Zotsatira Za Methyl Hydroxyethyl Cellulose Pa Epoxy Resin Matrix

Methyl Hydroxyethyl Cellulose (MHEC) ndi madzi osungunuka a cellulose ether omwe amagwiritsidwa ntchito kwambiri muzomangamanga monga thickener ndi rheology modifier mu cementitious systems. Amadziwika kuti amawongolera kayendedwe kake, magwiridwe antchito, komanso kumamatira kwa zida za simenti, zomwe zimapangitsa kuti zikhale zowonjezera zopangira konkriti, matope, ndi grout. Komabe, zotsatira za MHEC pazinthu za epoxy resin matrices zalandira chidwi chochepa.

Epoxy resins ndi gulu la ma polima a thermosetting omwe amagwiritsidwa ntchito kwambiri muzamlengalenga, magalimoto, ndi mafakitale omanga chifukwa cha luso lawo lamakina, kukana mankhwala, komanso kumamatira kumadera osiyanasiyana. Komabe, amatha kukhala osasunthika ndikuwonetsa mphamvu zochepa, zomwe zimalepheretsa kugwiritsidwa ntchito kwawo pazinthu zina. Pofuna kuthana ndi vutoli, ofufuza afufuza za kugwiritsa ntchito zowonjezera zosiyanasiyana, kuphatikizapo ma cellulose ethers, kuti apititse patsogolo kulimba ndi kukhudzidwa kwa ma epoxy resins.

Kafukufuku wambiri wanena za kugwiritsa ntchito MHEC ngati chowonjezera mu matrices a epoxy resin. Mwachitsanzo, kafukufuku wa Kim et al. (2019) adafufuza momwe MHEC imakhudzira makina opangira ma epoxy-based composites. Ofufuzawa adapeza kuti kuwonjezeredwa kwa MHEC kumathandizira kulimba kwa fracture ndi mphamvu yamagulu amagulu, komanso kukhazikika kwamafuta ndi kukana madzi. Olembawo adanena kuti kusintha kumeneku kumapangitsa kuti MHEC ipange zomangira za haidrojeni ndi epoxy resin matrix, zomwe zinawonjezera kugwirizanitsa kwa nkhope ndikuletsa kufalikira kwa ming'alu.

Kafukufuku wina wa Pan et al. (2017) adafufuza zotsatira za MHEC pamayendedwe ochiritsa komanso makina a epoxy resin system. Ofufuzawa adapeza kuti kuwonjezera kwa MHEC kunachedwetsa nthawi yochiritsa ndikuchepetsa kutentha kwakukulu kwa epoxy resin, komwe kumadziwika ndi chikhalidwe cha hydrophilic cha MHEC. Komabe, kuwonjezera kwa MHEC kunathandizanso kuti mphamvu yowonjezereka ikhale yowonjezereka panthawi yopuma ya epoxy resin yochiritsidwa, kusonyeza kuti MHEC ikhoza kusintha kusinthasintha ndi kulimba kwa matrix a epoxy resin.

Kuphatikiza pa kukonza makina a epoxy resin matrices, MHEC yadziwikanso kuti ili ndi zotsatira zabwino pamagulu a rheological of epoxy-based systems. Mwachitsanzo, kafukufuku wa Li et al. (2019) adafufuza momwe MHEC imakhudzira ma rheology ndi makina amakina a zomatira zochokera ku epoxy. Ofufuzawa adapeza kuti kuwonjezera kwa MHEC kunapangitsa kuti khalidwe la thixotropic la zomatira lichepetse kukhazikika kwa zodzaza. Kuphatikizika kwa MHEC kunathandiziranso mphamvu yomatira komanso kukana kwa zomatira.

Ponseponse, kugwiritsa ntchito MHEC monga chowonjezera mu matrices a epoxy resin kwawonetsa zotsatira zabwino pakuwongolera makina, kulimba, ndi machitidwe a rheological a dongosolo. Kuthekera kwa MHEC kupanga ma hydrogen bond ndi epoxy resin matrix akukhulupirira kuti ndi njira yofunika kwambiri yosinthira izi, zomwe zingayambitse kumamatira kwapakati komanso kuchepetsa kufalikira kwa ming'alu. Komabe, kufufuza kwina kumafunika kuti mumvetse bwino momwe MHEC imakhudzira matrices a epoxy resin matrices ndi kukhathamiritsa ntchito ya cellulose ether mu epoxy-based formulations.