Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (09): 8-15.doi: 10.13475/j.fzxb.20191203408

• Fiber Materials • Previous Articles     Next Articles

Preparation and property of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) composite films

TANG Feng1, YU Houyong2(), ZHOU Ying2, LI Yingzhan2, YAO Juming1, WANG Chuang1, JIN Wanhui3   

  1. 1. School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    2. College of Textiles Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    3. Hubei Province Fibre Inspection Bureau, Wuhan, Hubei 430000, China
  • Received:2019-12-06 Revised:2020-06-02 Online:2020-09-15 Published:2020-09-25
  • Contact: YU Houyong E-mail:phdyu@zstu.edu.cn

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Abstract:

Aiming to improve the antibacterial properties of poly (3-hydroxybutyrate-co-3-hydroxyvalerate copolyester) (PHBV) film, cellulose nanofibril (CNF) with different polar groups was used to produce CNF-Ag hybrid materials with different morphologies via the in situ reduction method, which was incorporated into poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) matrix to get antibacterial high-barrier composite films. The morphology, crystallinity, thermal stability, chemical structure and antibacterial properties of samples were investigated and analyzed. The results show that the surface carboxyl group content of CNF-Ag hybrid can reach up to 1.21 mmol/g by introducing citric acid and ascorbic acid. CNF-Ag not only induces PHBV to generate hydrogen bond network, but also improves the crystallization behavior, with the tensile strength of the composite film being 66.7 MPa, the modulus of elasticity 7.6 GPa, and the antibacterial activity against Staphylococcus aureus 99%.

Key words: composite film, cellulose nanofibril, poly (3-hydroxybutyrate-co-3-hydroxyvalerate), nano silver, antibacterial ability, high barrier property

CLC Number: 

  • TQ352.8

Fig.1

Experimental route"

Fig.2

SEM images of fractured morphologies of different PHBV composite films"

Fig.3

UV-visible spectra of different PHBV composite films"

Fig.4

FT-IR spectra of different PHBV composite films"

Fig.5

X-ray diffraction spectra of PHBV composite films"

Fig.6

DSC curves of PHBV composite films. First cooling process; (b) Second heating process"

Tab.1

Hydrogen bond coefficient and crystallinity of PHBV composite films"

样品名称 羧基含量/
(mmol·g-1)		 氢键系数 结晶度/%
PHBV/CNF-Ag 0.11 0.12±0.03 67.3±3.12
PHBV/CNF (4.5)-Ag 1.03 0.12±0.02 52.6±2.15
PHBV/CNF (7.5)-Ag 1.12 0.13±0.03 52.1±3.43
PHBV/CNFA-Ag 0.13 0.13±0.02 46.6±6.02
PHBV/CNFC-Ag 1.11 0.16±0.03 46.2±3.57
PHBV/CNFAC-Ag 1.21 0.18±0.03 35.4±1.89
PHBV/CNF(7.5)A-Ag 0.91 0.17±0.04 42.6±2.65

Fig.7

TGA (a), partial of TGA (b) and DTG (c) curves of PHBV composite films"

Tab.2

Mechanical properties and moisture transfer properties of PHBV composite films"

样品名称 拉伸强度/MPa 弹性模量/GPa 断裂伸长率/% 迁移量/(μg·kg-1) 吸水率/% 水蒸气透过率/
(10-14 kg·m·m-2·s-1·Pa-1)
异辛烷 乙醇
PHBV 10.2±0.3 0.1±0.3 1.78±0.13 107.0±0.5 83.9±9.8 10.06±0.02 7.63±0.04
PHBV/CNF-Ag 22.2±0.8 2.3±0.2 1.85±0.15 25.5±0.2 38.9±0.2 0.18±0.05 1.57±0.02
PHBV/CNF (4.5)-Ag 42.8±0.5 5.6±0.5 1.74±0.25 18.9±0.3 31.5±0.6 2.01±0.08 5.62±0.05
PHBV/CNF (7.5)-Ag 53.3±0.7 6.8±0.3 1.57±0.38 16.2±0.5 27.4±0.7 2.25±0.01 5.96±0.08
PHBV/CNFA-Ag 55.3±0.05 7.1±0.2 1.49±0.02 34.5±0.2 68.6±0.8 3.18±0.05 7.15±0.07
PHBV/CNFC-Ag 57.6±0.2 7.3±0.3 1.31±0.57 44.2±0.1 86.9±0.4 3.23±0.03 6.83±0.04
PHBV/CNFAC-Ag 66.7±0.6 7.6±0.3 1.29±0.89 35.4±0.6 61.5±0.3 3.91±0.09 8.13±0.06
PHBV/CNF (7.5)A-Ag 36.1±0.8 4.8±0.4 1.48±0.65 38.5±0.7 67.2±0.1 3.57±0.03 5.89±0.04

Fig.8

Bacteriostatic circle area of PHBV composite membrane in Staphylococcus aureus"

Tab.3

Antibacterial rate test result of PHBV composite films against staphylococcus aureus"

样品名称 抗菌率/%
PHBV/CNF-Ag 100.0
PHBV/CNF (4.5)-Ag 100.0
PHBV/CNF (7.5)-Ag 99.9
PHBV/CNFA-Ag 99.9
PHBV/CNFC-Ag 99.5
PHBV/CNFAC-Ag 99.9
PHBV/CNF(7.5)A-Ag 99.9
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