Silk sericin as a bio-initiator for grafting from synthesis of polylactide via ring-opening polymerization

Boonpavanitchakul, Kanittha; Jarussophon, Suwatchai; Pimpha, Nuttaporn; Magaraphan, Rathanawan

doi:10.1016/j.eurpolymj.2019.109265

Cited by 15 publications

(17 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The synthesized PLA (M w = 55,924 g/mole) and three types of SS-g-PLA (with PLA:SS weight ratio of 0.6:1, 1.4:1, and 2.1:1 for SS-g-PLA5, SS-g-PLA10, and SSg-PLA15, respectively) were prepared and thoroughly described in our previous work. 25 Briefly, the SS-g-PLA copolymers were synthesized via ring-opening polymerization (ROP) of L-lactide dimers and silk sericin with 0.625% (wt by monomer) Sn(Oct) 2 as a catalyst at140 C for 4 h under argon atmosphere. The resulting products were washed consecutively by chloroform, cold methanol, and hot water twice to remove all soluble impurities including the monomer and the free sericin as unreacted sericin.…”

Section: Methodsmentioning

confidence: 99%

“…These data corresponded with the T g values of the SS-g-PLA copolymers, which showed around 44.9 to 48.5 C in our previous work. 25 The re-crystallization phenomena during the heating process of the polymer revealed the cold crystallization and low chain mobility during quenching from the melting state into a randomly glassy state. 30,31 Generally, the crystallization of a polymer could occur above T g of the polymer.…”

Section: Thermal Behaviormentioning

confidence: 99%

“…According to PLA moiety in their structures, they were well miscible and dispersed in PLA, as reported in our previous work. 25 This study attempted to employ the formerly prepared SS-g-PLAs as bio-based nucleating agents and plasticizers for PLA. The biodegradable blended films from virgin PLA polymer and SS-g-PLAs (fixed composition of 25 wt%) were prepared by solution casting.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of sericin‐g‐PLA as an organic nucleating agent for preparing biodegradable blend films

Boonpavanitchakul

Pimpha

Magaraphan

2022

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Here for the first time, this work indicated that the sericin-g-polylactide (SS-g-PLA) copolymer can be potentially used as an organic nucleating agent to improve the crystallinity and biodegradability of polylactide (PLA). The properties of blended films containing SS-g-PLA mixed with virgin PLA polymer were highly evaluated. The water vapor permeability (WVP), thermal behavior, dynamic mechanical properties, crystal structure, and biodegradability of the PLA/SS-g-PLA-blended films were characterized and compared with a commercial PLA film. The results clearly indicated that the incorporation of SS-g-PLA copolymer in the PLA matrix had a significant effect on the properties of PLA/SS-g-PLA-blended films. The WVP values of PLA/SS-g-PLA-blended films were lower than that of commercial PLA film by about 2-3 gÁmm/m 2 ÁdayÁatm, and their thermal behaviors (e.g. T g , T cc , and T m ) were also decreased. Adding SS-g-PLA can increase the crystallinity of PLA. The degree of crystallinity (%χ c ) of the series of PLA/SS-g-PLA-blended films was increased to about 2-4 times that of the commercial PLA film (3%). Interestingly, biodegradation results revealed that the percent of biodegradability of PLA/SS-g-PLA-blended film was 80% in 43 days under a compost environmental temperature of 58 ± 2 C. This evidence indicated that the SS-g-PLA copolymer can improve the biodegradability of PLA.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Thermal Behaviormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of sericin‐g‐PLA as an organic nucleating agent for preparing biodegradable blend films

Boonpavanitchakul

Pimpha

Magaraphan

2022

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…PLA is obtained from lactic acid which is mainly isolated from sugar beets, potatoes, and corn [ 59 – 61 ]. There are two main methods of PLA production: polycondensation of lactic acid and ring-opening polymerization of lactide (extracted from lactic acid) [ 62 , 63 ]. According to Su et al’s [ 64 ] predictions, the amount of produced PLA will increase in the next 2 years.…”

