SMART MATERTECH
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  • SHAPE MEMORY MATERIALS/TECHNOLOGY
    • Shape memory alloys >
      • Shape memory alloy actuators
      • Grains and deformation
      • SMA suppliers
    • Shape memory polymers >
      • Thermo-responsive >
        • Heating-responsive >
          • Thermo-plastic elastic SMP >
            • Body/room temperature programmable
          • Thermoset elastic SMP >
            • Body/room temperature programmable
          • Tailoring Tg of polymers via alloying
          • Vitrimer
          • 3D printing filaments
          • Show time
          • Body-temperature programmable elastic shape memory materials: a brief history
        • Cooling-responsive >
          • Cooling-responsive shape memory materials: a brief history
      • Chemo-responsive >
        • Electrospinning: fundametals
        • Natural biopolymers
        • Water-responsive SME: a brief history
      • Hydrogel
      • Simulation of SMP
    • Shape memory hybrids >
      • Electro-activated shape memory hybrid
      • SMHs: tailorable properties
      • Shape memory hybrids: a brief history
    • Triple/multiple SME
    • Reversible/shape change effect
    • Programming conditions
    • Temperature memory effect in DSC
    • Buckling 失稳
    • Constrained recovery of 2way EVA
    • Shape memory structures
    • Shape memory composites
    • Intro. & Refs. >
      • SME in commercial polymers
      • SMM introduction videos
      • PMMA (acrylic)
  • DIY
    • Laser engraving and beyond
    • DIY (step-by-step) to protect power charge cable 自制充电线接头保护层
    • DIY SMP screw 自制形状记忆螺丝
    • DIY shape memory foam 自制形状记忆海绵
    • DIY shape memory shoes 自制形状记忆鞋
    • Modifying superelastic Nitinol 超弹镍钛记忆合金改性
    • Goggles
    • Temple Tip Retainers /眼镜防滑钩
    • Nose pads
    • 硅胶+TPU样品制作 搅拌流程
    • Unlock smart phones
  • PROJECTS
    • Biomedical applications 生物医疗应用 >
      • Self-tightening band aid 自收缩创可贴
      • Self-tightening staple 自收缩手术钉
      • Shape memory plug 形状记忆栓塞
      • Artificial blood vessels
      • Comfort fitting 舒适贴合 >
        • Shape memory shoes 形状记忆鞋
        • Wrist rings/rings
        • Mask口罩 >
          • DIY口罩扣松紧器
          • Mask holder 口罩支架
          • Improved fitting
          • Comfort fitting "invisible" mask 舒适贴合“隐形”口罩 >
            • Animation (mask)
        • Facial mask (面膜)
      • Retractable 可收回
      • Wrinkle removal 除皱
    • SMA devices 形状记忆合金器件 >
      • Buttons-on-demand 按需按钮
      • Sunlight activated heat engine 阳光驱动的热机
      • Adjustable high heel 可调高跟鞋
      • SMA inchworm 形状记忆合金驱动的竹节虫
      • Rolling car 滚动车
      • SMA springs
      • Gripper
    • SMP applications >
      • 4D latte art 4D 拉花 >
        • Spinning 4D latte art
      • Re-writable Braille paper 可复写盲文纸
      • Surface patterning
      • 2D to 3D switching
      • Ear impression/plugs
    • Metals/polymers >
      • Smart manufacturing
      • Powerless cooling
      • Self-healing
      • Sensors 传感器 >
        • Temperature sensors 温度标签
        • Anti-counterfeit labels 防伪标签
      • Vertical gardening 垂直绿化 >
        • 盆景 >
          • In Singapore
        • Products 产品 >
          • Event sponsorship
        • Projects 项目 >
          • A project in Guangzhou (2022)
          • 2nd Project in Guangzhou
          • 3rd Project in Singapore
        • Water on-demand irrigation system
        • Vertical greening panel (2nd type)
        • 2nd type of foam
