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Tef ɗin Adhesive PTFE ?
Ta yaya za a iya inganta juriya mai rarrafe da kwanciyar hankali na dogon lokaci na babban tef ɗin teflon mai zafi
Ta yaya za a iya inganta juriya mai rarrafe da kwanciyar hankali na dogon lokaci na babban tef ɗin teflon mai zafi?
Abubuwan da aka kera sun yi amfani da suMQsiliconeresinas da coretackifier da ƙarfafa ƙarfafawa, haɓaka MQ/gumratioto1.2:1–2:1 (mafi girma fiye da na al'ada).Wannan babbanMQratio yana ci gaba da kasancewa m 'hard-phase' microdomains a cikin kai tsaye Layer, wanda ke da nasaba da motsin siloxanechains da kuma inganta yanayin yanayin yanayin yanayi.
2.Haɗawar Ƙungiya mai juriya mai zafi da kuma Babban-Bond-MakamashiCrosslinking Sites
Phenyl, diphenyl, ko carborane rukuni an gabatar da su a cikin polydimethylsiloxane kashin baya (misali, 20-30mol%% phenylcontent) don hana wutar lantarki motsi da fitar da duka gilashin yanayin zafi da yanayin zafi. yanayin zafi na rmaldecomposition.Tsarin haɗin gwiwar ya fi dacewa da yin aiki da ƙari-curehydrosilylation (Pt-catalyzed), ƙirƙirar-C-C-ko-Si-C-crosslinking gadoji tare da babban kwanciyar hankali.
3.ControlofMolecular Weight Tsakanin Crosslinks(Mc) da Lalacewar hanyar sadarwa
Ta hanyar daidaita abubuwan da ke cikin abubuwan da ke aiki da sinadarin hydrogen da kuma tsayin dakar da mai mai dauke da siliconeoil, ingantacciyar malanduni formMc (kimanin 5,000-15,000g/mol) an samu, yana tabbatar da cewa an samu. aiki yana da ƙarfin juriya har da ma'aunin zafi da sanyio.Tsarin bayan-curingorhigh-zazzabi-nealing ana amfani da shi don cinye ƙungiyoyin masu amsawa da haifar da damuwa da shakatawa ya haifar da lahani na hanyar sadarwa.
II.GradientModulus MultilayerAdhesive Structure-Ma'auniTaka da Tsari
'Primer-anchoringlayer+High-moduluscohesivelayer+Viscoelasticfunctionallayer'tsarin mai Layer uku
1.Primer-anchoringlayer(1-3μm): Yi amfani da asilane haɗin gwiwar da ke ɗauke da ƙungiyoyinepoxyoracryloyloxy, pre-polymerized tare daMQresin, don samar da haɗin gwiwar sinadarai ga PTFEsubstrate da haɗin gwiwar haɗin gwiwa tare da babban siliconelayer.
2.High-moduluscohesivelayer (babban jiki, kimanin.30-50μm): Amfani da girman-MQ-rabo, high-phenyl-content, high-crosslink-densitysiliconeadhesivetofurnisharobustshear-resistant skeleton.
III.Nanofillers don Gina JikiCrosslinking da Heat-Resistant kwarangwal
1.In-SituReinforcement and SurfaceModificationofNano-Silica
Themanufacturerusesfumedsilica (takamaiman yanayin saman200-380m²/g), da aka yi wa saman tare da vinyltriethoxysilaneorhexamethyldisilazane, ataloadingof10-25wt%. Reversiblephysicalcrosslinking network that dissipatesenergy and preventsmolecular chainslippageathhighsights.High-sheardispersione yana tabbatar da cewa silica yana wanzuwa''clusters'' tare da haɓaka ƙasa da 100nm, guje wa damuwa.
2.DirectionalCreepResistancevia2DNanomaterials
Ƙarin 1-5wt% ƴan-Layergrapheneororgano-gyaranano-montmorillonite,wanda ke daidaita tsarin tsararru ta hanyar juzu'i-jarraba alignment yayin sutura, formsa 'mazeffect' paralleltothetapep layi, da mahimmin ƙara juriya ga sarƙoƙi mai motsi a cikin juzu'i mai ƙarfi.
IV.ChemicallyIntegrated Substrate–MaɗaukakiInterface da Sarrafa Tsari
1.SurfaceActivation da BifunctionalPrimer forChemicalBonding
An fara yi wa PTFE saman fuska tare da assodium-naphthalene-THFsolutionorlow-pressureargon/oxygenplasmatogenerateanactivatedlayer dauke da carboxylandhydroxylgroups.Aprimersolution dauke dabifunctional kwayoyin halitta (misali, isocyanatesilane, titanatecouplingagent+theepoxymedialy) Daya daga cikin na farko ya yi aiki tare da-OH/- COOHonthePTFE saman, yayin da sauran kuma sun shiga cikin hydrosilylation ko condensation crosslinking tare da siliconeadhesive, formingachemical bond cibiyar sadarwa wanda ke ratsa tsakani. Wannan kusanci zai iya ƙara girma-mafi ƙarfi-lokacin 3 ° 3 6.
Abubuwan da aka yi amfani da su na kayan aiki: na farko, warwarewar da aka yi amfani da su da kuma matakan da ake amfani da su a 80-100 ° C; sa'an nan kuma na'ura mai aiki da karfin ruwa da kuma tarawa na MQresinare an kammala shi150-170 ° C; a karshe, post -curingiscarriedoutat200-220°C na tsawon sa'o'i da yawa don kawar da damuwa na ciki da daidaita wuraren haɗin gwiwar jiki.Sannan kwantar da hankali yana hana ƙananan ƙwayoyin cuta da daban-daban na ƙazanta.
Idan kuna son samun zurfin zurfin ilimin samfuran samfuran - gami da Teflon high-temperaturefabric, Teflonhigh-temperaturetepe, Teflonhigh-zazzabi mai zafi, maras ƙarfi na belts don haɗin gwiwar injina, mai gefe guda,PTFEfabric high-zazzabi masu jure wa belts, high-zazzabi resistant fiberglassfabric, da ƙari-tare da cikakken bayani dalla-dalla, aikace-aikace yanayin yanayi, da kuma gyara hanyoyin, don Allah a ji free to tuntube ta tashoshi masu zuwa:
