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. 2019 Aug 21;9(45):26214-26218.
doi: 10.1039/c9ra02644d. eCollection 2019 Aug 19.

Structural factors of benzylated glucopyranans for shear-induced adhesion

Abu Bin Ihsan  1 , Yuta Kawaguchi  2 , Hiromichi Inokuchi  2 , Hiroshi Endo  2 , Yasuhito Koyama  1
Affiliations

Structural factors of benzylated glucopyranans for shear-induced adhesion

Abu Bin Ihsan et al. RSC Adv. .

Abstract

We have prepared benzylated glucopyranans and evaluated the structural effects on the adhesion capacity. It was found that 97%-benzylated (1→2)-glucopyranan exhibited a unique shear-induced adhesion. The effects of structural factors on the adhesion behaviors are discussed through systematic adhesion tests, differential scanning calorimetry, theoretical models, and IR spectroscopy.

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Conflict of interest statement

There are no conflicts to declare.

Figures

Fig. 1
Fig. 1. (a) Structures of Glcp-(1-4) and (b) Glcp-(1-2) and (c) the plausible structure of the kinetically stabilized elongated chain of adhesive Glcp-(1-2)-X.
Fig. 2
Fig. 2. (a) Adhesion testing geometry to measure SAdh, (b) a photograph of the macroscopic fiber formation of Glcp-(1-2)-97, and (c) the dependence of SAdh on the benzylation ratio. Bars are average values from three samples. The relative standard deviations (%RSD) are 0.04% for Glcp-(1-2)-97, 3.9% for Glcp-(1-2)-80, 24% for Glcp-(1-2)-0, and 23% for Glcp-(1-4)-95.
Scheme 1
Scheme 1. Synthesis of Glcp-(1-2)-based adhesives. Glcp-(1-2) with X% benzylation is abbreviated as Glcp-(1-2)-X.
Fig. 3
Fig. 3. (a) Dependence of SAdh on the number of cycles by the repeated lap-shear tests of Glcp-(1-2)-X using the same sample (v: 10 mm min−1), (b) dependence of the SAdh value of Glcp-(1-2)-97 on v, and (c) the proportional relationship of SAdh to G0.55. Lines are to guide the eyes.
Fig. 4
Fig. 4. Partial IR spectra of Glcp-(1-2)-97, Glcp-(1-2)-80, and Glcp-(1-4)-95.
See this image and copyright information in PMC

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