Unprecedented Strength Polysiloxane-Based Polyurethane for 3D Printing and Shape Memory

Wang, Wencai; Sun, Siao; Hu, Shikai; Yang, Bin; He, Shaoyun; Wang, Runguo; Zhang, Liqun

doi:10.1021/acsami.1c22353

Cited by 33 publications

(25 citation statements)

References 56 publications

(78 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SS HO–PDMS–OH was first prepared according to a previously described method [ 50 ]. Next, the HMDI-based Si-TPU was synthesized as follows.…”

Section: Methodsmentioning

confidence: 99%

“…In this work, hydroxyl-terminated polydimethylsiloxane (PDMS; HO–PDMS–OH) was selected to synthesize polysiloxane-based polyurethanes because amino-terminated PDMS (H 2 N–PDMS–NH 2 ) reacts violently with isocyanate groups. However, HO–PDMS–OH is expensive, and the necessary technology is relatively immature when compared with the H 2 N–PDMS–NH 2 approach; therefore, HO–PDMS–OH was presynthesized by reacting H 2 N–PDMS–NH 2 and vinyl carbonate (EC), as described in our previous work [ 50 ]. Compared to conventional hydroxy silicone oil, the prepared OH–PDMS–OH possessed higher polarity and better compatibility with diisocyanates because of the l urethane groups.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Polysiloxane-Based Polyurethanes with High Strength and Recyclability

Wang

Bai

Sun

et al. 2022

IJMS

View full text Add to dashboard Cite

Polysiloxanes have attracted considerable attention in biomedical engineering, owing to their inherent properties, including good flexibility and biocompatibility. However, their low mechanical strength limits their application scope. In this study, we synthesized a polysiloxane-based polyurethane by chemical copolymerization. A series of thermoplastic polysiloxane-polyurethanes (Si-TPUs) was synthesized using hydroxyl-terminated polydimethylsiloxane containing two carbamate groups at the tail of the polymer chains 4,4′-dicyclohexylmethane diisocyanate (HMDI) and 1,4-butanediol as raw materials. The effects of the hard-segment content and soft-segment number average molecular weight on the properties of the resulting TPUs were investigated. The prepared HMDI-based Si-TPUs exhibited good microphase separation, excellent mechanical properties, and acceptable repeatable processability. The tensile strength of SiTPU-2K-39 reached 21.5 MPa, which is significantly higher than that of other flexible polysiloxane materials. Moreover, the tensile strength and breaking elongation of SiTPU-2K-39 were maintained at 80.9% and 94.6%, respectively, after three cycles of regeneration. The Si-TPUs prepared in this work may potentially be used in gas separation, medical materials, antifouling coatings, and other applications.

show abstract

“…The SS HO–PDMS–OH was first prepared according to a previously described method [ 50 ]. Next, the HMDI-based Si-TPU was synthesized as follows.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polysiloxane-Based Polyurethanes with High Strength and Recyclability

Wang

Bai

Sun

et al. 2022

IJMS

View full text Add to dashboard Cite

show abstract

“…By tuning the structures of CLPHUs, the values of elongation at break and tensile strength of CLPHUs can reach 452% and 65 MPa, respectively. As shown in Figure c, compared with many previous studies on PHU-based materials, our study shows a better combined performance in terms of mechanical properties. ,,,,,,,− …”

Section: Resultsmentioning

confidence: 47%

Mechanically Robust and Chemically Recyclable Polyhydroxyurethanes from CO₂-Derived Six-Membered Cyclic Carbonates

