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Related Concept Videos

Thermal expansion and Thermal stress: Problem Solving01:27

Thermal expansion and Thermal stress: Problem Solving

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San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
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Conduction, Convection and Radiation: Problem Solving01:20

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There are three methods by which heat transfer can take place: conduction, convection, and radiation. Each method has unique and interesting characteristics, but all three have two things in common: they transfer heat solely because of a temperature difference; and the greater the temperature difference, the faster the heat transfer.
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Thermal Stress01:09

Thermal Stress

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If the temperature of an object is changed while it is prevented from expanding or contracting, the object is subjected to stress. The stress is compressive if the object expands in the absence of constraint and tensile if it contracts. This stress resulting from temperature change is known as thermal stress. It can be quite large and can cause damage. To avoid this stress, engineers may design components so they can expand and contract freely. For instance, on highways, gaps are deliberately...
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Thermal Strain01:19

Thermal Strain

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Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
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Theory of Metallic Conduction01:17

Theory of Metallic Conduction

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The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
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Heating and Cooling Curves02:44

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When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
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Conductive Structural Colored Cotton Fabrics with Nonangle-Dependent Colors and Dynamic Thermal Management.

Luyao Wei1,2, Guizhen Lin1, Jie Liu1

  • 1College of Textiles and Clothing, Institute of Functional Textiles and Advanced Materials, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China.

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Researchers developed a new method for creating conductive structural colored cotton fabrics. These fabrics offer vibrant, non-angle-dependent colors and dynamic thermal management for multifunctional textiles.

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Area of Science:

  • Materials Science
  • Textile Engineering
  • Nanotechnology

Background:

  • Structural color textiles offer eco-friendly dyeing and lasting color fastness.
  • Existing research primarily focuses on color and stability, overlooking multifunctionality.
  • Demand for advanced textiles with added functionalities like thermal management is rising.

Purpose of the Study:

  • To develop conductive structural colored cotton fabrics with non-angle-dependent colors.
  • To integrate dynamic thermal management capabilities into these advanced textiles.
  • To create a bifunctional textile suitable for electrothermal applications.

Main Methods:

  • Coating polymethyl methacrylate (PMMA) nanospheres with polydopamine (PDA) for enhanced color.
  • Self-assembling PMMA@PDA nanospheres onto MXene-modified cotton fabric via blade coating.
  • Evaluating color fastness, softness, and electrothermal performance.

Main Results:

  • Successfully prepared conductive structural colored cotton fabrics with non-angle-dependent colors.
  • The textiles exhibited good electrothermal performance and dynamic thermal management.
  • The structural color and fabric properties remained durable after washing and friction tests.

Conclusions:

  • A simple and effective method for producing bifunctional conductive structural colored textiles was established.
  • The developed textiles offer a novel solution for advanced electrothermal applications.
  • This approach paves the way for multifunctional textiles with enhanced aesthetic and functional properties.