Section: Biopolymer Matricesmentioning

confidence: 99%

Natural Biocidal Compounds of Plant Origin as Biodegradable Materials Modifiers

Pawłowska

Stepczyńska

2021

J Polym Environ

View full text Add to dashboard Cite

The article presents a literature review of the plant origin natural compounds with biocidal properties. These compounds could be used as modifiers of biodegradable materials. Modification of polymer material is one of the basic steps in its manufacturing process. Biodegradable materials play a key role in the current development of materials engineering. Natural modifiers are non-toxic, environmentally friendly, and renewable. The substances contained in natural modifiers exhibit biocidal properties against bacteria and/or fungi. The article discusses polyphenols, selected phenols, naphthoquinones, triterpenoids, and phytoncides that are natural antibiotics. Due to the increasing demand for biodegradable materials and the protection of the natural environment against the negative effects of toxic substances, it is crucial to replace synthetic modifiers with plant ones. This work mentions industries where materials containing natural modifying additives could find potential applications. Moreover, the probable examples of the final products are presented. Additionally, the article points out the current world’s pandemic state and the use of materials with biocidal properties considering the epidemiological conditions.

show abstract

“…Figure 2a displays the high-resolution C 1s core-level XPS spectra of the IP@S@GY1-HSA-Cd@GY2-modi ed surface with and without the 3NLG. The spectra of the surface featured three peaks at 284.8, 286.9, and 288.9 eV, which are assigned to the binding energy of C-C, C-O/C-N, and C = O of the protein coating, respectively [42].…”

Section: Characterization Of the Immunosensorsmentioning

confidence: 99%

Gradients of a Sandwich-structured Immunosensor Controlled Using Magnetized Masks for Determination of Human Serum Albumin Using Electrochemiluminescence

Huang

Chang

Huang

et al. 2021

Preprint

View full text Add to dashboard Cite

Background: Separation of macromolecules or particles from a colloid system to from gradient structure on the surface has been employed for biosensing systems, suggesting an enhancement of the chemical and physical features of particles. Performance of an electrochemiluminescence (ECL) immunosensor was employed to improve with a particle gradient.Results: Magnetic beads with silicon dioxide coating were adopted as nanocarriers for gradient manipulation and immobilized with the primary antibody. Cadmium telluride quantum dots (CdTe QDs) were coated with a layer of protein G for conjugation and orientation of secondary antibody as signal labels. ECL immunosensor gradients upon the electrode were formed by magnetolithography with magnetized nickel masks of column and stripe arrays at various scales. The immunosensor generally aggregated as island on the substrate through a dry process of water evaporation leading to a decrease of efficiency in the characteristic signals. Stripe arrays of magnetized nickel were designed to generate cylindrical magnetic flux on the substrate to improve the particle manipulation with the gradient. Various gradients of the sandwich-structured immunosensor substantially affected the electrochemical performance. Compared to the gradient-free immunosensor, the gradient of the immunosensor generated using the 3-μm-stripe array mask of magnetolithography enhanced the ECL intensity ~2.2 times. Conclusions: The results of quantification of human serum albumin (HSA) with the gradient immunosensor showed a broad linear range (15–420 ng mL−1), a low limit of detection (8 ng mL−1) and high reliability for HSA-spiked serum samples, indicating that the immunosensor gradient substantially enhances the performance of the ECL assay.

show abstract

Silk sericin as a bio-initiator for grafting from synthesis of polylactide via ring-opening polymerization

Cited by 15 publications

References 40 publications

Influence of sericin‐g‐PLA as an organic nucleating agent for preparing biodegradable blend films

Influence of sericin‐g‐PLA as an organic nucleating agent for preparing biodegradable blend films

Natural Biocidal Compounds of Plant Origin as Biodegradable Materials Modifiers

Gradients of a Sandwich-structured Immunosensor Controlled Using Magnetized Masks for Determination of Human Serum Albumin Using Electrochemiluminescence

Contact Info

Product

Resources

About