Preparation and Characterization of Hydroxyapatite-Poly(Vinyl Alcohol) Composites Reinforced with Cellulose Nanocrystals

Wei, Wenbang; Song, Wei; Zhang, Shuangbao

doi:10.15376/biores.9.4.6087-6099

Cited by 12 publications

(13 citation statements)

References 30 publications

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“…In the present work it was noticed that KH550 treatment led to a small increase in crystallinity (Xc) from 40.71 % to 41.82 %. This trend is similar to KH550-modified corn fiber/PLA composites, where Xc increases from 37.75 % to 41.49 %, as measured by DSC (Luo et al 2014) The findings in this paper imply that the amorphous region on bamboo flour was partly destroyed during silane sizing, while new crystalline areas were harvested after rearrangement among macromolecular chains (Zhao 2012;Wei et al 2014). In addition, some impurities with lower crystallinity were also removed from fibers during modification (Lu et al 2014).…”

Section: Characterization Of Silane Modified Bamboo Plastic Interfacesupporting

confidence: 79%

“…For both the modified and control sample, major sharp peaks always occurred at a 2θ value of around 16°, 22°, and 35°, which was caused by diffraction planes (101), (002), (040), and in accordance with the typical cellulose I polymorph (Zhao 2012;Lu et al 2014;Wei et al 2014). Overall, no evident variation was observed in position and shape of peaks, partly indicating that the crystal structure never changed, as the combination between silane and bamboo would not occur on cellulose.…”

Section: Characterization Of Silane Modified Bamboo Plastic Interfacementioning

confidence: 95%

“…Some explorations have recently been conducted by the authors' team to deepen the understanding of biocomposites in the course of investigating various bamboo-based engineering materials (Zhao 2012;Cheng et al 2014;Wei et al 2014;Cheng et al 2015). Considering that, the objectives of this paper are to: 1) propose a technological route that applies to fabricating higher plant content biocomposites based on the combination of moso bamboo flour/silane KH550/HDPE; 2) reveal the compatibilization effects of KH550 on bamboo plastic interface in terms of crystalline structure, microscopic morphology, and thermal stability; 3) investigate the relationship between the manufacturing process and physical/ properties through orthogonal experiments; and 4) optimize the composite performance to demonstrate its potential in construction applications by virtue of artificial intelligence (AI).…”

Section: Introductionmentioning

confidence: 99%

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Interfacial Characterization and Optimal Preparation of Novel Bamboo Plastic Composite Engineering Materials

Song¹,

Zhao

et al. 2015

BioResources

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To blaze new trails for utilizing forestry processing residue, higher plant content biocomposites were proposed based on a combination of moso bamboo flour/silane KH550/high density polyethylene (HDPE), and the materials were characterized by diffractometry, spectroscopy, microscopy, and calorimetry. During surface modification, reactions between bamboo and silane occurred on the lignin aldehyde group. After 6 wt% KH550 treatment, crystallinity of bamboo was increased by 1.11 %, and melting temperature and enthalpy of the composite rose by 2.37 °C and 5.27 J/g, agreeing with improved interface morphology. Increasing in thickness from 3 to 9 mm, the physical and mechanical properties of composite were improved overall. Bamboo content caused the biggest influence, while thickness swelling exhibited the greatest susceptibility. Increasing the bamboo ratio boosted flexural and tensile properties, but it compromised toughness and water resistance, while silane and moulding parameters featured complicated relationships regarding performances. Combining an artificial neural network (ANN), KH550 3 wt%, moulding temperature of 180 °C, and a time of 8 min endowed 9 mm composites of 70 wt% bamboo with performance comparable to load bearing MDF in GB/T 11718.

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Section: Characterization Of Silane Modified Bamboo Plastic Interfacesupporting

confidence: 79%

Section: Characterization Of Silane Modified Bamboo Plastic Interfacementioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Interfacial Characterization and Optimal Preparation of Novel Bamboo Plastic Composite Engineering Materials

Song¹,

Zhao

et al. 2015

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“…This vibration corresponds to the crystalline domains of the PVA hydrogel. 24 Spectra of PVA hydrogels at CA concentrations of 0.15, 0.8 and 1.3 mM (Figure 3(b) to (d)) revealed similar vibrational peaks to that of neat PVA. Based on the spectrum analysis, the CA did not induce any covalent bonding or chemical reaction with the PVA.…”

