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江苏省新型高分子功能材料工程研究中心 江苏省先进负碳技术重点实验室 苏州市软材料与新能源重点实验室 苏州大学材料与化学化工学部 苏州 215123
E-mail: zsun@suda.edu.cn
收稿日期:2024-03-28,
录用日期:2024-06-28,
网络出版日期:2024-07-22,
纸质出版日期:2024-11-20
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周长凯, 方鹏达, 张昊, 孙哲, 严锋. 基于天青B的聚丙烯酰胺-丙烯酸水凝胶用于虾类新鲜度监测. 高分子学报, 2024, 55(11), 1518-1528
Zhou, C. K.; Fang, P. D.; Zhang, H.; Sun, Z.; Yan, F. Azure B-incorporated poly(acrylamide-acrylic acid) hydrogel for shrimp freshness monitoring. Acta Polymerica Sinica, 2024, 55(11), 1518-1528
周长凯, 方鹏达, 张昊, 孙哲, 严锋. 基于天青B的聚丙烯酰胺-丙烯酸水凝胶用于虾类新鲜度监测. 高分子学报, 2024, 55(11), 1518-1528 DOI: 10.11777/j.issn1000-3304.2024.24095. CSTR: 32057.14.GFZXB.2024.7255.
Zhou, C. K.; Fang, P. D.; Zhang, H.; Sun, Z.; Yan, F. Azure B-incorporated poly(acrylamide-acrylic acid) hydrogel for shrimp freshness monitoring. Acta Polymerica Sinica, 2024, 55(11), 1518-1528 DOI: 10.11777/j.issn1000-3304.2024.24095. CSTR: 32057.14.GFZXB.2024.7255.
随着人们生活质量的不断提高,食品的质量问题也日益受到关注. 可视化智能包装材料可以通过颜色的变化,实现对食品新鲜度的实时监测. 然而,由于智能包装材料响应时间长,指示剂的泄漏加重食品污染,制约了可视化智能包装材料的发展和应用. 将吩噻嗪类阳离子染料天青B (Azure B)通过阴阳离子静电相互作用固定到聚丙烯酰胺-丙烯酸水凝胶中,利用其对生物胺敏感的特性,制备出了响应快、低泄漏的可视化智能包装水凝胶薄膜材料——丙烯酰胺与天青B丙烯酸盐交联水凝胶(PAMA-Az). 研究结果表明PAMA-Az薄膜材料能够实现pH和生物胺的快速响应,在氨气、挥发性盐酸的模拟实验中也表现出变色的可逆性. 和共混的天青B水凝胶相比,离子间静电相互作用显著降低了指示剂的迁移率,防止了指示剂的泄露. 快响应、低泄露的PAMA-Az凝胶薄膜材料成功应用于鲜虾的新鲜度的监测.
With the continuous improvement of life quality
the demand for higher food quality has risen. Traditionally printed information on food packaging
such as production date and shelf life
falls short of assessing food quality and freshness adequately. Visual intelligent packaging can determine the freshness of food by changing colors
but the potential for food contamination due to pH indicator leakages with long response time poses a threat to food safety and quality. Therefore
polymer dyes that exhibit good biocompatibility
rapid pH response
and resistance to migration are increasingly essential in visually intelligent packaging applications. The phenothiazine cationic dye Azure B
which is sensitive to pH fluctuations
was incorporated into a poly(acrylamide-acrylic acid) hydrogel by electrostatic interactions. The research scrutinized the internal cross-linking of the synthesized hydrogel film (PAMA-Az) using Fourier transform infrared spectroscopy and evaluated the mobility of Azure B within the hydrogel through a UV spectrum. Furthermore
a comprehensive assessment of the physical and chemical properties of PAMA-Az
including discoloration response
mechanical strength
swelling behavior
ammonia gas sensitivity
and color reversibility
was conducted. Results indicated that the pH-responsive PAMA-Az formed by electrostatic interactions possessed a more compact structure
improved color-changing responsiveness
and lower Azure B mobility compared to the blending hydrogel. The color transition of PAMA-Az from blue to lavender and finally pink within the pH range of 7-12
coupled with its swift response to ammonia vapor and color reversibility
highlights its potential for visual food intelligent packaging. In a shrimp freshness monitoring experiment
the PAMA-Az hydrogel film
used as a contact substrate
successfully achieved the visual assessment of shrimp freshness
where a color change from blue to pink signaled rotting. Consequently
the fast-response and low-mobility pH-responsive hydrogel film demonstrates promising applications in visual food intelligent packaging and gas-sensitive labeling.
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