The use of core-shell conductive microspheres as conductive fillers for anisotropic conductive films (ACFs) has broad application prospects for high-precision circuit connections. However, existing preparation methods suffer from environmental pollution and a relatively long processing procedure. Therefore, we propose a bio-inspired, simple, and environmentally friendly method for preparing PS/Ni core-shell conductive particles suitable for ACFs. Specifically, this study utilized the oxidative self-polymerization of dopamine (DA) to modify the surface of polystyrene (PS) microspheres. The catechol groups in polydopamine (PDA) act as both reducing agents and anchor groups for palladium (Pd) atoms to catalyze the electroless nickel plating. Results indicated that the amount of (PDA) on the PS surface and the morphology of the formed nickel-phosphor (Ni-P) layer were regulated by adjusting the DA polymerization time and concentrations. The prepared PS-PDA/Ni conducting particles with an average diameter of 2 +/- 0.2 mu m has a low density (1.5 g/cm3) and can be applied to ACFs. The application of the prepared ACFs was demonstrated by bonding two flexible print circuits (FPC) with a line spacing of 200 mu m. Good adhesion, conductivity, and anisotropic properties were observed in the bonded FPC200s. This study provides useful information for producing suitable conductive particles with easy synthesis for ACFs applications.

Tin (Sn) metallic material is one of the best-known metals and has been extensively studied due to its ease of processing, low melting point, and low cost. However, it is still challenging to synthesize high-processing performance and antioxidant Sn nanoparticles with tunable sizes. This research reported a facile, easy-to-scale-up polyol-mediated synthesis of Sn nanoparticles assisted by sodium citrates as a capping agent. The presence of citrate capping facilitated uniform nucleation of Sn nanoparticles and enhanced their antioxidant capacity and dispersion properties. These nanoparticles can remain stable against oxidation for more than 270 days in an ambient atmosphere, even under continuous heating at 200 degrees C for over 12 h. The citrate capping also inhibits interparticle agglomeration and allows the preparation of high-quality suspensions in water and many conventional organics. Moreover, efficient size tuning over a wide range (60 nm-1 mu m) can be achieved simply by changing the Sn2+ precursor concentrations. The above-mentioned antioxidant capacity and processability allow them to combine with silver flakes in thermosetting epoxy resin as complementary conductive fillers effectively, creating conductive pathways among the silver flakes to obtain high-performance electrically conductive adhesives (ECAs). By adding Sn nanoparticles as complementary conductive fillers, the resistivity of the ECAs can be reduced to 1/ 6000 of that of the ECAs filled with only the same mass ratio of silver flakes, exhibiting its great potential in future electronics.

In this research, the hemicellulose extracted from the waste liquid of viscose fiber was modified by maleic anhydride. The modified material, hemicellulose maleate (HCMA), consisted of a large number of carboxyl branched chains and was used to disperse carbon black water slurry. The synthesis and characterization of HCMA were determined by degree of substitution, FT-IR, 13 C-NMR, and TGA. The carbon black water slurry was prepared by ball-milling, and the dispersing performances were properly analyzed by LPSA, Zetasizer Nano, UV-Vis, SEM, and centrifuge method. The HCMA demonstrated effective activity in dispersing carbon black, such as uniform dispersion, small particle size, and long stability for centrifugation, temperature change, and storage. Adding 10 % HCMA, the carbon black water slurry achieve optimal stability, and the particle size reached 0.033 μm. When the dispersed carbon black water slurry was used for dyed viscose staple fiber, the black viscose staple fiber showed uniform color and strong color fastness. The properties of dry breaking strength, wet breaking strength, breaking elongation, variation index, and so on perfectly met the technological requirements. Hemicellulose maleate used for dispersing carbon black water slurry demonstrates good application prospects for dyed viscose staple fiber.

The paper presents a new, non-pollution pyrophosphate flame retardant microcapsules which was prepared by in situ polymerization with hemicellulose maleate (HCMA), urea, formaldehyde and pyrophosphate. The HCMA was obtained through the hemicellulose extracted from the waste liquid of regenerated cellulose fiber and modified by maleic anhydride. The pyrophosphate flame retardant microcapsules were degradable and environment friendly, and they could effectively provide compatibility with matrix and flame resistance. The preparation and properties of flame retardant microcapsules were determined. Under the preparation conditions of which the core–shell ratio was 2:1.5 (mol:mol), pH was 3.5 and temperature was 55 °C, the embedding quantity reached to 66.7%, and the average particle size of flame retardant microcapsules was about 20 μm. The flame retardant microcapsules exhibited good thermal stability. Thermal kinetics analysis was studied based on the Coats–Redfern equation, and the changes of activation energy during the thermal degradation were determined. The pyrophosphate flame retardant microcapsules were added into the regenerated cellulose fiber stock solution to prepare the film sample. By adding 15% flame retardant microcapsules, the LOI of film sample reached 29.1%, and the UL-94 on vertical combustion could reach UL-94-V-0. The film sample with pyrophosphate flame retardant microcapsules showed excellent flame retardant performance. The preparation on shell of flame retardant microcapsules

In the original publication of the article, the graphical abstract and Scheme 1(a) and Scheme 1(b) were published incorrectly.

A drug loading system based on biopeptide hyperbranched polyether (BHPE) had been prepared. The biopeptide hyperbranched polymer (BHP) was composed of trimellitic anhydride, lactic acid and glutamic acid chains. The BHPE was assembled by the BHP and polyethylene glycol 400 (PEG400). The effects of pH, mass ratio of BHP and PEG400 and reaction time on particle size and distribution were studied. When the pH was 7, the mass ratio of BHP and PEG400 was 1:4 and the reaction time was 1.5 h, the BHPE formed the appropriate hollow vesicle structure which the particle size was smaller and particle size distribution was better. Also the sample of BHPE exhibited the excellent performances on swelling and in vitro degradation. The salicylic acid (SA) was used as drug model and the properties of SA-loaded BHPE system were tested by LPSA, UV-Vis and TEM. The SA-loaded BHPE system possessed obvious core-skin structure, and it demonstrated good in vitro released performance.