Iko Kubata KweMethyl Hydroxyethyl Cellulose PaEpoxy Resin Matrix

Methyl Hydroxyethyl Cellulose (MHEC) is water-soluble cellulose ether inoshandiswa zvakanyanya muindastiri yekuvaka seyakakora uye rheology modifier mumasimiti masisitimu. Iyo inozivikanwa kuvandudza kuyerera zvivakwa, kushanda, uye kunamatira kwezvinhu zvesimende, zvichiita kuti ive yakanakira yekuwedzera kwekongiri, dhaka, uye grout maumbirwo. Nekudaro, kukanganisa kweMHEC pazvinhu zveepoxy resin matrices kwakawana kutariswa kushoma.

Epoxy resins ikirasi ye thermosetting mapolymer ayo anoshandiswa zvakanyanya muaerospace, mota, uye maindasitiri ekuvaka nekuda kweakanakisa ma mechanic properties, makemikari kuramba, uye kunamatira kune akasiyana substrates. Nekudaro, ivo vanogona kuve brittle uye kuratidza yakaderera simba simba, izvo zvinomisa kushandiswa kwavo mune mamwe maapplication. Kugadzirisa nyaya iyi, vatsvakurudzi vakaongorora kushandiswa kwezvimwe zvinowedzera, kusanganisira cellulose ethers, kuvandudza kuoma uye kukanganiswa kwe epoxy resins.

Tsvakurudzo dzinoverengeka dzakashuma kushandiswa kweMHEC sechinhu chinowedzera mu epoxy resin matrices. Semuenzaniso, chidzidzo chaKim et al. (2019) yakaongorora mhedzisiro yeMHEC pane zvemichina zveepoxy-based composite. Vatsvakurudzi vakaona kuti kuwedzerwa kweMHEC kwakagadzirisa kuoma kwekuputsika uye simba rekugadzirisa kwezvakasanganiswa, pamwe chete nekugadzikana kwekupisa uye kudzivirira mvura. Vanyori vanoti izvi zvakagadziridzwa mukukwanisa kweMHEC kuumba hydrogen bonds ne epoxy resin matrix, iyo yakawedzera kunamatira kwemukati uye kudzivirira kupararira kwekuputika.

Imwe ongororo yakaitwa naPan et al. (2017) yakaongorora mhedzisiro yeMHEC pakurapa maitiro uye mechanical zvimiro zve epoxy resin system. Vatsvakurudzi vakaona kuti kuwedzerwa kweMHEC kwakanonoka nguva yekuporesa uye kuderedza kupisa kwakanyanya kwekuporesa kwepoxy resin, iyo inonzi inonzi hydrophilic nature yeMHEC. Zvisinei, kuwedzerwa kweMHEC kwakavandudzawo simba rekusimba uye kureba panguva yekuputika kwepoxy resin, zvichiratidza kuti MHEC inogona kuvandudza kushanduka uye kuoma kwe epoxy resin matrix.

Pamusoro pekuvandudza ma mechanic properties epoxy resin matrices, MHEC yakanziwo ine simba rakanaka pane rheological properties ye epoxy-based systems. Semuenzaniso, chidzidzo chakaitwa naLi et al. (2019) yakaongorora mhedzisiro yeMHEC pane rheology uye mekiniki zvimiro zveepoxy-based adhesive. Vatsvakurudzi vakaona kuti kuwedzerwa kweMHEC kwakagadzirisa maitiro ethixotropic ekunamatira uye kuderedza kugadziriswa kwemafuta. Kuwedzerwa kweMHEC kwakavandudzawo simba rekunamatira uye kupikisa kwemaitiro ekunamatira.

Pakazere, kushandiswa kweMHEC sechinhu chinowedzera mu epoxy resin matrices kwakaratidza mhedzisiro inovimbisa mukuvandudza ma mechanical properties, kuoma, uye rheological maitiro ehurongwa. Kugona kweMHEC kuumba hydrogen zvisungo ne epoxy resin matrix inotendwa kuti ndiyo nzira yakakosha kuseri kwekuvandudzwa uku, izvo zvinogona kutungamirira kukuwedzera kwekubatana kwemukati uye kuderedza kupararira kwekuputika. Zvisinei, imwe tsvakurudzo inodiwa kuti unzwisise zvizere zvinokonzerwa neMHEC pane zvinyorwa zve epoxy resin matrices uye kugadzirisa kushandiswa kwei cellulose ether mu epoxy-based formulations.