Bulk heterojunction (BHJ) photovoltaics represent one of the most promising technologies in low-cost, high-throughput, environmentally friendly energy conversion. Morphological control is pillar recent remarkable progress power conversion efficiency. This review focuses on morphological by processing with solvent additives, which has been extensively adopted and exhibits compatibility large-scale processing. Recent investigations including material selection, variations at various length...

Aromatic carbonyl derivative sulfide polymers (see figure and inside cover) are described as a novel organic positive-electrode material for Li-ion batteries. The excellent capacity cycling stability performances, well many advantages including, amongst others, high safety, make them possible replacement conventional inorganic transition-metal-oxide-based materials. Supporting information this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2089/2007/c2584_s.pdf or...

Abstract To face the increasing demand of self‐healing hydrogels with biocompatibility and high performances, a new class cellulose‐based are constructed through dynamic covalent acylhydrazone linkages. The carboxyethyl cellulose‐ graft ‐dithiodipropionate dihydrazide dibenzaldehyde‐terminated poly(ethylene glycol) synthesized, then formed from their mixed solutions under 4‐amino‐DL‐phenylalanine (4a‐Phe) catalysis. chemical structure, as well microscopic morphologies, gelation times,...

Solution processable planar heterojunction perovskite solar cell is a very promising new technology for low cost renewable energy. One of the most common structures FTO/TiO2/CH3NH3PbI3-xClx/spiro-OMeTAD/Au. The main issues this type are poor coverage and morphology control CH3NH3PbI3-xClx film on TiO2. For first time, we demonstrate that problems can be easily resolved by using polymer additive in precursor solution during formation process. A 25% increase power conversion efficiency at...

Toxic dyes have threatened human health through the consumption of polluted water, so removal from wastewater has become a hot topic in both academic and industrial fields. Herein, we reported kind cellulose–clay hydrogel with superabsorbent properties, superior mechanical performance, high dye efficiency. The main strategy for preparation hydrogels was chemical cross-linking cellulose, carboxymethyl cellulose (CMC), intercalated clay NaOH/urea aqueous solution. as-prepared exhibited...

Ampholytic hydrogels with pH and salt responsive properties have been synthesized by cross-linking quaternized cellulose (QC) carboxymethyl (CMC) epichlorohydrin (ECH) in NaOH aqueous solution. The swelling behaviors of the QC/CMC were studied as a function polymer composition, pH, concentration. equilibrium ratio hydrogel ultrapure water strongly depended on increased dramatically from 8.6 to 498 g/g change weight QC CMC 3:1 1:3 (w/w). (Gel32) consisted 3:2 (w/w) had minimum ratio, it was...

While tremendous efforts have been dedicated to developing environmentally friendly films made from natural polymers and renewable resources, in particular, multifunctional featuring extraordinary mechanical properties, optical performance, ordered nanostructure, challenges still remain achieving all these characteristics a single material via scalable process. Here, we designed green route fabricating strong, super tough, regenerated cellulose tightly stacked long-range aligned nanofibers...

The development of a facile and fast method to construct anisotropic hydrogels with the ability induce unidirectional growth cells remains challenging. In this work, we demonstrated cellulose (ACHs) that are composed nanoscale aligned nanofibers by dissolving cotton liner pulp in alkali/urea aqueous solution. On basis directionally controlling architecture chains facial prestretching strategy chemical gel state locking highly ordered nanostructure through formation close physical networks...

Although hydrogels containing large amounts of water are similar to natural muscles, they a challenge be used in artificial muscles because their poor mechanical properties and low work capacities. The current paper describes the design fabrication tendril-inspired hydrogel via consecutive shaping process. Tunicate cellulose nanocrystals (TCNCs) incorporated into polymeric networks host–guest interactions reinforce hydrogel. Tendril-inspired obtained by treating TCNC-reinforced with...

