PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Enhanced plasticity of spontaneous coagulation cast oxide ceramic green bodies

2024-05-22
(Press-News.org)

Spontaneous coagulation casting (SCC), a new type of colloidal forming process, has garnered significant attention since 2011 due to various advantages of a high bulk density and non-toxicity, as well as the ability to achieve dispersion and coagulation with very low additions (< 1 wt%) of copolymers of isobutylene and maleic anhydride (PIBM). Further research has revealed that the green bodies formed by this method are brittle, and the smaller the powder particle size used the more brittle the green bodies are. This paper reports a study on the plasticity enhancement of oxide ceramic green bodies shaped by SCC.

 

The team published their article in the Journal of Advanced Ceramics on May 21, 2024.

 

“The objective of this study was to employ plasticizers in the PIBM gel system to enhance the plasticity of oxide ceramic green bodies with different particle sizes. The water-soluble plasticizers, glycerol and polyethylene glycol (PEG), were selected for containing polar groups (-OH) and nonpolar sections,” said the authors.

 

The research team quantified the plasticity of the green bodies with different plasticizers and different particle size powders by analyzing the flexural stress-strain curve and impact toughness, as well as carrying out drilling experiments in conjunction with practical processing. “The particle size of the ceramic powder played a critical role in determining the appropriate selection of plasticizers. For submicron powders, it was found that glycerol with low addition and shorter molecular chains had a more pronounced plasticizing effect. As the particle size decreased, PEG with a longer molecular chain enhanced plasticity. An increase in the amount was required for nanoscale powders. The particle sizes of 0.45 μm, 0.18 μm, and 50 nm showed an improvement in plasticity with the addition of 1 wt% glycerol, 1 wt% PEG, and 5 wt% PEG, respectively. The drilling test revealed that there was nearly no cracking around the holes in the green bodies with plasticizers.” The authors said. Additionally, the authors found that “…plasticizers had little effect on the sintering characteristics of the green bodies.”.

 

Regarding the plasticity mechanism, the authors explained: “… the introduction of glycerol and PEG molecules will interact with the PIBM molecules in ceramic slurries by hydrogen bonding and hydrophobic effect, influencing the interaction between PIBM molecules, thereby modifying the gel network structure. Upon drying, this network encapsulates the surface of ceramic particles to form a cocoon-like structure … to alleviate the hard contact between the particles…”.

 

The research team expects to prepare large-sized samples, thus further expanding the industrialized applications of spontaneous coagulation casting.

 

The contributors include Juanjuan WANG, Jin ZHAO, Junyan MAO, Wenlong LIU, Haohao JI, Jian ZHANG and Shiwei WANG from the State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.

 

This work was supported by the National Natural Science Foundation of China (No. 52130207).

 

About Journal of Advanced Ceramics

Journal of Advanced Ceramics (JAC) is an international journal that presents the state-of-the-art results of theoretical and experimental studies on the processing, structure, and properties of advanced ceramics and ceramic-based composites. JAC is Fully Open Access, monthly published by Tsinghua University Press on behalf of the State Key Laboratory of New Ceramics and Fine Processing (Tsinghua University) and the Advanced Ceramics Division of the Chinese Ceramic Society, and exclusively available via SciOpen. JAC has been indexed in SCIE (IF = 16.9, top 1/28, Q1), Scopus, and Ei Compendex.

About SciOpen 

SciOpen is a professional open access resource for discovery of scientific and technical content published by the Tsinghua University Press and its publishing partners, providing the scholarly publishing community with innovative technology and market-leading capabilities. SciOpen provides end-to-end services across manuscript submission, peer review, content hosting, analytics, and identity management and expert advice to ensure each journal’s development by offering a range of options across all functions as Journal Layout, Production Services, Editorial Services, Marketing and Promotions, Online Functionality, etc. By digitalizing the publishing process, SciOpen widens the reach, deepens the impact, and accelerates the exchange of ideas.

