Mayelana nomshini wokukhipha

Amaphuzu ayisithupha athakazelisayo! Amadevu e-calcium carbonate anamandla athembisayo
Mayelanaumshini we-extrusion:
I-calcium carbonate ijwayelekile, kodwa ayini amadevu e-calcium carbonate?

Amadevu ayimicu emifushane eyenzeka ngokwemvelo noma eyenziwe ngesakhiwo sekristalu esisodwa, esincane kakhulu ngobubanzi ngokulandelana kobukhulu (ama-micron), anesilinganiso esikhulu futhi ngokuvamile abhekwa njengezinto zekristalu ezinesilinganiso esisodwa.

Kuye kwasungulwa amakhulu ama-whiskers, okuhlanganisa ama-whiskers amaningi ensimbi njenge-nickel ne-iron, ama-whiskers e-oxide njenge-MgO ne-ZnO, ama-whiskers e-ceramic njenge-SiC, ama-whiskers e-boride njenge-TiB2 ne-ZrB2, kanye namanye ama-whiskers amaningi angaphili futhi angokwemvelo.

I-Calcium carbonate whisker iyinto yokwenziwa yekristalu eyodwa, ifomula yamakhemikhali yi-CaCO3, isisindo sama-molecule esihlobene singama-100.09, lapho i-CaO ne-CO2 kubalwa khona ngama-56.03%, ama-43.97%, iphuzu layo lokuncibilika lingu-759 ℃, ubuningi bungu-2.86g/cm3. I-calcium carbonate whisker ivame ukuba yimpuphu emhlophe ekhululekile, kuma-microscope e-electron okuskena amakristalu afana nenaliti noma ane-fibrous, ubude bungu-20-60μm, ububanzi obufushane bungu-0.5-1.0μm, isilinganiso sobude nobubanzi singu-20-30, singesesigaba se-aragonite.

Izakhiwo zama-whiskers e-calcium carbonate zingcono kunezezinye izinto ngokumhlophe, ukumelana nokushisa kanye nokumelana nokuguguleka, ngakho-ke zinamathuba amahle okusetshenziswa emikhakheni eminingi.

Ukusetshenziswa kwepulasitiki

Amadevu e-calcium carbonate anesilinganiso esikhulu sesici kanye nosayizi omncane wekristalu, cishe akukho ukuhlukana kwangaphakathi, imingcele yokusanhlamvu kanye nezinye izinkinga kukristalu jikelele, izakhiwo zemishini eziseduze nekristalu engashintshi, ngakho-ke kuzongezwa kumphumela wokuqinisa wepulasitiki usobala kakhulu, kungathuthukisa ngempumelelo amandla, i-modulus enwebekayo kanye nezinye izakhiwo zemishini.

Ukuhlolwa kubonise ukuthi nge-polyethylene, izakhiwo zemishini zama-whiskers agcwele i-calcium carbonate zingcono kuneze-talc egcwele, i-glass fibre kanye ne-calcium carbonate ejwayelekile elula. Ama-whiskers e-calcium carbonate anomphumela omkhulu wokuthuthukisa amandla ku-polyethylene futhi anomthelela omncane ekubushelelekeni komkhiqizo uma kuqhathaniswa ne-glass fibre.

Uma amadevu e-calcium carbonate efakwa esikhundleni semicu yengilazi entweni ye-nylon, umkhiqizo ophumayo uba nokuphela okungcono futhi inhlanganisela ingasetshenziswa ekwenziweni kwemikhiqizo yepulasitiki enembile.

Ngaphezu kwalokho, ngokungafani nezinye izinto, ukwakheka kwama-whiskers e-calcium carbonate kutholakala ngobuningi emvelweni futhi kusakazeke kabanzi. I-calcium carbonate ingasabela ngamakhemikhali nama-asidi aqinile ukukhiqiza i-carbon dioxide kanye nosawoti we-inorganic. Uma umzimba uphefumula inani elincane le-calcium carbonate, lizobola ngenxa yokusabela kwemvelo komzimba futhi ngeke libangele noma yimuphi umonakalo. Ngakho-ke, ukusetshenziswa kwama-whiskers e-calcium carbonate njengento yokuqinisa amapulasitiki abolayo akubanga ukungcola kwesibili endaweni yemvelo futhi kunganciphisa ngempumelelo ukungcola okumhlophe futhi kuvikele indawo.

Izicelo zerabha

Ama-whisk e-calcium carbonate angangezwa enjolobeni yemvelo njengesigcwalisi, kodwa ngenxa yokuhlanganiswa okubi kwesigcwalisi kanye nenjoloba yemvelo, kudalwa umphumela wesikhala somphezulu. Ngakho-ke, ama-whisk e-calcium carbonate adinga ukuthuthukiswa. UChen Tao nabanye basebenzise i-Si-69, i-sodium stearate kanye ne-titanate coupling agent ukuthuthukisa ama-whisk e-calcium carbonate. Ukuhlolwa kubonise ukuthi ama-whisk e-calcium carbonate aphathwe kahle ayenamandla aphezulu omhlaba kanye nokuxhumana okuthuthukisiwe kwe-interfacial nenjoloba yemvelo, okungadlala indima ebalulekile ekuqinisweni kwenjoloba yemvelo.

