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GATE 2026 BM – Question 14

Biomaterials and Tissue Engineering · Biomaterial Properties · 1 mark · Multiple choice

Electrostatic interaction between positively and negatively charged polymers in water most likely forms a ____ .

  1. Chemically crosslinked hydrogel
  2. Complex coacervate
  3. Photocrosslinked hydrogel
  4. Liposome

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Correct answer: (B) Complex coacervate

Explanation

Oppositely charged polyelectrolytes associate through electrostatic attraction and can phase-separate into a polymer-rich liquid phase, a complex coacervate. This does not require covalent chemical or photochemical crosslinking, and liposomes instead use amphiphilic lipid bilayers. Thus B.

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