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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 rayuwa.
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 kasusuwan 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 WeightTsakanin Crosslinks(Mc) da Lalacewar hanyar sadarwa
Ta hanyar daidaita abubuwan da ke cikin abun ciki na hydrogen da kuma tsayin dakar da man da ke dauke da siliconeoil, ingantacciyar malanduni formMc (kimanin 5,000-15,000g/mol) an cimma, tabbatar da cewa aiki yana ɗaukar tsayin daka haɗe da ma'aunin zafi da sanyio.Maɗaukaki bayan-curingorhigh-zazzabi-nealing ana amfani da shi don cin amfanin ƙungiyar masu ba da amsawa da haifar da damuwa da kwanciyar hankali ya haifar da lahani na hanyar sadarwa.
II.GradientModulus MultilayerAdhesiveTructure-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 nau'ikan haɗin gwiwar 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 fuskar fuska200-380m²/g), da aka yi wa saman tare da vinyltriethoxysilaneorhexamethyldisilazane, ataloadingof10-25wt%.Thenano-SiO₂formshydrogenbonds da physicaladsorption, Reversiblephysicalcrosslinking network that dissipatesenergy and preventsmolecular chainslippageathhighsighter.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 jujjuyawar juzu'i yayin sutura, formsa 'mazeeffect' 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 wanda ya ƙunshi carboxylandhydroxylgroups.Aprimersolution yana ɗauke da ƙwayoyin ƙwayoyin cuta (misali, isocyanatesilane, titanatecouplingagent+theepoxymedialy) Daya daga cikin na farko yana amsawa tare da-OH/- COOHonthePTFE saman, yayin da sauran kuma suka 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 6 ° 3.
Abubuwan da aka yi amfani da su na kayan aiki: na farko, warwarewar da aka yi amfani da su da kuma adhesivelayeris matakin 80-100 ° C; sa'an nan kuma na'ura mai aiki da karfin ruwa da kuma tattara kayan aikin MQresina ya cika a150-170 ° C; ƙarshe, post -curingiscarriedoutat200-220°C na tsawon sa'o'i da yawa don kawar da damuwa na ciki da kuma 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 Teflonhigh-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:
Muna ci gaba da ba da ƙwararrun ƙwararrun ƙwararrun ƙwararrun sabis na falsafar sabis, da ƙaddamarwa don ba ku tare da tsayawa guda ɗaya da sabis na kulawa!
