Rice straw cellulose microfiber reinforcing PVA composite film of ultraviolet blocking through pre-cross-linking

Feng, Zhaoxue; Xu, Dan; Shao, Zhu-Bao; Zhu, Ping; Qiu, Jianhui; Zhu, Longxiang

doi:10.1016/j.carbpol.2022.119886

Cited by 36 publications

(17 citation statements)

References 49 publications

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“…Combining MICA and MIPA with PVA could improve the flexibility of the prepared cellulose-based composite films. This is attributed to the good miscibility of MICA and MIPA with PVA, which acts as an “internal plasticizer” for PVA, , increasing the flexibility of the cellulose-based composite films and the elongation at break.…”

Section: Resultsmentioning

confidence: 99%

Eco-Friendly Cellulose-Based Nonionic Antimicrobial Polymers with Excellent Biocompatibility, Nonleachability, and Polymer Miscibility

Dang,

Yu,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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This study aims to prepare natural biomass-based nonionic antimicrobial polymers with excellent biocompatibility, nonleachability, antimicrobial activity, and polymer miscibility. Two new cellulose-based nonionic antimicrobial polymers (MIPA and MICA) containing many terminal indole groups were synthesized using a sustainable one-pot method. The structures and properties of the nonionic antimicrobial polymers were characterized using nuclear magnetic resonance hydrogen spectroscopy ( 1 H NMR), infrared spectroscopy (FTIR), wide-angle X-ray diffractometry (XRD), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), gel chromatography (GPC), and other analytical techniques. The results showed that microcrystalline cellulose (MCC) molecules combined with indole derivatives through an esterification reaction to produce MICA and MIPA. The crystallinity of the prepared MICA and MIPA molecules decreased after MCC modification; their morphological structure changed from short fibrous to granular and showed better thermal stability and solubility. The paper diffusion method showed that both nonionic polymers had good bactericidal effects against the two common pathogenic bacteria Escherichia coli (E. coli, inhibition zone diameters >22 mm) and Staphylococcus aureus (S. aureus, inhibition zone diameters >38 mm). Moreover, MICA and MIPA showed good miscibility with biodegradable poly(vinyl alcohol) (PVA), and the miscible cellulose-based composite films (PVA-MICA and PVA-MIPA) showed good phase compatibility, light transmission, thermal stability (maximum thermal decomposition temperature >300 °C), biocompatibility, biological cell activity (no cytotoxicity), nonleachability, antimicrobial activity, and mechanical properties (maximum fracture elongation at >390%).

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Section: Resultsmentioning

confidence: 99%

Eco-Friendly Cellulose-Based Nonionic Antimicrobial Polymers with Excellent Biocompatibility, Nonleachability, and Polymer Miscibility

Dang,

Yu,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Here, the carboxyl (-COOH) and hydroxyl (-OH) groups from CNCs reacted with the hydroxyl (-OH) group of PVA to form ester bonds and strong hydrogen bonds through condensation reaction and elec-trostatic interaction, respectively (Figure 1e; Figures S3a and S4b, Supporting Information). [37] Next, the mixture was poured into a mold to prepare a PCG film, i.e., PVA/CNCs/GNs film (Figure 1g). Later, the PDA, as a linking agent, was rapidly coated on the PCG film surface by dopamine (DA) polymerization (asobtained PCG/PDA film) (Figures S3b,c and S4, Supporting Information), [38] which provided many active sites for Ag NPs' deposition.…”

Section: Resultsmentioning

confidence: 99%

A Flexible Strain Sensor with High Electrical Conductivity, Rapid Electrothermal Response, and High Strain Sensitivity for Real‐Time Monitoring of Human Joint Movement

