A Hydrophobic Sisal Cellulose Microcrystal Film for Fire Alarm Sensors

Zhang, Zuocai; Yang, Dan; Yang, Hongfen; Li, Yuqi; Lu, Shaorong; Cai, Ren; Tan, Weihong

doi:10.1021/acs.nanolett.0c04789

Cited by 68 publications

(31 citation statements)

References 39 publications

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“…The cross-sectional images of the MSF- g -COOH film are shown in Figure a,b, demonstrating its coarse surface and slight wrinkle. In contrast, the MC film displays a smooth surface and a dense interlamellar structure (Figure c,d), which is related to the stable network from chemical cross-linking with CA . After immersion in water, the MSF- g -COOH film showed a crinkled surface and crack feature (Figure e,f, Figure S2a and Movie S1), while the MC film maintained a smooth surface with dense lamellar structure after immersion in water (Figure g,h).…”

Section: Resultsmentioning

confidence: 98%

“…First, a biofilm (MSF-g-COOH film) was prepared by evaporating MSF-g-COOH solution (Scheme S1). 31 reaction between CH 2 ClCOOH and MSF powder. OC−O formation confirms the successful cross-linking esterification reaction between MSF-g-COOH and CA (Figure 1c and Figure S1c), consistent with the IR spectra.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…In contrast, the MC film displays a smooth surface and a dense interlamellar structure (Figure 2c,d), which is related to the stable network from chemical cross-linking with CA. 31 After immersion in water, the MSF-g-COOH film showed a crinkled surface and crack feature (Figure 2e,f, Figure S2a and Movie S1), while the MC film maintained a smooth surface with dense lamellar structure after immersion in water (Figure 2g,h). In addition, the MC film maintained the morphology without any swelling deformation, demonstrating significantly improved water tolerance (Figure S2b and Movie S2).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…This favorable behavior is attributed to the stable cross-linked network structure in MC film. 31 The water resistance of the film is very important for practical applications. The equilibrium water uptake (EWU) of MC film was investigated at different temperatures (Figure 2i).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…First, a biofilm (MSF- g -COOH film) was prepared by evaporating MSF- g -COOH solution (Scheme S1). After cross-linking with CA, a large MC biofilm (Scheme d–f, 10 × 40 cm) was prepared. As shown in Scheme e, the −COOH functional group of CA dehydrated to form a cyclic anhydride, which further reacted with −OH of the MSF- g -COOH film for cross-linking. , …”

Section: Resultsmentioning

confidence: 99%

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A High-Wet-Strength Biofilm for Readable and Highly Sensitive Humidity Sensors

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Low-cost and flexible biofilm humidity sensors with good wet strength are crucial for humidity detection. However, it remains a great challenge to integrate good reversibility, rapid humidity response, and robust humid mechanical strength in one sensor. In this respect, we report a facile method to prepare a sustainable biofilm (named MC film) from sisal cellulose microcrystals (MSF-g-COOH) and citric acid (CA). After crosslinking with CA, the MC film exhibits excellent wet strength and rapid humidity response. More importantly, MC film can be used over a wide temperature range with excellent durability and reversibility for humidity detection. A highly sensitive humidity sensor fabricated from the MC film exhibits high reversibility and excellent water resistance and can be applied in humidity and personalized breath health monitoring. Our work fills the gap between biomaterial design and high-performance sensing devices.

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Section: Resultsmentioning

confidence: 98%

Section: ■ Results and Discussionmentioning

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Section: ■ Results and Discussionmentioning

confidence: 99%

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Section: Resultsmentioning

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Graphene‐Based Textiles for Thermal Management and Flame Retardancy

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Textile thermoregulation and thermal protection are crucial for human health and safety. Individual thermophysiological comfort control and flame retardancy are lacking in traditional garments. Novel nanomaterial innovations have solved these limitations and have facilitated the development of next‐generation intelligent textiles. Smart textiles based on graphene and graphene derivatives material have attracted substantial attention owing to its superior electrical conductivity, high thermal conductivity, and flexibility. This review provides an overview of the current progress on the smart textiles using graphene and graphene derivative material with a focus on personal thermal management and flame retardancy. It covers mechanics, material developments, fabric designs, and on‐body applications, offering a comprehensive knowledge and scope of the entire area. Innovations in chemistry and materials with worldwide collaboration will push the frontiers of graphene‐based smart textiles, promoting the development of genuine commercial goods on the market.

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2D MXenes for Fire Retardancy and Fire‐Warning Applications: Promises and Prospects

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Frequent fire disasters have caused massive impacts to the environment, human beings, and the economy. MXene has recently been intensively researched as potential flame retardants to provide passive fire protection for other materials via its physical barrier and catalyzing carbonization effects. In parallel, MXene has also demonstrated a great promise for creating early fire warning sensors, which is an emerging field that has the potential to provide active fire response through its thermoelectric effect. This makes it possible to integrate passive fire retardancy and active fire warning into one MXene‐based fire protection system on demand. However, fulfilling these promises needs more research. Herein, an overview of passive flame‐retardant materials and next‐generation smart fire warning materials/sensors based on MXene and its derivatives is provided. This study reviews their conceptual design, characterization, modification principles, performances, applications, and mechanisms. A discussion of the challenges that need to be solved for their future practical applications and opportunities is also presented.

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A Hydrophobic Sisal Cellulose Microcrystal Film for Fire Alarm Sensors

Cited by 68 publications

References 39 publications

A High-Wet-Strength Biofilm for Readable and Highly Sensitive Humidity Sensors

A High-Wet-Strength Biofilm for Readable and Highly Sensitive Humidity Sensors

Graphene‐Based Textiles for Thermal Management and Flame Retardancy

2D MXenes for Fire Retardancy and Fire‐Warning Applications: Promises and Prospects

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