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Biodegradable polyester/cellulose nanocomposite and preparation method thereof

A technology of nanocomposite materials and biodegradable polyester, which is applied in the field of biodegradable polyester/cellulose nanocomposite materials and their preparation, polycaprolactone/cellulose nanocomposite materials and their preparation, and can solve the problems that cannot be achieved, etc. problem, achieve the effect of improving dispersion and improving mechanical properties

Inactive Publication Date: 2014-07-23
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nanoparticles are prone to agglomeration and phase separation in the polymer matrix, which cannot achieve the desired effect.

Method used

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  • Biodegradable polyester/cellulose nanocomposite and preparation method thereof
  • Biodegradable polyester/cellulose nanocomposite and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0019] Preparation of cellulose: Weigh a certain amount of cotton pulp, cut off the coarse powder, dissolve in water, and make starch milk of a certain concentration, then add 5% to 10% hydrochloric acid solution to acidify and heat up to 80°C to 90°C, mechanically Stir for 2h to 4h, sonicate for 0.5h to 1h, wash with deionized water twice, and filter under reduced pressure to obtain microcrystalline cellulose powder. On this basis, the microcrystalline cellulose is prepared by hydrolyzing the microcrystalline cellulose with 60%-70% sulfuric acid aqueous solution. Weigh a certain amount of microcrystalline cellulose and add it to 250mL of 60% to 70% sulfuric acid aqueous solution, stir at 50°C to 60°C for 2h to 5h, centrifuge the crude product suspension, wash until neutral, and filter under reduced pressure Dry to constant weight in a vacuum oven at 40°C.

[0020] Preparation of compatibilizer:

[0021] 1. Weigh 11.4g of dehydrated and dried caprolactone (moisture content2 ...

Embodiment 1

[0025] After mixing 2000g polycaprolactone (PCL), 4g cellulose and 0.4g compatibilizer COS-PCL, melt blending was carried out to obtain biodegradable polyester / cellulose nanocomposites. Made a standard sample, the properties of the composite material obtained through testing are shown in Table 1.

Embodiment 2

[0029] After mixing 2000g polycaprolactone (PCL), 10g cellulose and 1g compatibilizer COS-PCL, melt blending was carried out to obtain biodegradable polyester / cellulose nanocomposites. Made a standard sample, the properties of the composite material obtained through testing are shown in Table 1.

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Abstract

The invention provides a biodegradable polyester / cellulose nanocomposite and a preparation method thereof and in particular provides a compatibilizer modified polycaprolactone (PCL) / cellulose nanocomposite and a preparation method thereof. The compatibilizer can obviously improve dispersion of cellulose in PCL, thus improving the mechanical properties of the nanocomposite. The compatibilizer has biocompatibility and biodegradability, thus being favorable for the nanocomposite to be applied in the biomedicine. The method for preparing the nanocomposite by adopting melt blending is simple and convenient to operate, is simple in production process and easily achieves large-scale production.

Description

technical field [0001] The invention relates to a biodegradable polyester / cellulose nanocomposite material and a preparation method thereof, in particular to a compatibilizer-modified polycaprolactone / cellulose nanocomposite material and a preparation method thereof. The invention belongs to macromolecule field of materials technology. Background technique [0002] Polycaprolactone (PCL) is a polymer obtained by ring-opening polymerization of ε-CL in the presence of a specific catalyst by an initiator, and can be prepared by bulk polymerization or solution polymerization. As a degradable polyester material approved by the US Food and Drug Administration (PDA), PCL is widely used in food packaging, biomedicine due to its biocompatibility, biodegradability, non-toxicity, and non-immunogenicity. and other fields. However, the disadvantages of PCL, such as low melting point, poor stability, easy deformation under force, and slow degradation when used as a drug carrier, restric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L1/02C08L1/04C08G63/08
Inventor 东为富严洋洋陈明清马丕明施冬健段芳
Owner JIANGNAN UNIV
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