Miao

Jiao

Liu

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

In the current context of sustainable chemistry development and new regulations, aminolysis of cyclic carbonate is one of the most promising routes to nonisocyanate polyurethanes, also called polyhydroxyurethanes (PHU). In this study, a new kind of shape memory PHU vitrimers with outstanding mechanical properties and chemical recyclability is prepared. The monomer employed for aminolysis to form the PHUs is bis(six-membered cyclic carbonate) of 4,4′-biphenol (BCC-BP), which is synthesized by bi(1,3-diol) precursors and CO 2 . The synthetic strategy, isocyanate-free and employing CO 2 as a building block, is environmentally friendly and suits the concept of carbon neutrality. The thermal properties, mechanical properties, and dynamic behaviors of the PHUs are explored. The maximum breaking strength and elongation at break of the resultant PHUs reach 65 MPa and 452%, respectively, exceeding other reported PHU-based materials in combined performance. Such a PHU material can also lift up a load 4700 times heavier than its own weight by a shape recovery process. Finally, the bi(1,3-diol) can be regenerated through the alcoholysis of PHUs to realize chemical recycling. This work provides a feasibility study for a green synthetic approach and for designing a novel PHU material with outstanding properties.

show abstract

“…As one of the smart materials, shape-memory polymers (SMPs) can change into a transient shape and then subsequently recover their initial shape under external stimuli (such as pH and heat). SMPs have attracted considerable interest from researchers, − promoting the rapid development of smart devices and soft robotics. − For example, a smart braille display based on shape-memory polymer and magneto-resistive composite has recently been developed for visually impaired people. The device can potentially be used as a portable and refreshable Braille e-book .…”

Section: Introductionmentioning

confidence: 99%

High Mechanical Strength of Shape-Memory Hyperbranched Epoxy Resins

Lu¹,

Xu²,

Liang³

et al. 2022

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

Shape-memory epoxy resin (SMER) with strong mechanical properties have potential for a wide range of applications, but the design and synthesis of SMER with both high mechanical property and short shape recovery time are still a challenge. Hyperbranched epoxy resin shape-memory materials offer a unique approach that has been investigated by very few researchers because of the tedious synthetic process. In this work, serial hyperbranched epoxy resins with different molecular weights and structures (ETMP-n, ETHP-n, n = 6, 9, 11) were synthesized by a simple highly efficient thiol-maleimide click reaction. Cured ETHP-n films display shape fixity ratios and shape recovery ratios as high as 98.5% and 97.2% after seven shape-memory cycles, respectively. Cured ETMP-9 and ETHP-9 films demonstrate rapid response, with shape recovery times as short as 450 and 430 ms, respectively, which are significantly shorter than previously reported shape-memory epoxy resins. The maximum actuated stress of cured films reaches 0.72 MPa, which was much higher than that of most mammalian skeletal muscles (0.35 MPa). Cured ETHP-9 films exhibited higher shape-memory performances than cured ETMP-9 films because of nitrogen heterocyclic rigid structures, appropriately high crosslink density and narrower molecular weight distribution. These excellent shape-memory performances make the hyperbranched epoxy resins suitable for practical applications in microelectronic devices and artificial muscles.

show abstract

Unprecedented Strength Polysiloxane-Based Polyurethane for 3D Printing and Shape Memory

Cited by 33 publications

References 56 publications

Polysiloxane-Based Polyurethanes with High Strength and Recyclability

Polysiloxane-Based Polyurethanes with High Strength and Recyclability

Mechanically Robust and Chemically Recyclable Polyhydroxyurethanes from CO₂-Derived Six-Membered Cyclic Carbonates

High Mechanical Strength of Shape-Memory Hyperbranched Epoxy Resins

Contact Info

Product

Resources

About

Unprecedented Strength Polysiloxane-Based Polyurethane for 3D Printing and Shape Memory

Cited by 33 publications

References 56 publications

Polysiloxane-Based Polyurethanes with High Strength and Recyclability

Polysiloxane-Based Polyurethanes with High Strength and Recyclability

Mechanically Robust and Chemically Recyclable Polyhydroxyurethanes from CO2-Derived Six-Membered Cyclic Carbonates

High Mechanical Strength of Shape-Memory Hyperbranched Epoxy Resins

Contact Info

Product

Resources

About

Mechanically Robust and Chemically Recyclable Polyhydroxyurethanes from CO₂-Derived Six-Membered Cyclic Carbonates