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1. chinaXiv:201705.00431 [pdf]

Nanostructures of Stereocomplex Polylactide in Poly[l-lactide] Doped with Poly[d-lactide]

Huang, W [Huang, Wei][ 1,4 ]; Luo, XZ [Luo, Xian-Zi][ 1 ]; Wang, BJ [Wang, Bing-Jie][ 1 ]; Wei, WF [Wei, Wen-Feng][ 1 ]; Chen, P [Chen, Peng][ 1 ]; Gu, Q [Gu, Qun][ 1 ]; de Vos, S [de Vos, Sicco][ 2 ]; Wang, RY [Wang, Ru-Yin][ 3 ]; Joziasse, CAP [Joziasse, Cornelis A. P.][ 2 ]

Nanostructures of stereocomplex polylactide [sc-PLA] are obtained and studied in poly[l-lactide] [PLLA] doped with a low amount of poly[d-lactide] [PDLA] during successive melt-quenching, extrusion, spinning, and drawing processes corresponding to quiesce

submitted time 2017-05-02 Hits675Downloads420 Comment 0

2. chinaXiv:201705.00392 [pdf]

Functional Organophosphorous Ionic Liquids: Synthesis and Application in PMMA Plasticization

Gu, M [Gu, Miao][ 1 ]; Gu, Q [Gu, Qun][ 2 ]; Chen, P [Chen, Peng][ 2 ]; Zhao, LL [Zhao, Lingling][ 1 ]; Liang, HZ [Liang, Hongze][ 1 ]

Two kinds of organophosphorous-functionalized ionic liquid [ILs] were synthesized and confirmed by FT-IR, HRMS and NMR. The ionic liquids have good thermostability and the viscosity decrease with the increasing temperature. They were used as plasticizer f

submitted time 2017-05-02 Hits629Downloads386 Comment 0

3. chinaXiv:201705.00046 [pdf]

Evaluation of PHBHHx and PHBV/PLA fibers used as medical sutures

He, Y [He, Yu][ 1 ]; Hu, ZW [Hu, Zhiwei][ 2 ]; Ren, MD [Ren, Mengda][ 1 ]; Ding, CK [Ding, Changkun][ 3 ]; Chen, P [Chen, Peng][ 4 ]; Gu, Q [Gu, Qun][ 4 ]; Wu, Q [Wu, Qiong][ 1,5,6 ]
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

Two types of fibers were prepared by using bio- based materials: a mono-filament made from poly(3- hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) and a multi-filament made from poly(3-hydroxybutyrate-co-3- hydroxyvalerate) (PHBV) and polylactic acid (PLA) blend. The two fibers were evaluated for mechanical properties, biocompatibility and degradability for the potential appli- cation as medical sutures. The PHBHHx fiber showed remarkable biocompatibility by H.E. Stainning, with very little impact to the surrounding tissues. The degradation of the fiber was observed by SEM after implantation for 36 weeks, and the major degradation product was detected after 96 weeks. Consistently, the PHBHHx fiber main- tained more than half of the mechanical properties after 96 weeks. The other fiber was prepared by twisting PHBV/PLA blend strands to a bunch, and showed high biocom- patibility and relatively high degradability. The bunched structure loosed after 36 weeks of implantation. These low- cost and easily prepared fibers have great potential in medical applications, since they could avoid the formation of fibrous capsule, reduce the size of scar, and degrade into non-toxic and even beneficial products.

submitted time 2017-05-02 Hits1450Downloads836 Comment 0

4. chinaXiv:201704.00068 [pdf]

Chlorobenzene vapor assistant annealing method for fabricating high quality perovskite films

He, Y; Hu, ZW; Ren, MD; Ding, CK; Chen, P; Gu, Q; Wu, Q

In this study, chlorobenzene (CB) vapor assistant annealing (VAA) method is employed to make high quality perovskite films and produce high efficiency CH3NH3PbI3-xClx perovskite solar cells. The perovskite films made by this method present several advanta

submitted time 2017-04-06 Hits1011Downloads647 Comment 0

5. chinaXiv:201704.00067 [pdf]

