scholarly journals High strength and low swelling composite hydrogels from gelatin and delignified wood

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Shennan Wang ◽  
Kai Li ◽  
Qi Zhou
Keyword(s):  
Mechanical Strength ◽  
High Strength ◽  
Honeycomb Structure ◽  
Composite Hydrogel ◽  
High Porosity ◽  
High Mechanical Strength ◽  
Composite Hydrogels ◽  
Freeze Dried ◽  
Strength And Stiffness ◽  
Phosphate Buffered Saline

Abstract A delignified wood template with hydrophilic characteristics and high porosity was obtained by removal of lignin. Gelatin was infiltrated into the delignified wood and further crosslinked with a natural crosslinker genipin to form hydrogels. The composite hydrogels showed high mechanical strength under compression and low swelling in physiological condition. The effect of genipin concentrations (1, 50 and 100 mM) on structure and properties of the composite hydrogels were studied. A porous honeycomb structure with tunable pore size and porosity was observed in the freeze-dried composite hydrogels. High elastic modulus of 11.82 ± 1.51 MPa and high compressive yield stress of 689.3 ± 34.9 kPa were achieved for the composite hydrogel with a water content as high as 81%. The equilibrium water uptake of the freeze-dried hydrogel in phosphate buffered saline at 37 °C was as low as 407.5%. These enables the delignified wood structure an excellent template in composite hydrogel preparation by using infiltration and in-situ synthesis, particularly when high mechanical strength and stiffness are desired.

scholarly journals A Composite Hydrogel with High Mechanical Strength, Fluorescence, and Degradable Behavior for Bone Tissue Engineering

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1112 ◽  
Author(s):  
Yanqin Wang ◽  
Yanan Xue ◽  
Jinghui Wang ◽  
Yaping Zhu ◽  
Yu Zhu ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Mechanical Strength ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
High Strength ◽  
Bone Substitutes ◽  
Composite Hydrogel ◽  
Poly Vinyl Alcohol ◽  
High Mechanical Strength

In this work, to obtain a novel composite hydrogel with high mechanical strength, fluorescence and degradable behavior for bone tissue engineering, we prepare a nanofiller and double-network (DN) structure co-enhanced carbon dots/hydroxyapatite/poly (vinyl alcohol) (CDs/HA/PVA) DN hydrogel. The composite hydrogels are fabricated by a combination of two fabrication techniques including chemical copolymerization and freezing‒thawing cycles, and further characterized by FTIR, XRD, etc. Additional investigations focus on the mechanical properties of the hydrogel with varying mass ratios of CDs to PVA, HA to PVA and different numbers of freezing/thawing cycles. The results show that the as-prepared CDs3.0/HA0.6/PVA DN9 hydrogel has optimized compression properties (Compression strength = 3.462 MPa, Young’s modulus = 4.5 kPa). This is mainly caused by the synergism effect of the nanofiller and chemical and physical co-crosslinking. The water content and swelling ratio of the CDs/HA/PVA SN and DN gels are also systematically investigated to reveal the relationship of their microstructural features and mechanical behavior. In addition, in vitro degradation tests of the CDs/HA/PVA DN hydrogel show that the DN hydrogels have a prominent degradable behavior. So, they have potential to be used as high-strength, self-tracing bone substitutes in the biomedical engineering field.

scholarly journals High-strength and fibrous capsule–resistant zwitterionic elastomers

2021 ◽  
Vol 7 (1) ◽  
pp. eabc5442
Author(s):  
Dianyu Dong ◽  
Caroline Tsao ◽  
Hsiang-Chieh Hung ◽  
Fanglian Yao ◽  
Chenjue Tang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Strength ◽  
High Strength ◽  
Design Principles ◽  
Fibrous Capsule ◽  
High Mechanical Strength ◽  
Capsule Formation ◽  
Locking Mechanism ◽  
Fibrous Capsule Formation

The high mechanical strength and long-term resistance to the fibrous capsule formation are two major challenges for implantable materials. Unfortunately, these two distinct properties do not come together and instead compromise each other. Here, we report a unique class of materials by integrating two weak zwitterionic hydrogels into an elastomer-like high-strength pure zwitterionic hydrogel via a “swelling” and “locking” mechanism. These zwitterionic-elastomeric-networked (ZEN) hydrogels are further shown to efficaciously resist the fibrous capsule formation upon implantation in mice for up to 1 year. Such materials with both high mechanical properties and long-term fibrous capsule resistance have never been achieved before. This work not only demonstrates a class of durable and fibrous capsule–resistant materials but also provides design principles for zwitterionic elastomeric hydrogels.

