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Exploring Hydrogels and Their Applications

Authored by Vitor Gaspar

Chemistry

University

Used 2+ times

Exploring Hydrogels and Their Applications
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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What are hydrogels and how are they formed?

Hydrogels are metallic compounds created through chemical reactions.

Hydrogels are solid crystals formed by heating polymers.

Hydrogels are water-absorbing polymer networks formed by polymerization or physical cross-linking.

Hydrogels are gases that dissolve in water to form solutions.

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Explain the concept of polymeric hydrogels and their properties.

Polymeric hydrogels are non-biodegradable plastics.

Polymeric hydrogels are only used in construction materials.

Polymeric hydrogels are solid materials with no water content.

Polymeric hydrogels are water-absorbing polymer networks with properties like high elasticity, biocompatibility, and responsiveness to stimuli.

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What factors influence the swelling behavior of hydrogels?

Factors influencing the swelling behavior of hydrogels include crosslinking degree, chemical composition, ionic groups, pH, temperature, and osmotic pressure.

Shape of the hydrogel

Color of the hydrogel

Molecular weight of the hydrogel

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How does crosslinking density affect the physical properties of hydrogels?

Crosslinking density affects hydrogels by influencing their mechanical strength, swelling capacity, and flexibility.

Crosslinking density only affects the color of hydrogels.

Crosslinking density has no effect on hydrogels.

Higher crosslinking density always increases swelling capacity.

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is shear thinning in the context of hydrogels?

Complete solidification under shear stress

Increase in viscosity under shear stress

No change in viscosity regardless of shear stress

Shear thinning in hydrogels is the reduction of viscosity under applied shear stress.

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

List some common applications of hydrogels in the food industry.

Thickening agents, food packaging, controlled release of flavors, and components in gels and desserts.

Artificial sweeteners in beverages

Coloring agents in snacks

Preservatives in canned goods

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What are the advantages of natural-based hydrogels over synthetic polymers?

Synthetic polymers are more biodegradable than natural-based hydrogels.

Natural-based hydrogels have a longer shelf life than synthetic polymers.

Natural-based hydrogels are more expensive than synthetic polymers.

Natural-based hydrogels offer biocompatibility, biodegradability, and better mimicry of natural tissues compared to synthetic polymers.

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