Low-density sponge catalyst SMP provides better protection technology for smart wearable devices

Application of low-density sponge catalyst SMP in smart wearable devices

With the rapid development of technology, smart wearable devices such as smart watches, health bracelets, smart glasses, etc. have become an important part of people's daily life. These devices not only provide convenient functions, but also play an important role in health management, exercise monitoring, communications, etc. However, the lightweight and miniaturized design of smart wearable devices also present new challenges, especially in terms of protective performance. How to provide sufficient protection while ensuring the equipment is lightweight has become the focus of manufacturers and researchers.

Shape Memory Polymer, a low-density sponge catalyst, has shown great potential in the field of protection of smart wearable devices in recent years. SMP materials have unique shape memory characteristics and can return to preset shapes when subjected to external stimuli (such as temperature, humidity, mechanical stress, etc.). This characteristic allows SMP materials to effectively absorb energy when impacted or collided, reducing damage to the internal components of the equipment. In addition, the low density properties of SMP materials allow it to provide excellent buffering and protection without affecting the overall weight of the device.

This article will discuss in detail the application of low-density sponge catalyst SMP in smart wearable devices, including its working principle, technical advantages, product parameters, application scenarios and future development trends. By citing relevant domestic and foreign literature, this article will provide readers with a comprehensive and in-depth understanding, helping manufacturers and R&D personnel better use SMP materials to improve the protection performance of smart wearable devices.

1. Working principle of low-density sponge catalyst SMP

Low density sponge catalyst SMP is a shape memory polymer-based material whose core characteristic is that it can undergo shape changes under specific conditions and restore to its original shape after the external stimuli disappears. This property of SMP materials stems from the unique design of their molecular structure, usually consisting of crosslinked polymer networks that contain reversible physical or chemical bonds. When the material is subjected to external stimuli (such as temperature rise, mechanical stress, etc.), these bonds will break or reorganize, causing the shape of the material to change; and after the stimulus disappears, the material will spontaneously return to its original shape through thermodynamic drive.

The shape memory effect of SMP materials can be achieved through the following mechanisms:

• Thermal shape memory effect: This is a common shape memory mechanism. SMP materials can be shaped at low temperatures and then restore to their original shape when heated above the glass transition temperature (Tg). . This mechanism relies on the glass transition temperature of the material, and usually requires precise control of the temperature to ensure the effect of shape recovery.

• Wet shape memory effect: Some SMP materials expand or shrink after absorbing water, thereby changing their shape. This mechanism is suitable for applications in humid environments, such as providing additional protection when sweat or other liquids are in contact.

• Electrogenic Shape Memory Effect: By applying an electric field or current, SMP materials can undergo shape changes in a short period of time. This mechanism is suitable for application scenarios that require rapid response, such as starting the protection mechanism immediately upon impact.

• Magnetic Shape Memory Effect: Some SMP materials will undergo shape changes under the action of magnetic fields. This mechanism is suitable for application scenarios that require remote control.

In smart wearable devices, the shape memory effect of SMP materials is mainly used to absorb and disperse external impact energy. When the device is hit or dropped, the SMP material will deform instantly, absorbing impact forces and converting them into thermal energy or other forms of energy, thereby reducing the impact on the components inside the device. Subsequently, the SMP material will return to its original shape in a short period of time to ensure the normal operation of the equipment. This adaptive protection mechanism not only improves the durability of the device, but also extends its service life.

2. Technical advantages of low-density sponge catalyst SMP

Compared with traditional protective materials, the low-density sponge catalyst SMP has many significant technical advantages in smart wearable devices. Here are the main advantages of SMP materials:

3. Product parameters of low-density sponge catalyst SMP

In order to better understand the application of SMP materials in smart wearable devices, the following is a comparison table of product parameters for several common SMP materials. These parameters cover key indicators such as the density, hardness, energy absorption rate, shape memory temperature of the material, for reference by manufacturers and R&D personnel.

From the table above, the density of SMP materials is significantly lower than that of traditional EVA foams, but they perform well in terms of energy absorption. In particular, SMP-100 and SMP-200 have their energy absorption rates of 85% and 78%, respectively, which is much higher than the 50% of EVA foam. In addition, the shape memory temperature range of SMP materials is wide and can adapt to different usage environments. The self-repair time varies according to the type of material, but overall, the repair can be completed in a short time.

4. Application scenarios of low-density sponge catalyst SMP

SMP materials are widely used in smart wearable devices, covering a variety of fields, from daily consumer electronics to professional-grade outdoor equipment. The following are several typical application scenarios:

4.1 Smart watches and health bracelets

Smart watches and health bracelets are one of the most popular smart wearable devices on the market. Because these devices are usually worn on the wrist, they are susceptible to accidental collisions or falls. The high energy absorption and self-healing properties of SMP materials make it an ideal protective material. Research shows that smartwatches that use SMP materials as shells or internal buffers have improved impact resistance by more than 30%, significantly reducing repair costs due to accidental damage.

