厚朴酚基形状记忆环氧树脂的制备及性能研究

doi:10.11896/cldb.24020002

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Abstract Shape memory polymers (SMPs) can rapidly revert to a predetermined state upon stimulation from external factors (temperature, electric current and magnetic field), which found extensive applications in biomedicine, smart textiles, sensors and various other fields. Recently, the research on bio-based shape memory polymers has gained significant attention due to the global energy crisis and worsening environmental issues. A low viscosity bio-based epoxy oligomer (P-ME-EP-n) with a shear viscosity 0.12 Pa·s at 25 ℃ and an average polymerization degree about 0.86 was synthesized from biomass compound magnolol and glycol diglycidyl ether. It was found that the impact strength of P-ME-EP-n/DDM (5.6 kJ/m²) prepared using DDM (4, 4’-diaminodiphenylmethane) as curing agent was 56% higher than that of cured E51/DDM (3.6 kJ/m²). P-ME-EP-n/DDM’s relaxation time at 100 ℃ (T_g of 49 ℃) is 14 s, where most of the reported shape memory epoxy resins rela-xation time at T_g+ 50 ℃ ranged within ten to thousands of seconds. The shape fixation rate (R_f) and shape recovery rate (R_r) measured for four shape memory cycles were all greater than 99.0% and 98.8%, respectively. Additionally, the samples of humanoid and floriform prepared in this research vividly showed shape memory phenomena such as “bending” and “flowering”. These results manifest that P-ME-EP-n/DDM is both environmentally friendly and has excellent shape memory performance. The research work in this paper provides a new idea for the design and development of bio-based shape memory polymers.

Key words： bio-based biphenyl epoxy resin shape memory polymer low viscosity stress relaxation

Published: 10 June 2025 Online: 2025-05-29

CLC number:

TQ323

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	Articles by authors
	ZHOU Tao
	ZHANG Xiaoqing
	CHEN Jiarong
	YANG Chenyi
	LEI Caihong

Cite this article:

ZHOU Tao,ZHANG Xiaoqing,CHEN Jiarong, et al. Preparation and Properties of Magnolol-based Shape Memory Epoxy Resin[J]. Materials Reports, 2025, 39(11): 24020002-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24020002 OR https://www.mater-rep.com/EN/Y2025/V39/I11/24020002

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