다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

비만아 부모의 돌봄 경험: q 방법론

A review of shape memory alloy research, applications and opportunities

Electrospinning is a versatile and viable technique for generating ultrathin fibers. Remarkable progress has been made with regard to the development of electrospinning methods and engineering of electrospun nanofibers to suit or enable various applications. We aim to provide a comprehensive overview of electrospinning, including the principle, methods, materials, and applications. We begin with a brief introduction to the early history of electrospinning, followed by discussion of its principle and typical apparatus. We then discuss its renaissance over the past two decades as a powerful technology for the production of nanofibers with diversified compositions, structures, and properties. Afterward, we discuss the applications of electrospun nanofibers, including their use as "smart" mats, filtration membranes, catalytic supports, energy harvesting/conversion/storage components, and photonic and electronic devices, as well as biomedical scaffolds. We highlight the most relevant and recent advances related to the applications of electrospun nanofibers by focusing on the most representative examples. We also offer perspectives on the challenges, opportunities, and new directions for future development. At the end, we discuss approaches to the scale-up production of electrospun nanofibers and briefly discuss various types of commercial products based on electrospun nanofibers that have found widespread use in our everyday life.

Electrospinning and Electrospun Nanofibers: Methods, Materials, and Applications

In this article, epoxy shape-memory polymer (ESMP) reinforced with 1 wt % thermally reduced graphite oxide (TrGO) was fabricated by solution blending and three-roll mill (TRM) mixing, respectively. Both blending techniques allowed a uniform TrGO dispersion in ESMP matrix, and the TRM mixing lead to an exfoliation of the TrGO worms. Compared with pristine ESMP, the TrGO/ESMP composites showed 36.4–41.1% increase in Young's modulus and 38.1–44.1% improvement in tensile strength. The TrGO/ESMP composite fabricated by TRM mixing had a T5% (the temperature where the material lost 5% of its initial weight) 16.4°C higher than pure ESMP. Compared with pure ESMP, a significant improvement of recovery force by 84.4% and 311.1% was obtained by TrGO/ESMP composite fabricated by solution blending and TRM mixing, respectively. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42502.

Epoxy shape‐memory polymer reinforced by thermally reduced graphite oxide: Influence of processing techniques

A baseline-free approach of locating defect based on mode conversion and the reciprocity principle of Lamb waves.

4D printing is an advanced manufacturing technology that combines the convenience of additive manufacturing and uses stimuli-responsive materials, which has great application potentials in the field of smart structures. Using electroactive shape memory polymer composites (SMPCs), smart devices with remote control capabilities without a heat source can be prepared by 4D printing. In this work, a variety of 4D printed structures based on PLA/CNT composites were fabricated by FDM. Electroactive SMPC filaments with different CNT contents were prepared, and their electrical, thermal, and shape-memory properties were investigated. Moreover, a series of 2D and 3D printed complex structures were designed and manufactured to realize their shape recovery behavior under the electrical field. The relationship between the electroactive shape-memory performance of 4D printed structures, structural design, and printing parameters was obtained. This work could provide a new feasible way for the design and manufacturing of electroactive devices in the future. 

4D printing of electroactive shape-changing composite structures and their programmable behaviors

Thermo-mechanical behavior prediction of shape memory polymer based on the multiplicative decomposition of the deformation gradient

This work presented an indirect method to monitor the deformation of the flexible variable camber wing using attached fiber Bragg gratings. To measure the transverse strains resulting from deformat...

Yanju Liu

Papers

Epoxy shape‐memory polymer reinforced by thermally reduced graphite oxide: Influence of processing techniques

A baseline-free approach of locating defect based on mode conversion and the reciprocity principle of Lamb waves.

4D printing of electroactive shape-changing composite structures and their programmable behaviors

Thermo-mechanical behavior prediction of shape memory polymer based on the multiplicative decomposition of the deformation gradient

A new deformation monitoring method for a flexible variable camber wing based on fiber Bragg grating sensors