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Related Concept Videos

Phase Transitions02:31

Phase Transitions

Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to occupy...
States of Matter and Phase Changes00:59

States of Matter and Phase Changes

The internal energy of a substance—the total kinetic energy of all its molecules and the potential energy of their associated forces—depends on the strength of the intermolecular forces in the condensed phases and the pressure exerted on the substance. The internal energy of a substance is the highest in the gaseous state, the lowest in the solid state, and intermediate in the liquid state. Phase transitions are caused by changes in physical conditions, such as temperature and pressure, that...
Mechanism of heat transfer01:19

Mechanism of heat transfer

Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
Phase Changes01:19

Phase Changes

Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
Deactivation Processes: Jablonski Diagram01:25

Deactivation Processes: Jablonski Diagram

Luminescence, the emission of light by a substance that has absorbed energy, is a process that involves the interaction of molecules with light. The energy-level diagram, or Jablonski diagram, is a graphical representation of these interactions, illustrating the various states and transitions a molecule can undergo. In a typical Jablonski diagram, the lowest horizontal line represents the ground-state energy of the molecule, which is usually a singlet state. This state represents the energies...
Phase Transitions01:21

Phase Transitions

A phase transition is the process in which a substance changes from one state of matter to another, like from a solid to a liquid, liquid to gas, or vice versa, at a specific temperature and under given pressure conditions. This change is spontaneous and is affected by alterations in temperature and pressure. These parameters impact the strength of the forces between molecules (intermolecular forces) in the substance.During a phase transition, both the initial and final phases of the substance...

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Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties
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Photo-thermal effects initiate multi-level energy conversion in "solid-solid" phase-changing fibers.

Da Bao1, Xin Zhang1, Xinbin Ji1

  • 1School of Textile and Materials Engineering, Dalian Polytechnic University, #1 Qing gong yuan, Ganjingzi, Dalian 116034, Liaoning, PR China.

International Journal of Biological Macromolecules
|September 28, 2024
PubMed
Summary

Researchers developed an intelligent fiber that stores solar energy and regulates temperature. This innovative textile fiber converts light into heat, stores it, and releases it, enhancing thermal insulation for wearers.

Keywords:
Chitosan fiberMulti-level energy conversionSmart textile

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Area of Science:

  • Materials Science
  • Textile Engineering
  • Nanotechnology

Background:

  • Current textiles rely on passive heat barriers for thermal insulation.
  • Intelligent fibers with energy storage and temperature control are revolutionizing textile technology.

Purpose of the Study:

  • To fabricate a fully intelligent energy storage fiber integrating photo-thermal effects and phase change materials.
  • To enable multi-level energy conversion: Optical energy - Thermal energy - Phase transition energy - Thermal energy.

Main Methods:

  • Integration of photo-thermal effect and phase change energy storage materials onto a fiber.
  • Utilizing copper nanoparticles (CuNPs) for photo-thermal conversion.
  • Inducing spatial conformational change in solid-solid phase change material for heat storage.

Main Results:

  • Fabrication of a hybrid intelligent fiber with enhanced mechanical properties.
  • Achieved a high phase transition enthalpy of 49.75 J g-1.
  • Demonstrated a suitable phase transition temperature range (20.19-30.21 °C) for human body comfort.
  • Confirmed durability and systematic four-stage energy conversion (light to heat to phase transition to heat).

Conclusions:

  • The developed intelligent fiber efficiently converts and stores solar energy for thermal regulation.
  • This innovation offers significant potential for advancing smart fiber technology and wearable thermal management solutions.