Sintesis Lendir (PVA Terikat Silang)

Membuat cairan non-Newton dengan mengikat silang polivinil alkohol

Organic Synthesis Beginner (Middle School) 20 menit ~$5,00

Tujuan

Buat lendir dengan mengikat silang polivinil alkohol (PVA) dengan natrium borat, mendemonstrasikan kimia polimer dan perilaku cairan non-Newton.

Latar Belakang

When sodium borate (borax) is added to polyvinyl alcohol, borate ions form cross-links between PVA polymer chains, creating a viscoelastic material known as slime. The product exhibits non-Newtonian behavior: it flows slowly under gravity but breaks when pulled sharply.

Peringatan Keselamatan

  • Borax is an irritant — avoid eye contact
  • Wash hands after handling slime
  • Do not eat the slime

APD yang Diperlukan

goggles

Bahan

  • Polyvinyl alcohol (PVA) solution (50 mL)
    4% solution or white school glue
  • Sodium borate (borax) (5 g)
    Dissolved in 50 mL water
  • Food coloring (2-3 drops)
    Optional

Peralatan

250 mL beaker Stirring rod Measuring cylinder

Prosedur

1

Pour 50 mL of PVA solution (or white school glue) into the beaker.

1 menit
2

Add 2-3 drops of food coloring if desired and stir.

1 menit
3

Slowly add the borax solution to the PVA while stirring continuously.

3 menit
4

Continue stirring as the mixture thickens into slime. Knead with hands once it forms.

5 menit Wash hands afterward
5

Test the non-Newtonian properties: roll into a ball, let it flow slowly, pull sharply to see it snap.

5 menit
6

Experiment with the ratio of borax to PVA to change slime consistency.

5 menit

Hasil yang Diharapkan

A stretchy, squishy slime that flows slowly under gravity but breaks when pulled quickly. More borax makes stiffer slime; less makes it more fluid. The cross-linking is reversible — slime will slowly become more liquid over days.

Pembersihan

Slime can be disposed of in the trash. Wash hands with soap and water. Rinse beaker with warm water.

Detail

Kategori
Organic Synthesis
Tingkat Kesulitan
Beginner (Middle School)
Durasi
20 menit
Perkiraan Biaya
$5,00
Langkah
6
Bahan
3

Eksperimen Lainnya

Ekstraksi Kafein dari Teh 90 min Esterifikasi Fischer Etil Asetat 90 min Kondensasi Aldol (Dibenzalaseton) 75 min Pembuatan Nilon 6,10 (Trik Tali Nilon) 30 min Pembuatan Sabun dengan Saponifikasi 60 min Preparasi Asetaminofen (Parasetamol) 80 min Produksi Biodiesel dari Minyak Nabati 60 min Sintesis Aspirin (Asam Asetilsalisilat) 90 min Sintesis Luminol 120 min Sintesis Minyak Pisang (Isoamil Asetat) 90 min

Frequently Asked Questions

What is the objective of Sintesis Lendir (PVA Terikat Silang)?
Buat lendir dengan mengikat silang polivinil alkohol (PVA) dengan natrium borat, mendemonstrasikan kimia polimer dan perilaku cairan non-Newton.
How difficult is Sintesis Lendir (PVA Terikat Silang)?
This experiment is rated as Beginner (Middle School). It takes approximately 20 minutes to complete.
What safety precautions are needed for Sintesis Lendir (PVA Terikat Silang)?
Key safety precautions include: Borax is an irritant — avoid eye contact; Wash hands after handling slime; Do not eat the slime.
What materials are needed for Sintesis Lendir (PVA Terikat Silang)?
The main materials required are: Polyvinyl alcohol (PVA) solution, Sodium borate (borax), Food coloring.
What results should I expect from Sintesis Lendir (PVA Terikat Silang)?
A stretchy, squishy slime that flows slowly under gravity but breaks when pulled quickly. More borax makes stiffer slime; less makes it more fluid. The cross-linking is reversible — slime will slowly become more liquid over days.