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[ CAS No. 626-19-7 ] {[proInfo.proName]}

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Chemical Structure| 626-19-7
Chemical Structure| 626-19-7
Structure of 626-19-7 * Storage: {[proInfo.prStorage]}

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Mingen Fei ; Wangcheng Liu ; Lin Shao , et al. DOI:

Abstract: Natural fiber composites are inexpensive and renewable alternatives to traditional fiber reinforced polymers(FRPs). However, existing natural fiber composites primarily rely on petrochemical based thermosetting matrices, which are difficult to recycle due to their stable crosslinked network structures. To address this challenge, it is desirable to develop natural fiber composites with inherently recyclable biobased matrices. In this study, we developed a dual dynamic network vitrimer matrix from hempseed oil and limonene derivatives and demonstrated its application in hemp fiber reinforced composites. To improve the weak interface between hemp fiber and the polymer matrix, a common challenge in the realm of natural fiber composites, we directly incorporated amino silane into the vitrimer matrix. The amino silane participated in the polymer network, increasing the crosslink density and toughening the matrix, as evidenced by the significant improvement of impact strength from 3.5 kJ/m2 to 10.3 kJ/m2. Moreover, the incorporation of amino silane resulted in a lower water absorption by 11 % in a 7-day soaking for the composites, demonstrating improved fiber/matrix interfacial interaction. Furthermore, our biobased vitrimer matrix exhibits both imine and hydroxy-ester dynamic bonds, which enable the recycling of the biocomposite through a mild and cost-effective aminolysis process (100℃, 3 h, ambient pressure). The decomposed polymer matrix was successfully reused as a polyol for polyurethane adhesives, and the surface morphology of recovered hemp fibers was analyzed and compared with that of the original fibers. These findings will help broaden the use of vitrimers for practical natural fiber composite applications, raise awareness of the problem of recycling natural fiber composite waste, and shed light on the interfacial challenge of natural fiber reinforced vitrimer composites.

Keywords: Natural fiber composites ; Hemp fiber ; Vitrimer ; Silane incorporation ; Aminolysis

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Product Details of [ 626-19-7 ]

CAS No. :626-19-7 MDL No. :MFCD00003372
Formula : C8H6O2 Boiling Point : -
Linear Structure Formula :- InChI Key :IZALUMVGBVKPJD-UHFFFAOYSA-N
M.W : 134.13 Pubchem ID :34777
Synonyms :

Calculated chemistry of [ 626-19-7 ]      Expand+

Physicochemical Properties

Num. heavy atoms : 10
Num. arom. heavy atoms : 6
Fraction Csp3 : 0.0
Num. rotatable bonds : 2
Num. H-bond acceptors : 2.0
Num. H-bond donors : 0.0
Molar Refractivity : 37.22
TPSA : 34.14 ?2

Pharmacokinetics

GI absorption : High
BBB permeant : Yes
P-gp substrate : No
CYP1A2 inhibitor : Yes
CYP2C19 inhibitor : No
CYP2C9 inhibitor : No
CYP2D6 inhibitor : No
CYP3A4 inhibitor : No
Log Kp (skin permeation) : -6.33 cm/s

Lipophilicity

Log Po/w (iLOGP) : 0.98
Log Po/w (XLOGP3) : 1.11
Log Po/w (WLOGP) : 1.31
Log Po/w (MLOGP) : 0.77
Log Po/w (SILICOS-IT) : 2.14
Consensus Log Po/w : 1.26

Druglikeness

Lipinski : 0.0
Ghose : None
Veber : 0.0
Egan : 0.0
Muegge : 1.0
Bioavailability Score : 0.55

Water Solubility

Log S (ESOL) : -1.68
Solubility : 2.78 mg/ml ; 0.0208 mol/l
Class : Very soluble
Log S (Ali) : -1.42
Solubility : 5.1 mg/ml ; 0.038 mol/l
Class : Very soluble
Log S (SILICOS-IT) : -2.26
Solubility : 0.735 mg/ml ; 0.00548 mol/l
Class : Soluble

Medicinal Chemistry

PAINS : 0.0 alert
Brenk : 1.0 alert
Leadlikeness : 1.0
Synthetic accessibility : 1.0

Safety of [ 626-19-7 ]

Signal Word:Warning Class:N/A
Precautionary Statements:P261-P280-P305+P351+P338 UN#:N/A
Hazard Statements:H302-H315-H319-H332-H335 Packing Group:N/A
GHS Pictogram:

Application In Synthesis of [ 626-19-7 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Upstream synthesis route of [ 626-19-7 ]
  • Downstream synthetic route of [ 626-19-7 ]

[ 626-19-7 ] Synthesis Path-Upstream   1~1

  • 1
  • [ 626-19-7 ]
  • [ 95-54-5 ]
  • [ 29914-81-6 ]
Reference： [1] Tetrahedron Letters, 2008, vol. 49, # 43, p. 6237 - 6240
[2] Farmaco (Societa chimica italiana : 1989), 2002, vol. 57, # 7, p. 543 - 548
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