Iridescent Cellulose Nanocrystal Films Modified with Hydroxypropyl Cellulose.


:The introduction of polymers into a chiral nematic cellulose nanocrystal (CNC) matrix allows for the tuning of optical and mechanical properties, enabling the development of responsive photonic materials. In this study, we explored the incorporation of hydroxypropyl cellulose (HPC) into a CNC film prepared by slow evaporation. In the composite CNC/HPC thin films, the CNCs adopt a chiral nematic structure, which can selectively reflect certain wavelengths of light to yield a colored film. The color could be tuned across the visible spectrum by changing the concentration or molecular weight of the HPC. Importantly, the composite films were more flexible than pure CNC films with up to a ten-fold increase in elasticity and a decrease in stiffness and tensile strength of up to six times and four times, respectively. Surface modification of the films with methacrylate groups increased the hydrophobicity of the films, and therefore, the water stability of these materials was also improved.






Walters CM,Boott CE,Nguyen TD,Hamad WY,MacLachlan MJ




Has Abstract


2020-03-09 00:00:00












  • Effects of emulsion droplet size on the structure of electrospun ultrafine biocomposite fibers with cellulose nanocrystals.

    abstract::Electrospinning of cellulose nanocrystals (CNC)/poly(lactic acid) (PLA) emulsions has been demonstrated to be an effective dispersion and alignment method to control assembly of CNC into continuous composite ultrafine fibers. CNC-PLA nanocomposite random-fiber mats and aligned-fiber yarns were prepared by emulsion ele...


    pub_type: 杂志文章


    authors: Li Y,Ko FK,Hamad WY

    更新日期:2013-11-11 00:00:00

  • Terminally alkylated heparin. 2. Potent antiproliferative agent for vascular smooth muscle cells.

    abstract::The antiproliferative activity of alkylated heparin, in which the terminal end of heparin is derivatized with an alkyl group (butyl, octyl, lauryl, stearyl), was examined using vascular smooth muscle cells. The proliferation of cells, which were growth-arrested prior to addition of heparin, was inhibited in proportion...


    pub_type: 杂志文章


    authors: Gohda M,Magoshi T,Kato S,Noguchi T,Yasuda S,Nonogi H,Matsuda T

    更新日期:2001-01-01 00:00:00

  • Recent Advances in Biodegradable Conducting Polymers and Their Biomedical Applications.

    abstract::The growing importance of biodegradable conducting polymers (CPs) have fueled the rapid development of this unique class of polymeric materials in recent years. Possessing both the electrical conductivity approaching those of metallic conductors and the biodegradability of biocompatible polymers, biodegradable CPs are...


    pub_type: 杂志文章,评审


    authors: Kenry,Liu B

    更新日期:2018-06-11 00:00:00

  • Enzymatic copolymerization alters the structure of unpolymerized mixtures of the biomimetic monomers: the amphiphilic decyl ester of L-tyrosine and L-tyrosineamide--an AFM investigation of nano- to micrometer-scale structure differences.

    abstract::Previously, we have shown that the amphiphilic decyl esters of both D- and L-tyrosine (DELT) self-assemble in aqueous solution above their critical micelle concentration values to form long rodlike structures that can be enzymatically polymerized. In the current study, we have examined the self-assembled structures of...


    pub_type: 杂志文章


    authors: Marx KA,Lee JS,Sung C

    更新日期:2004-09-01 00:00:00

  • Endothelial Cell Migration on Poly(ε-caprolactone) Nanofibers Coated with a Nanohybrid Shish-Kebab Structure Mimicking Collagen Fibrils.

    abstract::Regulating cell migration dynamics is of significance in tissue engineering and regenerative medicine. A 3D scaffold was created to provide various topographies based on a poly(ε-caprolactone) (PCL) self-induced nanohybrid shish-kebab structure, which consisted of aligned PCL nanofibers and spaced PCL crystal lamellae...


    pub_type: 杂志文章


    authors: Guo X,Wang X,Li X,Jiang YC,Han S,Ma L,Guo H,Wang Z,Li Q

    更新日期:2020-03-09 00:00:00

  • Optimization of chitin extraction from shrimp shells.

    abstract::The aim of this paper is to define optimal conditions for the extraction of chitin from shrimp shells. The kinetics of both demineralization and deproteinization with, in the latter case, the role of temperature are studied. The characterization of the residual calcium and protein contents, the molecular weights, and ...


    pub_type: 杂志文章


    authors: Percot A,Viton C,Domard A

    更新日期:2003-01-01 00:00:00

  • Polymers and Composites Derived from Castor Oil as Sustainable Materials and Degradable Biomaterials: Current Status and Emerging Trends.

