Kev lag luam aerospace qhov kev thov rau lub teeb yuag, siab - lub zog, thiab cov ntaub ntawv sib xyaw ua tau zoo tau ua rau muaj kev cuam tshuam hauv epoxy resin-raws li carbon fiber prepreg thev naus laus zis, tsom mus rau ntau yam - nplai qauv tsim thiab kev txhim kho kev sib tshuam. Cov kab lus no tau tshawb fawb txog cov txheej txheem kev sib txuas ntawm lub ntsej muag thiab ntau yam - nplai kev sib koom ua ke los ntawm kev pom nrog rau cov pa roj carbon fiber ntau hloov kho, kev tswj hwm nanoreinforcement, resin matrix toughening, thiab cov txheej txheem optimization. Siv aerospace- qib prepreg npaj cov ntaub ntawv tshawb fawb, nws tawm tswv yim txoj hauv kev kev sib koom ua ke ntawm molecular dynamics simulations nrog cov txheej txheem parameter coupling optimization, muab theoretical kev txhawb nqa rau tom ntej - tiam aerospace composite txoj kev loj hlob.
Carbon Fiber Reinforced Epoxy Composites (CFRP), CFRP tau dhau los ua cov khoom tseem ceeb rau aerospace thawj thauj khoom -cov kabmob vim nws lub zog tshwj xeeb, qaug zog tiv thaiv, thiab tsim kom yooj yim. Txawm li cas los xij, cov kev sib tw tseem muaj: tsis muaj peev xwm sib cuam tshuam lub zog vim yog cov pa roj carbon fiber ntau inertness, toughness deficiencies los ntawm crosslinked resin matrices, thiab porosity tswj thaum lub sij hawm complex khoom. Kev tshawb fawb tsis ntev los no qhia txog ntau yam -txheej txheem kev tswj hwm thiab kev sib txuas ntawm cov tshuaj sib txuas. Synergistic cuam tshuam los ntawm nanoparticles, whiskered lug, thiab molecular - theem interface tsim yuav ua tau zoo dua load hloov efficiency thiab puas kam rau ua.
I. Multi-Scal Carbon Fiber Surface Modification
1,Tshuaj Grafting & Oxidation
Oxidation: Gas-theem (O₃/O₂ mixs) los yog kua-theem (HNO₃ immersion) oxidation qhia carboxyl/hydroxyl pawg los txhim kho wettability.
Grafting: Amino-tawm naphthalene diimide (NDI) lossis polyethyleneimine (PEI) grafting tsim covalent bonds ntawm fibers thiab epoxy. PEI (MW=600) nce kev sib tshuam shear zog (IFSS) los ntawm 38.9% thiab flexural zog los ntawm 36.7%.
2,Nanoreinforcement Hybrid Hloov Kho
CNTs Grafting: CNTs anchored ntawm π-π stacking thiab carboxyl-amine cov tshuaj tiv thaiv tsim "rivet" qauv. Ntawm CF-PEI/CNT-COOH=2: 1 huab hwm coj piv, IFSS nce 74.1% thiab flexural zog los ntawm 55.2%.
GO Anchoring: Vertically aligned GO nplooj ntawv tsim nruab nrab -modulus interlayers rau kev ntxhov siab. Optimal CF-PEI/GO=40: 1 piv ua tiav nanoscale interlayer sib nrug tswj.
3,Whiskerization & Nanofiber Interfaces
Chlorinated Aramid Nanofiber (CI-ANF) Txheej: Plasma- kho fibers coated nrog CI-ANF tes hauj lwm los ntawm dip- txheej txhim kho IFSS los ntawm 79.8% thiab luv-beam shear zog (SBS) los ntawm 33.7% zog, thiab vander kev sib cuam tshuam, tsis muaj kev cuam tshuam lub zog tensile.
II. Epoxy Matrix Toughening & Rheology Tswj
1,Reactive Interpenetrating Networks
Core-cov roj hmab plhaub los yog cov khoom siv thermoplastic/epoxy sib xyaw ua cov sib txuas sib txuas. Ntawm 10% toughener cov ntsiab lus, compression-tom qab- cuam tshuam (CAI) lub zog nce mus txog 330 MPa, tawg toughness nce 40%, nrog tsuas yog 6℃Tg txo.
2,Rheology Optimization
Reactive diluents (piv txwv li, butyl glycidyl ether) txo cov viscosity ntawm 5000 mus rau 1500 mPa·s, txhim kho fiber ntau impregnation thiab txo qis prepreg porosity.
III. Multi-Scale Process Synergy
1,Interface Regulation & Melt Impregnation
Compatibilizers txhim kho fiber ntau / thermoplastic adhesion (xws li, kev txhim kho IFSS tseem ceeb).
Transcrystallinity tswj: Kub / lub sij hawm optimization nce transcrystalline txheej thickness thiab interfacial zog.
2,Aerospace Prepreg Case Studies
T800 Carbon Fiber / Epoxy: Areal ntom 120 g / m², resin cov ntsiab lus 38%, tensile zog 2800 MPa (tis daim tawv nqaij daim ntaub ntawv).
Toray T1100G / 3960 Resin: Tensile zog 6.3 GPa, modulus 310 GPa (Airbus A350 fuselage).
IV. Interfacial Mechanisms & Cov yam ntxwv
Ntau -Sale Interface Models
- Mechanical interlock txoj kev xav: Nto roughness txhim khu fiber ntau / resin anchoring.
- Chemical bonding theory: Covalent bonds ntawm grafted functional pawg.
- Interphase txoj kev xav: Nruab nrab -modulus interlayers mitigate stress concentration.
Microscopy Techniques
- XPS: Surface Chemistry tsom xam.
- SEM: Interface morphology/failure modes.
- AFM: Roughness / elastic modulus gradient daim ntawv qhia.
V. Cov ntsiab lus & Outlook
Epoxy-raws li carbon fiber prepregs xav tau ntau- nplai hloov kho, matrix toughening, thiab txheej txheem kev sib koom ua ke los txhawb kev siv aerospace. Cov lus qhia yav tom ntej:
- Bio-raws li compatibilizers: Rov ua dua lwm txoj hauv kev los txo qhov cuam tshuam ib puag ncig.
- Cov ntxaib digital: Cov txheej txheem simulation los ua kom zoo dua porosity thiab fiber ntau faib.
- Tus kheej -kho qhov cuam tshuam: Dynamic covalent bonds/supramolecular cuam tshuam rau kev kho puas tsuaj.
Los ntawm kev sib koom ua ke ntawm kev tsim kho tshiab, cov kev sib xyaw no yuav nthuav dav mus rau hauv cov ntawv thov huab cua xws li cov cav ntoo thiab sib sib zog nqus -chaw sojntsuam, tsav lub tshuab aerospace mus rau qhov sib dua, muaj zog dua, thiab ntse dua.
Source: Composites Eco-Circle