Article
Chemistry, Multidisciplinary
Rong Wang, Xiaojie Sun, Lanlan Chen, Wenbin Liang
Summary: In this study, biodegradable blends of PGA and PBAT with in situ compatibilization using MDI were prepared. The addition of PBAT was found to increase the complex viscosity and storage modulus of the blends, leading to improved compatibility and impact strength. The morphology of the dispersed phase evolved from spherical structure to in situ microfiber, enhancing interfacial adhesion and improving toughness.
Article
Materials Science, Multidisciplinary
Yanan Wang, Xinyang Li, Yalan Zhang, Xiaohui Wang, Yichen Li, Yijia Liu, Dong Wang, Guojin Liu, Yi Huang, Jianzhong Shao
Summary: By synthesizing degradable PMMA colloidal nanospheres and preparing pre-crystallized PMMA liquid photonic crystals, combined with shear-induced assembly technique and surface pretreated PU polymer layer, rapid structural coloration of textiles is achieved, with excellent structural stability and color saturation of the photonic crystals.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Polymer Science
Hideto Tsuji, Kazumasa Iguchi, Yuki Arakawa
Summary: The research studied the effects of different molecular weights of crystalline blocks but similar overall molecular weights on the crystallization behavior, structure, morphology, and thermal properties of PLLA-b-PDLLA/PDLA-b-PDLLA blends. It was found that the incorporated long amorphous PDLLA blocks facilitated unique SC crystallization in the blends with different crystalline block fractions.
Article
Polymer Science
Prasong Srihanam, Yaowalak Srisuwan, Theeraphol Phromsopha, Apirada Manphae, Yodthong Baimark
Summary: In this study, the phase compatibility and mechanical properties of flexible poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide) (PLLA-PEG-PLLA)/thermoplastic starch (TPS) blends were improved by adding citric acid (CA) as a compatibilizer. The crystallinity of PLLA-PEG-PLLA matrix was suppressed and the thermal stability was enhanced by CA modification of TPS. The compatibility between TPS and PLLA-PEG-PLLA phases was improved, and the blends exhibited increased tensile strength, elongation at break, and Young's modulus with higher CA content.
Article
Polymer Science
Yaowalak Srisuwan, Yodthong Baimark
Summary: In this study, high-molecular-weight poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide) triblock copolymer (PLLA-PEG-PLLA) was used as a biodegradable bioplastic. However, its high cost and poor thermal stability limited its applications. Native cassava starch was blended to reduce the production cost and improve the thermal stability. The interaction between starch and PEG increased the thermal stability and phase adhesion, resulting in flexible and hydrophilic films with potential applications in biomedical, packaging, and agricultural fields.
Article
Engineering, Chemical
Cynthia Xix-Rodriguez, Paulina Varguez-Catzim, Alejandro Alonzo-Garcia, Nayeli Rodriguez-Fuentes, Humberto Vazquez-Torres, Abigail Gonzalez-Diaz, Manuel Aguilar-Vega, Maria Ortencia Gonzalez-Diaz
Summary: Hemocompatible membranes were obtained by blending poly(lactic acid) with three different amphiphilic block copolymers, showing promising balance between molecule transport and protein retention. The copolymers segregated to the membrane surface and led to improved anti-fouling properties and water flow. These membranes exhibited hemocompatibility, non-hemolyzing properties, and fine-tuned toxin separation with high retention of desirable proteins.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Materials Science, Biomaterials
Jianhua Zhang, Junfei Hu, Baoshu Chen, Tianbao Zhao, Zhipeng Gu
Summary: The PAA/PEA hybrid hydrogel dressing exhibits good antioxidant properties which can promote wound healing, support cell proliferation, and angiogenesis. Experimental results on mouse skin wounds demonstrate that the hybrid hydrogel scaffolds significantly accelerate the wound healing process, showing superior healing effects.
