Preparation method of sisal hemp cellulose nanowhisker/polylactic acid biological composite material

A technology of nano-whiskers and composite materials, which is applied in the field of preparation of sisal cellulose nano-whiskers/polylactic acid biocomposites, can solve the problems that have not been reported in the literature, and achieve simple preparation process, excellent mechanical properties and biophase capacitive effect

Active Publication Date: 2015-01-21
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This idea has not been reported in the literature

Method used

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  • Preparation method of sisal hemp cellulose nanowhisker/polylactic acid biological composite material
  • Preparation method of sisal hemp cellulose nanowhisker/polylactic acid biological composite material

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Embodiment 1

[0016] (1) Mix the sisal cellulose nano-whiskers with the purified L-lactide monomer in a molar ratio and place them in a pretreated ampoule for subsequent use; the purified L-lactide The monomer is prepared by distillation of lactic acid under reduced pressure; the mixing molar ratio of the sisal cellulose nano whiskers and the purified L-lactide monomer is 1:99; the pretreatment process of the ampoule is at 400 °C for 2 hours, then cooled to room temperature under vacuum.

[0017] (2) initiator stannous octoate is added in the standby ampoule bottle of step (1), then vacuumizes, and the pressure in the ampoule bottle bottle is down to 0.8Pa, and the ampoule bottle is sealed with an alcohol blowtorch; The ratio of the amount of tin to the purified L-lactide monomer used in step (1) is 1:12000.

[0018] (3) Place the ampoule packaged in step (2) in a constant temperature drying oven at 122°C. After the purified L-lactide monomer has completely melted, shake the ampoule up and...

Embodiment 2

[0021] (1) Mix the sisal cellulose nano-whiskers with the purified L-lactide monomer in a molar ratio and place them in a pretreated ampoule for subsequent use; the purified L-lactide The monomer is prepared by distillation of lactic acid under reduced pressure; the mixing molar ratio of the sisal cellulose nano whiskers and the purified L-lactide monomer is 1:19; the pretreatment process of the ampoule is at 400 °C for 2 hours, then cooled to room temperature under vacuum.

[0022] (2) initiator stannous octoate is added in the standby ampoule bottle of step (1), then vacuumizes, and the pressure in the ampoule bottle bottle is down to 0.9Pa, and the ampoule bottle is sealed with an alcohol blowtorch; The ratio of the amount of tin to the purified L-lactide monomer used in step (1) is 1:12000.

[0023] (3) Place the ampoule packaged in step (2) in a constant temperature drying oven at 120°C. After the purified L-lactide monomer has completely melted, shake the ampoule up and...

Embodiment 3

[0026] (1) Mix the sisal cellulose nano-whiskers with the purified L-lactide monomer in a molar ratio and place them in a pretreated ampoule for subsequent use; the purified L-lactide The monomer is prepared by distillation of lactic acid under reduced pressure; the mixing molar ratio of the sisal cellulose nano whiskers and the purified L-lactide monomer is 1:9; the pretreatment process of the ampoule is at 400 °C for 2 hours, then cooled to room temperature under vacuum.

[0027] (2) initiator stannous octoate is added in the standby ampoule bottle of step (1), then vacuumizes, and the pressure in the ampoule bottle bottle is down to 0.7Pa, and the ampoule bottle is sealed with an alcohol blowtorch; The ratio of the amount of tin to the purified L-lactide monomer used in step (1) is 1:12000.

[0028] (3) Place the ampoule packaged in step (2) in a constant temperature drying oven at 125°C. After the purified L-lactide monomer has completely melted, shake the ampoule up and ...

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Abstract

The invention discloses a preparation method of a sisal hemp cellulose nanowhisker/polylactic acid biological composite material. The preparation method comprises the following steps: grafting a polylactic oligomer on the surface of the sisal hemp cellulose nanowhisker through adopting a grafting treatment method; and forming good interfacial adhesion by means of compatibility between the polylactic oligomer which is grafted on the surface of the sisal hemp cellulose nanowhisker and polylactic acid and preparing the sisal hemp cellulose nanowhisker/polylactic acid biological composite material by adopting an in-situ composite technique. The preparation method disclosed by the invention is simple in preparation process and green and environmental friendly, and the prepared sisal hemp cellulose nanowhisker/polylactic acid biological composite material has excellent mechanical properties and biocompatibility.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, in particular to a preparation method of sisal cellulose nano-whiskers / polylactic acid biocomposite material. The method utilizes the good compatibility and interfacial bonding between polylactic acid oligomers grafted with sisal cellulose nanowhiskers and polylactic acid, and adopts in-situ composite technology to prepare nano-whiskers with excellent mechanical properties, degradation properties and biocompatibility. Sisal cellulose nanowhiskers / polylactic acid biocomposite. Background technique [0002] After the poly-L-lactic acid (PLLA) is implanted in the body as a bone graft substitute material, as the bone trauma gradually heals, it can gradually degrade through the hydrolysis of the ester bond, and finally decompose into water and carbon dioxide, which can be absorbed or excreted by the human body without secondary It can be removed in one operation, which simplifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/08C08B15/00
Inventor 樊新刘铮杨哲伟
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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