Cover Image, Volume 43, Issue 7

Zheng, Luyao; Yu, Yangling; Tong, Zhaobin; Zou, Qianhui; Han, Shiyao; Jiang, Hao

doi:10.1111/jfpp.14110

Cited by 3 publications

(5 citation statements)

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“…In lower range of shear rates (<18 s −1 ), the viscosity of biomaterials inks is as follows: N100-S0 > N0-S100 > N75-S25 > N50-S50 > N25-S75. The viscosity of N0-S100 is within the range of measured viscosity of starch at room temperature, [22,23] and it is consistent with the viscosity reported for corn starch by Theagarajan et al [24] N100-S0 and N0-S100 had the highest viscosity for the most parts of the shear rate range; however, different mixtures of these biomaterial inks (N75-S25, N50-S50, and N25-S75) demonstrated lower viscosity. This lower viscosity is contrary to the excluded volume effect presented by Liu et al, [23] where adding the starch to k-carrageenan bioink decreased the ink viscosity as a result of a decrease in the accessible water to k-carrageenan molecules.…”

Section: Printability and Rheologysupporting

confidence: 89%

“…The SEM images of the printed filaments are shown in Figure 3a. The effect of 3D printing on the microfeatures of potato starch had been studied previously; [22] however, the purpose of this morphology study is to characterize macrofeatures. The filaments of the N100-S0 are uniformly distributed with more fine particles in the edges and more coarse particles in the middle of the filament.…”

Section: Morphologymentioning

confidence: 99%

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Development of N,O‐Carboxymethyl Chitosan‐Starch Biomaterial Inks for 3D Printed Wound Dressing Applications

Naseri

Cartmell

Saab

et al. 2021

Macromolecular Bioscience

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In this paper, a novel hybrid biomaterial ink consisting of two water-soluble polymers is investigated: starch and N,O-carboxymethyl chitosan (NOCC). The biomaterial ink is used to fabricate controlled release biodegradable wound dressing scaffolds via a novel low-temperature solvent (organic)-free 3D printing technique. NOCC is a variant of chitosan with a high degradation rate that can lead to an immediate release of the drugs, and starch, on the other hand, is used to alter degradation and drug release characteristics of the biomaterial. Mupirocin, a topical anti-infective, is incorporated into the biomaterial inks. Different biomaterial inks in terms of NOCC to starch ratio are prepared and characterized. Printability and rheology of the samples are investigated, and the release of mupirocin over time is quantified. The efficacy of the developed 3D printed wound dressings against Staphylococcus aureus is examined through disk diffusion assays. Increasing NOCC accelerated the release of the drug from the scaffold and led to larger zones of inhibition in the early hours of the in vitro tests; this phenomenon is correlated to the enhanced hydrophilicity of NOCC-dominated scaffolds. The drug release and the zone of inhibition are controlled by altering starch to NOCC ratio in the biomaterial ink.

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Section: Printability and Rheologysupporting

confidence: 89%

Section: Morphologymentioning

confidence: 99%

Development of N,O‐Carboxymethyl Chitosan‐Starch Biomaterial Inks for 3D Printed Wound Dressing Applications

Naseri

Cartmell

Saab

et al. 2021

Macromolecular Bioscience

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“…Investigations of the structure of (aqueous) starch gels after removing unbound/excess water are well known from research literature (rice starch, [ 73 ] high AM rice starch [ 74 ] ; Chinese water chestnut starch [ 49 ] ; rice starch [ 75 ] ; potato, wheat, and corn starch, [ 76 ] HACS [ 77 ] ). However, the observed structure does not represent the real state present in the aqueous original system, most likely due to the freezing step (phase separation) and subsequent freeze drying (removal of unbound/excess water).…”

Section: Resultsmentioning

confidence: 99%

High Amylose Corn Starch Gels—Investigation of the Supermolecular Structure

et al. 2022

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Aqueous gels based on two high amylose corn starch (HACS) genotypes with different amylose (AM) contents (HYLON V [HACS‐50] and HYLON VII [HACS‐70]) are prepared by gradation of the polymer concentration (6 and 9% w/w) and storage duration (1 and 14 days). The supermolecular structure of the wet gels is investigated by means of confocal laser scanning microscopy (CLSM), and the dried starch gel material examines crystallographically using X‐ray diffraction (XRD) and morphologically using scanning electron microscopy (SEM). In particular CLSM reveals that the gel structure shows changes with the storage time. XRD experiments reveal the existence of the B‐type crystalline structure as well as a remarkable portion of the V‐type, and higher crystallinity (Xc) is found after long‐term storage. Observation of the dried gel material's surface facilitates the assumption of a fractal‐based arrangement (structure of retrograded starch) within the starch gel network. The results are discussed closely with obtained data related to the molecular level of the gel matrix involved starch polymers, which are reported in previous publications.

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“…3D printing is a popular and customizable method of fabricating structures used in materials, chemistry and biology [169] . As a useful additive manufacturing technology, the desired products can be easily obtained by depositing materials layer by layer to form a three‐dimensional structure [170] . However, the printing of soft polymer materials is still in the early stage, and produced 3D printing materials usually have poor mechanical properties, low printing resolution, and poor functions [171] .…”

Section: Application Of Nanocomposite Hydrogelmentioning

confidence: 99%

“…[169] As a useful additive manufacturing technology, the desired products can be easily obtained by depositing materials layer by layer to form a three-dimensional structure. [170] However, the printing of soft polymer materials is still in the early stage, and produced 3D printing materials usually have poor mechanical properties, low printing resolution, and poor functions. [171] Therefore, researchers have conducted a lot of research on how to achieve 3D printing of polymers.…”

Section: D Printingmentioning

confidence: 99%

Recent Developments of Nanomaterials in Hydrogels: Characteristics, Influences, and Applications

et al. 2021

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In recent years, due to their good physical and chemical properties, nanocomposite hydrogels have shown great application potential in the fields of biomedicine, sensors, 3D printing, and water pollution control. Compared with pure polymer hydrogels, the superior performance of nanocomposite hydrogels is mainly due to the influence of nanomaterials on the internal structure and composition of the hydrogels. In this paper, starting from the basic properties required for practical applications of hydrogels, the influence of nanomaterials on the different properties of hydrogels is discussed. Meanwhile, this paper reviews the research status of nanocomposite hydrogels in different application fields, and emphasizes the challenges and development prospects of nanocomposite hydrogel applications.

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Cover Image, Volume 43, Issue 7

Abstract: The cover image is based on the Original Article The characteristics of starch gels molded by 3D printing by Luyao Zheng, et al., DOI .

Cited by 3 publications

References 0 publications

Development of N,O‐Carboxymethyl Chitosan‐Starch Biomaterial Inks for 3D Printed Wound Dressing Applications

Development of N,O‐Carboxymethyl Chitosan‐Starch Biomaterial Inks for 3D Printed Wound Dressing Applications

High Amylose Corn Starch Gels—Investigation of the Supermolecular Structure

Recent Developments of Nanomaterials in Hydrogels: Characteristics, Influences, and Applications

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