REGENERATIVE BIOMATERIALS
(2021)
Article
Polymer Science
Prasong Srihanam, Wiriya Thongsomboon, Yodthong Baimark
Summary: The aim of this study was to modify PLLA-b-PEG-b-PLLA copolymer using low-cost CaCO3 filler to improve its material properties. The addition of CaCO3 enhanced the crystallinity and thermal stability of PLLA-b-PEG-b-PLLA matrix. SEM analysis showed stronger interfacial adhesion between PLLA-b-PEG-b-PLLA and CaCO3 compared to PLLA and CaCO3. Tensile testing revealed increased stress and modulus for PLLA-b-PEG-b-PLLA matrix with CaCO3, while these properties significantly decreased for PLLA matrix. Therefore, CaCO3 shows promise as an inexpensive filler for improving PLLA-b-PEG-b-PLLA bioplastics.
Article
Materials Science, Multidisciplinary
Jissy Jacob, Vijay Robert, Ravi Babu Valapa, Sunny Kuriakose, Sabu Thomas, Sravanthi Loganathan
Summary: The search for sustainable plastics is driven by the environmental pollution issues associated with petrochemical-derived plastics. Bioplastics, such as poly(lactic acid) (PLA), are increasingly being used in packaging due to limited fuel resources. However, poor ductility and gas barrier characteristics limit the use of PLA as food packaging material. This study aims to overcome these limitations by fabricating PLA/polyethylenimine-modified mesoporous silica (PEI-MS) composites. The influence of PEI content in MS and wt % loadings of optimized PEI content in MS on the properties of PLA is investigated in detail. The results show that PEI-MS modification improves the thermal stability and mechanical properties of PLA.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jissy Jacob, Vijay Robert, Ravi Babu Valapa, Sunny Kuriakose, Sabu Thomas, Sravanthi Loganathan
Summary: This study focuses on the fabrication of PLA/PEI-MS composites to improve the limitations of PLA as food packaging material. The addition of PEI-MS enhanced thermal stability and mechanical properties while reducing oxygen transmission rate for PLA composites.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Dawei Luo, Weijun Zhen, Chengyuan Dong, Ling Zhao
Summary: In this study, amino-functionalized nano-SiO2 (m@g-SiO2) was synthesized and used as fillers to prepare PLA/m@g-SiO2 nanocomposites, improving their mechanical properties, crystallization behavior, and thermal stability. The surface modification of m@g-SiO2 significantly enhanced the interaction energy and miscibility between the filler and PLA bulk, as confirmed by multi-scale investigation through rheological behaviors analysis and molecular dynamics simulations.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Polymer Science
Xinyi Dong, Zhenggui Wu, Yang Wang, Ting Li, Hao Yuan, Xuhui Zhang, Piming Ma, Mingqing Chen, Jing Huang, Weifu Dong
Summary: By synthesizing phosphorus-containing core-shell starch nanoparticles, the toughness and flame retardancy of polylactide (PLA) can be improved simultaneously, enhancing its elongation at break and flame retardant rating, and expanding the application possibilities of PLA.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Composites
Ting-Ni Jen, Kartik Behera, Yen-Hsiang Chang, Fang-Chyou Chiu
Summary: In this study, PLA/TPEE blend and blend-based nanocomposites with CNT as a nanofiller were prepared. Results showed that the presence of CNT significantly improved the properties of the blend, including crystallizability, elongation at break, impact strength, and electrical resistivity. The addition of CNT also led to the formation of a pseudo-network structure, affecting the rheological properties of the blend.
POLYMER COMPOSITES
(2023)
Article
Polymer Science
Tomomichi Itoh, Minami Okuno, Yoshihiro Moriya, Hiroaki Shimomoto, Eiji Ihara
Summary: This study focused on using poly(acrylic acid) block copolymers as stabilizers to modify the surfaces of polymer particles during dispersion polymerization. Polystyrene-block-poly(acrylic acid) was found to have better control over particle size range and surface density compared to poly(acrylic acid) homopolymer. The impact of heterogeneity between the polymer species of the particle core and attached polystyrene or PMMA chains in the poly(acrylic acid) block copolymers was also investigated.
