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The Properties of Native silk Fibroin (SF) Solution/Gel from Bombyx mori silkworms during the Full Fifth Instar Larval Stage

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Journal of Wuhan University of Technology(Materials Science) 2011年第2期26卷 263-269页

作者：王洪 Key Laboratory of Textile Science & Technology Ministry of EducationDonghua University

The properties of native silk fibroin （SF） solution in the gland of silkworms during the full fifth instar larval stage were examined in an attempt to elucidate the mechanism of natural silk spinning in the *** flow and gelation behavior,birefringence phenomenon,rheological properties,specific viscosity and conformation of SF solutions from the gland of silkworms were measured by polarized light microscope,HAKKE rheometer,Ubbelohde viscometer and Solid-state 13C NMR,*** comparing their properties with regenerated SF solutions from natural silk fibers,it is believed that there exists a progressive maturation process favorable to spin silk fibers with excellent properties from native SF solution and a weak bonded and highly oriented SF gel network with SF molecules partly extended in α-helix conformation is formed in the middle section of the gland of *** suggests that a biomimetic maturation process for making spinnable solution might be necessary for artificial silk fiber spinning in order to obtain improved fiber properties.

关键词： silk fibre spin viscosity sol/gel

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Characterization of silkworm larvae growth and properties of silk fibres after direct feeding of copper or silver anoparticles

Characterization of silkworm larvae growth and properties of...

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中国蚕学会第九届青年学术研讨会

作者： Lan Cheng Huiming Huang Shaoyong Chen Wenlu Wang Fangyin Dai Hongping Zhao Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile College of Textile and GarmentSouthwest University Institute of Biomechanics and Medical Engineering Tsinghua University State Key Laboratory of silkworm Genome Biology Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural MinistryCollege of BiotechnologySouthwest University

In this study,we raised silkworm larvae from the fifth instar with a modified diet of copper or silver nanoparticles（NPs） combined with mulberry *** larvae growth was characterized according to larvae weight,survival rate,cocooning and silk glands *** or Ag element distributions in their tissues were examined with inductively couple plasma mass *** properties of silkworm silks were investigated with Fourier transform infrared（FTIR） and amino acid analyses,thermogravimetric and quasi-static tensile *** results depicted a primary concentration distribution map of Cu or Ag element in silkworm larva tissues by the modified diet,and Cu or Ag NPs had slightly negative influences on the growth of the silkworm *** from FTIR spectra and amino acid analyses showed that the Cu or Ag NPs slightly inhibited the β-sheet conformation transition and promoted the crystallization of silk ***,copper or silver NPs obviously enhanced the thermal stability and mechanical properties of silkworm silk with a coupling competitive *** study expands our ability to obtain distinctive reinforced silkworm silks in a green and effective way and to gain an elementary comprehension of nano-bio interactions between a model organism,Bombyx mori silkworm,and metallic nanoparticles.

关键词： Bombyx mori silkworm metallic nanoparticles silk gland silk fibre metallic element distribution mechanical property

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