Polyvinyl alcohol–cellulose blend wood adhesive modified by citric acid and its effect on physical, thermal, mechanical and performance properties

Vineeth, S. K.; Gadhave, Ravindra V.; Gadekar, Pradeep T.

doi:10.1007/s00289-022-04439-0

Cited by 32 publications

(7 citation statements)

References 39 publications

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“…This bond is formed by the reaction between the carboxylic group in CFG and the hydroxyl group in PVA. This observation aligns with data reported in previous studies [ 60 , 61 ], confirming the successful formation of ester bonds in the composite material. This structural arrangement is crucial for enhancing the overall performance of the material.…”

Section: Resultssupporting

confidence: 93%

Enhancing Polyvinyl Alcohol Nanocomposites with Carboxy-Functionalized Graphene: An In-Depth Analysis of Mechanical, Barrier, Electrical, Antibacterial, and Chemical Properties

Shui,

Yao,

Lin

et al. 2024

Polymers

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To enhance the various properties of polyvinyl alcohol (PVA), varying concentrations of carboxy-functionalized graphene (CFG) were employed in the preparation of CFG/PVA nanocomposite films. FTIR and XRD analyses revealed that CFG, in contrast to graphene, not only possesses carboxylic acid group but also exhibits higher crystallinity. Mechanical testing indicated a notable superiority of CFG addition over graphene, with optimal mechanical properties such as tensile and yield strengths being achieved at a 3% CFG concentration. Relative to pure PVA, the tensile strength and yield strength of the composite increased by 2.07 and 2.01 times, respectively. XRD analysis showed distinct changes in the crystalline structure of PVA with the addition of CFG, highlighting the influence of CFG on the composite structure. FTIR and XPS analyses confirmed the formation of ester bonds between CFG and PVA, enhancing the overall performance of the material. TGA results also demonstrated that the presence of CFG enhanced the thermal stability of CFG/PVA nanocomposite films. However, analyses using scanning electron microscopy and transmission electron microscopy revealed that a 3% concentration of CFG was uniformly dispersed, whereas a 6% concentration of CFG caused aggregation of the nanofiller, leading to a decrease in performance. The incorporation of CFG significantly enhanced the water vapor and oxygen barrier properties of PVA, with the best performance observed at a 3% CFG concentration. Beyond this concentration, barrier properties were diminished owing to CFG aggregation. The study further demonstrated an increase in electrical conductivity and hydrophobicity of the nanocomposites with the addition of CFG. Antibacterial tests against E. coli showed that CFG/PVA nanocomposites exhibited excellent antibacterial properties, especially at higher CFG concentrations. These findings indicate that CFG/PVA nanocomposites, with an optimized CFG concentration, have significant potential for applications requiring enhanced mechanical strength, barrier properties, and antibacterial capabilities.

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Section: Resultssupporting

confidence: 93%

Enhancing Polyvinyl Alcohol Nanocomposites with Carboxy-Functionalized Graphene: An In-Depth Analysis of Mechanical, Barrier, Electrical, Antibacterial, and Chemical Properties

Shui,

Yao,

Lin

et al. 2024

Polymers

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“…The maximum shear adhesion strength of CMC-AT to basswood is 6.49 MPa, which is obviously higher than 3.14 MPa of a modified cellulose nanorod hydrogel adhesive reported previously [45]. Compared to several recent adhesives based on natural products, it also has obvious strength advantages [46][47][48][49]. This may be related to the formation mechanism of CMC-AT nanofibers using a bottomup strategy.…”

Section: Shear Adhesion Strength Testmentioning

confidence: 68%

A Novel Nanofiber Hydrogel Adhesive Based on Carboxymethyl Cellulose Modified by Adenine and Thymine

Xie,

Yang,

Wan

et al. 2024

Polymers

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Natural polymer-based adhesive hydrogels have garnered significant interest for their outstanding strength and versatile applications, in addition to being eco-friendly. However, the adhesive capabilities of purely natural products are suboptimal, which hampers their practical use. To address this, we engineered carboxymethyl cellulose (CMC) surfaces with complementary bases, adenine (A) and thymine (T), to facilitate the self-assembly of adhesive hydrogels (CMC-AT) with a nanofiber configuration. Impressively, the shear adhesive strength reached up to 6.49 MPa with a mere 2% adhesive concentration. Building upon this innovation, we conducted a comparative analysis of the shear adhesion properties between CMC and CMC-AT hydrogel adhesives when applied to delignified and non-delignified wood chips. We examined the interplay between the adhesives and the substrate, as well as the role of mechanical interlocking in overall adhesion performance. Our findings offer a fresh perspective on the development of new biodegradable polymer hydrogel adhesives.

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“…3(a)). [86][87][88] Unfortunately, citric acid covalently bonds with any hydroxyl group and becomes undesirable for a thoroughly efficient biconjugated formation, 89,90 crosslinking the same type of biomolecule in the process. 91 Besides citric acid, other molecules with carboxylic groups work as linkers and assemble cellulose-biomolecule systems, including oxalic acid 92 and succinic acid.…”

Section: Cellulose Bioconjugated Ternary Systemsmentioning

confidence: 99%

Lignocellulosic–biomolecules conjugated systems: green-engineered complexes modified by covalent linkers

Lima,

Ribeiro-Viana,

Plath

et al. 2024

J. Mater. Chem. B

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Polyvinyl alcohol–cellulose blend wood adhesive modified by citric acid and its effect on physical, thermal, mechanical and performance properties

Cited by 32 publications

References 39 publications

Enhancing Polyvinyl Alcohol Nanocomposites with Carboxy-Functionalized Graphene: An In-Depth Analysis of Mechanical, Barrier, Electrical, Antibacterial, and Chemical Properties

Enhancing Polyvinyl Alcohol Nanocomposites with Carboxy-Functionalized Graphene: An In-Depth Analysis of Mechanical, Barrier, Electrical, Antibacterial, and Chemical Properties

A Novel Nanofiber Hydrogel Adhesive Based on Carboxymethyl Cellulose Modified by Adenine and Thymine

Lignocellulosic–biomolecules conjugated systems: green-engineered complexes modified by covalent linkers

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