      • Wearable electronics 可穿戴电子设备
      • Controlled folding/unfolding 可控展开/折叠 >
        • Folding (multiple layered)
        • Reshape & reprogram
      • Active disassembly 自拆卸
      • Morphing wing 变翼
      • Magnetic circuit design
    • Solid state UV cross-linking >
      • Solid-state heating cross-linking
    • Additive manufacturing增材制造 >
      • 3D/4D printing 打印
      • Rapid 3D printing in solid state 快速固态3D打印 >
        • Rapid volumetric additive manufacturing in solid-state: hydrogels
        • UV cross-linkable vitrimer 2022
        • UV cross-linking of solid material
        • UV cross-linking machine
        • Solid-state VAM (3D)
        • SVAM: A brief history
        • Review of Solid state VAM by AI
      • New ways of additive manufacturing (animation)
      • UV-FDM printer
      • Cooling-responsive shape memory hydrogel via FDM
      • 3D fashion >
        • Formation of 3D structures
    • Shape capture
    • Surface capture >
      • Surface pattern for structural coloring
  • Store room
    • References/tools >
      • 3D models >
        • More STL models
        • 生肖
        • 3D printing service
      • Sample dimensions for tensile test
      • Temperature calibration
      • Toolbox工具箱
      • Toolbox II (工具箱 II)
    • Jungle >
      • About polymers >
        • Thermally reversible solid-liquid transition
        • Cyclic loading
        • Mullins effect
        • Photoelsticity 光弹
        • Shear-thickening 剪切增强 >
          • 4 CNA
        • Closed to open cell foams
        • Laser induced graphene
        • Electrospinning
        • Nano imprinting
        • Gel 凝胶 >
          • Instability in wetting of hydrogel
          • Electroactive gel电活性凝胶
        • Cellulose 纤维素
        • Plastic bottle 塑料瓶
        • Polymer recycling
        • Rapid swelling 快速溶胀
        • Rapid hardening in water
        • Patterns
        • Brittle-ductile transition
        • Tan delta >
          • Re-programmable Tan delta
        • UV cross-linking
        • Hardening speed
      • Coloring 变色 >
        • Structural coloring atop curved surfaces
        • Thermochromic 热致变色
        • Photochromic 光致变色
        • Stress induced color change力致变色 >
          • Patterned coloring via stretching 拉出色彩
      • Moire interference 莫尔干涉
      • Lenticular lens
      • Transformation front
      • Contact angle vs surface pattern
      • Laser: applications
      • Insects 昆虫
      • Structural engineer >
        • Static and Dynamic Balancing
        • Introduction videos
        • Bistable structures: a case study >
          • 3D printing of bistable structures
          • Step-wise morphing
        • Yield criterion >
          • Normalized yield surface via GPU
          • Yield surface of SMAs and beyond
        • Buckling of embedded threads
        • Buckling of embedded strip
        • Buckling of strip atop soft substrate
        • Foam structures for packaging
      • Interesting >
        • Exhibition
        • Ideas
      • Experimental >
        • Tensile test
        • Differential Scanning Calorimetry (DSC) Procedure
        • Dynamic Mechanical Analysis (DMA) Procedure
        • Shape Memory Performance Characterization Procedure for Shape Memory Polymers
      • ChatGPT 4 fun
      • 智谱测试
  • Contact
    • SMM course
    • Representative publications
    • Projects of undergraduate students
    • List of videos
    • Special issues| Conferences
    • Companies
    • References

