Phytic acid modified soy protein isolate/chitosan film: A multi-functional and degradable bio-based composite material for fire alarm sensor

Han, Xiaokun; Lu, Tianyun; Wang, He; Zhang, Zuocai; Lu, Shaorong

doi:10.1016/j.polymdegradstab.2023.110505

Cited by 4 publications

(3 citation statements)

References 53 publications

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“…Simultaneously, an absorption peak around 1725 cm –1 indicates the presence of ester groups in the cured EC-30. , Besides, the absorption peak at 1256 cm –1 corresponding to the C–O bond intensified, providing additional evidence for the formation of ester groups. A broad peak in the region 3400–3600 cm –1 in the spectrum of cured EC-30 is observed, suggesting the presence of hydroxyl groups. , During the curing process, epoxy rings may open and react with carboxyl groups, resulting in the formation of ester groups via the epoxy ring-acid reaction. These results demonstrate that epoxy groups of the ESPB can react with carboxyl groups of the CTPB to form β-hydroxy ester bonds without external catalysts.…”

Section: Resultsmentioning

confidence: 98%

“…A broad peak in the region 3400−3600 cm −1 in the spectrum of cured EC-30 is observed, suggesting the presence of hydroxyl groups. 61,62 During the curing process, epoxy rings may open and react with carboxyl groups, resulting in the formation of ester groups via the epoxy ring-acid reaction. These results demonstrate that epoxy groups of the ESPB can react with carboxyl groups of the CTPB to form βhydroxy ester bonds without external catalysts.…”

Section: Methodsmentioning

confidence: 99%

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Self-Healing, Recyclable Syndiotactic 1,2-Polybutadiene-Based Thermadapt Shape Memory Polymers with Cold-Programmed Shape Memory Effect

Xia,

Li,

Lin

et al. 2023

ACS Appl. Polym. Mater.

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Shape memory polymers (SMPs), as a type of smart material, play a significant role in practical applications. Unlike the hot programming of SMPs, the cold programming of SMPs does not require preheating. They can undergo deformation and fix a temporary shape at a specific temperature and can be restored upon heating. SMPs typically require internal cross-linking to "remember" their permanent shape. However, cross-linked materials cannot be recycled, resulting in resource waste and environmental pollution. Drawing inspiration from dynamic covalent cross-linking technology, for the first time, this paper integrates the coldprogrammed shape memory effect into thermadapt SMPs with syndiotactic 1,2-polybutadiene (SPB) as the matrix. To construct a thermadapt SMPs, this paper first obtained epoxidized syndiotactic 1,2-polybutadiene (ESPB) by epoxidizing SPB. Then, ESPB was mixed with carboxy-terminated liquid polybutadiene rubber (CTPB), resulting in the formation of β-hydroxyl ester dynamic bonds within the material. By regulating the internal cross-linking structure, its glass transition temperature (T g ) can be controlled. Furthermore, the molecular chain of the composite has a regular structure that enables stretching-induced crystallization. This enhances the material's ability to retain its temporary shape during cold programming. This paper provides a feasible and straightforward approach for the preparation of recyclable thermadapt SMPs with cold-programmed shape memory effect and paves the way for the recycling and long-term utilization of SMPs.

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Section: Resultsmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

Self-Healing, Recyclable Syndiotactic 1,2-Polybutadiene-Based Thermadapt Shape Memory Polymers with Cold-Programmed Shape Memory Effect

Xia,

Li,

Lin

et al. 2023

ACS Appl. Polym. Mater.

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“…Currently, sensors are widely used in several emerging fields such as soft robotics, flexible electronics, and motion monitoring. 61 Therefore, as shown in Figure 9a, the LNSs/ Ag-PVA organogels with high toughness, electrical conductivity, and frost resistance were assembled into wearable strain sensors. The movement of each joint of the human body was monitored in normal and low-temperature environments.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Fish Scale Biomimetic Multifunctional Antifreeze Organogel for Flexible Strain Sensor Applications

Hao,

Li,

Wang

et al. 2023

ACS Appl. Polym. Mater.

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The applications of conductive hydrogels in the fabrication of wearable sensors have been highlighted in recent studies. However, water in traditional hydrogels is volatile at room temperature and readily frozen at subzero temperatures, resulting in material failure, which is critical in their practical applicability. In this paper, we prepared an organogel with sodium lignin sulfonate (Ls) and poly(vinyl alcohol) in a dimethyl sulfoxide and water dualsolvent system and embedded dense fish scale biomimetic clusters of silver nanospheres on the surface of the organogel to impart high electrical conductivity and mechanical and antimicrobial properties. The obtained organogel exhibited excellent mechanical strength (1.58 MPa stress and 680% tensile strain), freeze resistance (−90 °C), and antimicrobial activity (bacteriostatic rate of more than 98%). In addition, the electrical conductivity of the organic gel still reached a high value of 1.9 mS cm −1 at the ultralow temperature of −90 °C. Moreover, the organogel sensor exhibited high strain sensitivity and fast response to various human movements; therefore, it accurately monitored human movement signals and physiological signals. This study proposes a simple method to prepare multifunctional lignin-based antifreeze organogels for their application in complex flexible wearable electronic devices, opening prospects for lignin-based antifreeze organogels.

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Preparation of graphene by circulating supercritical CO2 jet cavitation and its application in flexible sensor films

Li,

Yu,

et al. 2024

Applied Surface Science

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Phytic acid modified soy protein isolate/chitosan film: A multi-functional and degradable bio-based composite material for fire alarm sensor

Cited by 4 publications

References 53 publications

Self-Healing, Recyclable Syndiotactic 1,2-Polybutadiene-Based Thermadapt Shape Memory Polymers with Cold-Programmed Shape Memory Effect

Self-Healing, Recyclable Syndiotactic 1,2-Polybutadiene-Based Thermadapt Shape Memory Polymers with Cold-Programmed Shape Memory Effect

Fish Scale Biomimetic Multifunctional Antifreeze Organogel for Flexible Strain Sensor Applications

Preparation of graphene by circulating supercritical CO2 jet cavitation and its application in flexible sensor films

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