Study on antibacterial performance of petal⁃like ZnO nanosheets in polypropylene foams

doi:10.19491/j.issn.1001-9278.2024.10.016

Abstract

Abstract:

Nano⁃ZnO is a type of inorganic antibacterial material with low cost， high safety， and long⁃term stability and has received wide attention in polymer composites. The dispersion state of nano⁃ZnO in the polymer matrix is an important factor affecting its antibacterial performance. In this study， Zn（NO₃）₂ and KOH were directly precipitated in the presence of dodecyl trimethyl ammonium bromide to obtain petal⁃shaped ZnO nanosheets （PS⁃ZnO）. The antibacterial performance of PS⁃ZnO and conventional nano⁃ZnO in polypropylene （PP） foams were compared. The results indicated that PS⁃ZnO exhibited a specific surface area of 59.6 %， which is larger than that of conventional nano⁃ZnO due to the staggered three⁃dimensional microstructure， and its packing density also reached 0.23 g/cm³. PS⁃ZnO presented higher antibacterial efficiency than conventional nano⁃ZnO in the PP foams. The PP foam containing 3 wt.% PS⁃ZnO obtained an antibacterial rate of 99.9 % against Staphylococcus aureus and Escherichia coli. This might be due to the fact that the petal⁃shaped structure made PS⁃ZnO more easily dispersed in the PP matrix， thus generating an excellent antibacterial effect.

Key words: ZnO nanosheet, petal?shape, polypropylene, foam, antibacterial property

CLC Number:

TQ325.1⁺4

XIE Aihua, CHEN Daijin, ZHAGN Chan, WANG Qing, MENG Fanjin, DONG Xuewei, WANG Yiming, WANG Aili. Study on antibacterial performance of petal⁃like ZnO nanosheets in polypropylene foams[J]. China Plastics, 2024, 38(10): 87-90.

Figures/Tables 5

References 17

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样品编号	PP含量	抗氧剂B215含量	Nano⁃ZnO含量	PS⁃ZnO含量
1^#	98.8	0.2	1	⁃⁃
2^#	97.8	0.2	2	⁃⁃
3^#	96.8	0.2	3	⁃⁃
4^#	98.8	0.2	⁃⁃	1
5^#	97.8	0.2	⁃⁃	2
6^#	96.8	0.2	⁃⁃	3

样品编号	PP含量	抗氧剂B215含量	Nano⁃ZnO含量	PS⁃ZnO含量
1^#	98.8	0.2	1	⁃⁃
2^#	97.8	0.2	2	⁃⁃
3^#	96.8	0.2	3	⁃⁃
4^#	98.8	0.2	⁃⁃	1
5^#	97.8	0.2	⁃⁃	2
6^#	96.8	0.2	⁃⁃	3

样品	ZnO含量/ %	金黄色葡萄球菌抗菌率/%	大肠杆菌抗菌率/%
纯PP泡沫	0	-	-
PP/Nano⁃ZnO 泡沫	1	53.3	28.4
	2	76.5	51.9
	3	85.2	70.6
PP/PS⁃ZnO 泡沫	1	84.8	68.4
	2	99.6	80.8
	3	99.9	99.9

样品	ZnO含量/ %	金黄色葡萄球菌抗菌率/%	大肠杆菌抗菌率/%
纯PP泡沫	0	-	-
PP/Nano⁃ZnO 泡沫	1	53.3	28.4
	2	76.5	51.9
	3	85.2	70.6
PP/PS⁃ZnO 泡沫	1	84.8	68.4
	2	99.6	80.8
	3	99.9	99.9

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