npsm 새물리 New Physics : Sae Mulli

pISSN 0374-4914 eISSN 2289-0041


Research Paper

New Physics: Sae Mulli 2017; 67: 414-419

Published online April 28, 2017

Copyright © New Physics: Sae Mulli.

Analysis of the Dependence of the Characteristics of a Biodegradable Composite Heat Sink on the Metal Additive

금속 첨가물 종류에 따른 생분해성 복합 플라스틱 히트싱크의 합성 및 특성 분석

Jung Sik JOO1, Hyun Kyoung YANG*1, Gang Hyeon KIM2, Byeong Gyu KIM2, Jun Hyun KIM2

1 Department of LED Convergence Engineering, Pukyong National University, Busan 48547, Korea

2 Busanil Science High School, Busan 49317, Korea


Received: November 1, 2016; Revised: December 27, 2016; Accepted: December 29, 2016

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


A high powered light-emitting diode (LED) chip elevates heat generation, which has led to increased interest in that development of heat radiation materials. A heat-radiation polymer composite composed of metal particle fillers has been researched due to its being easier to manufacture than metal-based heat-radiation materials. Poly lactic acid (PLA) is converted from glucose extracted from the starch of biomass and has been used in many fields as an environmentally friendly resin. In this study, a biodegradable composite plastic was produced by mixing activated carbon, PLA resin, and one metal from among aluminum, copper and iron. The components of metal-additive biodegradable composite plastics were investigated by using energy dispersive X-ray spectroscopy (EDS). The biodegradable composite plastic consisting of aluminum and activated carbon with a 1:1 mass ratio exhibited the highest thermal conductivity, 0.914 W/(m$\cdot$K). Once synthesized, the biodegradable composite plastics were used as heat sinks; as a result of them the temperature of each LED chip did not reach 50 $^{\circ}$C after 30 min of LED operation. Our results suggest that biodegradable composite plastics may replace current heat sinks.

Keywords: PLA, Biodegradation, LED heatsink

LED의 고출력화에 따라 발생되는 높은 열로 인해 방열소재에 대한 관심이 집중되고 있다. 금속보다는 제조하기 쉬운 방열소재로 금속 입자를 필러로 한 고분자 복합재료의 방열소재가 연구되고 있다. Poly lactic acid (PLA)는 바이오 매스에서 녹말을 분리하여 생성된 포도당을 발효시켜 얻은 젖산을 고분자화하여 만들어지는 친환경 수지로 다양한 분야에서 사용되고 있다. 본 연구에서는 알루미늄, 구리, 철을 각각 사용하여 활성탄과 PLA수지를 혼합하여 생분해성 복합 플라스틱을 제조하였다. EDS분석으로 생분해성 복합 플라스틱의 구성원소를 확인하였다. 열전도율은 알루미늄과 활성탄의 질량비가 1:1로 혼합된 생분해성 복합 플라스틱이 0.914 W/(m$\cdot$K)으로 가장 높았다. 각각 금속의 생분해성 복합 플라스틱을 히트싱크로 사용하였을 때 LED가 작동한지 30분 후에도 LED칩의 온도가 50 $^{\circ}$C를 넘지 않으므로 히트싱크로 적합하게 작동됨이 확인되었다.

Keywords: PLA, 생분해, LED 히트싱크

Stats or Metrics

Share this article on :

Related articles in NPSM