    abstract::Recent years have seen rapid growth in utilizing vegetable oils to derive a wide variety of polymers to replace petroleum-based polymers for minimizing environmental impact. Nonedible castor oil (CO) can be extracted from castor plants that grow easily, even in an arid land. CO is a promising source for developing sev...


    pub_type: 杂志文章


    authors: Chakraborty I,Chatterjee K

    更新日期:2020-12-14 00:00:00

  • EGFR-Targeted Polymeric Mixed Micelles Carrying Gemcitabine for Treating Pancreatic Cancer.

    abstract::The objective of this study was to design GE11 peptide (YHWYGYTPQNVI) linked micelles of poly(ethylene glycol)-block-poly(2-methyl-2-carboxyl-propylene carbonate-graft-gemcitabine-graft-dodecanol (PEG-b-PCC-g-GEM-g-DC) for enhanced stability and target specificity of gemcitabine (GEM) to EGFR-positive pancreatic cance...


    pub_type: 杂志文章


    authors: Mondal G,Kumar V,Shukla SK,Singh PK,Mahato RI

    更新日期:2016-01-11 00:00:00

  • Fluorescent cellulose microfibrils as substrate for the detection of cellulase activity.

    abstract::To devise a sensitive cellulase assay based on substrates having most of the physical characteristics of native cellulose, 5-(4,6-dichlorotriazinyl)aminofluorescein (DTAF) was used as a grafting agent to prepare suspensions of fluorescent microfibrils from bacterial cellulose. These suspensions were digested by a seri...


    pub_type: 杂志文章


    authors: Helbert W,Chanzy H,Husum TL,Schülein M,Ernst S

    更新日期:2003-05-01 00:00:00

  • Piriform spider silk sequences reveal unique repetitive elements.

    abstract::Orb-weaving spider silk fibers are assembled from very large, highly repetitive proteins. The repeated segments contain, in turn, short, simple, and repetitive amino acid motifs that account for the physical and mechanical properties of the assembled fiber. Of the six orb-weaver silk fibroins, the piriform silk that m...


    pub_type: 杂志文章


    authors: Perry DJ,Bittencourt D,Siltberg-Liberles J,Rech EL,Lewis RV

    更新日期:2010-11-08 00:00:00

  • Effect of alkyl length of peptide-polymer amphiphile on cargo encapsulation stability and pharmacokinetics of 3-helix micelles.

    abstract::3-Helix micelles have demonstrated excellent in vitro and in vivo stability. Previous studies showed that the unique design of the peptide-polymer conjugate based on protein tertiary structure as the headgroup is the main design factor to achieve high kinetic stability. In this contribution, using amphiphiles with dif...


    pub_type: 杂志文章


    authors: Dube N,Seo JW,Dong H,Shu JY,Lund R,Mahakian LM,Ferrara KW,Xu T

    更新日期:2014-08-11 00:00:00

  • Crystallite Size Effect on Thermal Conductive Properties of Nonwoven Nanocellulose Sheets.

    abstract::The thermal conductive properties, including the thermal diffusivity and resultant thermal conductivity, of nonwoven nanocellulose sheets were investigated by separately measuring the thermal diffusivity of the sheets in the in-plane and thickness directions with a periodic heating method. The cross-sectional area (or...


    pub_type: 杂志文章


    authors: Uetani K,Okada T,Oyama HT

    更新日期:2015-07-13 00:00:00

  • Polymersomes from dual responsive block copolymers: drug encapsulation by heating and acid-triggered release.

    abstract::A series of well-defined thermoresponsive diblock copolymers (PEO45-b-PtNEAn, n=22, 44, 63, 91, 172) were prepared by the atom transfer radical polymerization of trans-N-(2-ethoxy-1,3-dioxan-5-yl) acrylamide (tNEA) using a poly(ethylene oxide) (PEO45) macroinitiator. All copolymers are water-soluble at low temperature...


    pub_type: 杂志文章


    authors: Qiao ZY,Ji R,Huang XN,Du FS,Zhang R,Liang DH,Li ZC

    更新日期:2013-05-13 00:00:00

  • Polypeptide-based aerosol nanoparticles: self-assembly and control of conformation by solvent and thermal annealing.

    abstract::Nanoconfined self-assemblies within aerosol nanoparticles and control of the secondary structures are shown here upon ionically complexing poly(L-lysine) (PLL) with dodecylbenzenesulfonic acid (DBSA) surfactant and using solvents chloroform, 1-propanol, or dimethylformamide. Different solvent volatilities and drying t...


    pub_type: 杂志文章


    authors: Rahikkala A,Junnila S,Vartiainen V,Ruokolainen J,Ikkala O,Kauppinen E,Raula J

    更新日期:2014-07-14 00:00:00

  • Degradation of chitosans with a family 46 chitosanase from Streptomyces coelicolor A3(2).

