Chitosan used as a specific coupling agent to modify starch in preparation of adhesive film

Li, Dehong; Zhuang, Biaorong; Wang, Xiaodong; Wu, Zhenzeng; Wei, Wei; Aladejana, John Tosin; Hou, Xinjun; Liu, Jinghong

doi:10.1016/j.jclepro.2020.123210

Cited by 34 publications

(12 citation statements)

References 29 publications

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“…This result agrees with the FTIR spectra (Figure B). After the condensation of NH 2 and COOH groups of mercapto carboxylic acids, the NH 2 peak (1646 cm –1 ) of parent UiO-66–NH 2 is weakened, whereas the NH–CO peak (1562 cm –1 ) is enhanced. , Meanwhile, UiO–CH 2 SH and UiO–PhSH show a characteristic peak (approximately 2550 cm –1 ) attributed to the stretching vibrations of the SH group . However, after the H 2 O 2 oxidation, the −SH peaks in the spectra of UiO–CH 2 SO 3 H and UiO–PhSO 3 H disappeared, and the peaks at approximately 620 cm –1 (associated with stretching vibrations of S–O) and 1040 and 1170 cm –1 (associated with stretching vibrations of S=O in the SO 3 H group) appeared .…”

Section: Resultsmentioning

confidence: 99%

“…After the condensation of NH 2 and COOH groups of mercapto carboxylic acids, the NH 2 peak (1646 cm −1 ) of parent UiO-66−NH 2 is weakened, whereas the NH− CO peak (1562 cm −1 ) is enhanced. 42,43 Meanwhile, UiO− CH 2 SH and UiO−PhSH show a characteristic peak (approximately 2550 cm −1 ) attributed to the stretching vibrations of the SH group. 44 SO 3 H group) appeared.…”

Section: ■ Introductionmentioning

confidence: 99%

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MOF-Encapsulating Metal–Acid Interfaces for Efficient Catalytic Hydrogenolysis of Biomass-Derived Aromatic Aldehydes

Deng

Zhu

Zhong

et al. 2021

ACS Sustainable Chem. Eng.

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Developing an efficient and selective catalyst for C–O hydrogenolysis of biomass-derived aromatic aldehydes, such as 5-methylfurfural (MF), 5-hydroxymethylfurfural (HMF), and vanillin (VA), is highly significant for the synthesis of biofuel and fine chemicals. Herein, metal–organic framework (MOF)-encapsulating metal–acid interfaces (Pd@UiO–CH2SO3H, Pd@UiO–PhSO3H) were first reported. Compared with traditionally supported catalysts (Pd/UiO–SO3H, Pd/UiO–NH2), Pd–acid-interface-encapsulated MOFs show much higher activity and selectivity for MF to 2,5-dimethylfuran (DMF), HMF to DMF, and VA to 2-methoxy-4-methylphenol (MMP) reactions. In particular, Pd@UiO–SO3H shows the best catalytic performance with 89.0 and 86.0% DMF yield from MF and HMF and a 99.4% MMP yield from VA based on its suitable hydrophilicity, high hydrogen activation ability, and abundant Pd–SO3H interface active sites. According to the catalytic performance of Pd/UiO–NH2 and the results of an ATR-IR test, the acidic sites on the Pd–acid interface can accelerate the activation of the hydroxyl group for these hydrogenolysis reactions. This work provides an effective design strategy for the preparation of MOF-encapsulating metal–acid interfaces and shows the powerful synergistic effect of hydrogenation and acid catalysis.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

MOF-Encapsulating Metal–Acid Interfaces for Efficient Catalytic Hydrogenolysis of Biomass-Derived Aromatic Aldehydes

Deng

Zhu

Zhong

et al. 2021

ACS Sustainable Chem. Eng.

