Tổng Hợp Slime (PVA Khâu Mạch)

Tạo chất lỏng phi Newton bằng cách khâu mạch polyvinyl ancol

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

Mục tiêu

Tạo slime bằng cách khâu mạch polyvinyl ancol (PVA) với natri borat, minh họa hóa học polyme và tính chất chất lỏng phi Newton.

Bối cảnh

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.

Cảnh báo an toàn

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

PPE cần thiết

goggles

Vật liệu

  • 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

Thiết bị

250 mL beaker Stirring rod Measuring cylinder

Quy trình

1

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

1 phút
2

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

1 phút
3

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

3 phút
4

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

5 phút Wash hands afterward
5

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

5 phút
6

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

5 phút

Kết quả dự kiến

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.

Dọn dẹp

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

Frequently Asked Questions

What is the objective of Tổng Hợp Slime (PVA Khâu Mạch)?
Tạo slime bằng cách khâu mạch polyvinyl ancol (PVA) với natri borat, minh họa hóa học polyme và tính chất chất lỏng phi Newton.
How difficult is Tổng Hợp Slime (PVA Khâu Mạch)?
This experiment is rated as Beginner (Middle School). It takes approximately 20 minutes to complete.
What safety precautions are needed for Tổng Hợp Slime (PVA Khâu Mạch)?
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 Tổng Hợp Slime (PVA Khâu Mạch)?
The main materials required are: Polyvinyl alcohol (PVA) solution, Sodium borate (borax), Food coloring.
What results should I expect from Tổng Hợp Slime (PVA Khâu Mạch)?
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.