The cover image by Yufeng Ma and Puyou Jia shows the recent progress of biomass-based self-healing polymers. The self-healing polymer materials derived from biomass resources can reduce the dependence on traditional non-renewable resources such as petroleum. The structures and properties of biomass-based self-healing polymer materials are of great significance for their processing, recycling, and self-healing. The research progress of bio-based self-healing polymer materials based on dynamic non-covalent bonds and dynamic covalent bonds including hydroxyl ester, Schiff base, disulfide bond, and hydroxyl urethane derived from vegetable oil, lignin, cellulose, vanillin, and natural rubber. DOI: 10.1002/app.51977

Angle-ply orientation-dependent micro-crack propagation model of CFRP.

Polyglycerol sebacate (PGS) is a biocompatible elastomer prepared via a two-step melt condensation reaction. The mechanical properties of the cured polymer have been extensively explored for tissue engineering applications; however, properties of pre-polymer (pre-PGS) remained limited. The study focuses on the rheological characterization of pre-PGS and its potential as an ultrasound contrast agent predicted via its oscillatory response in a simulated acoustic field.

CNTs were homogeneously dispersed in acrylonitrile–butadiene–styrene (ABS) matrix with the aid of regenerated cellulose (RC), via an easy and cost-effective Pickering emulsion approach to form conductive nanocomposites, which possessed an electrical conductivity of up to 21 Sm⁻¹ with 6.7 wt.% CNTs incorporation.

In this work, a waterborne polyamide (WPA) sizing agent was used to modify PI fibers to enhance the interface adhesion strength between the PI fibers and epoxy (EP) resin matrix. In addition, the hybrid sizing agent generated by WPA and waterborne EP (WEP) sizing agent exhibited the highest interface adhesion with 168.65% and 28.62% increment obtained for interfacial shear strength and interlaminar shear strength compared with unsized PI fiber reinforced EP resin composites.

Hyperbranched conjugated polymers containing different aryl group appended with carboxylic ester groups were synthesized by metal-free catalyzed polymerization. The synthesized polymers were highly sensitive and selective towards Fe³⁺ ions in organic solvents and aqueous solution. The obtained results also demonstrated that the different aryl moieties in the backbone mainly affect the energy band as well as a less affect towards their selective detection of Fe³⁺ ions.

The string-like copper coated carbon fiber reinforced rigid polyurethane.

The successful dual-drug release highlights the polyurea xerogel as a versatile carrier to combine anti-inflamatory and anticancer drugs into a single polymer matrix, opening new oportunities to develop functional materials containing different species for optical, health and environmental applications.

High fluorine-containing polyimides (HFPI) with high Tg, good thermal stability, high-optical transpancy, low-water absorption, and low-dielectric constant were prepared. The fluorine content of HFPI can reach as high as 32.6 wt%. The PI films showed low-D_k values of 2.68, 2.65, and 2.40 at 1 MHz, which were smaller than the commercial Kapton films (~3.2).

A novel poly(cyclotriphosphazene-co-4,4′-diaminodiphenyl sulfone) (CP-DDS) microsphere containing P/N/S elements was fabricated via the precipitation polymerization among hexachlorocyclotriphosphazene and 4,4′-diaminodiphenyl sulfone. This microsphere exhibited obvious effect in improving the flame retardancy and toughness of PLA. The fire-retardant materials prepared by this toughening microsphere are sufficient to cope with the challenges brought by complex environments, which are expected to be applied in more fields.

• A new simple method for the synthesis of paraformaldehyde was presented.
• Paraformaldehyde was applied to cross-linking of chitosan with sulfur-doped carbon dots through the methylene bridge.
• Reinforcing of photocatalytic properties was done by loading CeO₂ NPs.
• This system effectively degraded Diazinon under visible light.

Synthesis illustration of CDs, PCL@CDs and PCL@CDs@RFT microspheres.

The use of renewable energy sources requires the development of more efficient devices for its storage and timely release, such as vanadium flow batteries (VFB). In order to optimize the VFB properties, we proposed a composite based on a porous polyolefin matrix and a polymer with internal microporosity PIM-1 as an ion-conducting membrane. PIM-1 pores with diameter less than 2 nm provide size-screening of H₃O⁺/hydrate vanadium ions. The resulting structure demonstrates improved selectivity, which allows it to be used for real applications.

The polyacrylate with core-shell structure was prepared without any emulsifier. The molecular weight of the polyacrylate modified by waterborne polyester was up to 2.5×104 g·mol^-1 under the premise of 20% hydroxyl monomer content and 50% solid content. The film cured with melamine formaldehyde resin showed excellent water resistance, adhesion, hardness and tensile property.

The influence of interfacial aging on the S-N response of Arcan joints.

Photoactive GQDs-BC composite hydrogels are produced by immersing BC in GQDs acetone solution. Detailed structural, chemical and mechanical analyses show that photoactive GQDs are encapsulated into BC polymer matrix. Porosity test shows significant pore enlargement of GQDs-BC composite hydrogels. Composite hydrogels are highly potent oxygen radical generator and present advanced material for wound dressing application.

In this study, a P-N synergistic flame retardant AG601-DOPO (A-D) was synthesized by the reaction of an epoxy resin (AG601) with 9,10-dihydro-9-oxo-10-phosphophenanthrene-10-oxide (DOPO). A-D was then mixed with BA-a in different ratios, heated, melted, poured and cured to obtain samples. These samples were tested and characterized. The results showed that the modified BA-a had high flame retardant properties and high thermal stability, while maintaining high glass transition temperature and excellent mechanical properties.

A thermally reversible oil-impregnated gel coating is fabricated based on the physical cross-linking of the styrene-isoprene-styrene triblock copolymer in n-hexadecane, which exhibits outstanding anti-fouling and anti-corrosion performance as well as self-repairing capacity under laser radiation.

Temperature dependences of the tangent of the angle of mechanical losses for reactor blends on the base of UHMWPE with 30 wt. % CEH-n of different composition

To solve the issues of low ionic conductivity, poor interfacial stability, and weak mechanical strength in the current polymer electrolytes, herein, the UV curing method is proposed to in-situ polymerize the plastic crystal composite solid polymer electrolyte (S-PCCE). At the same time, the influence of UV irradiation time on the performance of electrolyte was discussed in detail.

Step 1: Oxyalkylated organosolv lignin. Step 2: Oxyalkylated organosolv lignin-g-PLA copolymers. Step 3: Copolymer-PLA blends.

Poly(m-phenylene isophthalamide) (PMIA) fabric with integrated conductive and superhydrophobic abilities via a simple method including γ-ray irradiation and dip-coating was fabricated. The surface roughness of PMIA was enhanced and the content of the oxygen element was increased after γ-ray irradiation, benefiting greatly the decorating of graphene oxide and silica nanoparticles. The conductivity and superhydrophobic ability were realized by the reduction of graphene oxide and microscale aggregation of silica nanoparticles.