A brief representation of research article that emphasizes the preparation of self-healing guar gum hydrogel with multifunctional potential

1. Ultra-flexible Self-Healing Guar
Gum-Glycerol Hydrogel with
Injectable, Antifreeze, and Strain-
Sensitive Properties
Presenter: Ahmed Madni
Registration No.: SP18-R02-002

2. Introduction

3. Hydrogel
o Hydro-gels are polymeric material
o It acts very similar to natural tissue due to
their large water content
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4. o Natural polymers, extracted from the guar seeds
o An edible low-cost polymer
o Water-soluble polyhydroxy polysaccharide
o A raw material for the preparation of smart
wearable hydrogels
Guar Gum Hydrogel
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5. Objective(s) of Current Study
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o Borax-cross-linked GG hydrogels are very brittle,
and have weak flexibility, slow self-healing effect,
and poor low temperature tolerance
o To overcome the above mentioned problems in
Borax-crosslinked GG Hydrogel using facile method

6. Methodology

7. Preparation of GG-glycerol Hydrogel
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Figure 1. Schematic illustration of the preparation of the GG-glycerol hydrogel.

8. 1. Water absorption measurement (Using standard saline
solution)
2. Scanning electron microscopy (Nova Nano SEM 230)
3. FTIR spectroscopy (Nicolet 380 FTIR spectrometer)
Characterization
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9. 4. Antifreezing analysis (Differential scanning calorimetry)
5. Microscopic observation of self-healing process (Optical
Microscope)
6. Adhesion tests (Digital tensile machine)
7. Electrical tests (LCR meter)
Characterization
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10. Results and Discussion

11. Wet Hydrogel Cross-Linking
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Figure 2. (a) Effect of different borax concentration (wt %) on gel formation.

12. Swelling Analysis
Figure 2. (b) Swelling properties of wet GG-glycerol hydrogel and GG
hydrogel in standard saline solution (0.9% NaCl) at room temperature.
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13. FTIR Analysis
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Figure 3. (a) FTIR spectra of GG. (b) FTIR spectra of GG glycerol hydrogel.

14. Hydrogel Mechanical Properties
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Figure 4. (a) Mechanism model of GG-glycerol hydrogel extension and
stretching.

15. Injectable Property
Figure 4. (b) Syringe injection of different shapes and variation of viscosity
in variable frequency scanning of GG-glycerol hydrogel.
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16. Morphology Observation
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Figure 5. (a) Cross-section FE-SEM pictures of GG hydrogel. (b) Cross
section FE-SEM pictures of GG-glycerol hydrogel.

17. Antifreeze Property
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Figure 7. (a) Deionized water and water glycerol mixture solution (volume
ratio 9:1) for freezing at −16 °C for 4 h. (b) Before and after GG hydrogel
and GG-glycerol hydrogel for freezing at −16 °C for 1 h.

18. Self-Healing Property Analysis
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Figure 8. Optical microscopy to observe the self-healing process of crack
hydrogel.

19. Self-Adhesive and Strain-Sensitive
Properties
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Figure 9. (a) Self-adhesion of the transparent GG-glycerol hydrogel film. (b) Strain
sensitive detection model. (c) Relative resistance changes of the GG-glycerol
hydrogel sensor. The insets show the hydrogel strain sensor adhered onto the finger
straightening and bending.

20. o No biological function is assessed
Constrain(s) in Current Study
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21. o Self-adhesive hydrogel dressings
o 3D-printing
o Drug delivery
o Artificial electronic skin
Future Prospects
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22. Reference
Pan, X., Wang, Q., Ning, D., Dai, L., Liu, K., Ni, Y.,
Chen, L., & Huang, L. (2018). Ultraflexible Self-
Healing Guar Gum-Glycerol Hydrogel with
Injectable, Antifreeze, and Strain-Sensitive
Properties. ACS Biomaterials Science &
Engineering, 4(9), 3397-3404.
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23. Thanks!