The Hidden Science Behind Non-Stick Pans

课文

1. Non-stick coatings like Teflon are made from polytetrafluoroethylene (PTFE), a synthetic polymer.

   特氟龙等不粘涂层由聚四氟乙烯（PTFE）这种合成聚合物制成。

2. Its molecular structure features strong carbon–fluorine bonds that resist heat, chemicals, and adhesion.

   其分子结构含有牢固的碳-氟键，耐高温、耐化学腐蚀且不易粘附。

3. During manufacturing, PTFE is sprayed onto aluminum surfaces and baked at high temperatures.

   制造过程中，PTFE被喷涂在铝表面，并经高温烘烤。

4. A smooth, inert layer forms that prevents food molecules from bonding to the metal surface.

   形成一层光滑、惰性的薄膜，阻止食物分子与金属表面结合。

5. Newer ceramic coatings use silica nanoparticles instead, offering similar slipperiness without fluorine.

   新型陶瓷涂层则采用二氧化硅纳米颗粒，同样顺滑却不含氟。

6. These alternatives avoid potential concerns about PTFE breakdown above 500°F (260°C).

   这类替代品可避免PTFE在500°F（260°C）以上分解带来的潜在隐患。

7. However, both types wear down over time if scratched by metal utensils or overheated repeatedly.

   但若长期用金属厨具刮擦或反复过热，两类涂层都会逐渐磨损。

8. Proper care—like using wooden spoons and medium heat—extends coating life by two to three years.

   正确使用——如选用木勺、控制中火——可延长涂层寿命两到三年。

9. Scientists continue testing nanocomposites that self-heal minor surface damage during cooking.

   科学家正持续测试能在烹饪中自修复微小表面损伤的纳米复合材料。

10. Ultimately, non-stick technology merges materials science, thermal engineering, and everyday safety.

    归根结底，不粘技术融合了材料科学、热工工程与日常安全。