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Soy Protein/Polyvinyl-Alcohol -Based Packaging Films Reinforced by Nano-TiO[sub.2]
Polymers, 2023-04, Vol.15 (7)
[Peer Reviewed Journal]
COPYRIGHT 2023 MDPI AG ;ISSN: 2073-4360 ;EISSN: 2073-4360 ;DOI: 10.3390/polym15071764
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Title:
Soy Protein/Polyvinyl-Alcohol -Based Packaging Films Reinforced by Nano-TiO[sub.2]
Author:
Tian, Xueying
;
Chen, Zhizhou
;
Lu, Xiaomeng
;
Mu, Jianlou
;
Ma, Qianyun
;
Li, Xiaoyuan
Subjects:
Packaging
Is Part Of:
Polymers, 2023-04, Vol.15 (7)
Description:
This work was investigated to prepare a reinforcing composite packaging film composited of soy protein/polyvinyl alcohol (PVA) and nano-TiO[sub.2]. First, different film compositions were designed by the particle size of nano-TiO[sub.2], concentration of nano-TiO[sub.2], concentration of polyvinylpyrrolidone (PVP, a dispersing agent for nano-TiO[sub.2]), and pH of film casting solution. Then, the film composition that yielded the optimal physical properties was identified using orthogonal array design single-factor experiments, considering its physical properties, including tensile strength, elongation, water absorption, water vapor transmission, oxygen permeation, thermal property, and film morphology. The results displayed that the optimal film composition was (1) soy protein/PVA film with 2.5 wt% nano-TiO[sub.2], (2) 30 nm nano-TiO[sub.2] particle size, (3) 1.5 wt% PVP, and (4) pH 6.0 of film-forming solution. It yielded tensile strength of 6.77 MPa, elongation at break rate of 58.91%, and water absorption of 44.89%. Last, the films were characterized by scanning electron microscope (SEM) and differential scanning calorimetry (DSC). SEM analysis showed that compared with the film without TiO[sub.2], the film containing TiO[sub.2] has a smoother surface, and DSC determined that adding nano-TiO[sub.2] can improve the thermostability of soy protein/PVA film. Therefore, the film prepared in this paper is expected to provide a new theoretical basis for use in the packaging industry.
Publisher:
MDPI AG
Language:
English
Identifier:
ISSN: 2073-4360
EISSN: 2073-4360
DOI: 10.3390/polym15071764
Source:
Geneva Foundation Free Medical Journals at publisher websites
PubMed Central
ROAD: Directory of Open Access Scholarly Resources
ProQuest Central
DOAJ Directory of Open Access Journals
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