Superhydrophobic chitosan films via SiO2/PDMS coating for reducing liquid food residue

IF 6.2 1区 农林科学 Q1 AGRICULTURAL ENGINEERING
Mengting Yu, Yujing Sun, Na Ji, Lei Dai, Man Li, Xuyan Dong, Liu Xiong, Qingjie Sun
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Abstract

Superhydrophobic coatings have gained significant interest due to their ability to prevent liquid foods like juice and yogurt from adhering to the inner surfaces of containers, thus reducing waste. Superhydrophobic coatings limit its application due to its toxicity, degradability and other reasons. In this work, chitosan sodium phytate films were deposited on glass plates by layer-by-layer self-assembly (LBL), then SiO2 nanoparticles were introduced to construct micro/nano-structures, and finally, surface modification with polydimethylsiloxane (PDMS) was carried out to prepare superhydrophobic films. The surface of the superhydrophobic film had a micro/nano-scale structure similar to that of lotus leaves. The water contact angle (WCA) of superhydrophobic films reached 153°, and sliding contact angle (SA) was 5°. Owing to this unique structure, different liquid food droplets could roll off freely in a near spherical form on the chitosan phytate film surfaces, effectively reducing residue during container pouring. The outcomes of this study are expected to expand the potential applications of superhydrophobic chitosan films in liquid food anti-adhesion.

Abstract Image

二氧化硅/PDMS涂层的超疏水壳聚糖膜用于减少液态食品残留
超疏水涂层由于能够防止液体食物(如果汁和酸奶)粘附在容器的内表面,从而减少浪费而引起了人们的极大兴趣。超疏水涂料由于其毒性、可降解性等原因限制了其应用。通过层层自组装(LBL)在玻璃板上沉积壳聚糖植酸钠薄膜,然后引入二氧化硅纳米粒子构建微纳米结构,最后用聚二甲基硅氧烷(PDMS)对其表面进行改性,制备超疏水薄膜。超疏水膜表面具有类似于荷叶的微纳米结构。超疏水膜的水接触角(WCA)为153°,滑动接触角(SA)为5°。由于这种独特的结构,不同的食物液滴可以在壳聚糖植酸膜表面以接近球形的形式自由滚动,有效地减少了容器浇注过程中的残留物。本研究结果有望拓展壳聚糖超疏水膜在液体食品抗粘接中的潜在应用。
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来源期刊
Industrial Crops and Products
Industrial Crops and Products 农林科学-农业工程
CiteScore
9.50
自引率
8.50%
发文量
1518
审稿时长
43 days
期刊介绍: Industrial Crops and Products is an International Journal publishing academic and industrial research on industrial (defined as non-food/non-feed) crops and products. Papers concern both crop-oriented and bio-based materials from crops-oriented research, and should be of interest to an international audience, hypothesis driven, and where comparisons are made statistics performed.
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