Multi-layered microcapsules for cell encapsulation

Chia, Ser Mien; Wan, Andrew C.A.; Quek, Chai Hoon; Mao, Hai‐Quan; Xu, Xiaoyun; Shen, Lu; Ng, Mah-Lee; Leong, Kam W.; Yu, Hanry

doi:10.1016/s0142-9612(01)00191-0

Cited by 71 publications

(31 citation statements)

References 13 publications

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“…The success of alginate microcapsules for islet transplantation is determined predominantly by purity and endotoxin content, as demonstrated by Omer et al (2005) (discussed in section IV.A.3.). Several other biomaterials may also be used for islet encapsulation, e.g., HEMA, methacrylic acid, and methyl methacrylate (Chia et al, 2000(Chia et al, , 2002Sanders et al, 2005).…”

Section: A Immunoisolation Of Transplanted Isletsmentioning

confidence: 99%

Biological and Biomaterial Approaches for Improved Islet Transplantation

2006

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Section: A Immunoisolation Of Transplanted Isletsmentioning

confidence: 99%

Biological and Biomaterial Approaches for Improved Islet Transplantation

2006

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“…The shift of 28 cm -1 results from the formation of hydrogen bond in the nanocomposites. 25 The hydrogen bonding interaction between the Al 2 O 3 /SnO 2 co-nanoparticles and the grafted collagen also leads to violet shifts of some FTIR bands of the grafted collagen, for example, the absorption peaks at 554 and 1110 cm -1 were shifted to 639 and 1167 cm -1 , respectively. …”

Section: Preparation Of Grafted Collagen-al 2 O 3 /Sno 2 Nanocompositementioning

confidence: 99%

“…23,24 The polymer of MMA (PMMA) obtained by using 2,2'-azobis(isobutyronitrile) as an initiator possesses good biocompatibility and has been used in biomedical field particularly in strengthening of some biopolymer. 23,25 In this paper, we prepared a grafted collagen matrix with a graft copolymerization method and synthesized Al 2 O 3 /SnO 2 co-nanoparticles by a modified sol-gel technique followed by a thermal treatment process. The nanocomposites were obtained by direct incorporation of the Al 2 O 3 /SnO 2 co-nanoparticles into the grafted collagen matrix under ultrasonic wave irradiation.…”

Section: Introductionmentioning

confidence: 99%

Al₂O₃/SnO₂ Co‐Nanoparticle Modified Grafted Collagen for Improving Thermal Stability and Infrared Emissivity

Cao

Zhou²,

Shan

et al. 2007

Chin. J. Chem.

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Al 2 O 3 /SnO 2 co-nanoparticles were prepared with a modified sol-gel technique followed by a thermal treatment process. With these co-nanoparticles the grafted collagen-Al 2 O 3 /SnO 2 nanocomposites were obtained using a supersonic dispersion method. X-ray diffraction, FT-IR analysis, transmission electron microscopy, TGA/DTA and infrared emissivity test were performed to characterize the resulting nanoparticles and nanocomposites, respectively. The Al 2 O 3 /SnO 2 co-nanoparticles showed a narrow distribution of size between 20-40 nm and could be uniformly absorbed on the tri-helix scaffolds of the grafted collagen without any aggregation. The nanocomposites possessed better thermal stability and substantially lower infrared emissivity than the grafted collagen and Al 2 O 3 /SnO 2 co-nanoparticles with an increase of degradation temperature from 39 to 210 ℃ and a decrease of infrared emissivity from 0.850 of the grafted collagen and 0.708 of the Al 2 O 3 /SnO 2 co-nanoparticles to 0.424, which provided a potential application of the nanocomposites to areas such as photoelectronics.

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“…From biology [1][2][3][4][5] to chemistry [6][7][8][9] and medicine [10][11][12][13], microdroplets have been used for volume control, protection, and transportation of samples. Moreover, microdroplets have provided an environment for the uniform and functional synthesis of microcapsules in industrial fields such as textiles [14,15] and cosmetics [16].…”

Section: Introductionmentioning

confidence: 99%

Formation of Polymeric Hollow Microcapsules and Microlenses Using Gas-in-Organic-in-Water Droplets

et al. 2015

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This paper presents methods for the formation of hollow microcapsules and microlenses using multiphase microdroplets. Microdroplets, which consist of a gas core and an organic phase shell, were generated at a single junction on a silicon device without surface treatment of the fluidic channels. Droplet, core and shell dimensions were controlled by varying the flow rates of each phase. When the organic solvent was released from the organic phase shell, the environmental conditions changed the shape of the solidified polymer shell to either a hollow capsule or a microlens. A uniform solvent release process produced polymeric capsules with nanoliter gas core volumes and a membrane thickness of approximately 3 μm. Alternatively physical rearrangement of the core and shell allowed for the formation of polymeric microlenses. On-demand formation of the polymer lenses in wells and through-holes polydimethylsiloxane (PDMS) structures was achieved. Optical properties of the lenses were controlled by changing the dimension of these structures. OPEN ACCESSMicromachines 2015, 6 623

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Multi-layered microcapsules for cell encapsulation

Cited by 71 publications

References 13 publications

Biological and Biomaterial Approaches for Improved Islet Transplantation

Biological and Biomaterial Approaches for Improved Islet Transplantation

Al₂O₃/SnO₂ Co‐Nanoparticle Modified Grafted Collagen for Improving Thermal Stability and Infrared Emissivity

Formation of Polymeric Hollow Microcapsules and Microlenses Using Gas-in-Organic-in-Water Droplets

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Multi-layered microcapsules for cell encapsulation

Cited by 71 publications

References 13 publications

Biological and Biomaterial Approaches for Improved Islet Transplantation

Biological and Biomaterial Approaches for Improved Islet Transplantation

Al2O3/SnO2 Co‐Nanoparticle Modified Grafted Collagen for Improving Thermal Stability and Infrared Emissivity

Formation of Polymeric Hollow Microcapsules and Microlenses Using Gas-in-Organic-in-Water Droplets

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Product

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Al₂O₃/SnO₂ Co‐Nanoparticle Modified Grafted Collagen for Improving Thermal Stability and Infrared Emissivity