UV cross-linking

 Through a polarizer for anisotropic properties
(FYP) Angelyn Kwek QE

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Orientation dependent Tg

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Shape recovery at different speeds
After bent and then cooled in fridge, recovery at room temperature.
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(FYP) Tay, Calvin
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数据观察
  1. 总体趋势:
    • 两种偏振器(Normal 和 UV)下的储能模量在不同角度均保持在 1.5–2.2 MPa 之间。
    • 储能模量随偏振器角度变化不明显,各角度下的变化幅度较小。
  2. 比较:Normal 和 UV:
    • 0°:UV 偏振器的储能模量显著高于普通偏振器(大约 2.2 MPa 对比 2.0 MPa)。
    • 其余角度:两者的储能模量非常接近,差距不明显。
    • UV 偏振器的储能模量在大多数角度略高于普通偏振器,尤其在 75° 和 90°。
  3. 误差范围:
    • 0° 和 90° 的误差范围较大,可能表明在这些角度下测量结果波动较大。
    • 其余角度的误差范围较小,说明实验数据较为一致。

可能的物理解释
  1. 偏振角度影响:
    • 储能模量的微小变化可能与材料的各向异性特性有关,即材料的储能能力对偏振光的方向有一定敏感性。
    • 在 0° 和 90° 时,可能存在一些特殊的光学或材料响应,导致储能模量和误差的波动较大。
  2. UV 偏振器的作用:
    • UV 偏振器在高储能模量(如 0° 和 90°)下表现更优,可能是因为 UV 光的特性能够更有效地激发材料的交联反应,增强其储能能力。
    • 在其他角度下,UV 偏振光的作用与普通偏振光类似,因此差异较小。

建议
  1. 进一步研究:
    • 材料响应:研究材料在不同光源和偏振角度下的分子结构变化,以解释储能模量的微小差异。
    • 更多角度测量:增加角度测量间隔,例如 5° 或 10°,以更精确地观察角度对储能模量的影响。
  2. 实验改进:
    • 误差控制:对 0° 和 90° 的实验误差来源进行深入分析,例如光学仪器的稳定性或测量方法的改进。
    • 环境控制:确保实验环境(温度、湿度等)对 UV 和 Normal 测量的影响一致。
Picture

​一层薄液态树脂,用一束紫外光透过偏振片光交联,偏振片可以调节方向。用这样的方式进行光交联,可以有哪些应用?
ChatGPT 说:这个想法非常有意思 👍。你等于是用偏振光来赋予交联网络各向异性,这在材料设计里很有潜力。以下我分几个方向帮你整理可能的应用:

📌 1. 各向异性力学性能
  • 应用:柔性电子封装、微型弹性元件。
  • 原理:偏振光诱导交联会导致储能模量、玻璃化转变温度、damping 等方向差异。
  • 效果:制备“定向加固”的薄膜或微结构,比如在一个方向更硬,另一方向更柔。

📌 2. 各向异性导电/导热材料
  • 应用:
    • 导电聚合物薄膜(如 PANI、PEDOT) → 可做方向性导电电极、传感器。
    • 离子导电水凝胶 → 在生物传感器里实现单方向更高的离子迁移率。
  • 原理:分子链或导电路径在偏振光方向上更容易形成连续网络。
  • 效果:材料表现出σ∥ > σ⊥ 的电导率差异,甚至可以当作“分子层次的电路布线”。

📌 3. 光学元件
  • 应用:偏振片、波片、光子晶体、结构色材料。
  • 原理:偏振光诱导交联可能让折射率、双折射性质各向异性。
  • 效果:制备出具有方向性光学性能的薄膜,用于液晶显示器、偏振控制元件。

📌 4. 可控形变的智能材料
  • 应用:软体机器人、人工肌肉、光驱动致动器。
  • 原理:各向异性交联 → 热膨胀/收缩不均匀。
  • 效果:材料在加热或光照时,沿交联密度高的方向收缩更多 → 单层薄膜即可产生弯曲、扭曲。

📌 5. 信息存储 / 防伪
  • 应用:偏振可读的二维码、防伪图案。
  • 原理:交联方向决定光学/导电各向异性。
  • 效果:肉眼不可见,但用特定偏振光照射时,能显示出不同信号。

