相关实验视频

Updated: Jul 18, 2025

Direct and Indirect Culture Methods for Studying Biodegradable Implant Materials In Vitro

Direct and Indirect Culture Methods for Studying Biodegradable Implant Materials In Vitro

Published on: April 15, 2022

酸复合水泥的机械性能和液体吸收

Ioana Lacan¹, Marioara Moldovan², Codruta Sarosi²

¹Department of Physics and Chemistry, Technical University of Cluj-Napoca, 400114 Cluj-Napoca, Romania.

Materials (Basel, Switzerland)

|August 26, 2023

概括

这项研究通过将三酸 (TCP) 与奇托和酸 (HA) 填充剂相结合,开发了新的复合酸水泥. 增强的复合材料水泥表现出更好的机械强度和减少液体吸收,为硬组织应用提供更好的性能.

科学领域:

生物材料科学生物材料科学
聚合物化学聚合物化学
材料工程材料工程材料工程

背景情况:

酸水泥 (CPC) 由于与天然的骨矿物质相似,因此具有很好的生物相容性.
然而,CPCs的机械性能不佳,限制了它们的临床应用.
开发新的复合CPC对于克服这些局限性和提高性能至关重要.

研究的目的:

设计和评估新型复合酸水泥,以改善机械性能和控制液体吸收.
为了研究将三酸 (TCP) 与酸盐和纳米酸 (HA) 作为聚合物矩阵中的填充剂的效果.
评估填料成分和分布对复合水泥的机械强度,溶性和液体吸收的影响.

主要方法:

使用基乙烯甲基酸盐 (HEMA) 和尿二甲基酸盐 (UDMA) 制备了一个聚合物矩阵,其中聚乙烯糖醇 (PEG 400) 和聚烯酸 (PCL) 的比例各不相同.
矿物填充剂包括三酸 (TCP),奇托和纳米酸 (HA) 在不同的组合中 (S0-未填充,S1-TCP,S2-奇托+TCP,S3-奇托+TCP+HA).
评估了机械性能 (压力,拉力,屈曲强度),液体溶解度,液体吸收和微观结构变化 (SEM).

主要成果:

复合水泥 (S2和S3) 与未填充矩阵 (S0) 和仅TCP填充剂 (S1) 相比,显著增强了压力,拉伸和曲强度.
S2和S3的液体吸收率较低,并且对液体透和表面侵蚀有更好的抵抗力,这表明稳定性有所改善.
虽然S2和S3更容易溶解,但由于添加剂的增强疏水性减少了整体液体吸收,最初吸收率更高,随着时间的推移而降低.

结论:

加入奇托和纳米酸作为三酸填充剂的添加剂显著改善复合酸水泥的机械性能.
开发的复合混凝土表现出减少液体吸收和增强对液体透的抗性,这表明耐用性得到改善.
该研究强调了填充剂成分,添加剂集成和嵌入模式在定制CPCs生物医学应用中的关键作用.

关键词:

酸是一种酸.基多酸盐的使用方法复合水泥是复合水泥的组成部分.机械性能机械性能机械性能

更多相关视频

An Improved Mechanical Testing Method to Assess Bone-implant Anchorage

An Improved Mechanical Testing Method to Assess Bone-implant Anchorage

Published on: February 10, 2014

Accessing the Cytotoxicity and Cell Response to Biomaterials

Accessing the Cytotoxicity and Cell Response to Biomaterials

Published on: July 8, 2021

相关概念视频

Porosity and Absorption of Aggregate

Porosity and Absorption of Aggregate

Aggregates contain pores of varying sizes; while some are completely enclosed within the particles, others open onto the surface, allowing water to penetrate. The porosity of aggregates is a major factor contributing to the overall porosity of concrete, given that aggregates constitute about three-quarters of concrete's volume.
When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the...

Mortar Properties

Mortar Properties

Mortar properties encompass a range of characteristics crucial for construction and masonry work, including workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Workability refers to mortar's ability to be easily applied and manipulated without sagging or falling off surfaces, which is important for efficient masonry unit placement and alignment. Water retention is essential to prevent the mortar from losing moisture too quickly to...

Porosity in Cement Paste

Porosity in Cement Paste

The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...

Hydration of Cement

Hydration of Cement

Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...

Strength of Cement

Strength of Cement

Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...

Soundness of Cement

Soundness of Cement

The soundness of cement refers to the ability of cement paste to retain its volume after setting. Unsound cement can lead to expansion and structural damage due to the presence of free lime, magnesia, and calcium sulfate. Free lime hydrates very slowly, expanding and causing unsoundness, which is difficult to detect because it intercrystallizes with other compounds. Magnesia also reacts with water, forming crystals that can disrupt the cement's structure. Calcium sulfate can create...