    abstract::We have studied the degradation of well-characterized soluble heteropolymeric chitosans by a novel family 46 chitosanase, ScCsn46A from Streptomyces coelicolor A3(2), to obtain insight into the enzyme's mode of action and to determine its potential for production of different chitooligosaccharides. The degradation of ...


    pub_type: 杂志文章


    authors: Heggset EB,Dybvik AI,Hoell IA,Norberg AL,Sørlie M,Eijsink VG,Vårum KM

    更新日期:2010-09-13 00:00:00

  • Galactose-decorated cross-linked biodegradable poly(ethylene glycol)-b-poly(ε-caprolactone) block copolymer micelles for enhanced hepatoma-targeting delivery of paclitaxel.

    abstract::The inferior in vivo stability of micellar drugs has been a prime challenge for their application in targeted drug delivery. Here we report on novel galactose-decorated covalently cross-linked biodegradable micelles based on photo-cross-linkable poly(ethylene glycol)-b-poly(acryloyl carbonate)-b-poly(ε-caprolactone) (...


    pub_type: 杂志文章


    authors: Yang R,Meng F,Ma S,Huang F,Liu H,Zhong Z

    更新日期:2011-08-08 00:00:00

  • Selective localization of multiwalled carbon nanotubes in poly(epsilon-caprolactone)/polylactide blend.

    abstract::Poly(epsilon-caprolactone)/polylactide blend (PCL/PLA) is an interesting biomaterial because PCL and PLA present good complementarity in their physical properties and biodegradability. However, the thermodynamic incompatibility between two component polymers restricts further applications of their blend. In this work,...


    pub_type: 杂志文章


    authors: Wu D,Zhang Y,Zhang M,Yu W

    更新日期:2009-02-09 00:00:00

  • Shear-induced self-assembly of native silk proteins into fibrils studied by atomic force microscopy.

    abstract::Noncontact mode atomic force microscopy was used to investigate native silk proteins prepared in different ways. Low protein concentrations revealed that single protein molecules exhibit a simple, round shape with apparent diameters of 20-25 nm. Shearing the native protein solutions after extraction from the gland and...


    pub_type: 杂志文章


    authors: Greving I,Cai M,Vollrath F,Schniepp HC

    更新日期:2012-03-12 00:00:00

  • Synthesis and characterization of bionanocomposites with tunable properties from poly(lactic acid) and acetylated microfibrillated cellulose.

    abstract::In the present study, novel bionanocomposite materials with tunable properties were successfully prepared using a poly(lactic acid) (PLA) matrix and acetylated microfibrillated cellulose (MFC) as reinforcing agent. The acetylation of MFC was confirmed by FTIR and (13)C CP-MAS NMR spectroscopies. The grafting of acetyl...


    pub_type: 杂志文章


    authors: Tingaut P,Zimmermann T,Lopez-Suevos F

    更新日期:2010-02-08 00:00:00

  • Polylactide-graft-doxorubicin nanoparticles with precisely controlled drug loading for pH-triggered drug delivery.

    abstract::Nanoparticles (NPs) with high drug loading and pH-responsivity were prepared by nanoprecipitation of a hydrophobic polymer-drug conjugate (PDC). The PDC, polylactide-graft-doxorubicin (PLA-g-DOX), was synthesized by azide-alkyne click reaction to transform acetylene-functionalized PLA into PLA-graft-aldehyde (PLA-g-AL...


    pub_type: 杂志文章


    authors: Yu Y,Chen CK,Law WC,Weinheimer E,Sengupta S,Prasad PN,Cheng C

    更新日期:2014-02-10 00:00:00

  • Modular Polymer Antigens To Optimize Immunity.

    abstract::Subunit vaccines can have excellent safety profiles, but their ability to give rise to robust immune responses is often compromised. For glycan-based vaccines, insufficient understanding of B and T cell epitope combinations that yield optimal immune activation hinders optimization. To determine which antigen features ...


    pub_type: 杂志文章


    authors: Bennett NR,Jarvis CM,Alam MM,Zwick DB,Olson JM,Nguyen HV,Johnson JA,Cook ME,Kiessling LL

    更新日期:2019-12-09 00:00:00

  • Wormlike Nanovector with Enhanced Drug Loading Using Blends of Biodegradable Block Copolymers.

    abstract::The application of nanoparticles comprising amphiphilic block copolymers for the delivery of drugs is a subject of great interest as they hold promise for more effective and selective therapies. In order to achieve this ambition, it is of critical importance to develop our understanding of the self-assembly mechanisms...


    pub_type: 杂志文章


    authors: Ridolfo R,Arends JJ,van Hest JCM,Williams DS

    更新日期:2020-06-08 00:00:00

  • Alpha-D-glucan-based dendritic nanoparticles prepared by in vitro enzymatic chain extension of glycogen.