📌 6. 微纳加工与光刻
  • 应用:高分辨率微图案化。
  • 原理:偏振光方向性可控制反应速率,甚至影响光刻图案的边缘锐利度。
  • 效果:实现方向依赖的微结构阵列。

✅ 总结:
利用偏振片调控光交联方向,可以制备 力学、导电、光学、形变行为均有方向性差异的材料,应用前景包括 柔性电子、光学器件、智能驱动器、防伪标签、微纳加工。
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  • HOME
  • SHAPE MEMORY MATERIALS/TECHNOLOGY
    • Shape memory alloys >
      • Shape memory alloy actuators
      • Grains and deformation
      • SMA suppliers
    • Shape memory polymers >
      • Thermo-responsive >
        • Heating-responsive >
          • Thermo-plastic elastic SMP >
            • Body/room temperature programmable
          • Thermoset elastic SMP >
            • Body/room temperature programmable
          • Tailoring Tg of polymers via alloying
          • Vitrimer
          • 3D printing filaments
          • Show time
          • Body-temperature programmable elastic shape memory materials: a brief history
        • Cooling-responsive >
          • Cooling-responsive shape memory materials: a brief history
      • Chemo-responsive >
        • Electrospinning: fundametals
        • Natural biopolymers
        • Water-responsive SME: a brief history
      • Hydrogel
      • Simulation of SMP
    • Shape memory hybrids >
      • Electro-activated shape memory hybrid
      • SMHs: tailorable properties
      • Shape memory hybrids: a brief history
    • Triple/multiple SME
    • Reversible/shape change effect
    • Programming conditions
    • Temperature memory effect in DSC
    • Buckling 失稳
    • Constrained recovery of 2way EVA
    • Shape memory structures
    • Shape memory composites
    • Intro. & Refs. >
      • SME in commercial polymers
      • SMM introduction videos
      • PMMA (acrylic)
  • DIY
    • Laser engraving and beyond
    • DIY (step-by-step) to protect power charge cable 自制充电线接头保护层
    • DIY SMP screw 自制形状记忆螺丝
    • DIY shape memory foam 自制形状记忆海绵
    • DIY shape memory shoes 自制形状记忆鞋
    • Modifying superelastic Nitinol 超弹镍钛记忆合金改性
    • Goggles
    • Temple Tip Retainers /眼镜防滑钩
    • Nose pads
    • 硅胶+TPU样品制作 搅拌流程
    • Unlock smart phones
  • PROJECTS
    • Biomedical applications 生物医疗应用 >
      • Self-tightening band aid 自收缩创可贴
      • Self-tightening staple 自收缩手术钉
      • Shape memory plug 形状记忆栓塞
      • Artificial blood vessels
      • Comfort fitting 舒适贴合 >
        • Shape memory shoes 形状记忆鞋
        • Wrist rings/rings
        • Mask口罩 >
          • DIY口罩扣松紧器
          • Mask holder 口罩支架
          • Improved fitting
          • Comfort fitting "invisible" mask 舒适贴合“隐形”口罩 >
            • Animation (mask)
        • Facial mask (面膜)
      • Retractable 可收回
      • Wrinkle removal 除皱
    • SMA devices 形状记忆合金器件 >
      • Buttons-on-demand 按需按钮
      • Sunlight activated heat engine 阳光驱动的热机
      • Adjustable high heel 可调高跟鞋
      • SMA inchworm 形状记忆合金驱动的竹节虫
      • Rolling car 滚动车
      • SMA springs
      • Gripper
    • SMP applications >
      • 4D latte art 4D 拉花 >
        • Spinning 4D latte art
      • Re-writable Braille paper 可复写盲文纸
      • Surface patterning
      • 2D to 3D switching
      • Ear impression/plugs
    • Metals/polymers >
      • Smart manufacturing
      • Powerless cooling
      • Self-healing
      • Sensors 传感器 >
        • Temperature sensors 温度标签
        • Anti-counterfeit labels 防伪标签
      • Vertical gardening 垂直绿化 >
        • 盆景 >
          • In Singapore
        • Products 产品 >
          • Event sponsorship
        • Projects 项目 >
          • A project in Guangzhou (2022)
          • 2nd Project in Guangzhou
          • 3rd Project in Singapore
        • Water on-demand irrigation system
