant and isopropanol Form an aqueous solution, add it dropwise to the suspension under stirring, keep it warm for 35 minutes, then ultrasonically react at 80-85°C for 15 minutes, let it stand to cool down, filter with suction, wash repeatedly with ethanol aqueous solution until there is no bromide ion, vacuum at 40-50°C Dried in a drying oven to constant weight, ground and passed through a 200-mesh sieve to obtain reactive montmorillonite;

[0036] (2) Alkali-coupling agent composite m...

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Abstract

The invention discloses a method for preparing a cotton swab stick material from montmorillonite-composite modified straw fiber powder-polylactic acid. The method comprises the following steps: dryingpowdery polylactic acid in a drying box; adding the dried polylactic acid, reactive montmorillonite, straw fiber powder subjected to alkali-coupling agent composite modification treatment and a toughening agent, maleic anhydride grafted polylactic acid, a silane coupling agent, zinc stearate, a plasticizer, a lubricant and a foaming agent into a high-speed mixing mill and mixing; adding into a mold and putting the mold on a heated plate vulcanizing machine; carrying out mold pressing and molding; and after the mold is cooled, taking out to prepare the cotton swab stick material. A cation exchange principle is utilized, and 3-chloro-2 hydroxypropyl trimethyl ammonium bromide is used for carrying out organic modification on sodium-based montmorillonite to prepare the reactive montmorillonite; the modified montmorillonite is high in organic adsorption amount and large in lamellar spacing; and the reactive montmorillonite has a stripping state and also has an intercalation state in a polylactic acid matrix, and has a good modification effect on the polylactic acid, so that the thermal stability and mechanical properties of the polylactic acid can be improved.

Description

technical field [0001] The invention belongs to the field of daily necessities, and in particular relates to a method for preparing a cotton swab material by using montmorillonite-compound modified straw fiber powder-polylactic acid. Background technique [0002] Polylactic acid, derived from nature and returned to nature, is a non-polluting, degradable and renewable biomaterial that can meet human needs for an environmentally friendly and sustainable economy. However, polylactic acid has poor thermal stability and poor toughness, which limits its development in the market. It is modified by reactive montmorillonite. Due to the strong interaction between reactive montmorillonite and polylactic acid, the improvement Its compatibility with polylactic acid and its dispersibility in the polylactic acid matrix can improve the thermal stability of polylactic acid without affecting other properties. It is of great significance to the application of polylactic acid in disposable pro...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L51/08C08L67/02C08K13/06C08K9/04C08K3/34C08K5/098C08K5/12C08J9/10
CPCC08J9/103C08J9/0023C08J9/0061C08J9/0085C08J9/009C08J9/0095C08J2203/04C08J2367/04C08J2451/08C08J2467/02
Inventor 王丹袁志杰
Owner 蚌埠尚岛宜家日用品科技工业有限公司
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