END



ELSE PRESS RELEASES FROM THIS DATE:

In vitro and circulation kinetic studies on π-π-stacked poly (ɛ-caprolactone)-based micelles loaded with olaparib

2024-05-22
Background and Aims Olaparib is a selective poly (ADP-ribose) polymerase inhibitor. However, its clinical application is hindered by low solubility and undesired pharmacokinetic profiles (e.g., relatively short circulation). Therefore, the present study aims to exploit polymeric micelles as a safe solubilizer and nanocarrier of olaparib, in order to improve its solubility and pharmacokinetics.   Methods Poly (ε-caprolactone)-co-poly (benzyl 5-methyl-2-oxo-1,3-dioxane-5-carboxylate), i.e., benzyl-functionalized trimethylene carbonate)-b-poly (ethylene glycol) (P(CL-co-TMC-Bz)-PEG), was synthesized by ring-opening polymerization, ...

The effect of measurement depth and technical considerations in performing liver attenuation imaging

2024-05-22
Background and Aims Clinical unmet need in managing nonalcoholic fatty liver disease (NAFLD), a common liver disorder affecting 25–30% of American adults is to develop noninvasive and robust biomarkers.   Methods We re-measured liver AC by placing a region of interest (ROI, 3 cm tall and 3 cm wide) at 4.5 cm, 6 cm, and 7.5 cm from the skin and a large ROI (6.0 cm tall and 7.3 cm wide) on pre-recorded ATI images from 117 participants screened for NAFLD. The difference in AC value at variable ROI depths was tested using one-way ANOVA (analysis of variance). Diagnostic ...

New study: Cuddled cows who work as therapy animals showed a strong preference for women compared to men

2024-05-22
A new study – published in the Human-Animal Interactions journal – reveals that cows who are cuddled as therapy animals showed a strong preference for interactions with women when compared to men. In turn, the research, which opens a new era on whether some therapies may be initially stronger based upon gender and not procedure, highlighted that the women also reported greater attachment behaviours towards the steers. Dr Katherine Compitus, Clinical Assistant Professor at New York University, and Dr Sonya Bierbower, Associate Professor at United States Military Academy West Point, conducted the research using the ...

Flexible film senses nearby movements — featured in blink-tracking glasses

Flexible film senses nearby movements — featured in blink-tracking glasses
2024-05-22
I’m not touching you! When another person’s finger hovers over your skin, you may get the sense that they’re touching you, feeling not necessarily contact, but their proximity. Similarly, researchers reporting in ACS Applied Materials & Interfaces have designed a soft, flexible film that senses the presence of nearby objects without physically touching them. The study features the new sensor technology to detect eyelash proximity in blink-tracking glasses. Noncontact sensors can identify or measure an object without directly touching it. Examples of these devices include ...

A simpler method for precise molecular orbital visualization

A simpler method for precise molecular orbital visualization
2024-05-22
Discoveries and progress in materials science often lay the foundation for technological breakthroughs that reshape many industrial and commercial fields, including medicine, consumer electronics, and energy generation, to name a few. Yet, the development of experimental techniques crucially underpins the exploration of new materials, paving the way for groundbreaking discoveries. These techniques allow scientists to delve into a material’s chemical and physical properties, unlocking insights essential for realizing their potential applications. In a recent study ...

New evidence suggests link between teen cannabis use and psychotic disorders may be stronger than previously thought

New evidence suggests link between teen cannabis use and psychotic disorders may be stronger than previously thought
2024-05-22
Toronto, ON, May 22, 2024 – A new study published in the journal Psychological Medicine estimates that teens using cannabis are at 11 times higher risk of developing a psychotic disorder compared to teens not using cannabis.   This finding suggests that the association between cannabis and psychotic disorders may be stronger than indicated by previous research, which has relied largely on older data when cannabis was less potent than today. For context, the average THC potency of cannabis in Canada has increased from roughly 1% in 1980 to 20% in 2018.  Researchers from the University of Toronto, the Centre for Addiction and Mental ...

Risk of under-treatment and over-treatment in a group of Australian men diagnosed with prostate cancer

2024-05-22
Background and objectives Patients with newly diagnosed prostate cancer (PCA) face the critical decision of whether to undergo treatment with curative intent (TCI, surgery or radiation) or conservative treatment on the background of a cancer where the potential for over-treatment and under-treatment is real. This study aimed to investigate the influence of cancer- and patient-related factors on the initial treatment decision for men with a new diagnosis of PCA and to evaluate treatment decisions against relevant guidelines.   Methods This study undertook a retrospective ...