    abstract::The recombinant amylosucrase from Neisseria polysaccharea was used to glucosylate glycogen particles in vitro in the presence of sucrose as the glucosyl donor. The morphology and structure of the resulting insoluble products were shown to strongly depend on the initial sucrose/glycogen weight ratio. For the lower rati...


    pub_type: 杂志文章


    authors: Putaux JL,Potocki-Véronèse G,Remaud-Simeon M,Buleon A

    更新日期:2006-06-01 00:00:00

  • Structural effects on the biodistribution and positron emission tomography (PET) imaging of well-defined (64)Cu-labeled nanoparticles comprised of amphiphilic block graft copolymers.

    abstract::The synthesis of poly(methyl methacrylate-co-methacryloxysuccinimide-graft-poly(ethylene glycol)) (PMMA-co-PMASI-g-PEG) via living free radical polymerization provides a convenient route to well-defined amphiphilic graft copolymers having a controllable number of reactive functional groups, variable length PEG grafts,...


    pub_type: 杂志文章


    authors: Pressly ED,Rossin R,Hagooly A,Fukukawa K,Messmore BW,Welch MJ,Wooley KL,Lamm MS,Hule RA,Pochan DJ,Hawker CJ

    更新日期:2007-10-01 00:00:00

  • Fiber Alignment and Liquid Crystal Orientation of Cellulose Nanocrystals in the Electrospun Nanofibrous Mats.

    abstract::Sulfate cellulose nanocrystal (CNC) dispersions always present specific self-assembled cholesteric mesophases which is easily affected by the inherent properties of particle size, surface charge, and repulsion or affinity interaction, and external field force generated from ionic potential of added electrolytes, magne...


    pub_type: 杂志文章


    authors: Song W,Liu D,Prempeh N,Song R

    更新日期:2017-10-09 00:00:00

  • Spectral properties and DNA targeting features of a thiazole orange-peptide bioconjugate.

    abstract::The molecular recognition features of a DNA-sensitive fluorescent bioconjugate capable of targeting a specific DNA sequence with high efficiency are described. The bioconjugate combines a polypeptide from the Tc3 transposase DNA-binding domain with the dsDNA-sensitive fluorophore thiazole orange. Fluorescence spectros...


    pub_type: 杂志文章


    authors: Thompson M

    更新日期:2007-11-01 00:00:00

  • 3D-Printing of Structure-Controlled Antigen Nanoparticles for Vaccine Delivery.

    abstract::Targeted delivery of antigens to immune cells using micro/nanocarriers may serve as a therapeutic application for vaccination. However, synthetic carriers have potential drawbacks including cytotoxicity, low encapsulation efficiency of antigen, and lack of a morphological design, which limit the translation of the del...


    pub_type: 杂志文章


    authors: Nishiguchi A,Shima F,Singh S,Akashi M,Moeller M

    更新日期:2020-06-08 00:00:00

  • Combination of Amorphous Silk Fiber Spinning and Postspinning Crystallization for Tough Regenerated Silk Fibers.

    abstract::An artificial spinning system using regenerated silk fibroin solutions is adopted to produce high-performance silk fibers. In previous studies, alcohol-based agents, such as methanol or ethanol, were used to coagulate silk dope solutions, producing silk fiber with poor mechanical properties compared with those of nati...


    pub_type: 杂志文章


    authors: Yazawa K,Malay AD,Ifuku N,Ishii T,Masunaga H,Hikima T,Numata K

    更新日期:2018-06-11 00:00:00

  • Polyhydroxybutyrate Bioresins with High Thermal Stability by Cross-linking with Resorcinol Diglycidyl Ether.

    abstract::The development of sustainable materials by employing natural and nontoxic resources has been attracting much attention over the previous years. In this work, we discuss for the first time the chemical combination between resorcinol diglycidyl ether (RDGE), an aromatic biobased thermosetting monomer, and polyhydroxybu...


    pub_type: 杂志文章


    authors: Cantarutti C,Dinu R,Mija A

    更新日期:2020-08-10 00:00:00

  • Swelling behavior and morphological evolution of mixed gelatin/silk fibroin hydrogels.

    abstract::Mixed protein-based hydrogels have been prepared by blending gelatin (G) with amorphous Bombyx mori silk fibroin (SF) and promoting beta-crystallization of SF via subsequent exposure to methanol or methanol/water solutions. The introduction of beta crystals in SF serves to stabilize the hydrogel network and extend the...


    pub_type: 杂志文章


    authors: Gil ES,Frankowski DJ,Spontak RJ,Hudson SM

    更新日期:2005-11-01 00:00:00