Izicelo ezintweni zokungqubuzana

Amadevu e-calcium carbonate anokumelana okuhle nokushisa futhi angasetshenziswa ezintweni zokungqubuzana ukuze athuthukise kakhulu ukumelana nokuguguleka.

ULi Litao wasebenzisa ama-whiskers e-calcium carbonate kuma-linings e-brake ezimoto futhi wahlola izakhiwo ezikhulisa futhi zinciphisa ukungqubuzana kwama-whiskers e-calcium carbonate kanye nokuqhathaniswa kwama-whiskers e-asbestos, i-calcium carbonate esindayo kanye ne-calcium carbonate. Imiphumela yokuhlola ikhombisa ukuthi i-coefficient yokungqubuzana, izinga lokuguguleka kanye nezakhiwo zemishini kuma-linings e-brake ezimoto kuthuthukiswa uma i-whisker ye-calcium carbonate ingezwa ku-15%; ngaphezu kwalokho, ukusebenza kwayo okuphelele kuphakeme kunezinye ezimbili.

Izicelo ekumbozweni

Embonini yokugqoka, ama-whiskers e-calcium carbonate asetshenziswa kabanzi ekugqokeni kwamanzi. Ekugqokeni kwamanzi, ama-whiskers e-calcium carbonate angasebenza njengomgogodla ekugqokeni ngenxa yokwakheka kwawo okuhle kanye nokuhlakazeka okuhle, okwenza kube nomthelela ophelele ezimpahleni ezinhle kakhulu ze-whiskers ze-calcium carbonate. Ama-whiskers agcwele ama-whiskers e-calcium carbonate acwebezelisiwe, ukuhlakazeka okungcono kanye nokuncishiswa kokucwila. Lapho kusetshenziswa ama-whiskers e-calcium carbonate ekugqokeni, i-viscosity yengubo iyanda kakhulu, njengoba kunjalo ne-thixotropy, amandla okubopha kanye nokuqina kokugcina. Ngaphezu kwalokho, ngenxa yezakhiwo zama-whiskers e-calcium carbonate, angasatshalaliswa ngokulinganayo kuma-silica sols kanye nezixazululo ze-emulsion, ngaleyo ndlela kuncishiswe ukungaqhubeki kwengubo, okusebenzayo kakhulu.

Izicelo ekukhiqizweni kwephepha

Embonini yephepha, ukusetshenziswa kwe-granular calcium carbonate njengento yokugcwalisa sekuthuthukise kakhulu ukusebenza kanye nesivinini sokuphrinta iphepha, kuyilapho ukusetshenziswa kwe-calcium carbonate whiskers njengento yokugcwalisa kunikeza owokuqala ukuphrinta okungcono kakhulu futhi kungasetshenziswa njengesithasiselo sokukhiqiza iphepha elimhlophe kakhulu kanye nokuba yisicaba okungcono. Ngenxa yesimo salo kanye nezakhiwo zalo ezithile, iphepha elenziwe nge-calcium carbonate whiskers linokuphrinta okungcono, amandla aphezulu kanye nokugcinwa okungcono kunephepha elenziwe nge-calcite. Ngakho-ke, ngenxa yale nzuzo, i-calcium carbonate whiskers inekusasa elithembisayo kakhulu embonini yephepha, ikakhulukazi ekukhiqizweni kwephepha elinezicelo nezidingo ezahlukene.

Izicelo ezintweni zokwelapha

Ngaphezu kokusetshenziswa kwezimboni, ama-whiskers e-calcium carbonate nawo avame ukusetshenziswa ezintweni zokwelapha. I-calcium iyinto ebalulekile emzimbeni womuntu, ngokuvamile ngesimo se-calcium phosphate, okuyingxenye eyinhloko yamathambo. Ama-composite amathambo okwenziwa angalungiswa ngokugcwalisa ama-whiskers e-calcium carbonate nokuthuthukisa izakhiwo zemishini zento. Ama-composite amathambo okwenziwa alungiswa nguXu Duyang et al. besebenzisa indlela yesisombululo esixubile. Imiphumela yokuhlola ikhombisa ukuthi izinto zamathambo okwenziwa azibangeli umonakalo kumaseli abantu futhi zibaluleke kakhulu kwezokwelapha. Ngaphezu kwalokho, ama-whiskers e-calcium carbonate abhekwa njenge-stimulant eluhlaza, engenabo ubuthi kwezokwelapha. Ama-whiskers e-calcium carbonate nawo asetshenziswa emkhakheni wezokwelapha njengento esebenzayo yokwenza imithombo yokukhulisa. Kungashiwo ukuthi ama-whiskers e-calcium carbonate nawo angenza umehluko emkhakheni wezokwelapha.