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201.
金属基板由于其良好的散热性及尺寸稳定性,一直受到业界的高度关注和重视,近年来更逐渐由单面向双面及高多层金属夹芯技术发展。本文就铝基夹芯盲埋孔制作工艺进行了可行性探讨,并通过真空压胶技术和铝基表面复合处理工艺有效解决了铝基结合力差及超厚铝基同心圆填胶困难等业界常见的技术难题,极大提升了品质良率,满足了客户的特种需求。 相似文献
202.
Changes in the intra- and inter-fibrillar structure of lyocell (TENCEL®) fibers caused by NaOH treatment 总被引:1,自引:1,他引:0
Hale Bahar Öztürk Antje Potthast Thomas Rosenau Mohammad Abu-Rous Bill MacNaughtan K. Christian Schuster John R. Mitchell Thomas Bechtold 《Cellulose (London, England)》2009,16(1):37-52
Some effects of NaOH treatment at concentrations of up to 8 M on (1) the porous structure, (2) the degree of swelling, (3)
carboxyl content using methylene blue sorption and 9H-fluoren-2-yl-diazomethane (FDAM) methods, (4) dyeing, (5) the molecular
weight distribution measured by gel permeation chromatography (GPC), (6) crystallinity determined by wide angle X-ray diffraction
(WAXD) and (7) the tensile properties of lyocell fibers were investigated. The porous structure of fibers was visualised using
fluorescence microscopy and transmission electron microscopy (TEM) on fiber cross-sections and was also studied by inversion
size exclusion chromatography (ISEC). Mean pore diameter and pore area of fibers were not changed by NaOH treatments. The
pore volume increased above 2.5 M NaOH. NaOH-treated samples showed higher dye uptake, higher swelling, but lower carboxyl
and moisture content and increased crystallinity. As the NaOH concentration increased, the depth of colour following dyeing
with C.I. Direct Red 81 also increased due to deep penetration of alkali into the fiber. In general, fiber properties were
distinctly different in the ranges 0 to approximately 3 and 3–8 M NaOH.
A part of this paper was presented at the 5th Central European Conference 2007, Fiber Grade Polymers, Chemical Fibers and
Special Textiles, Krakow-Bielsko-Biala, Poland, 5–8 September 2007.
Hale Bahar ?ztürk, Antje Potthast, Thomas Rosenau, Bill MacNaughtan, John R. Mitchell, Thomas Bechtold—Members of European
Polysaccharide Network of Excellence (EPNOE), . 相似文献
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Jun Tao Ying Tian Dong Chen Wei Lu Kun Chen Chaoli Xu Dr. Lei Bao Prof. Bin Xue Tiankuo Wang Prof. Zhaogang Teng Prof. Lianhui Wang 《Angewandte Chemie (International ed. in English)》2023,62(7):e202216361
Herein, we report, for the first time, a unique stiffness-transformable manganese oxide hybridized mesoporous organosilica nanoplatform (MMON) for enhancing tumor therapeutic efficacy. The prepared MMONs had a quasi-spherical morphology and were completely transformed into soft bowl-like nanocapsules in the simulated tumor microenvironment through the breakage of Mn−O bonds, which decreased their Young's modulus from 165.7 to 84.5 MPa. Due to their unique stiffness transformation properties, the MMONs had reduced macrophage internalization, improved tumor cell uptake, and enhanced penetration of multicellular spheroids. In addition, in vivo experiments showed that the MMONs displayed a 3.79- and 2.90-fold decrease in non-specific liver distribution and a 2.87- and 1.83-fold increase in tumor accumulation compared to their soft and stiff counterparts, respectively. Furthermore, chlorin e6 (Ce6) modified MMONs had significantly improved photodynamic therapeutic effect. 相似文献