Preparation and characterization of lysozyme@carbon nanotubes/waterborne polyurethane composite and the potential application in printing inks

Zhou, Xing; Deng, Jingrui; Fang, Changqing; Yu, Ruien; Lei, Wanqing; He, Xinyu; Zhang, Chaoqun

doi:10.1016/j.porgcoat.2020.105600

Cited by 18 publications

(10 citation statements)

References 43 publications

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“…The signals from 0.88-1.00 ppm which are complex are attributed to the H protons of IPDI. According to Brame et al [29], two sharp peaks at 1.67, 4.19 ppm (PUD1) and 1.67, 4.20 ppm (PUD2) are assigned to the methylene protons of -CH 2 CH 2 OOCNH-, -CH 2 CH 2 OOCNH-in BDO blocks, respectively. Meanwhile, the peak at 1.67 ppm is also ascribed to the methylene protons of -CH 2 CH 2 CH 2in PNA blocks.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Waterborne Polyurethane with Unique Nanoparticles by Controlling Water

Zhou¹

2022

Journal of Renewable Materials

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A facile method, focusing on emulsification, chain extension and dispersion process in preparing waterborne polyurethane, was developed to prepare emulsion with rod-like nanoparticles. The facile method involves a water addition procedure by in situ generated water to react with polyurethane prepolymer instead of the external water addition process. As a comparison, waterborne polyurethane was synthesized through the external water addition process. According to the characterization methods including FTIR, 1 H-NMR, TEM and water swelling experiments, it is suggested there are two kinds of hydrogen bonds interactions in hard/soft domain of the novel polyurethane, and the phase separation of hard/soft domains increases significantly. The morphology of the two polyurethanes was quite different (nanorods and spherical particles, respectively), presenting a different surface property. In addition, the water swelling of the novel polyurethane indicates that it holds significant potential application as degradable material.

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Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Waterborne Polyurethane with Unique Nanoparticles by Controlling Water

Zhou¹

2022

Journal of Renewable Materials

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“…The amplitudes and densities of PD pulses of P2 and P3 composites were smaller than pure PUA. PD phenomenon can induce degradation of material, because the activity generates high energy electrons and accompany with chemical oxidation, heat release and irradiation, which cause the chain and bond rupture, further destroy the structure of materials and ultimately lead to insulation breakdown 72‐75 …”

Section: Resultsmentioning

confidence: 99%

“…PD phenomenon can induce degradation of material, because the activity generates high energy electrons and accompany with chemical oxidation, heat release and irradiation, which cause the chain and bond rupture, further destroy the structure of materials and ultimately lead to insulation breakdown. [72][73][74][75] 4 | CONCLUSION In this work, three different kinds of nanofillers including CNTs, CNC, and Al 2 O 3 with organic and inorganic attributions were employed to modify PUA dispersions. The functions of the nanofillers in the polymer matrix were investigated, as well as the micro-structure and applied performance, especially the mechanical and dielectric properties.…”

Section: Charge Transportation and Dielectric Responsementioning

confidence: 99%

Functional nano‐fillers in waterborne polyurethane/acrylic composites and the thermal, mechanical, and dielectrical properties

Zhou

Song

Wang

et al. 2021

J of Applied Polymer Sci

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Modification is mostly used to adjust and increase the performance of polymers by employing organic or inorganic fillers in composites. It is significant to investigate the functions of different fillers in polymer matrix. In this work, we prepared a series of composites by using polyurethane/acrylic dispersions as polymer matrix and nanofillers (cellulose nanocrystals, carbon nanotubes and aluminum oxide nanoparticles) as modifiers to study their micro-structure and applied performance. It is found that the different nanofillers can be dispersed in PUA homogenously, which are inclusive physically. Different nanofillers have a noticeable influence on the T g for the acrylate copolymers and the T g of the interphase between the acrylate and polyurethane. The CNTs significantly increases the elongation to 127.29%, and gives the highest dielectric response. We imply that the CNTs may be the most significant fillers to increase the mechanical and electrical properties.

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“…Despite its interesting properties, the use of free lysozyme in packaging is restricted because it is unstable. Food protease can hydrolyze it and inactivate its catalytic activity [ 238 , 239 ]. The modification of lysozyme via heat, chemicals, and hydrolysis enhances its biological activities and broadens its applications [ 240 ].…”

Section: Active Biodegradable Packaging Filmsmentioning

confidence: 99%

Advancements in Biodegradable Active Films for Food Packaging: Effects of Nano/Microcapsule Incorporation

Baghi

Gharsallaoui

Dumas

et al. 2022

Foods

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Food packaging plays a fundamental role in the modern food industry as a main process to preserve the quality of food products from manufacture to consumption. New food packaging technologies are being developed that are formulated with natural compounds by substituting synthetic/chemical antimicrobial and antioxidant agents to fulfill consumers’ expectations for healthy food. The strategy of incorporating natural antimicrobial compounds into food packaging structures is a recent and promising technology to reach this goal. Concepts such as “biodegradable packaging”, “active packaging”, and “bioactive packaging” currently guide the research and development of food packaging. However, the use of natural compounds faces some challenges, including weak stability and sensitivity to processing and storage conditions. The nano/microencapsulation of these bioactive compounds enhances their stability and controls their release. In addition, biodegradable packaging materials are gaining great attention in the face of ever-growing environmental concerns about plastic pollution. They are a sustainable, environmentally friendly, and cost-effective alternative to conventional plastic packaging materials. Ultimately, a combined formulation of nano/microencapsulated antimicrobial and antioxidant natural molecules, incorporated into a biodegradable food packaging system, offers many benefits by preventing food spoilage, extending the shelf life of food, reducing plastic and food waste, and preserving the freshness and quality of food. The main objective of this review is to illustrate the latest advances in the principal biodegradable materials used in the development of active antimicrobial and antioxidant packaging systems, as well as the most common nano/microencapsulated active natural agents incorporated into these food-packaging materials.

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Preparation and characterization of lysozyme@carbon nanotubes/waterborne polyurethane composite and the potential application in printing inks

Cited by 18 publications

References 43 publications

Preparation and Characterization of Waterborne Polyurethane with Unique Nanoparticles by Controlling Water

Preparation and Characterization of Waterborne Polyurethane with Unique Nanoparticles by Controlling Water

Functional nano‐fillers in waterborne polyurethane/acrylic composites and the thermal, mechanical, and dielectrical properties

Advancements in Biodegradable Active Films for Food Packaging: Effects of Nano/Microcapsule Incorporation

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