含有西兰的粘合剂对新鲜和老化复合材料之间的修复键强度的影响-试点研究
Petra Gajski1, Matej Par2, Zrinka Tarle2
1Dental Clinic Apolonija, 10000 Zagreb, Croatia.
Materials (Basel, Switzerland)
|September 28, 2024
概括
表面处理和粘合剂影响树脂复合材料的修复强度. 一种含有烯的粘合剂 (SBU) 没有显示出它在修复新鲜或老化的复合材料方面比非烯粘合剂 (P&B) 具有优势.
科学领域:
- 牙科材料科学 牙科材料科学
- 聚合物化学 聚合物化学
- 生物材料工程 生物材料工程
背景情况:
- 牙复合材料修复通常需要由于磨损,骨折或二次腐蚀而进行修复.
- 在经过修复的复合材料中获得持久且可靠的粘合强度对于恢复寿命至关重要.
- 不同的表面处理和粘合剂系统对修复键强度的有效性需要进一步研究.
研究的目的:
- 评估各种表面处理 (不处理,喷砂,索夫-莱克斯盘) 与含有西兰 (ScotchBond Universal Plus - SBU) 或非西兰 (Prime&Bond Universal - P&B) 粘合剂相结合对树脂复合材料的修复键强度的影响.
- 为了比较新鲜 (24小时老化) 和老化 (4个月老化) 复合样本之间的修复键强度.
- 为了确定含有西兰的粘合剂在复合材料修复中是否比非西兰粘合剂提供更好的性能.
主要方法:
- 准备了140个复合样本,并在24小时或4个月内老化.
- 标本经过三种表面处理之一 (不处理,喷砂,Sof-lex盘) 并用SBU或P&B粘合剂粘合.
- 切割键强度在28天以37°C的温度储存水后进行了测试,并使用Kruskal-Wallis和Mann-Whitney U测试进行了统计分析.
主要成果:
- 在新鲜标本 (20.39 MPa) 的Sof-lex盘+P&B组中观察到的结合强度最高.
- 对于新鲜复合材料,喷砂+P&B和Sof-lex光盘+SBU组显示了统计学上相似的结果.
- 在老化复合材料组中,所有测试的粘合剂和表面处理都表现相似,而没有粘合剂的组具有最低的粘合强度.
结论:
- 与非锡兰粘合剂 (P&B) 相比,含有锡兰的粘合剂 (SBU) 对于新鲜或老化的树脂复合材料都没有表现出优越的修复键强度.
- 表面处理,特别是Sof-lex盘,结合非烯粘合剂,可以在新鲜复合材料中产生高修复粘合强度.
- 粘合剂系统的选择可能比表面准备对于老化复合材料的修复不那么关键,因为各组的性能相似.
更多相关视频
07:15A Testing Platform for Durability Studies of Polymers and Fiber-reinforced Polymer Composites under Concurrent Hygrothermo-mechanical Stimuli
Published on: December 11, 2014
13.8K
08:02Thin Film Composite Silicon Elastomers for Cell Culture and Skin Applications: Manufacturing and Characterization
Published on: July 3, 2018
10.6K
相关概念视频
Bonding and Strength of Aggregate
140
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
140
Alkali Aggregate Reaction in Concrete
90
The alkali-aggregate reaction in concrete involves natural siliceous minerals in aggregates reacting with alkaline hydroxides derived from cement alkalis. This reaction forms an alkali-silica gel that absorbs water, swells, and increases in volume, which is confined by the surrounding cement paste, creating internal pressures that crack and disrupt the concrete. The extent of expansion and damage can be partly attributed to the alkali-silica reaction's osmotic hydraulic pressure and the...
90
Curing of Concrete
89
The hydration of cement takes place within the water-filled capillary pores. However, environmental elements can disrupt this process by evaporating water from the concrete surfaces. Sealed concrete with a water-cement ratio below 0.5 experiences self-desiccation, leading to water loss. The water loss in concrete is mitigated by curing. This technique involves keeping the concrete saturated to maintain the necessary temperature and moisture conditions, to optimally fill the spaces in the cement...
89
Microcracking in Concrete
107
Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...
107
Accelerators
71
Accelerators in concrete serve as admixtures to speed up the hardening process, enabling the concrete to achieve early strength faster. Although accelerators do not necessarily impact the time it takes concrete to set, they reduce this time in practice. A common accelerator is calcium chloride, which is particularly useful for hastening early strength development in cold weather or for rapid repair jobs that require quick heat generation after mixing.
The effectiveness of calcium chloride can...
The effectiveness of calcium chloride can...
71
Relation Between Tensile Strength and Compressive Strength of Concrete
177
Concrete is a fundamental building material, and understanding its strengths is crucial for construction projects. The relationship between its tensile and compressive strengths is intricate, showing that while these strengths are related, they do not increase at the same rate. Tensile strength's growth is slower and is affected by various factors such as the methods used for testing, the size and shape of the specimen, the texture of the aggregate used, and the moisture content of the...
177