Evaluation of PHBHHx and PHBV/PLA fibers used as medical sutures

He, Y; Hu, ZW; Ren, MD; Ding, CK; Chen, P; Gu, Q; Wu, Q
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

Two types of fibers were prepared by using bio-based materials: a mono-filament made from poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) and a multi-filament made from poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and polylactic acid (PLA) b

submitted time 2017-04-06 Hits1116Downloads667 Comment 0

6. chinaXiv:201605.01575 [pdf]

FINE MAGNETIC STRUCTURE AND ORIGIN OF COUNTER-STREAMING MASS FLOWS IN A QUIESCENT SOLAR PROMINENCE

Shen, Yuandeng; Liu, Yu; Liu, Ying D.; Chen, P. F.; Su, Jiangtao; Xu, Zhi; Liu, Zhong
Subjects: Geosciences >> Space Physics

We present high-resolution observations of a quiescent solar prominence that consists of a vertical and a horizontal foot encircled by an overlying spine and has ubiquitous counter-streaming mass flows. While the horizontal foot and the spine were connected to the solar surface, the vertical foot was suspended above the solar surface and was supported by a semicircular bubble structure. The bubble first collapsed, then reformed at a similar height, and finally started to oscillate for a long time. We find that the collapse and oscillation of the bubble boundary were tightly associated with a flare-like feature located at the bottom of the bubble. Based on the observational results, we propose that the prominence should be composed of an overlying horizontal spine encircling a low-lying horizontal and vertical foot, in which the horizontal foot consists of shorter field lines running partially along the spine and has ends connected to the solar surface, while the vertical foot consists of piling-up dips due to the sagging of the spine fields and is supported by a bipolar magnetic system formed by parasitic polarities (i.e., the bubble). The upflows in the vertical foot were possibly caused by the magnetic reconnection at the separator between the bubble and the overlying dips, which intruded into the persistent downflow field and formed the picture of counter-streaming mass flows. In addition, the counter-streaming flows in the horizontal foot were possibly caused by the imbalanced pressure at the both ends.

submitted time 2016-05-12 Hits1594Downloads956 Comment 0

7. chinaXiv:201605.01557 [pdf]

A TWO-RIBBON WHITE-LIGHT FLARE ASSOCIATED WITH A FAILED SOLAR ERUPTION OBSERVED BY ONSET, SDO, and IRIS

Cheng, X.; Hao, Q.; Ding, M. D.; Liu, K.; Chen, P. F.; Fang, C.; Liu, Y. D.
Subjects: Geosciences >> Space Physics

Two-ribbon brightenings are one of the most remarkable characteristics of an eruptive solar flare and are often used to predict the occurrence of coronal mass ejections (CMEs). Nevertheless, it was recently called into question whether all two-ribbon flares are eruptive. In this paper, we investigate a two-ribbon-like white-light (WL) flare that is associated with a failed magnetic flux rope (MFR) eruption on 2015 January 13, which has no accompanying CME in the WL coronagraph. Observations by the. Optical and Near-infrared Solar Eruption Tracer and the Solar Dynamics Observatory reveal that with the increase of the flare emission and the acceleration of the unsuccessfully erupting MFR, two isolated kernels appear at the WL 3600 angstrom passband and quickly develop into two elongated ribbon-like structures. The evolution of the WL continuum enhancement is completely coincident in time with the variation of Fermi hard X-ray 26-50 keV flux. An increase of continuum emission is also clearly visible at the whole FUV and NUV passbands observed by the. Interface Region Imaging Spectrograph. Moreover, in one WL kernel, the Si IV, C II, and Mg II h/k lines display significant enhancement and non-thermal broadening. However, their Doppler velocity pattern is location-dependent. At the strongly bright pixels, these lines exhibit a blueshift, while at moderately bright ones, the lines are generally redshifted. These results show that the failed MFR eruption is also able to produce a two-ribbon flare and high-energy electrons that heat the lower atmosphere, causing the enhancement of the WL and FUV/NUV continuum emissions and chromospheric evaporation.

submitted time 2016-05-12 Hits1106Downloads688 Comment 0

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