        • Vertical greening panel (2nd type)
        • 2nd type of foam
      • Wearable electronics 可穿戴电子设备
      • Controlled folding/unfolding 可控展开/折叠 >
        • Folding (multiple layered)
        • Reshape & reprogram
      • Active disassembly 自拆卸
      • Morphing wing 变翼
      • Magnetic circuit design
    • Solid state UV cross-linking >
      • Solid-state heating cross-linking
    • Additive manufacturing增材制造 >
      • 3D/4D printing 打印
      • Rapid 3D printing in solid state 快速固态3D打印 >
        • Rapid volumetric additive manufacturing in solid-state: hydrogels
        • UV cross-linkable vitrimer 2022
        • UV cross-linking of solid material
        • UV cross-linking machine
        • Solid-state VAM (3D)
        • SVAM: A brief history
        • Review of Solid state VAM by AI
      • New ways of additive manufacturing (animation)
      • UV-FDM printer
      • Cooling-responsive shape memory hydrogel via FDM
      • 3D fashion >
        • Formation of 3D structures
    • Shape capture
    • Surface capture >
      • Surface pattern for structural coloring
  • Store room
    • References/tools >
      • 3D models >
        • More STL models
        • 生肖
        • 3D printing service
      • Sample dimensions for tensile test
      • Temperature calibration
      • Toolbox工具箱
      • Toolbox II (工具箱 II)
    • Jungle >
      • About polymers >
        • Thermally reversible solid-liquid transition
        • Cyclic loading
        • Mullins effect
        • Photoelsticity 光弹
        • Shear-thickening 剪切增强 >
          • 4 CNA
        • Closed to open cell foams
        • Laser induced graphene
        • Electrospinning
        • Nano imprinting
        • Gel 凝胶 >
          • Instability in wetting of hydrogel
          • Electroactive gel电活性凝胶
        • Cellulose 纤维素
        • Plastic bottle 塑料瓶
        • Polymer recycling
        • Rapid swelling 快速溶胀
        • Rapid hardening in water
        • Patterns
        • Brittle-ductile transition
        • Tan delta >
          • Re-programmable Tan delta
        • UV cross-linking
        • Hardening speed
      • Coloring 变色 >
        • Structural coloring atop curved surfaces
        • Thermochromic 热致变色
        • Photochromic 光致变色
        • Stress induced color change力致变色 >
          • Patterned coloring via stretching 拉出色彩
      • Moire interference 莫尔干涉
      • Lenticular lens
      • Transformation front
      • Contact angle vs surface pattern
      • Laser: applications
      • Insects 昆虫
      • Structural engineer >
        • Static and Dynamic Balancing
        • Introduction videos
        • Bistable structures: a case study >
          • 3D printing of bistable structures
          • Step-wise morphing
        • Yield criterion >
          • Normalized yield surface via GPU
          • Yield surface of SMAs and beyond
        • Buckling of embedded threads
        • Buckling of embedded strip
        • Buckling of strip atop soft substrate
        • Foam structures for packaging
      • Interesting >
        • Exhibition
        • Ideas
      • Experimental >
        • Tensile test
        • Differential Scanning Calorimetry (DSC) Procedure
        • Dynamic Mechanical Analysis (DMA) Procedure
        • Shape Memory Performance Characterization Procedure for Shape Memory Polymers
      • ChatGPT 4 fun
      • 智谱测试
  • Contact
    • SMM course
    • Representative publications
    • Projects of undergraduate students
    • List of videos
    • Special issues| Conferences
    • Companies
    • References