Crosslinked poly(vinyl alcohol) composite films with cellulose nanocrystals: Mechanical and thermal properties

Tanpichai, Supachok; Oksman, Kristiina

doi:10.1002/app.45710

Cited by 44 publications

(25 citation statements)

References 42 publications

(101 reference statements)

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“…The 0 CNC-F samples showed a value of 16.3% for moisture uptake after 120 h. The moisture uptake was slightly reduced to 15.6 % with the addition of 1 wt% CNCs. Similar decrease of moisture uptake with the presence of CNCs in PVA films has been recently reported [19]. This reduction of moisture uptake was due to less amounts of freely hydroxyl groups of both PVA and CNCS interacted with water.…”

Section: Resultssupporting

confidence: 86%

Aligned-porous-structured poly(vinyl alcohol) foams with cellulose nanocrystals

Tanpichai¹,

Oksman²

2018

AIP Conference Proceedings

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Poly(vinyl alcohol) (PVA) foams were prepared using a green lyophilization process without the use of foaming agents. PVA solutions with contents of CNCs (1-4 wt%) were prepared at two different freezing temperatures (-20 and-186 °C). With the addition of CNCs, moisture uptake of the CNC-PVA foams prepared at two freezing temperatures was lower than the neat PVA foams. With increasing CNC contents, no significant change of the moisture uptake could be observed for both types of the foams. Similar values of the moisture uptake could be found from both foams frozen at-20 and-186 °C. Scanning electron microscope measurements revealed the aligned-porous-structure of the foams frozen at-186 °C along with the ice growth direction while large and elongated pores were observed from the foams with the lower freezing temperature. These unique features of the foams prepared by a freeze-drying technique could be controlled by changing the freezing temperature, and these foams could be useful for specific applications such as tissue engineering scaffolds, thermal insulators or filters.

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Section: Resultssupporting

confidence: 86%

Aligned-porous-structured poly(vinyl alcohol) foams with cellulose nanocrystals

Tanpichai¹,

Oksman²

2018

AIP Conference Proceedings

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“…The observed physical properties of MCS-b-PVA film are presented in Table 2. The resulting data is revealing the Recently, researchers [38,39] have been optimized the maximum stress and elastic modulus with variation of cellulose contents in PVA matrix. Pereira et al [40] have been reported that addition of 3% cellulose filler in PVA does not improve its mechanical properties significantly.…”

Section: Physical Characterization Of Filmmentioning

confidence: 95%

Micro-cellulose Sheet and Polyvinyl Alcohol Blended Film for Active Packaging

et al. 2019

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Extraction of chemically modified microcrystalline cellulose sheet (MCS) from rice husk is reported using a greener method. MCS is then blended with polyvinyl alcohol (PVA) by solution method under optimum conditions. The structural, morphological and physical properties were studied by spectroscopic, scanning electron microscope, gas chromatograph and standard ASTM methods. The result reveals the formation of carbonated microcrystalline cellulose blended polyvinyl alcohol (MCS-b-PVA) with improved mechanical, barrier and carbon di oxide releasing properties. Further, CO 2 releasing ability has made the film suitable for active packaging film for storage of meat products. The chemical mechanistic model for CO 2 release has been also proposed under the influence of hydronium ion and relative humidity in context of a close packet. Graphic Abstract Rice husk powderThermochemical treatment

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“…From the same group, there is a study on mechanical and thermal properties of crosslinked poly (vinyl alcohol) composite films with cellulose nanocrystals [66]. Crosslinker for the system was sodium tetraborate decahydrate (borax), and different weight % of CNCs was added to the PVA matrix.…”

Section: Nanocellulose-pva Crosslinkingmentioning

confidence: 99%

Chemical Modification of Nanocellulose in Wood Adhesive: Review

Vineeth¹,

Gadhave²,

Gadekar³

2019

OJPChem

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Bio-based nanomaterial is more attractive, due to its abundance, eco-friendliness and sustainability, when compared to the non-renewable toxic petrochemicals used in the wood adhesive sector. Recent studies on the formaldehyde emission by petrochemical binders in wood adhesives have attracted scientists for the research in biomaterial-based binders. In this aspect nanocellulose (NC) is one such material which has reinforcing ability and has natural binding properties. Conventional wood adhesive uses petrochemical-based binders and additives. Inclusion of nanocellulose in wood adhesive could drastically reduce the dependency on non-renewable petroleum sources. Even though wood adhesive uses NC for improving mechanical properties of the adhesive, usage is restricted because of its inability to enhance tackiness and adhesion compared with petrochemicals. Availability of free hydroxyl groups and feasibility for modification can be a potential way for functionalization of this nanomaterial. To improve adhesion properties and to make nanocellulose act as a functional filler, the crosslinking approach can be a possible solution. Enhancement of thermal properties with improved thermal degradation, water barrier properties of crosslinked films and enhanced mechanical properties especially in crosslinked poly (vinyl alcohol) (PVA) matrix, which is one of the binders for wood adhesive discussed in this review paper proves the potential applicability of crosslinked NC. Hence by inclusion of NC in wood adhesive and crosslinking with the binder, both mechanical and performance properties are expected to enhance which will create a new world and possibilities for the bio-based eco-friendly wood adhesives. In this review paper, we have reviewed the crosslinking of nanocellulose to enhance the performance of wood adhesives.

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Crosslinked poly(vinyl alcohol) composite films with cellulose nanocrystals: Mechanical and thermal properties

Cited by 44 publications

References 42 publications

Aligned-porous-structured poly(vinyl alcohol) foams with cellulose nanocrystals

Aligned-porous-structured poly(vinyl alcohol) foams with cellulose nanocrystals

Micro-cellulose Sheet and Polyvinyl Alcohol Blended Film for Active Packaging

Chemical Modification of Nanocellulose in Wood Adhesive: Review

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