Yang

et al. 2023

Adv Materials Technologies

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Here, a flexible film, called PPA film, is designed as a multifunctional sensor with high electrical conductivity, rapid electrothermal response, and high strain sensitivity. The film contains polyvinyl alcohol (PVA), graphene nanosheets (GNs), nanocellulose crystals (CNCs), polydopamine (PDA), and silver nanoparticles (Ag NPs), symbolized as PPA film. The CNCs enhance the dispersion of the GNs during film formation; the stacked GNs change heat conduction and resistance during film bending; PDA serves as a linking agent; Ag NPs improve the conductivity (i.e., 2.65 × 103 S/m) of the film during electrothermal response measurement. A flexible strain sensor designed from PPA films is mounted on the skin surface of human joints to monitor human movement in real time. The sensor exhibited good stability and cycling durability, i.e., the resistance variation remained stable during the bend‐release repetitions for 600 cycles at 1.2 % strain. The flexible sensors exhibited highly sensitive to bending strain, i.e., 30.5 of the gauge factor (GF), and can be applied to monitor bending motions of human joints, such as finger, wrist, elbow, and knee joints.In addition, the PPA films exhibit very high joule heat generation ability and demonstrate its applicability as a joint or stomach warmer and sensor. The as‐designed flexible sensor is a promising candidate for application in environmentally friendly and multifunctional wearable devices.

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“…However, for LDH@APP and B-LDH@APP, the mechanical performances improve compared with APP/EP; especially, the tensile strength and flexural strength of 4B-LDH@APP/EP increase to 65.5 and 82.2 MPa. The phenomena come from the increasing specific surface area after modification, which leads to more interfacial action sites, 57 enhancing the interfacial interaction of B-LDH@APP and EP. Interestingly, the 4(B- LDH + APP)/EP presents a flexural strength of 75.3 MPa and tensile strength of 59.6 MPa.…”

Section: Thermal Stability Of Flame-retardant Epsmentioning

confidence: 99%

“…57.8 ± 3.1 71.2 ± 2.9 4LDH@APP/EP 64.4 ± 3.8 81.6 ± 3.7 1B-LDH@APP/EP 74.3 ± 3.5 93.4 ± 3.3 2B-LDH@APP/EP 69.4 ± 3.6 88.2 ± 2.8 3B-LDH@APP/EP 67.9 ± 2.7 84.4 ± 2.1 4B-LDH@APP/EP 65.5 ± 3.0 82.2 ± 2.9 4(B-LDH + APP)/EP 59.6 ± 3.2 75.3 ± 3.1 T h i s c o n t e n t i s o n l y l i c e n s e d f o r c o n s u m p t i o n b y A u t h o r i z e d i n d i v i d u a l n o t d i r e c t l y a s s o c i a t e d LDH…”

mentioning

confidence: 99%

Facile Construction of Inorganic Phosphorus/Boron-Layered Double Hydroxide Complexes for Highly Efficient Fire-Safety Epoxy Resin

Shao

Wang

Lin

et al. 2023

ACS Appl. Polym. Mater.

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For inorganic flame retardants, facile fabrication and high-efficiency fire safety without compromising the mechanical property of the matrix are still significant challenges. Here, nanolayered double hydroxide containing boron constructed on the surface of ammonium polyphosphate (APP) complexes (B-LDH@APP) is prepared by a simple in situ coprecipitation technology to reduce the fire hazard and improves the mechanical performances of epoxy resin (EP). The as-obtained 4B-LDH@APP/EP achieves the UL-94 V-0 rating and presents superior flame-safety performance. With respect to the 4APP/EP, the fire growth rate (FIGRA), the peak heat release rate (pHRR), and the peak smoke production rate (pSPR) of 4B-LDH@APP/EP decrease by 77.8, 57.3, and 52.6%, respectively. This is mainly attributed to the excellent synergistic flame-retardant effect among boron, LDH, and APP, which can accelerate the generation of compact charring residual with a good microstructure during combustion of B-LDH@APP/EP composites. Furthermore, B-LDH@APP slightly affects the mechanical performances of the EP matrix due to the upgraded interfacial interaction.

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Rice straw cellulose microfiber reinforcing PVA composite film of ultraviolet blocking through pre-cross-linking

Cited by 36 publications

References 49 publications

Eco-Friendly Cellulose-Based Nonionic Antimicrobial Polymers with Excellent Biocompatibility, Nonleachability, and Polymer Miscibility

Eco-Friendly Cellulose-Based Nonionic Antimicrobial Polymers with Excellent Biocompatibility, Nonleachability, and Polymer Miscibility

A Flexible Strain Sensor with High Electrical Conductivity, Rapid Electrothermal Response, and High Strain Sensitivity for Real‐Time Monitoring of Human Joint Movement

Facile Construction of Inorganic Phosphorus/Boron-Layered Double Hydroxide Complexes for Highly Efficient Fire-Safety Epoxy Resin

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