Ka taea e ngā muka nano te whakapai ake i ngā āhuatanga ā-pūkaha o ngā rauemi, ā, e kiia ana he rauemi whakapakeke pai mō te whakarite i ngā hauwaiora whakauru. Heoi, ko te whakatakotoranga paparanga, te tohatoha koretake rānei o ngā muka nano mārama i roto i te anga hauwaiora ka arahi ki te iti o ngā āhuatanga ā-pūkaha me te kore mārama o ngā hauwaiora whakauru. Ko te whakarite i tētahi hauwaiora kawe ioniki kaha, totoro, ā, ōrite hoki, me te kore e whakararu i te mārama, he wero nui tonu.

I pūrongohia te In Situ Synthesis of Mechanically Robust, "In Situ Synthesis of Mechanically Robust," nā Ding Bin rāua ko Zhang Shichao o te Kura Kakahu, Te Whare Wānanga o Donghua, I roto i ngā Rauemi Mahi Matatau, Ngā Hydrogels Whakakaha-nano muka mārama (SFRHS) mō te Pūrongo Maha Tino Tairongo me te pumau ā-pūkaha me te hiko.

I whakaritea he hydrogel SFRHS mārama kua whakakahangia ki te nanofiber mā te whakakotahi i ngā nanofiber silica me te vinylsilane ki roto i te hydrogel konutai alginate (SA)/polyacrylamide (PAM). I honoa ngā mekameka PAM ki ngā nanofiber silica mā te silane, ka hanga he hononga matū kaha. Hei tāpiri, ko te hononga i waenga i ngā nanofiber silica me ngā mekameka PAM ka whakarato i ngā taunekeneke kore-covalent (pērā i ngā hononga hauwai) ka pakaru pea, ka hono anō i te wā e totoro ana, e whakamarara ana i te pūngao me te whakakotahi i te whatunga hydrogel.

Ko te ōwehenga āhua teitei o ngā muka nano silica me te hononga pumau i waenga i ngā muka nano me te whatunga hydrogel e whai wāhi ana ki ngā āhuatanga miihini pai rawa atu o ngā SFRH. I te tuatahi i whakaritea e te rōpū rangahau he hydrogel whakakaha nano silicon kore-silane me te hononga ā-tinana anake i te hononga. I tautuhia te hydrogel ko P-SFRHS. Ina piki te ōwehenga āhua o ngā muka nano silicon mai i te 50 ki te 400, ka tino piki ake te kaha miihini o ngā muka nano (mai i te 0.11 MPa ki te 0.24 MPa), e pā ana pea ki te pikinga o te kaha o te hononga.

Hei whakapai ake i te whai huatanga o te whakawhiti kawenga ā-mata, i whakaurua te TMSPMA i waenganui i ngā muka nano me te matrix hydrogel, ā, i tuhia te hydrogel hei C-SFRHS. Ko te kaha ā-pūkaha o te C-SFRHS he 0.3MPa, ko te taumahatanga he 1400%, ā, ko te modulus a Young he 0.11MPa. He pai ake te modulus teitei o te C-SFRHS i ērā o ngā hydrogels uaua o nāianei me te nui o te wai.

Hei mārama ki te tikanga whakapakari o ngā muka nano, i inehia ngā pānga o te ōwehenga L/D me te here hononga ki ngā āhuatanga ā-kanohi o te SFRH mā te whakamahi i te whakatauira irahiko ngota ngota katoa (MD). E rua ngā momo muka nano silicon me ngā ōwehenga L/D rerekē, ko te P-SFRH5 me te P-SFRH10, me te C-SFRH10 me te whakaurunga tāpiri o te TMSPMA, i whakamahia hei tauira e toru. E whakaatu ana ngā hua ka piki ake te kaha taunekeneke mai i te 1135 ki te 2241 kJ·mol-1 me te pikinga o te ōwehenga L/D, e tohu ana ka kaha ake ngā taunekeneke ā-tinana, pērā i ngā kaha van der Waals, ngā kaha Coulomb, me ngā here hauwai i waenga i ngā muka nano silicon me te matrix hydrogel. Whai muri i te whakaurunga o te here hononga pumau, ka taea te whakanui ake i te atanga o te hydrogel hiato ki te 4000 kJ·mol-1. Hei tāpiri, ka whakatauirahia te waku atanga o ngā tauira e toru mā te tuhi, ā, ka tatauhia te waku atanga o ngā tauira e toru i runga i te ngaronga o te kaha nekeneke. Ko te waku mōrahi o C-SFRH10 he 3.34 NN (ko te P-SFRH5 me te P-SFRH10 he 1.06 me te 1.87 NN). Nā te kaha waku nui nei ka uaua te neke i waenga i ngā muka nano silicon me te matrix hydrogel, e rite ana ki te modulus me te kaha teitei rawa atu i kitea mō ngā C-SFRH.

Ngā āhuatanga miihini me te tikanga whakapakari o te SFRHS

Ki te whakatauritea ki te iti o te hysteresis o ngā P-SFRH, i whakaatuhia e ngā C-SFRH he hysteresis nui ake i roto i ngā whakamātautau huringa uta me te tango, engari ko te whakarerekētanga pumau i muri i te tango he tata koretake, e whakaatu ana i tōna pakari me te superelasticity. I muri i te 1000 whakamātautau kume huringa, kāore i tino heke te modulus a Young, te ahotea mōrahi me te tauwehenga ngaronga pūngao o te C-SFRHS. Ki te whakatauritea ki ngā hydrogels tikanga pakarukaru, e whakaatu ana ngā SFRH i te kaha o te kaha ki te pehi me te ahotea pehi teitei (2.6 MPa i te 90% taumahatanga). I tua atu, ka taea te pehi tonu i raro i aua taumahatanga nui me te kore e hinga te hanganga. I tua atu, i kitea me te pikinga o te ihirangi o ngā nanofibers SiO2, ka heke haere te aukati, e tohu ana ko te kawe ionic o ngā SFRH e whakaatu ana i te ia o te pikinga. 

E rua ngā pānga i hua ai te whakapainga o te kawe hiko ionic: tuatahi, ko te iti o ngā muka nano silica kore-kawe i roto i te hydrogel hiato ka whakarite kia nui te nekenekehanga o ngā ion i roto i te wai. Tuarua, ko ngā muka nano silica me te ōwehenga āhua teitei me te mata waikawa (rōpū-OH) ka kukume i ngā ion whakahē, ā, ka hanga he hongere kawe hiko tino kaha puta noa i te hydrogel.

Te kaha rawa o te elasticity me te kawe ionic o te SFRHS

He tino tairongo te SFRHS me te pumau o te tohanga toto i roto i te whānuitanga o ngā rongo, ā, ka taea te whakamahi hei aroturuki i te nekehanga me te pā o te tangata. Ka taea e ngā SFRH te aroturuki i ngā whakaohooho uaua me ngā whakaohooho iti o waho, pērā i te tuhituhi ā-ringa, me ētahi atu, he mea nui pea hei whakamahi i roto i te aukati tuhituhi ā-ringa me ētahi atu mara.

Te mahi pūoko SFRHS

Taitara o te Kaupapa: Te Hanganga In Situ o ngā Hydrogels Nanofiber-Whakapakarihia, Kaha, Mārama hoki mō te Pūrongo Maha Tino Tairongo

DOI: 10.1002 / adfm. 202103117