A novel mechanical robust, self-healing and shape memory hydrogel based on PVA reinforced by cellulose nanocrystal

Song, Ke; Zhu, Weiming; Li, Xiaoyan; Yu, Zhicheng

doi:10.1016/j.matlet.2019.126884

Cited by 141 publications

(56 citation statements)

References 10 publications

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“…Fibers fabricate from native, regenerative or synthetic biopolymers have been widely used in medical and pharmaceutical fields such as wound dressing, 1 drug delivery, 2 tissue engineering. 3 These fibers show several advantages such as regeneration, environmentally friendly, degradability, and biocompatibility, 4 and are helpful for mitigating the current energy and environmental crisis as well. As one of the most important biopolymer, starches and its products have been widely used as slurry in textile industry, 5 packaging films in food industry, 6 tablet or drug-loaded microsphere in biomedical industry.…”

Section: Introductionmentioning

confidence: 99%

Jet evolution and fiber formation mechanism of amylopectin rich starches in centrifugal spinning system

Hou

et al. 2020

J of Applied Polymer Sci

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This article reports the jet evolution process and fiber formation mechanism of the amylopectin rich starch solution in centrifugal spinning system, and the linear polyvinylpyrrolidone (PVP) is applied to compare with starch solution. The results indicate that jet evolution processes of starch solution include steady state and Rayleigh–Taylor instability over the whole concentration range for the spinnability investigation, which are due to the hyperbranched molecular of amylopectin. As a compression, the linear molecular chain PVP solution expresses a steady state jet under the spinning concentration. The spinnability results show that the obtained starch fibers are always containing the beads due to the Rayleigh–Taylor instability of jet, but can be effectively controlled by solution concentration and amylose/amylopectin. Instead, the PVP fibers show a rapid decreasing of beads till to almost disappear with the increasing of solution concentration, which due to the improvement of chain entanglement increase the steady state portion of jet with the increasing of concentration. The thermal properties of obtained fiber show that fibers obtained from amylose with more thermal stability.

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Section: Introductionmentioning

confidence: 99%

Jet evolution and fiber formation mechanism of amylopectin rich starches in centrifugal spinning system

Hou

et al. 2020

J of Applied Polymer Sci

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“…Cellulose nanocrystal (CNC), a kind of nanomaterial derived from cellulose, possessed lots of desirable property, like extremely outstanding mechanical strength, biocompatible and biodegradable, high specific surface area and so on (Yu et al 2013;Li et al 2016). The distinctive property of cellulose nanocrystals make it useful building block in various applications, for instance as reinforcing agents (Ye et al 2015;Song et al 2017Song et al , 2020, biomedical implant (Rueda et al 2013), rheological modifier (Li et al 2015), nanocomposites (Yu et al 2014) as well as electronic components (Eyley et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of cellulose nanocrystal extracted from Calotropis procera biomass

Song

Zhu

et al. 2019

Bioresour. Bioprocess.

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101

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Calotropis procera fiber (CPF) is the fruit fiber of C. procera and belongs to a typical cellulosic fiber. In this study, Calotropis procera fiber (CPF) was first purified in the pretreatment process including delignification and bleaching before the isolation of cellulose nanocrystal. Chemical composition of Calotropis procera fiber was determined according to TAPPI standard method. It was composed of 64.0 wt% cellulose, 19.5 wt% hemicelluloses, and 9.7 wt% of lignin. The morphology of the Calotropis procera fiber and fiber after each pretreatment process was also investigated. Cellulose nanocrystal was extracted by classical sulfuric acid hydrolysis of the pretreated Calotropis procera fiber. TEM and SEM were used to analyze the morphologies of the obtained CNC. The crystallinity, thermal stability and suspension stability of the CNC were also investigated. The interesting results proved that this under-utilized biomass could be exploited as a new source of cellulose raw material for the production of cellulose nanocrystal. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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“…Nanocatalysts are very important for chemists due to being interesting character for the large contact surface. [25][26][27][28][29] Even though numerous efficient nanosized metal catalysts have been reported for A 3 -coupling reactions, [30] the application of nanoparticles as catalysts for decarboxylative A 3 -coupling reactions scarcely studied. In fact, only four examples of such reactions were reported in literature till now.…”

Section: Nanocatalystsmentioning

confidence: 99%

Decarboxylative A³‐coupling reactions: An overview

Vessally

2020

J Chinese Chemical Soc

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The propargylamine motif is not only prevalent in a wide variety of pharmaceuticals and other biologically active compounds but also utilized as a versatile building block in organic synthesis. Among the various methods for the synthesis of propargylamine derivatives, A3‐coupling represents one of the most general and attractive routes, since it offers the possibility for the construction of complex molecules from simple starting materials (amines, aldehydes, and alkynes) in one‐step with high atom economy. However, the use of volatile alkynes is the main disadvantage of this reaction. Recently, alkynyl carboxylic acids were successfully used as easily accessible and high stable surrogates for alkynes (via in situ decarboxylation) in A3‐coupling reactions. This Focus‐Review aims to give an overview of the decarboxylative A3‐coupling reactions by hoping that it will be beneficial to elicit further research in this appealing research arena. A special emphasis is placed on mechanistic aspect of reactions which may allow possible new insights into catalyst improvement.

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A novel mechanical robust, self-healing and shape memory hydrogel based on PVA reinforced by cellulose nanocrystal

Cited by 141 publications

References 10 publications

Jet evolution and fiber formation mechanism of amylopectin rich starches in centrifugal spinning system

Jet evolution and fiber formation mechanism of amylopectin rich starches in centrifugal spinning system

Preparation and characterization of cellulose nanocrystal extracted from Calotropis procera biomass

Decarboxylative A³‐coupling reactions: An overview

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A novel mechanical robust, self-healing and shape memory hydrogel based on PVA reinforced by cellulose nanocrystal

Cited by 141 publications

References 10 publications

Jet evolution and fiber formation mechanism of amylopectin rich starches in centrifugal spinning system

Jet evolution and fiber formation mechanism of amylopectin rich starches in centrifugal spinning system

Preparation and characterization of cellulose nanocrystal extracted from Calotropis procera biomass

Decarboxylative A3‐coupling reactions: An overview

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Product

Resources

About

Decarboxylative A³‐coupling reactions: An overview