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PHBV (poly(3-hydroxybutyrate-co-3-hydroxyvalerate)) composite material as well as preparation method and applications thereof

A composite material and reaction solvent technology, applied in the field of composite materials, can solve the problems of easy decomposition, instability, poor mechanical properties and solvent resistance, and achieve the effect of reducing melting temperature and improving toughness

Active Publication Date: 2015-05-13
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, it is hard and brittle at room temperature, extremely unstable in molten state, easy to decompose, narrow processing range, high crystallinity, poor mechanical properties and solvent resistance, so its application is greatly limited

Method used

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  • PHBV (poly(3-hydroxybutyrate-co-3-hydroxyvalerate)) composite material as well as preparation method and applications thereof
  • PHBV (poly(3-hydroxybutyrate-co-3-hydroxyvalerate)) composite material as well as preparation method and applications thereof
  • PHBV (poly(3-hydroxybutyrate-co-3-hydroxyvalerate)) composite material as well as preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Synthesis of sixth-generation polyamide-amine (G6.0-PAMAM) dendrimers:

[0033] (1) Take 68.8g of methyl acrylate after vacuum distillation in a 250mL round bottom flask, add 100mL of methanol to dissolve; add 6g of ethylenediamine dropwise at a rate of 2 drops / second, and react at 35°C for 6h; then At 50°C, excess methyl acrylate and reaction solvent methanol were removed under 0.1mmHg vacuum to obtain G0.5-COOCH 3 Polyamidoamine dendrimers.

[0034] (2) Take 240g of ethylenediamine in a 500mL round bottom flask, add 100mL of methanol to dissolve it, and set aside; take G0.5-COOCH 3 20.2g of polyamide-amine dendrimer was dissolved by adding 150mL of methanol, and the obtained solution was added dropwise at a rate of 2 drops / second to the previously obtained ethylenediamine methanol solution, and reacted at 50°C for 24h; then At 65° C., excess ethylenediamine and reaction solvent methanol were removed under 0.1 mmHg vacuum to obtain G1.0NH2 polyamidoamine dendrimer...

Embodiment 2

[0056] 1. Synthesis of the fifth generation polyamidoamine (G5.0PAMAM) dendrimers:

[0057] (1) Take 72.2g of methyl acrylate after vacuum distillation in a 250mL round bottom flask, add 110mL of methanol to dissolve; add 6g of ethylenediamine dropwise at a rate of 2 drops / second, and react at 38°C for 6.8h; Then at 52°C, excess methyl acrylate and reaction solvent methanol were removed under 0.12mmHg vacuum to obtain G0.5-COOCH 3 Polyamidoamine dendrimers.

[0058] (2) Take 250g of ethylenediamine in a 500mL round bottom flask, add 120mL of methanol to dissolve it, and set aside; take G0.5-COOCH 3 22.6g of polyamide-amine dendrimer was dissolved by adding 160mL of methanol, and the obtained solution was added dropwise at a rate of 2 drops / second to the previously obtained ethylenediamine methanol solution, and reacted at 53°C for 26h; then At 65°C, remove excess ethylenediamine and reaction solvent methanol under 0.08mmHg vacuum to obtain G1.0-NH 2 Polyamidoamine dendrimer...

Embodiment 3

[0072] 1. Synthesis of sixth-generation polyamide-amine (G6.0PAMAM) dendrimers:

[0073] (1) Take 56.3g of methyl acrylate after vacuum distillation in a 250mL round bottom flask, add 120mL of methanol to dissolve; add 5.6g of ethylenediamine dropwise at a rate of 2 drops / second, and react at 32°C for 6.8h ; Then at 48°C, excess methyl acrylate and reaction solvent methanol were removed under 0.13mmHg vacuum to obtain G0.5-COOCH 3 Polyamidoamine dendrimers.

[0074] (2) Take 220g of ethylenediamine in a 500mL round-bottomed flask, add 90mL of methanol to dissolve, and set aside; take 18.8g of G0.5-COOCH3 polyamide-amine dendrimer, add 140mL of methanol to dissolve, and the obtained solution Add dropwise at a speed of 2 drops / second to the previously obtained ethylenediamine methanol solution, and react at 48°C for 24 hours; then remove excess ethylenediamine and reaction solvent methanol at 62°C under 0.14mmHg vacuum, Get G1.0-NH 2 Polyamidoamine dendrimers.

[0075] (3) T...

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Abstract

The invention discloses a PHBV (poly(3-hydroxybutyrate-co-3-hydroxyvalerate)) composite material as well as a preparation method and applications thereof. The preparation method comprises the following steps: adding PHBV resin in a solvent, stirring at the temperature of 55-65 DEG C, and performing condensation reflux for 3-5 hours to prepare a PHBV solution; adding a polyamide-amine dendrimer solution in the PHBV solution, heating and stirring for 4-6 hours to prepare a mixed solution of PHBV / polyamide-amine dendrimer; pouring the mixed solution of PHBV / polyamide-amine dendrimer into a mould, spreading a film and volatilizing the solvent to obtain the PHBV composite material. According to the preparation method of the PHBV composite material, the special three-dimensional structure of PAMAM (polyamide-amine) dendrimer and a large number of cavity structures in the PAMAM dendrimer are utilized to destroy the regularity of PHBV, and the molecular chain segments of PHBV are allowed to extend towards all directions to reduce the crystallinity of PHBV, so that the toughness of the PHBV composite material is enhanced.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a PHBV composite material and its preparation method and application. Background technique [0002] Polymer materials are being used more and more widely, but the problems arising from them are also becoming more and more prominent. On the one hand, most synthetic polymer materials are currently non-degradable and will produce "white pollution" after being discarded; on the other hand, most of them are refined and synthesized with petroleum and natural gas as raw materials. However, such resources are increasingly scarce, so the research on ecological polymer materials is imminent. Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV for short) is a thermoplastic material synthesized by microorganisms. Its production consumes less oil and natural gas, and can also be biodegraded to avoid Produce "white pollution". Compared with other polymer materials, PHBV has the dual advanta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L87/00C08J5/18C08G83/00
Inventor 靳玉娟翁云宣李雪馨王垒张敏
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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