尼龙6,10的制备（尼龙绳技巧）

从界面拉出连续的尼龙丝

Organic Synthesis Intermediate (High School) 30 分钟 ~$18.00

目标

在两种不混溶溶液的界面合成尼龙6,10，并从烧杯中拉出连续丝线。

背景

The nylon rope trick is a dramatic demonstration of interfacial polymerization. When a solution of hexamethylenediamine (aqueous) is layered with sebacoyl chloride (in hexane), nylon forms at the interface. The polymer film can be continuously pulled out as a thread or rope.

安全警告

  • Hexane is highly flammable — no open flames
  • Sebacoyl chloride is corrosive and moisture-sensitive
  • Hexamethylenediamine is an irritant
  • Work in a fume hood

所需PPE

goggles gloves lab_coat

材料

  • Hexamethylenediamine (3 g)
    Dissolved in 50 mL water
  • Sebacoyl chloride (2 mL)
    In 50 mL hexane
  • Sodium hydroxide (NaOH) (1 g)
    Added to the aqueous layer
  • Hexane (50 mL)
    Solvent for acid chloride

设备

250 mL beaker Forceps or glass rod Paper towel

步骤

1

Prepare the aqueous solution: dissolve 3 g hexamethylenediamine and 1 g NaOH in 50 mL water in the beaker.

3 分钟 Irritant — avoid contact
2

Carefully layer the sebacoyl chloride/hexane solution on top of the aqueous solution. Do not mix.

3 分钟 Work in fume hood
3

Observe the nylon film forming at the interface between the two layers.

2 分钟
4

Using forceps, gently pull the nylon film from the center of the interface. A continuous strand should follow.

5 分钟
5

Wind the nylon strand around a glass rod, continuously pulling from the interface.

10 分钟
6

Rinse the collected nylon with water and blot dry. Examine the fiber properties.

5 分钟

预期结果

A continuous strand of nylon can be pulled from the interface for several meters. The polymer is white, slightly elastic, and strong. The reaction continues as long as both reagents are present.

清理

Allow remaining solution to react. Dispose of hexane waste in organic solvent waste. Neutralize the aqueous layer. Rinse all glassware.

详情

类别
Organic Synthesis
难度
Intermediate (High School)
时长
30 分钟
预估费用
$18.00
步骤数
6
材料
4

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Frequently Asked Questions

What is the objective of 尼龙6,10的制备（尼龙绳技巧）?
在两种不混溶溶液的界面合成尼龙6,10，并从烧杯中拉出连续丝线。
How difficult is 尼龙6,10的制备（尼龙绳技巧）?
This experiment is rated as Intermediate (High School). It takes approximately 30 minutes to complete.
What safety precautions are needed for 尼龙6,10的制备（尼龙绳技巧）?
Key safety precautions include: Hexane is highly flammable — no open flames; Sebacoyl chloride is corrosive and moisture-sensitive; Hexamethylenediamine is an irritant.
What materials are needed for 尼龙6,10的制备（尼龙绳技巧）?
The main materials required are: Hexamethylenediamine, Sebacoyl chloride, Sodium hydroxide (NaOH), Hexane.
What results should I expect from 尼龙6,10的制备（尼龙绳技巧）?
A continuous strand of nylon can be pulled from the interface for several meters. The polymer is white, slightly elastic, and strong. The reaction continues as long as both reagents are present.