Imikhiqizo ye-Fumed Silica: Ukuhlaziywa Kobuchwepheshe, Izicelo, Nokulawulwa Kwekhwalithi - Ukuthuthukisa Ukusebenza Ngokuguqulwa Okunembayo Nokuqina Kokuhlakazeka - I-NetEase

Ukuhlaziywa Kwezobuchwepheshe Kwemikhiqizo ye-Fumed Silica

I. Izimpawu Eziyisisekelo kanye Nenqubo Yokulungiselela

I-silica evuthayo (i-CAS No.112945-52-5) i-nanoscale powder material eyenziwe yi-high-temperature hydrolysis (ku-1800 ℃) ye-silicon tetrachloride noma i-methyltrichlorosilane elangabini le-hydrogen-oxygen. Amapharamitha ajwayelekile angokomzimba ami kanje:

Isakhiwo sayo se-dendritic esinezinhlangothi ezintathu sakhiwa ama-aggregates (Ama-aggregates) ezinhlayiya ezincibilikisiwe eziyinhloko (izinhlayiya Eziyinhloko) ngokusebenzisa i-hydrogen bonding, futhi yakha inethiwekhi e-flocculent ngokusebenzisa i-adsorption ebonakalayo (Umfanekiso 1).

II. Amazinga Okuhlelwa Kwezobuchwepheshe

Ngokusho kwe-GB/T 32678-2016, ihlukaniswe yaba:

Uhlobo lwe-Hydrophilic (Uhlobo A)

• Ukuminyana kwamaqembu e-hydroxyl engaphezulu: 2.5-3.5 nge-nm² (kukalwa nge-acid-base titration)

• Inani le-pH: 3.6-4.3 (10% ukuhlakazeka kwe-aqueous)

• Inani lokumunca uwoyela: 2.5-3.5g/100g (ASTM D281)

Uhlobo lwe-Hydrophobic (Uhlobo B)

• I-ejenti yokwelapha ebusweni: I-Hexamethyldisilazane/Dimethyldichlorosilane

• I-engeli yokuxhumana: ≥120° (indlela yokumanzisa ashukumisayo)

• Okuqukethwe kwekhabhoni: 0.5-5.0% (ukuhlaziya okuyisisekelo)

III. Izimpawu Zokusebenza Ezibalulekile

Ukuqinisa Umphumela

Kurabha ye-silicone, ukwengeza u-15phr we-silica evuthayo kungakhuphula amandla aqinile ukusuka ku-0.5MPa kuye ku-12MPa (GB/T 528). Indlela yokuqinisa ihlanganisa:

Thixotropic Property

Ezingubo zokugqoka, ngenani elingeziwe lika-0.5-2.0%, lingafinyelela:

Izimpawu ze-Adsorption

Kunobudlelwano bomugqa phakathi kwendawo ethile engaphezulu namandla okukhangisa:

Uma i-S = 380m²/g, inani lokumunca le-DBP lifinyelela ku-320g/100g (ASTM D2414).

IV. Ipharamitha Yezobuchwepheshe Yesicelo Esijwayelekile

Ukuqiniswa kwe-Silicone Rubber

Anti-sedimentation of Coatings

Anti-caking in Ukudla

V. Ubuchwepheshe Bokuguqulwa Kobuso

Ukuguqulwa kwe-in-situ

Yethula izinto ezihlanganisa i-silane (ezifana ne-KH-550) esigabeni sokuhlanganisa:

Ukuguqulwa Kwangemuva Kokwelashwa

Amapharamitha wenqubo yokumanzisa:

VI. Amaphuzu Abalulekile Wokulawula Ikhwalithi

Ukulahleka kokuthungela: ≤2.0% (105℃×2h)

Insalela kusihlungo (45μm): ≤0.04% (indlela yokusefa emanzi)

Okuqukethwe kwe-Chloride: ≤100ppm (indlela ye-potentiometric titration)

Isamba sokuqukethwe kwensimbi esindayo: ≤50ppm (ICP-OES)

(Imithombo yedatha: GB/T 20020-2013, ISO 18473-3:2018, Iphepha elimhlophe lobuchwepheshe lomkhiqizo wekhabhothi)

Lokhu okuqukethwe kungahlangabezana ngokunembile nezidingo ze-rheological zezimo zohlelo lokusebenza ezihlukene ngokulungisa indawo ethile (Umfanekiso 2), uhlobo lwamaqembu angaphezulu, kanye nezinga lokuhlanganisa. Intuthuko yamanje yobuchwepheshe igxile ekuguqulweni okunembayo kwendawo kanye nokwenza ngcono ukuzinza kokuhlakazeka, ukukhuthaza ukunwetshwa kokusetshenziswa kwayo emikhakheni esafufusayo efana nokuhlanganisa izihlukanisi zamabhethri zamandla amasha nezinto zokuphrinta ze-3D.