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In this paper, at first the term and the technical significance of the degree of polymerization (DP) of cellulose insulation is explained. Factors influencing the DP of new, unused insulation products are detailed. An overview of commonly used DP measuring techniques and standards is given. Depending on the method, the measured DP value of cellulose insulation can vary considerably. The DP loss at...
This paper provides a PTFE/LSEG solid self-lubricating composite that exhibits very low friction coefficient and wear rate. In present study, the influences of the content of expanded graphite with nanoscale lamellar-structure (LSEG) in PTFE/LSEG composite on tribological properties were carried out. Six compounds of PTFE with LSEG (0-30 wt. %) were evaluated on MMU-5G friction and wear tester. The...
In this paper, we demonstrate and analyze the solubility and distribution of dried europium(III)-chelate dyed nanoparticles in mini channels of milled polystyrene (PS) cartridges. The particular objective for the study is to measure quantitatively the efficiency of the resuspension of dried nanoparticles from the surface of PS channels and to determine the homogeneity of the solute particles in a...
This paper reports a fabrication method for producing piezoelectric poly (vinylidene fluoride) films in their electroactive β-phase that features controlled thickness, smooth and flat surface, and high transparency. These piezoelectric films are suitable for being used as integrated microactuators, such as piezoelectric pumps and/or mixers, in microfluidic applications. Their actuation circuit design...
High dispersion of nanoparticles in transparent polymer matrices is the prerequisite to maintain the transparency of matrices. However, it is hard to fabricate the nancomposites with high visible light transmittance even at low nanoparticle concentrations. In this work, highly transparent Polyvinyl Butyral (PVB)/ZnO nanocomposites were fabricated by using the two-step process. Firstly, the monodispersed...
To mimic natural extracellular matrix architecture, the poly (L-lactic acid) (PLLA) scaffolds loading icariin and icariin-2-hydroxypropyl-beta-cyclodextrin inclusion complex were prepared via phase separation, solvent replacement and freeze-drying. The morphologies of PLLA scaffolds were visualized with scanning electron microscopy, the icariin concentration and drug release in vitro were determined...
The slow drying of the photoactive layer in polymer/ZnO nanorod hybrid solar cells is studied as a way to improve device performance. The power conversion efficiency can be further improved to 3.05% with an enhanced fill factor of 55% by slowing the spin coating rate of photoactive layer. With the slower spin coating rate, the films of photoactive layer are thicker, and the polymer chains have longer...
Iron encapsulated carbon nanoparticle - polyvinyl chloride composite films have been prepared by solvent mixing and drying method. The films were characterized by scanning electron microscope (SEM) and high resolution transmission electron microscope (HRTEM). A 5 nm thin graphitic carbon coating is observed on cubic Fe nanoparticles. The microwave absorption studies by wave guide technique in the...
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