General Strategy to Fabricate Highly Filled Microcomposite Hydrogels with High Mechanical Strength and Stiffness

2018 ◽  
Vol 10 (4) ◽  
pp. 4161-4167 ◽  
Author(s):  
Zhandong Gu ◽  
Lie Chen ◽  
Yichao Xu ◽  
Yusi Liu ◽  
Ziguang Zhao ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
General Strategy ◽  
High Mechanical Strength ◽  
Strength And Stiffness

A room-temperature self-healing elastomer with ultra-high strength and toughness fabricated via optimized hierarchical hydrogen-bonding interactions

2022 ◽  
Author(s):  
Liangliang Xia ◽  
Ming Zhou ◽  
Hongjun Tu ◽  
wen Zeng ◽  
xiaoling Yang ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Mechanical Strength ◽  
Room Temperature ◽  
Polymeric Materials ◽  
High Strength ◽  
Self Healing ◽  
High Mechanical Strength ◽  
Hydrogen Bonding Interactions ◽  
Healing Efficiency ◽  
Good Healing

The preparation of room-temperature self-healing polymeric materials with good healing efficiency and high mechanical strength is challenging. Two processes are essential to realise the room-temperature self-healing of materials: (a) a...

scholarly journals Expanded graphene oxide fibers with high strength and increased elongation

RSC Advances ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 4198-4202 ◽  
Author(s):  
Ashok D. Ugale ◽  
LinLin Chi ◽  
Min-Kyu Kim ◽  
Sudong Chae ◽  
Jae-Young Choi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Mechanical Strength ◽  
Basal Plane ◽  
High Strength ◽  
Interplanar Distance ◽  
High Mechanical Strength ◽  
Plane Interaction

The increased interplanar distance between the EGO sheets favored the edge-to-edge than basal plane interaction within the fiber, resulting in high mechanical strength (492 MPa) and increased elongation (6.1%).

AW DYNALLOY 50

Alloy Digest ◽  
1966 ◽  
Vol 15 (11) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Mechanical Strength ◽  
High Strength ◽  
Heat Treating ◽  
Bend Strength ◽  
Low Alloy Steel ◽  
Steel Company ◽  
High Mechanical Strength ◽  
Weight Saving ◽  
Structural Applications

Abstract AW DYNALLOY 50 is a high strength low alloy steel which offers high mechanical strength together with good forming properties and weldability. It is recommended where improved strength or weight saving is desired in structural applications. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and bend strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-203. Producer or source: Alan Wood Steel Company.

The Development of High Strength and High Bs NiZn Ferrite Material

2013 ◽  
Vol 320 ◽  
pp. 3-6
Author(s):  
Min Nie ◽  
Jiang Ping Sun ◽  
Fang Zhou Xu
Keyword(s):  
Mechanical Strength ◽  
Flux Density ◽  
High Strength ◽  
Oxide Ceramic ◽  
Test Results ◽  
High Mechanical Strength ◽  
Ceramic Method ◽  
Ferrite Material ◽  
Low Profile ◽  
Power Inductors

NiZn ferrite material TN40S-X was fabricated by conventional oxide ceramic method. The test results show that the material possesses high mechanical strength and high saturation flux density (Bs),and it is suitable for low profile power inductors with dual requirements of mechanical strength and saturation flux density.

scholarly journals Rapid uniaxial actuation of layered bacterial cellulose/poly(N-isopropylacrylamide) composite hydrogel with high mechanical strength

RSC Advances ◽  
2018 ◽  
Vol 8 (23) ◽  
pp. 12608-12613 ◽  
Author(s):  
Qidong Wang ◽  
Taka-Aki Asoh ◽  
Hiroshi Uyama
Keyword(s):  
Mechanical Strength ◽  
Bacterial Cellulose ◽  
Composite Hydrogel ◽  
High Mechanical Strength