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“…Natural polymers derived from biomass (lignin, cellulose, hemicellulose), and chitosan have the potential to be used as bridging agents in adhesive formulations. These may be useful in systems containing inorganic materials and organic components such as starch, and their use can improve the adhesive properties of the formulation [ 100 , 101 , 102 ]. Blending starch with hydrophobic biopolymers (such as lignin) could be a strategy for improving the water-resistance of the adhesive and altering its mechanical properties.…”

Section: Other Modified Starches For Adhesive Applicationsmentioning

confidence: 99%

Modified Starch-Based Adhesives: A Review

et al. 2022

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Consumer trends towards environmentally friendly products are driving plastics industries to investigate more benign alternatives to petroleum-based polymers. In the case of adhesives, one possibility to achieve sustainable production is to use non-toxic, low-cost starches as biodegradable raw materials for adhesive production. While native starch contains only hydroxyl groups and has limited scope, chemically modified starch shows superior water resistance properties for adhesive applications. Esterified starches, starches with ester substituents, can be feasibly produced and utilized to prepare bio-based adhesives with improved water resistance. Syntheses of esterified starch materials can involve esterification, transesterification, alkylation, acetylation, succinylation, or enzymatic reactions. The main focus of this review is on the production of esterified starches and their utilization in adhesive applications (for paper, plywood, wood composites, fiberboard, and particleboard). The latter part of this review discusses other processes (etherification, crosslinking, grafting, oxidation, or utilizing biobased coupling agents) to prepare modified starches that can be further applied in adhesive production. Further discussion on the characteristics of modified starch materials and required processing methods for adhesive production is also included.

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“…With the increasing shortage of global petroleum resources and gradually increasing environmental awareness, attention has increasingly turned toward renewable biomass resources. Preparing biomass wood adhesives with natural substances as raw materials (e.g., starch, lignin, tannin, and soy protein) has become a current research hotspot and development trend in the field of wood adhesives, among which soy protein-based adhesives have been extensively explored [ 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. At present, soy protein-based adhesives have developed into mainstream biomass wood adhesives, where various soy protein adhesives have been industrially applied to plywoods and laminated core boards [ 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

A New Wood Adhesive Based on Recycling Camellia oleifera Cake-Protein: Preparation and Properties

Deng

Zhang

et al. 2022

Materials

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In order to improve the initial viscosity and stability of Camellia oleifera cake-protein adhesive, Camellia oleifera cake-protein was blended with defatted soybean protein (DSP), soybean protein isolate (SPI), and casein, followed by adhesive preparation through degradation and crosslinking methods. The performance of Camellia oleifera cake-protein adhesive was investigated by Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), scanning electron microscopic (SEM), and thermogravimetric (TG) and X-ray diffraction (XRD). The results showed that DSP, SPI, and casein likely promoted the effective degradation of Camellia oleifera cake-protein, and, thus, more active groups were formed in the system, accompanied by more reactivity sites. The prepared adhesive had a lower curing temperature, and higher initial viscosity and stability, but the storage time was shortened. Moreover, DSP, SPI, and casein, themselves, were degraded into peptide chains with lower molecular weights; thus, improving the overall flexibility of the adhesive, facilitating a better elastic contact and regular array between crosslinking products, and further strengthening the crosslinked structure and density of the products. After curing, a compact and coherent reticular structure was formed in the adhesive layer, with both bonding strength and water resistance being significantly improved. According to the results obtained, the next step will be to study the DSP-modified Camellia oleifera cake-protein adhesive in depth.

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Chitosan used as a specific coupling agent to modify starch in preparation of adhesive film

Cited by 34 publications

References 29 publications

MOF-Encapsulating Metal–Acid Interfaces for Efficient Catalytic Hydrogenolysis of Biomass-Derived Aromatic Aldehydes

MOF-Encapsulating Metal–Acid Interfaces for Efficient Catalytic Hydrogenolysis of Biomass-Derived Aromatic Aldehydes

Modified Starch-Based Adhesives: A Review

A New Wood Adhesive Based on Recycling Camellia oleifera Cake-Protein: Preparation and Properties

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