Article
Chemistry, Physical
Olawale Monsur Sanusi, Abdelkibir Benelfellah, Lazaros Papadopoulos, Zoi Terzopoulou, Lamprini Malletzidou, Isaak G. Vasileiadis, Konstantinos Chrissafis, Dimitrios N. Bikiaris, Nourredine Ait Hocine
Summary: In this study, a hybrid nanofiller of Mt and MWCNT was successfully prepared and incorporated into PLA matrix to improve the material properties. Physicochemical studies and structural analyzes revealed strong hybrid-polymer interaction and synergy between nanoclay and carbon nanotubes. Thermal characterizations and mechanical properties testing demonstrated that the Mt/MWCNT hybrid nanofillers effectively restricted the motion of PLA segments and enhanced the mechanical performance of the polymer matrix.
APPLIED CLAY SCIENCE
(2021)
Article
Polymer Science
Bich Nam Jung, Hyun Wook Jung, DongHo Kang, Gi Hong Kim, Jin Kie Shim
Article
Polymer Science
Do Young Kim, Jae Woo Park, Dong Yun Lee, Kwan Ho Seo
Article
Polymer Science
Do Young Kim, Jae Bin Lee, Dong Yun Lee, Kwan Ho Seo
Article
Chemistry, Multidisciplinary
Jongmin Park, Minjung Park, Dong Soo Choi, Hyun Mo Jung, Sung Wook Hwang
APPLIED SCIENCES-BASEL
(2020)
Article
Engineering, Environmental
Sung Wook Hwang, Woo Sik Jung, Do Young Kim, Kwan Ho Seo
Summary: Poly(lactic acid) (PLA) was modified with dicumyl peroxide (DCP) and tetraglycidyl diamino diphenyl methane (TGDDM) to improve melt viscosity and molecular weight. While DCP led to branching or crosslinking and decreased melt flow index, TGDDM resulted in chain extension or branching and increased number- and weight-average molecular weights. The mechanical properties of modified PLA showed marginal changes, with slight decreases in elongation at break observed.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Polymer Science
Bich-Nam Jung, Hyun-Wook Jung, Dong-Ho Kang, Gi-Hong Kim, Jin-Kie Shim
Summary: In this study, PP/nanoclay nanocomposites were prepared by biaxial stretching method, which showed improved oxygen barrier properties with increased draw ratio and nanoclay content, resulting in a reduced oxygen permeability value of 43.5 cc center dot mm/m(2)center dot day center dot atm. The composite also exhibited stable oxygen permeability values under increased relative humidity, along with enhanced mechanical and thermal properties. The biaxially-stretched PP/nanoclay nanocomposite shows potential as a replacement for multi-layered packaging materials.
Article
Engineering, Chemical
Dongho Kang, Sungwook Hwang, Bichnam Jung, Jinkie Shim
Summary: The study used melt processing technique to disperse single-walled carbon nanotubes into a polypropylene matrix, finding that as the SWNT content increased, the physical properties of the composite material also improved. However, there were relatively large particle agglomerates when the SWNT content exceeded a certain threshold.
Article
Polymer Science
Gi-Hong Kim, Dong-Ho Kang, Bich-Nam Jung, Jin-Kie Shim
Summary: This study investigates the adsorption behavior of silica nanoparticles on cellulose nanofibrils (CNFs) and successfully modifies the CNF/silica nanocomposite surfaces with hexadecyltrimethoxysilane (HDTMS), resulting in enhanced hydrophobicity.
Article
Polymer Science
Gi H. Kim, Sung W. Hwang, Dong H. Kang, Bich N. Jung, Mi J. Lee, Jin K. Shim, Kwan H. Seo
JOURNAL OF POLYMER SCIENCE
(2020)
