Vim li cas kev sib txuas yog qhov tseem ceeb?

Cov txheej txheem:

Vim li cas kev sib txuas yog qhov tseem ceeb?
Vim li cas kev sib txuas yog qhov tseem ceeb?

Video: Vim li cas kev sib txuas yog qhov tseem ceeb?

Video: Vim li cas kev sib txuas yog qhov tseem ceeb?
Video: Qhov Lus Zais Tob ntawm Neeg Leej Tub qhov Kev Rov Qab Los (Ntsiab Lus Tseem Ceeb) 2024, Hlis ntuj nqeg
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Cross-link yog ib daim ntawv cog lus uas txuas ib lub xov tooj polymer mus rau lwm tus. … Hla txuas ua rau cov molecular loj ntawm ib lub polymer. Cross-linked polymers yog ib qho tseem ceeb vim tias lawv yog cov neeg kho tshuab muaj zog thiab tiv taus cua sov, hnav thiab tawm tsam los ntawm cov kuab tshuaj.

Vim li cas kev sib txuas sib txuas tseem ceeb?

Cross-linking yog txheej txheem ntawm stabilizing collagen los ntawm kev tsim cov kev sib txuas tshiab ntawm cov strands ntawm collagen; Cov txheej txheem no inhibits degradation ntawm collagen los ntawm proteases thiab prolongs nws muaj nyob rau hauv lub qhov txhab [28]. Hom kev sib txuas ntawm txoj kev sib txuas uas tshwm sim ncaj qha cuam tshuam rau kev ua haujlwm ntawm acellular matrices.

Lub hom phiaj tseem ceeb ntawm kev sib txuas hauv cov polymers yog dab tsi?

Polymers rau Cov Khoom Siv Ua Haujlwm Zoo Tshaj Plaws Los ntawm kev sib txuas, cov qauv ntawm cov tshuaj polymer tuaj yeem kho tau. Qhov tshwm sim ntawm cov tes hauj lwm polymer (los yog gels) qhia tus cwj pwm elastic thiab, nyob ntawm seb lub cev, cov khoom siv zoo. Polymer tes hauj lwm muaj peev xwm o los ntawm uptakes dej los yog organic solvents.

Kev sib txuas sib txuas ua rau dab tsi?

Qhov tsim ntawm covalent daim ntawv cog lus uas tuav qee feem ntawm ob peb cov saw hlau ua ke yog hu ua cross-linking. Kev sib txuas ntau yam tshwm sim hauv ib qho kev sib txuas peb-seem sib txuas ntawm cov saw hlau sib txuas, raws li pom hauv daim duab.

Puas hla kev txuas ua kom nws muaj zog?

Crosslinked los yog "ua ke ua ke" chains yuav coj txawv txawv. Lawv yuav tsis ntws ntau npaum li kev ntxhov siab xws li rub lossis cua sov. Lawv yuav tsis o ntau npaum li nyob rau hauv ib qho hnyav li unbound chains, uas txhim kho tshuaj lom neeg / hnyav kuj. Thiab, lawv yuav ua kom muaj zog / tawv dua txheej lossis binder

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