Preparation and Characterization of Algae⁃Resistant Biological Packaging Materials

doi:10.19491/j.issn.1001-9278.2021.03.002

Abstract

Abstract:

A series of anti-algal polypropylene films were prepared by melt blending and granulation flow using potassium sorbate （PS）， fluoride acid （FA） and salt as bacteriostatic agents， and polyester glycerin as a dispersant. The mechanical and optical performance， permeability， moisture permeability， and hydrophobic and water-resistant properties of the films were evaluated， and their algal microbial inhibition effect was investigated through the determination of the total number of microbial colonies. The results indicated that the film containing 4 wt% PS achieved optimal transverse and longitudinal tensile strength of （21.44±1.63） and （32.03±1.26） MPa， respectively. The optical properties， air permeability and moisture permeability of the films decreased with an increase in the concentration of bacteriostatic agent， but their hydrophobic properties increased. Both PS and FA can inhibit the growth of algae microorganisms. Such an antibacterial effect becomes more significant with an increase in the concentration of antibacterial agent. The films exhibit good antifouling and antibacterial properties.

Key words: polypropylene, potassium sorbate, fluoride acid, salt, polyester glycerin, anti-algal performance

CLC Number:

TQ325.1⁺4

LI Shaojing, YANG Fuxin, YANG Jinghui, CHEN Zuguo, WANG Guanglin. Preparation and Characterization of Algae⁃Resistant Biological Packaging Materials[J]. China Plastics, 2021, 35(3): 8-15.

Figures/Tables 9

References 26

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膜编号	PS含量/%	FA含量/%
CK	0	0
A	2	2
B	4	2
C	6	2
D	8	2
E	2	4
F	2	6
G	2	8

膜编号	PS含量/%	FA含量/%
CK	0	0
A	2	2
B	4	2
C	6	2
D	8	2
E	2	4
F	2	6
G	2	8

膜编号	厚度/mm	拉伸强度/MPa		断裂伸长率/%
膜编号	厚度/mm	横向	纵向	横向	纵向
CK	0.03	8.79±0.35^g	21.90±1.28^e	11.72±0.43^d	509.67±3.17^a
A	0.05	13.07±0.62^e	25.51±1.28^c	4.20±0.35^g	49.87±1.42^e
B	0.05	21.44±1.63^a	32.03±1.26^a	6.20±0.40^f	41.93±0.51^f
C	0.06	19.25±0.34^b	22.67±0.82^e	14.60±0.60^c	38.13±1.79^g
D	0.07	16.06±0.81^c	19.30±0.38^f	18.33±2.06^b	25.40±0.72^h
E	0.06	14.86±0.59^d	30.44±0.08^b	8.13±0.06^e	55.23±0.25^d
F	0.07	11.35±0.34^f	21.78±0.97^d	18.60±0.56^b	58.63±0.64^c
G	0.07	10.34±0.52^f	17.15±0.57^g	22.50±0.36^a	62.33±0.58^b

膜编号	厚度/mm	拉伸强度/MPa		断裂伸长率/%
膜编号	厚度/mm	横向	纵向	横向	纵向
CK	0.03	8.79±0.35^g	21.90±1.28^e	11.72±0.43^d	509.67±3.17^a
A	0.05	13.07±0.62^e	25.51±1.28^c	4.20±0.35^g	49.87±1.42^e
B	0.05	21.44±1.63^a	32.03±1.26^a	6.20±0.40^f	41.93±0.51^f
C	0.06	19.25±0.34^b	22.67±0.82^e	14.60±0.60^c	38.13±1.79^g
D	0.07	16.06±0.81^c	19.30±0.38^f	18.33±2.06^b	25.40±0.72^h
E	0.06	14.86±0.59^d	30.44±0.08^b	8.13±0.06^e	55.23±0.25^d
F	0.07	11.35±0.34^f	21.78±0.97^d	18.60±0.56^b	58.63±0.64^c
G	0.07	10.34±0.52^f	17.15±0.57^g	22.50±0.36^a	62.33±0.58^b

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