Atypia of undetermined significance in thyroid fine needle aspiration cytology revisited

2024-05-22
Background and objectives Fine needle aspiration cytology (FNAC) is a cost-efficient technique for the management of thyroid nodules. Changes in the World Health Organization classification of thyroid tumors can influence reliability of cytology. The 2023 Bethesda System for Reporting Thyroid Cytopathology has adapted cytological nomenclature to these changes. The aim of this paper was to review the management of atypia of undetermined significance (AUS) in our institution. https://www.xiahepublishing.com/2771-165X/JCTP-2023-00062   Methods Retrospective review of thyroid FNAC diagnosed with AUS in a single hospital between 2014 and 2022. We analyzed the management ...

Smoke covered 70% of California during biggest wildfire years

Smoke covered 70% of California during biggest wildfire years
2024-05-22
As much as 70% of California was covered by wildfire smoke during parts of 2020 and 2021, according to a study from the University of California, Davis. The study, published today in the journal Communications: Earth & Environment, combined lake-based sensors with satellite imagery to find that maximum smoke cover has increased by about 116,000 square miles since 2006. The study measured lake responses to wildfire smoke in 2018, 2020 and 2021 — the three largest fire seasons on record in California. It found the lakes were exposed ...

Extreme temperatures may increase risk of stroke mortality, especially in low-income countries

2024-05-22
Embargoed for release: Wednesday, May 22, 2024, 5:00 AM ET Key points: In a large, multinational investigation of the link between extreme temperatures and stroke mortality, researchers found that of every 1,000 ischemic or hemorrhagic stroke deaths, about 11 were attributable to extreme cold and hot days. The study also found that low-income countries bore a higher burden of heat-related hemorrhagic stroke mortality than high-income countries. The researchers foresee an increase in fatal strokes, as well as a widening disparity ...

LAST 30 PRESS RELEASES:

Microwave-induced pyrolysis: A promising solution for recycling electric cables

Cooling with light: Exploring optical cooling in semiconductor quantum dots

Breakthrough in clean energy: Scientists pioneer novel heat-to-electricity conversion

Study finds opposing effects of short-term and continuous noise on western bluebird parental care

Quantifying disease impact and overcoming practical treatment barriers for primary progressive aphasia

Sports betting and financial market data show how people misinterpret new information in predictable ways

Long COVID brain fog linked to lung function

Concussions slow brain activity of high school football players

Study details how cancer cells fend off starvation and death from chemotherapy

Transformation of UN SDGs only way forward for sustainable development 

New study reveals genetic drivers of early onset type 2 diabetes in South Asians 

Delay and pay: Tipping point costs quadruple after waiting

Magnetic tornado is stirring up the haze at Jupiter's poles

Cancers grow uniformly throughout their mass

Researchers show complex relationship between Arctic warming and Arctic dust

Brain test shows that crabs process pain

Social fish with low status are so stressed out it impacts their brains

Predicting the weather: New meteorology estimation method aids building efficiency

Inside the ‘swat team’ – how insects react to virtual reality gaming 

Oil spill still contaminating sensitive Mauritius mangroves three years on

Unmasking the voices of experience in healthcare studies

Pandemic raised food, housing insecurity in Oregon despite surge in spending

OU College of Medicine professor earns prestigious pancreatology award

Sub-Saharan Africa leads global HIV decline: Progress made but UNAIDS 2030 goals hang in balance, new IHME study finds

Popular diabetes and obesity drugs also protect kidneys, study shows

Stevens INI receives funding to expand research on the neural underpinnings of bipolar disorder

Protecting nature can safeguard cities from floods

NCSA receives honors in 2024 HPCwire Readers’ and Editors’ Choice Awards

Warning: Don’t miss Thanksgiving dinner, it’s more meaningful than you think

Expanding HPV vaccination to all adults aged 27-45 years unlikely to be cost-effective or efficient for HPV-related cancer prevention

[Press-News.org] Enhanced plasticity of spontaneous coagulation cast oxide ceramic green bodies