3results about How to "Controllable mechanical properties" patented technology

The invention discloses a method for regulating and controlling the morphology of in-situ SiC whiskers in a SiCf / SiC composite material based on an SLS technology, and belongs to the field of additive manufacturing of ceramic matrix composite materials. The invention aims to solve the problem that in the prior art, a toughening phase and an additive technology cannot be combined to realize high toughness of a composite material or strength and toughness regulation and control. The method comprises the following steps: 1, preparing original powder; 2, preparing an initial blank of the SiC ceramic-based composite material; 3, sintering; 4, dipping; 5, cross-linking and curing; 6, cracking; and 7, circular treatment. The method is used for regulating and controlling the morphology of the in-situ SiC crystal whiskers in the SiCf / SiC composite material based on the SLS technology.

The invention discloses a recyclable photocuring 3D printed soluble microneedle patch and a preparation method thereof. The microneedle patch is composed of a soluble needle body layer and a flexible recoverable backing layer. The needle body layer is prepared into a polymerizable eutectic solvent through a specific composition, eutectic gel of a multi-hydrogen-bond cross-linked network is formed during photopolymerization, and rapid dissolution and effective drug delivery can be achieved. Eutectic gel prepared from the backing layer by utilizing a similar principle can be dissolved and recycled through ethanol and is circularly printed. The DLP 3D printing technology is utilized, personalized manufacturing of the soluble microneedle patch is achieved, meanwhile, the problem that a traditional microneedle backing layer cannot be recycled is solved, resource waste and environmental pollution are reduced, and the soluble microneedle patch is suitable for multiple fields such as drug delivery, vaccination and skincare.

This invention discloses a biomass porous aerogel, its preparation method, and its applications. The preparation method includes the following steps: S1: Sugarcane bagasse is soaked in an alkaline solution, washed, and its pH value is adjusted to 7; after drying, it is carbonized in an inert gas atmosphere to obtain carbonized sugarcane bagasse fiber; S2: Ti3AlC2 is weighed and etched with LiF and HCl to obtain multilayer MXene material; the multilayer MXene material is sonicated in an inert gas atmosphere, centrifuged, and the supernatant is collected and freeze-dried to obtain MXene nanosheets; S3: MXene nanosheets and carbonized sugarcane bagasse fiber are mixed, hydroxyethyl cellulose is added, and after stirring and freezing, ice crystals are removed in a vacuum to obtain biomass porous aerogel. The biomass porous aerogel prepared by this invention has low density, semiconductor properties, significant reversible compression, and excellent mechanical properties, and also features low thermal conductivity, reusability, and low cost.