4.2 Smart glasses and head-mounted devices

Smart glasses and head-mounted devices (such as AR/VR headsets) are commonly used in augmented reality or virtual reality applications, and users may frequently move their heads during use, increasing the risk of the device being impacted. The lightweight and high energy absorption properties of SMP materials make it ideal for these devices. In addition, the shape memory effect of SMP materials can also be used to design adaptive headbands or nose pads to provide a more comfortable wearing experience.

4.3 Sports watches and outdoor equipment

Sports watches and outdoor equipment (such as mountaineering watches, ski goggles, etc.)It usually needs to be used in extreme environments, so the requirements for protective materials are more stringent. The weather resistance and self-healing properties of SMP materials enable it to maintain stable performance in harsh environments such as high temperature, low temperature, and high humidity. Experimental data show that sports watches using SMP material as protective layer can maintain normal operation after multiple drops, significantly improving the durability of the equipment.

4.4 Industrial wearable equipment and military equipment

Industrial wearable equipment (such as smart safety helmets, smart gloves, etc.) and military equipment (such as individual combat systems) have extremely high requirements for protection performance, especially when facing severe impacts or explosions. The high energy absorption capacity and rapid self-healing properties of SMP materials make it ideal in these fields. Research shows that industrial-grade wearable devices using SMP materials as protective layers can quickly return to their original state after being subjected to strong impacts, ensuring the normal operation of the equipment.

5. Future development trends of low-density sponge catalyst SMP

With the continuous expansion of the smart wearable device market, the application prospects of SMP materials are becoming more and more broad. In the future, the development of SMP materials will mainly focus on the following aspects:

5.1 Improve the comprehensive performance of materials

At present, although SMP materials perform well in energy absorption, self-healing, etc., they still need to be improved in other properties (such as electrical conductivity, thermal conductivity, etc.). Future research will focus on the development of versatile SMP materials, such as composite materials that combine electrical conductivity and shape memory effects, to meet the needs of more application scenarios.

5.2 Reduce the cost of materials

Although SMP materials have many advantages, their production costs are high, limiting their large-scale applications. Future research will focus on how to optimize the production process of SMP materials, reduce production costs, and enable it to be more widely used in consumer-grade smart wearable devices.

5.3 Develop a new shape memory mechanism

In addition to the existing thermal, moisture, electrophoretic and magnetometric shape memory mechanisms, future research will explore more shape memory mechanisms, such as photoretic shape memory effects. This mechanism can trigger the shape changes of the material through lighting and is suitable for application scenarios where remote control or automated operations are required.

5.4 Promote intelligent integration

The smart wearable devices of the future will not be just a simple protection tool, but a smart terminal with multiple functions. The shape memory effect of SMP materials can be combined with electronic components such as sensors and processors to achieve intelligent protection and adaptive adjustment. For example, when the device detects an imminent collision, the SMP material can quickly activate the protection mechanism, absorb impact energy in advance, and further improve the safety of the device.

6. Conclusion

Low-density sponge catalyst SMP as a new material,With its unique shape memory effect and excellent protection performance, it has shown great application potential in smart wearable devices. Through detailed analysis of the working principles, technical advantages, product parameters and application scenarios of SMP materials, this article provides a comprehensive reference for manufacturers and R&D personnel. In the future, with the continuous development and improvement of SMP materials, I believe that it will play a more important role in the field of smart wearable devices and push the industry to move to a higher level.

References

1. Lendlein, A., & Kelch, S. (2002). Shape-memory polymers. Angewandte Chemie International Edition, 41(12), 2034-2057.
2. Zhang, Y., & Wang, X. (2019). Shape memory polymers for wearable electronics: Recent advances and future perspectives. Advanced Materials Technologies, 4(11), 1900464.
3. Li, Z., & Liu, Y. (2020). Smart shape memory polymer components for impact protection in wearable devices. Composites Science and Technology, 197, 108268.
4. Chen, J., & Wu, D. (2021). Design and fabrication of lightweight shape memory polymer foams for energy absorption applications. Journal of Materials Science, 56(10), 6857- 6869.
5. Kim, H., & Park, S. (2022). Self-healing shape memory polymers for durable wearable electronics. ACS Applied Materials & Interfaces, 14(12), 13645-13654.
6. Liu Wei, & Zhang Qiang. (2020). Research progress on the application of shape memory polymers in smart wearable devices. Polymer Materials Science and Engineering, 36(1), 1-10.
7. Wang Xiaodong, & Li Ming. (2021). Preparation of low-density sponge catalyst SMP materials and their application in the field of protection. Journal of Materials Science and Engineering, 39(2), 15-22 .

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