Abstract Cellulose nanofibrils (CNFs) are supramolecular assemblies of cellulose chains that provide outstanding mechanical support and structural functions for cellulosic organisms. However, traditional chemical pretreatments defibrillation natural produce irreversible surface functionalization adverse effects morphology the CNFs, respectively, which limit utilization CNFs in nanoassembly functionalization. Herein, this work presents a facile energetically efficient engineering strategy to...

Cellulose was dissolved rapidly in 7 wt% NaOH/12 urea aqueous solution pre-cooled to −12 °C within 2 min obtain its solution, which is a “green” process. A series of regenerated cellulose (RC) films were prepared from the via simple and low-cost method evaluate their structure properties as packaging functional materials. The treated successfully with fluorescent dyes photoluminescent (PL) pigments fabricate, for first time, novel PL materials, exhibited strong fluorescence long after-glow...

Abstract A series of hydrogels were prepared from cellulose and PVA in NaOH/urea aqueous solution using both physical chemical crosslinking methods. The secure biodegradable materials. Their structure properties characterized by FTIR spectroscopy, DSC, XRD SEM. results indicated that all the cellulose/PVA exhibited homogeneous porous structures a certain miscibility. swelling degree water uptake markedly higher than those hydrogel. This work demonstrates two novel methods to prepare with...

Chitin is produced by a number of living organisms in lower plant and animal kingdoms, possesses natural biocompatibility. However, its dissolution very difficult the most common solvents. In present work, chitin was dissolved completely 8 wt% NaOH/4 urea aqueous solution via freezing/thawing method to prepare transparent solutions without derivatization, as supported 13C NMR. Subsequently, hydrogels were prepared directly from NaOH/urea system, for first time, maintaining attractive...

Abstract Novel cellulose hydrogels were synthesized through a “one‐step” method from cellulose, which was dissolved directly in NaOH/urea aqueous solution, by using epichlorohydrin as crosslinker. Structure and properties of the characterized SEM, NMR, water absorption testing. The are fully transparent display macroporous inner structure. equilibrium swelling ratios distilled at 25 °C range 30 to 60 g H 2 O/g dry hydrogel. Moreover, reswelling uptake could be achieved more than 70% compared...

It was puzzling that cellulose could be dissolved rapidly in 4.6 wt % LiOH/15 urea aqueous solution precooled to -12 degrees C, whereas it not the same solvent without prior cooling. To clarify this important phenomenon, structure and physical properties of LiOH water as well LiOH/urea at different temperatures were investigated by means laser light scattering, 13C NMR spectroscopy, differential scanning calorimetry, Fourier transform infrared wide-angle X-ray diffraction, transmission...

The fabrication of pure chitin materials remains a challenge due to the difficult dissolution and regeneration chitin. It has been stumbling block for research utilization. In this work, was dissolved completely in 11 wt% NaOH–4 urea aqueous solution via freezing/thawing method without derivatization, as supported by 13C NMR spectra. regenerated films with high strength were successfully prepared from transparent coagulating ethanol or 45 dimethylacetamide (DMAc) solution. influences...

Hydrogels having strong fluorescence were fabricated successfully, for the first time, from cellulose and quantum dots (QDs) in a NaOH/urea aqueous system via mild chemical cross-linking process. The CdSe/ZnS nanoparticles embedded firmly matrices, as result of interactions between after hydrolysis QDs ligands. results FTIR spectra, transmission electron microscopy, scanning microscopy photoluminescence (PL) spectra revealed that networks hydrogels played an important role protection...

Hydrogels are the focus of extensive research interests due to their potential application in fields biomedical materials, biosensors, agriculture, and cosmetics. Natural polysaccharide is one good candidates these hydrogels. However, weak mechanical properties cellulose hydrogels greatly limit practical application. Here, chemically dual-cross-linked (DCHs) were constructed by sequential reaction with low- high-molecular-weight cross-linkers obtain relatively short chains long cross-linked...