Anisotropic thermo-sensitive composite hydrogel based on bacterial cellulose was prepared by in situ polymerization, which could swell and deswell uniaxially.

scholarly journals A Review on Electrospun PVC Nanofibers: Fabrication, Properties, and Application

Fibers ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 12
Author(s):  
Le Quoc Pham ◽  
Mayya V. Uspenskaya ◽  
Roman O. Olekhnovich ◽  
Rigel Antonio Olvera Bernal
Keyword(s):  
Health Care ◽  
Corrosion Resistance ◽  
Water Treatment ◽  
Mechanical Strength ◽  
Oil Spill ◽  
Protective Clothing ◽  
Daily Life ◽  
High Porosity ◽  
Air Filtration ◽  
High Mechanical Strength

Polyvinyl chloride (PVC) is a widely used polymer, not only in industry, but also in our daily life. PVC is a material that can be applied in many different fields, such as building and construction, health care, and electronics. In recent decades, the success of electrospinning technology to fabricate nanofibers has expanded the applicability of polymers. PVC nanofibers have been successfully manufactured by electrospinning. By changing the initial electrospinning parameters, it is possible to obtain PVC nanofibers with diameters ranging from a few hundreds of nanometers to several micrometers. PVC nanofibers have many advantages, such as high porosity, high mechanical strength, large surface area, waterproof, and no toxicity. PVC nanofibers have been found to be very useful in many fields with a wide variety of applications such as air filtration systems, water treatment, oil spill treatment, batteries technology, protective clothing, corrosion resistance, and many others. This paper reviews the fabricating method, properties, applications, and prospects of PVC nanofibers.

scholarly journals In vitro resorbability and granular characteristics of 3D-printed hydroxyapatite granules versus allograft, xenograft, and alloplast

2021 ◽  
Author(s):  
Kongkrit Taecha-apaikun ◽  
Poonsak Pisek ◽  
Jintamai Suwanprateeb ◽  
Faungchat Thammarakcharoen ◽  
Uthaiwan Arayatrakoollikit ◽  
...  
Keyword(s):  
Weight Loss ◽  
Tooth Movement ◽  
Bone Allograft ◽  
High Porosity ◽  
Alveolar Cleft ◽  
Freeze Dried ◽  
3D Printed ◽  
Phosphate Buffered Saline ◽  
Bovine Xenograft

Abstract BackgroundThree-dimensionally printed hydroxyapatite (3DP HA) was investigated in regards to its functional properties supporting bone regeneration and tooth movement. The material’s high porosity and nanocrystal structure were investigated in terms of degradability, wicking property, and granular agglomeration in order to identify its potential for use as bone graft in alveolar cleft applications. Materials and methodsCommercially available bovine xenograft (Bio-Oss), biphasic calcium phosphate alloplast (BoneCeramic), and two types of freeze-dried bone allograft granules (SureOss Plus and RegenOss) were employed as control samples for comparison. In vitro degradability was studied by submerging the samples in pH 7.4 buffered solution at 37 o C for 28 days and determining subsequent weight loss percentage. The wicking property and granular agglomeration were evaluated by putting the granules in contact with deionized water, whole blood, and phosphate-buffered saline (PBS).ResultSureOss Plus and RegenOss showed the greatest weight loss at 28 days (6.64 and 8.91%, respectively) followed by 3DP HA (2.82%), Bio-Oss (0.21%), and BoneCeramic (0.20%). In contrast, 3DP HA showed significantly greater wicking ability than other samples for all types of tested liquids. SureOss Plus exhibited the greatest granular agglomeration for all liquid types followed by 3DP HA and Bio-Oss, Regenoss, and BoneCeramic, respectively.Conclusion3DP HA was found to be a favorable candidate for bone grafting in alveolar cleft treatment. Its resorption ability and exceptionally high wicking ability would be beneficial in bone healing and tooth movement. In addition, its moderate granular agglomeration capacity would help in graft handling and manipulation.

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