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| 1 | 形状记忆聚合物复合材料研究进展显示文摘形状记忆聚合物(Shape memory polymer,SMP)具有超高的形状回复率、形状记忆转变温度易调节、易赋形、密度小和成本低等优点,近年来受到广泛关注。但因力学性能较差、响应方式单一等不足,严重制约了它的应用。通过复合功能性填料可有效改善SMP的力学性能、形状记忆性能、导电和导热性能、丰富SMP响应方式,以满足应用需要。介绍形状记忆聚合物复合材料(Shape memory polymercomposite,SMPC)近些年的研究进展,从填料对SMP力学性能及响应方式的影响角度分别对力学增强型SMPC、电致型SMPC、磁致型SMPC和生物功能型SMPC进行论述,分析SMPC的应用前景及面临的挑战。 | 王恩亮 董余兵 | 2018 | 浙江理工大学学报(自然科学版)2018，39，1： | 6 |
| 2 | Buckling-controlled two-way shape memory effect in a ring-shaped bilayer显示文摘Shape memory polymers(SMPs)usually have a one-way shape memory effect.In this paper,an easy-operating method to realize a two-way shape memory effect was demonstrated in a ring-shaped bilayer structure where the two layers are SMPs with different thermal transition temperatures.By designing specific thermomechanical processes,the mismatched deformation between the two layers leads to a morphology change of ring-shaped bilayer structures from a smooth ring to a gear-like buckling shape under cooling and a reversible recovery to the smooth shape under heating.Such a morphology change is ascribed to occurrence and recovery of thermoelastic buckling.This method was validated by finite element simulation.We experimentally investigated the influence of pre-strain on buckling,and it was found that both the buckling occurrence and recovery temperature vary with pre-strain.Furthermore,considering a ring-shaped SMP-SMP bilayer structure,finite element analysis was conducted to study the influence of film thickness and modulus ratio of two layers on buckling behavior.The results showed that the critical buckling wavelength was greatly influenced by film thickness and modulus ratio.W e made a theoretical analysis that accorded well with the numerical results. | Hao Li Xiaoyan Liang Weibin Song | 2019 | Acta Mechanica Sinica2019，35，6： | 3 |
| 3 | 形状记忆聚氨酯及其非织造材料成型方法研究进展显示文摘非织造材料作为一种通过物理或化学方法制成的具有工程结构完整性的纤维集合体,是一种源于纺织技术的功能性纤维材料,目前已广泛应用于医疗卫生、过滤分离和土木建筑等各个领域。随着非织造材料的广泛应用,其结构的优化与性能的提高显得尤为重要。形状记忆聚氨酯作为一种典型的形状记忆高分子材料,具有易加工、形变量大、形状记忆效果突出和多样化刺激方式等优点,广泛应用于医疗卫生、航空航天和纺织服装等领域。将形状记忆聚氨酯与非织造成型技术结合,不仅可以保持非织造材料原有特性,还可以赋予其形状记忆功能,为非织造技术的创新与升级提供驱动力,同时也为形状记忆材料的高质应用提供研究方向。目前形状记忆聚氨酯非织造材料的成型方法主要包括共混应用法、直接成网法以及后整理应用法。其中共混应用法包括复合纤维成网和共混纺丝,其优势在于纤维或聚合物之间可充分混合,形状记忆效果均匀;直接成网法包括静电纺丝法和熔喷法,静电纺丝法目前研究最广泛,其优势在于所得纳米级非织造材料质量轻、孔径多且成本低,可用于制备高性能复合材料。熔喷法形状记忆聚氨酯非织造材料结构蓬松、纤网孔隙小且孔隙率大,可广泛应用于吸油材料、过滤材料和隔音材料等领域;后整理应用法包括涂敷及形状记忆聚氨酯的溶液形式应用,其优势在于操作简便、成本低,且形状记忆效果优良。目前形状记忆聚氨酯非织造材料的应用依然处于实验室研究阶段,要实现产业化、功能化的应用还需要进一步的探索与研究。本文阐述了形状记忆聚氨酯的记忆机理、分类和应用领域等,分析了形状记忆聚氨酯非织造材料成型方法的研究进展,为形状记忆聚氨酯非织造材料今后的研发与高质应用提供了参考。 | 孙焕惟 张恒 李霞 甄琪 崔景强 钱晓明 张一风 | 2021 | 材料导报2021，35，23： | 2 |
| 4 | Effect of Poly(ε-caprolactone-b-tetrahydrofuran)Triblock Copolymer Concentration on Morphological,Thermal and Mechanical Properties of Immiscible PLA/PCL Blends显示文摘In this study a low molecular weight triblock copolymer derived fromε-caprolactone and tetrahydrofuran was used as a non-reactive compatibilizer of immiscible PLA/PCL blends.Ternary blends with 0,1.5 wt%,3 wt%and 5 wt% copolymer and about 75 wt%PLA were prepared by single screw extrusion and characterized by scanning electron microscopy(SEM),differential scanning calorimetry(DSC),dynamic mechanical analysis(DMA),tensile and Izod impact testing.SEM micrographs showed that the size of the dispersed PCL domains was practically constant regardless of copolymer concentration.This result can be explained by the low shear rate employed during processing step and a decrease of PCL viscosity by presence of the triblock copolymer.However,when the copolymer concentration increased,strain at break of PLA/PCL blends also increased.PLA/PCL blend with 0 wt% copolymer presented 2%strain at break,whereas PLA/PCL blend with 5 wt%copolymer exhibited 90%. | Paula do Patrocínio Dias Marcelo Aparecido Chinelatto | 2019 | Journal of Renewable Materials2019，7，2： | 0 |
| 5 | 聚降冰片烯的电热双驱动形状记忆性能显示文摘以聚降冰片烯(PNB)为基体,分别加入导电炭黑(CB)和碳纤维(CF)制备PNB复合材料,通过对材料进行电性能表征及差示扫描量热分析仪、动态力学性能频谱仪等分析,探究PNB复合材料的电性能、力学性能和电热双驱动形状记忆效应。结果表明,导电CB和CF的添加量达到一定时,PNB复合材料内部均会形成不同程度的导电通路;同导电CB相比,CF自身具有较高的强度和模量,使得复合材料具有更加优异的力学性能;加入导电CB后形成的导电网络更为完善,少量的导电CB在保证复合材料具有优异力学性能的同时兼具良好的形状记忆性能。 | 张庆红 宫小文 王功亮 温新龙 史新妍 | 2022 | 高分子材料科学与工程2022，38，2： | 0 |
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