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A kind of poly(beta-hydroxybutyrate valerate)/modified nanocrystalline cellulose composite material and preparation method thereof

A technology of hydroxybutyrate valerate and nanocrystalline cellulose, which is applied in the field of poly/modified nanocrystalline cellulose composite materials and its preparation, can solve the problems of poor compatibility between PHBV and CNC, and achieve enhanced interfacial bonding, Promotes the crystallization process and improves compatibility

Active Publication Date: 2021-11-16
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of poor compatibility between PHBV and CNC, a poly(β-hydroxybutyrate valerate) / modified nanocrystalline cellulose composite material and its preparation method are provided

Method used

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  • A kind of poly(beta-hydroxybutyrate valerate)/modified nanocrystalline cellulose composite material and preparation method thereof
  • A kind of poly(beta-hydroxybutyrate valerate)/modified nanocrystalline cellulose composite material and preparation method thereof
  • A kind of poly(beta-hydroxybutyrate valerate)/modified nanocrystalline cellulose composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Sample 1: The CNC was vacuum-dried for 6 hours, which was recorded as sample 1.

[0026] Sample 2: Disperse 1g CNC in 100mL dimethyl sulfoxide, add 1mL concentration of 1wt% sodium hydroxide aqueous solution, first ultrasonic, then magnetically stir at room temperature for 1 hour; then add hexadecanoyl chloride dropwise, (CNC and The molar ratio of hexadecanoyl chloride is 1:2), magnetically stirred at 60°C for 44 hours, and the obtained product was subjected to several centrifugal washings with water and acetone, and then freeze-dried after dialysis for 5-7 days to obtain surface-modified and grafted hexadecanoyl The CNC of acid chloride, abbreviated as CNC-g-C16, is recorded as sample 2.

[0027] Sample 3: (1) Under nitrogen protection, add 10.3g N-methylimidazole and 12.4g 1-allyl chloride into a dry three-necked flask, stir mechanically, condense and reflux, the reaction temperature is 55°C, and the reaction time is After 13 hours, after the reaction was completed,...

Embodiment 2

[0032] A preparation method of poly(β-hydroxybutyrate valerate) / modified nanocrystalline cellulose composite material: 0.5wt% sample 2: CNC-g-C16 and PHBV matrix material are placed in a torque rheometer , melt blending at 180°C and 60r / min for 5min to obtain a poly(β-hydroxybutyrate valerate) / modified nanocrystalline cellulose composite material, which is denoted as PHBV / CNC-g-C16 composite material .

Embodiment 3

[0034] A preparation method of poly(β-hydroxybutyrate valerate) / modified nanocrystalline cellulose composite material: 1wt% sample 2: CNC-g-C16 and PHBV matrix material are placed in a torque rheometer, Melt blending at 180°C for 5 minutes at a speed of 60r / min to obtain a poly(β-hydroxybutyrate valerate) / modified nanocrystalline cellulose composite material, denoted as PHBV / CNC-g-C16 composite material.

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Abstract

The invention relates to a poly(β-hydroxybutyrate valerate) / modified nanocrystalline cellulose composite material and a preparation method thereof. By performing acylation and esterification reactions on the surface of the CNC, the surface of the CNC is respectively modified and processed. Grafting hexadecanoyl chloride or caprolactone, through the surface modification of CNC, makes the modified CNC surface hydrophobic, which helps to improve the compatibility between CNC and PHBV, so that the modified CNC can interface with PHBV The binding force is enhanced; at the same time, the modified CNC can promote the crystallization process of PHBV, can increase the crystallization temperature of PHBV, and can significantly improve the tensile properties of PHBV.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a poly(β-hydroxybutyrate valerate) / modified nanocrystalline cellulose composite material and a preparation method thereof. Background technique [0002] Poly(β-hydroxybutyrate valerate), referred to as PHBV, not only has many mechanical properties similar to petroleum-based polymers, but also has good biodegradability, biocompatibility and optical activity. However, the thermal degradation temperature of PHBV is close to the melting point, so its thermal stability is not good, which will cause instability in the melting process. Moreover, PHBV also has shortcomings such as excessive spherulites, high crystallinity, and brittle quality. These shortcomings have an adverse effect on the molding process of PHBV products, resulting in high production costs and difficulty in industrialization, which limits the application of PHBV. In order to broaden the application fields o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L1/02C08B15/00C08B3/14C08F251/02C08F226/06
CPCC08B3/14C08B15/00C08F251/02C08L67/04C08F226/06C08L1/02
Inventor 陈建香唐创
Owner JIANGSU UNIV OF TECH