Section: Gel Strengthmentioning

confidence: 73%

Influence of citric acid on the physical and biomineralization ability of freeze/thaw poly(vinyl alcohol) hydrogel

et al. 2018

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This work reports the modification of freeze/thaw poly(vinyl alcohol) hydrogel using citric acid as the bioactive molecule for hydroxyapatite formation in simulated body fluid. Inclusion of 1.3 mM citric acid into the poly(vinyl alcohol) hydrogel showed that the mechanical strength, crystalline phase, functional groups and swelling ability were still intact. Adding citric acid at higher concentrations (1.8 and 2.3 mM), however, resulted in physically poor hydrogels. Presence of 1.3 mM of citric acid showed the growth of porous hydroxyapatite crystals on the poly(vinyl alcohol) surface just after one day of immersion in simulated body fluid. Meanwhile, a fully covered apatite layer on the poly(vinyl alcohol) surface plus the evidence of apatite forming within the hydrogel were observed after soaking for seven days. Gel strength of the soaked poly(vinyl alcohol)/citric acid-1.3 mM hydrogel revealed that the load resistance was enhanced compared to that of the neat poly(vinyl alcohol) hydrogel. This facile method of inducing rapid growth of hydroxyapatite on the hydrogel surface as well as within the hydrogel network can be useful for guided bone regenerative materials.

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“…To deepen the insight into the emission reduction and the risk assessment for product formaldehyde emissions, various attempts have been recently made by the authors’ team [ 22 – 24 , 34 , 81 ], and this work would present a first effort to focus on the formaldehyde emission characteristics of wood building materials in Chinese standard tests, whose main contributions were as follows:…”

Section: Introductionmentioning

confidence: 99%

An Investigation on Formaldehyde Emission Characteristics of Wood Building Materials in Chinese Standard Tests: Product Emission Levels, Measurement Uncertainties, and Data Correlations between Various Tests

et al. 2015

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As a large producer and consumer of wood building materials, China suffers product formaldehyde emissions (PFE) but lacks systematic investigations and basic data on Chinese standard emission tests (CST), so this paper presented a first effort on this issue. The PFE of fiberboards, particleboards, blockboards, floorings, and parquets manufactured in Beijing region were characterized by the perforator extraction method (PE), 9–11 L and 40 L desiccator methods (D9, D40), and environmental chamber method (EC) of the Chinese national standard GB 18580; based on statistics of PFE data, measurement uncertainties in CST were evaluated by the Monte Carlo method; moreover, PFE data correlations between tests were established. Results showed: (1) Different tests may give slightly different evaluations on product quality. In PE and D9 tests, blockboards and parquets reached E1 grade for PFE, which can be directly used in indoor environment; but in D40 and EC tests, floorings and parquets achieved E1. (2) In multiple tests, PFE data characterized by PE, D9, and D40 complied with Gaussian distributions, while those characterized by EC followed log-normal distributions. Uncertainties in CST were overall low, with uncertainties for 20 material-method combinations all below 7.5%, and the average uncertainty for each method under 3.5%, thus being acceptable in engineering application. A more complicated material structure and a larger test scale caused higher uncertainties. (3) Conventional linear models applied to correlating PFE values between PE, D9, and EC, with R2 all over 0.840, while novel logarithmic (exponential) models can work better for correlations involving D40, with R2 all beyond 0.901. This research preliminarily demonstrated the effectiveness of CST, where results for D40 presented greater similarities to EC—the currently most reliable test for PFE, thus highlighting the potential of Chinese D40 as a more practical approach in production control and risk assessment.

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Preparation and Characterization of Hydroxyapatite-Poly(Vinyl Alcohol) Composites Reinforced with Cellulose Nanocrystals

Cited by 12 publications

References 30 publications

Interfacial Characterization and Optimal Preparation of Novel Bamboo Plastic Composite Engineering Materials

Interfacial Characterization and Optimal Preparation of Novel Bamboo Plastic Composite Engineering Materials

Influence of citric acid on the physical and biomineralization ability of freeze/thaw poly(vinyl alcohol) hydrogel

An Investigation on Formaldehyde Emission Characteristics of Wood Building Materials in Chinese Standard Tests: Product Emission Levels, Measurement Uncertainties, and Data Correlations between Various Tests

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